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i2c: drivers: Use generic definitions for bus frequencies
Since we have generic definitions for bus frequencies, let's use them. Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> Acked-by: Robert Richter <rrichter@marvell.com> Reviewed-by: Thor Thayer <thor.thayer@linux.intel.com> Acked-by: Elie Morisse <syniurge@gmail.com> Acked-by: Nehal Shah <nehal-bakulchandra.shah@amd.com> Reviewed-by: Brendan Higgins <brendanhiggins@google.com> Acked-by: Scott Branden <scott.branden@broadcom.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Acked-by: Baruch Siach <baruch@tkos.co.il> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Oleksij Rempel <o.rempel@pengutronix.de> Acked-by: Vladimir Zapolskiy <vz@mleia.com> Acked-by: Gregory CLEMENT <gregory.clement@bootlin.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Reviewed-by: Chris Brandt <chris.brandt@renesas.com> Reviewed-by: Baolin Wang <baolin.wang7@gmail.com> Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com> Acked-by: Patrice Chotard <patrice.chotard@st.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Reviewed-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
parent
7b8c4c0b2a
commit
90224e6468
@ -147,7 +147,7 @@ static void altr_i2c_init(struct altr_i2c_dev *idev)
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(ALTR_I2C_THRESHOLD << ALTR_I2C_CTRL_TCT_SHFT);
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u32 t_high, t_low;
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if (idev->bus_clk_rate <= 100000) {
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if (idev->bus_clk_rate <= I2C_MAX_STANDARD_MODE_FREQ) {
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tmp &= ~ALTR_I2C_CTRL_BSPEED;
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/* Standard mode SCL 50/50 */
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t_high = divisor * 1 / 2;
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@ -423,10 +423,10 @@ static int altr_i2c_probe(struct platform_device *pdev)
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&idev->bus_clk_rate);
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if (val) {
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dev_err(&pdev->dev, "Default to 100kHz\n");
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idev->bus_clk_rate = 100000; /* default clock rate */
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idev->bus_clk_rate = I2C_MAX_STANDARD_MODE_FREQ; /* default clock rate */
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}
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if (idev->bus_clk_rate > 400000) {
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if (idev->bus_clk_rate > I2C_MAX_FAST_MODE_FREQ) {
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dev_err(&pdev->dev, "invalid clock-frequency %d\n",
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idev->bus_clk_rate);
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return -EINVAL;
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@ -201,32 +201,37 @@ static int i2c_amd_resume(struct amd_i2c_common *i2c_common)
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}
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#endif
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static const u32 supported_speeds[] = {
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I2C_MAX_HIGH_SPEED_MODE_FREQ,
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I2C_MAX_TURBO_MODE_FREQ,
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I2C_MAX_FAST_MODE_PLUS_FREQ,
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I2C_MAX_FAST_MODE_FREQ,
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I2C_MAX_STANDARD_MODE_FREQ,
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};
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static enum speed_enum i2c_amd_get_bus_speed(struct platform_device *pdev)
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{
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u32 acpi_speed;
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int i;
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static const u32 supported_speeds[] = {
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0, 100000, 400000, 1000000, 1400000, 3400000
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};
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acpi_speed = i2c_acpi_find_bus_speed(&pdev->dev);
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/* round down to the lowest standard speed */
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for (i = 1; i < ARRAY_SIZE(supported_speeds); i++) {
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if (acpi_speed < supported_speeds[i])
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for (i = 0; i < ARRAY_SIZE(supported_speeds); i++) {
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if (acpi_speed >= supported_speeds[i])
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break;
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}
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acpi_speed = supported_speeds[i - 1];
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acpi_speed = i < ARRAY_SIZE(supported_speeds) ? supported_speeds[i] : 0;
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switch (acpi_speed) {
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case 100000:
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case I2C_MAX_STANDARD_MODE_FREQ:
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return speed100k;
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case 400000:
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case I2C_MAX_FAST_MODE_FREQ:
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return speed400k;
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case 1000000:
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case I2C_MAX_FAST_MODE_PLUS_FREQ:
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return speed1000k;
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case 1400000:
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case I2C_MAX_TURBO_MODE_FREQ:
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return speed1400k;
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case 3400000:
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case I2C_MAX_HIGH_SPEED_MODE_FREQ:
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return speed3400k;
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default:
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return speed400k;
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@ -997,7 +997,7 @@ static int aspeed_i2c_probe_bus(struct platform_device *pdev)
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if (ret < 0) {
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dev_err(&pdev->dev,
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"Could not read bus-frequency property\n");
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bus->bus_frequency = 100000;
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bus->bus_frequency = I2C_MAX_STANDARD_MODE_FREQ;
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}
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match = of_match_node(aspeed_i2c_bus_of_table, pdev->dev.of_node);
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@ -199,7 +199,7 @@ static int axxia_i2c_init(struct axxia_i2c_dev *idev)
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/* Enable Master Mode */
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writel(0x1, idev->base + GLOBAL_CONTROL);
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if (idev->bus_clk_rate <= 100000) {
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if (idev->bus_clk_rate <= I2C_MAX_STANDARD_MODE_FREQ) {
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/* Standard mode SCL 50/50, tSU:DAT = 250 ns */
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t_high = divisor * 1 / 2;
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t_low = divisor * 1 / 2;
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@ -765,7 +765,7 @@ static int axxia_i2c_probe(struct platform_device *pdev)
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of_property_read_u32(np, "clock-frequency", &idev->bus_clk_rate);
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if (idev->bus_clk_rate == 0)
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idev->bus_clk_rate = 100000; /* default clock rate */
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idev->bus_clk_rate = I2C_MAX_STANDARD_MODE_FREQ; /* default clock rate */
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ret = clk_prepare_enable(idev->i2c_clk);
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if (ret) {
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@ -858,25 +858,25 @@ static int bcm_iproc_i2c_cfg_speed(struct bcm_iproc_i2c_dev *iproc_i2c)
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if (ret < 0) {
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dev_info(iproc_i2c->device,
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"unable to interpret clock-frequency DT property\n");
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bus_speed = 100000;
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bus_speed = I2C_MAX_STANDARD_MODE_FREQ;
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}
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if (bus_speed < 100000) {
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if (bus_speed < I2C_MAX_STANDARD_MODE_FREQ) {
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dev_err(iproc_i2c->device, "%d Hz bus speed not supported\n",
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bus_speed);
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dev_err(iproc_i2c->device,
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"valid speeds are 100khz and 400khz\n");
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return -EINVAL;
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} else if (bus_speed < 400000) {
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bus_speed = 100000;
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} else if (bus_speed < I2C_MAX_FAST_MODE_FREQ) {
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bus_speed = I2C_MAX_STANDARD_MODE_FREQ;
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} else {
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bus_speed = 400000;
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bus_speed = I2C_MAX_FAST_MODE_FREQ;
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}
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iproc_i2c->bus_speed = bus_speed;
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val = iproc_i2c_rd_reg(iproc_i2c, TIM_CFG_OFFSET);
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val &= ~BIT(TIM_CFG_MODE_400_SHIFT);
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val |= (bus_speed == 400000) << TIM_CFG_MODE_400_SHIFT;
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val |= (bus_speed == I2C_MAX_FAST_MODE_FREQ) << TIM_CFG_MODE_400_SHIFT;
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iproc_i2c_wr_reg(iproc_i2c, TIM_CFG_OFFSET, val);
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dev_info(iproc_i2c->device, "bus set to %u Hz\n", bus_speed);
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@ -1029,7 +1029,7 @@ static int bcm_iproc_i2c_resume(struct device *dev)
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/* configure to the desired bus speed */
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val = iproc_i2c_rd_reg(iproc_i2c, TIM_CFG_OFFSET);
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val &= ~BIT(TIM_CFG_MODE_400_SHIFT);
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val |= (iproc_i2c->bus_speed == 400000) << TIM_CFG_MODE_400_SHIFT;
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val |= (iproc_i2c->bus_speed == I2C_MAX_FAST_MODE_FREQ) << TIM_CFG_MODE_400_SHIFT;
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iproc_i2c_wr_reg(iproc_i2c, TIM_CFG_OFFSET, val);
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bcm_iproc_i2c_enable_disable(iproc_i2c, true);
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@ -722,16 +722,16 @@ static int bcm_kona_i2c_assign_bus_speed(struct bcm_kona_i2c_dev *dev)
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}
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switch (bus_speed) {
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case 100000:
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case I2C_MAX_STANDARD_MODE_FREQ:
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dev->std_cfg = &std_cfg_table[BCM_SPD_100K];
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break;
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case 400000:
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case I2C_MAX_FAST_MODE_FREQ:
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dev->std_cfg = &std_cfg_table[BCM_SPD_400K];
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break;
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case 1000000:
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case I2C_MAX_FAST_MODE_PLUS_FREQ:
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dev->std_cfg = &std_cfg_table[BCM_SPD_1MHZ];
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break;
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case 3400000:
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case I2C_MAX_HIGH_SPEED_MODE_FREQ:
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/* Send mastercode at 100k */
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dev->std_cfg = &std_cfg_table[BCM_SPD_100K];
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dev->hs_cfg = &hs_cfg_table[BCM_SPD_3P4MHZ];
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@ -439,7 +439,7 @@ static int bcm2835_i2c_probe(struct platform_device *pdev)
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if (ret < 0) {
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dev_warn(&pdev->dev,
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"Could not read clock-frequency property\n");
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bus_clk_rate = 100000;
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bus_clk_rate = I2C_MAX_STANDARD_MODE_FREQ;
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}
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ret = clk_set_rate_exclusive(i2c_dev->bus_clk, bus_clk_rate);
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@ -104,9 +104,6 @@
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#define DRIVER_NAME "cdns-i2c"
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#define CDNS_I2C_SPEED_MAX 400000
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#define CDNS_I2C_SPEED_DEFAULT 100000
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#define CDNS_I2C_DIVA_MAX 4
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#define CDNS_I2C_DIVB_MAX 64
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@ -949,8 +946,8 @@ static int cdns_i2c_probe(struct platform_device *pdev)
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ret = of_property_read_u32(pdev->dev.of_node, "clock-frequency",
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&id->i2c_clk);
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if (ret || (id->i2c_clk > CDNS_I2C_SPEED_MAX))
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id->i2c_clk = CDNS_I2C_SPEED_DEFAULT;
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if (ret || (id->i2c_clk > I2C_MAX_FAST_MODE_FREQ))
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id->i2c_clk = I2C_MAX_STANDARD_MODE_FREQ;
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cdns_i2c_writereg(CDNS_I2C_CR_ACK_EN | CDNS_I2C_CR_NEA | CDNS_I2C_CR_MS,
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CDNS_I2C_CR_OFFSET);
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@ -99,16 +99,16 @@ static int dw_i2c_acpi_configure(struct platform_device *pdev)
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dw_i2c_acpi_params(pdev, "FMCN", &dev->fs_hcnt, &dev->fs_lcnt, &fs_ht);
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switch (t->bus_freq_hz) {
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case 100000:
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case I2C_MAX_STANDARD_MODE_FREQ:
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dev->sda_hold_time = ss_ht;
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break;
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case 1000000:
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case I2C_MAX_FAST_MODE_PLUS_FREQ:
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dev->sda_hold_time = fp_ht;
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break;
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case 3400000:
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case I2C_MAX_HIGH_SPEED_MODE_FREQ:
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dev->sda_hold_time = hs_ht;
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break;
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case 400000:
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case I2C_MAX_FAST_MODE_FREQ:
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default:
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dev->sda_hold_time = fs_ht;
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break;
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@ -198,10 +198,10 @@ static void i2c_dw_configure_master(struct dw_i2c_dev *dev)
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dev->mode = DW_IC_MASTER;
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switch (t->bus_freq_hz) {
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case 100000:
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case I2C_MAX_STANDARD_MODE_FREQ:
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dev->master_cfg |= DW_IC_CON_SPEED_STD;
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break;
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case 3400000:
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case I2C_MAX_HIGH_SPEED_MODE_FREQ:
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dev->master_cfg |= DW_IC_CON_SPEED_HIGH;
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break;
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default:
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@ -227,6 +227,13 @@ static void dw_i2c_plat_pm_cleanup(struct dw_i2c_dev *dev)
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pm_runtime_put_noidle(dev->dev);
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}
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static const u32 supported_speeds[] = {
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I2C_MAX_HIGH_SPEED_MODE_FREQ,
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I2C_MAX_FAST_MODE_PLUS_FREQ,
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I2C_MAX_FAST_MODE_FREQ,
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I2C_MAX_STANDARD_MODE_FREQ,
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};
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static int dw_i2c_plat_probe(struct platform_device *pdev)
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{
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struct dw_i2c_platform_data *pdata = dev_get_platdata(&pdev->dev);
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@ -236,9 +243,6 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
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u32 acpi_speed;
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struct resource *mem;
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int i, irq, ret;
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static const int supported_speeds[] = {
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0, 100000, 400000, 1000000, 3400000
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};
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irq = platform_get_irq(pdev, 0);
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if (irq < 0)
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@ -274,11 +278,11 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
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* Some DSTDs use a non standard speed, round down to the lowest
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* standard speed.
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*/
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for (i = 1; i < ARRAY_SIZE(supported_speeds); i++) {
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if (acpi_speed < supported_speeds[i])
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for (i = 0; i < ARRAY_SIZE(supported_speeds); i++) {
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if (acpi_speed >= supported_speeds[i])
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break;
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}
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acpi_speed = supported_speeds[i - 1];
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acpi_speed = i < ARRAY_SIZE(supported_speeds) ? supported_speeds[i] : 0;
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/*
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* Find bus speed from the "clock-frequency" device property, ACPI
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@ -289,7 +293,7 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
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else if (acpi_speed || t->bus_freq_hz)
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t->bus_freq_hz = max(t->bus_freq_hz, acpi_speed);
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else
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t->bus_freq_hz = 400000;
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t->bus_freq_hz = I2C_MAX_FAST_MODE_FREQ;
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dev->flags |= (uintptr_t)device_get_match_data(&pdev->dev);
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@ -303,8 +307,11 @@ static int dw_i2c_plat_probe(struct platform_device *pdev)
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* Only standard mode at 100kHz, fast mode at 400kHz,
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* fast mode plus at 1MHz and high speed mode at 3.4MHz are supported.
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*/
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if (t->bus_freq_hz != 100000 && t->bus_freq_hz != 400000 &&
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t->bus_freq_hz != 1000000 && t->bus_freq_hz != 3400000) {
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for (i = 0; i < ARRAY_SIZE(supported_speeds); i++) {
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if (t->bus_freq_hz == supported_speeds[i])
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break;
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}
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if (i == ARRAY_SIZE(supported_speeds)) {
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dev_err(&pdev->dev,
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"%d Hz is unsupported, only 100kHz, 400kHz, 1MHz and 3.4MHz are supported\n",
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t->bus_freq_hz);
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@ -18,7 +18,6 @@
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#define DEFAULT_FREQ 100000
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#define TIMEOUT_MS 100
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#define II_CONTROL 0x0
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@ -300,7 +299,7 @@ static int dc_i2c_probe(struct platform_device *pdev)
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if (of_property_read_u32(pdev->dev.of_node, "clock-frequency",
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&i2c->frequency))
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i2c->frequency = DEFAULT_FREQ;
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i2c->frequency = I2C_MAX_STANDARD_MODE_FREQ;
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i2c->dev = &pdev->dev;
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platform_set_drvdata(pdev, i2c);
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@ -64,8 +64,6 @@
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#define U2C_I2C_SPEED_2KHZ 242 /* 2 kHz, minimum speed */
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#define U2C_I2C_SPEED(f) ((DIV_ROUND_UP(1000000, (f)) - 10) / 2 + 1)
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#define U2C_I2C_FREQ_FAST 400000
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#define U2C_I2C_FREQ_STD 100000
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#define U2C_I2C_FREQ(s) (1000000 / (2 * (s - 1) + 10))
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#define DIOLAN_USB_TIMEOUT 100 /* in ms */
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@ -87,7 +85,7 @@ struct i2c_diolan_u2c {
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int ocount; /* Number of enqueued messages */
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};
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static uint frequency = U2C_I2C_FREQ_STD; /* I2C clock frequency in Hz */
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static uint frequency = I2C_MAX_STANDARD_MODE_FREQ; /* I2C clock frequency in Hz */
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module_param(frequency, uint, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(frequency, "I2C clock frequency in hertz");
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@ -299,12 +297,12 @@ static int diolan_init(struct i2c_diolan_u2c *dev)
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{
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int speed, ret;
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if (frequency >= 200000) {
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if (frequency >= 2 * I2C_MAX_STANDARD_MODE_FREQ) {
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speed = U2C_I2C_SPEED_FAST;
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frequency = U2C_I2C_FREQ_FAST;
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} else if (frequency >= 100000 || frequency == 0) {
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frequency = I2C_MAX_FAST_MODE_FREQ;
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} else if (frequency >= I2C_MAX_STANDARD_MODE_FREQ || frequency == 0) {
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speed = U2C_I2C_SPEED_STD;
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frequency = U2C_I2C_FREQ_STD;
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frequency = I2C_MAX_STANDARD_MODE_FREQ;
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} else {
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speed = U2C_I2C_SPEED(frequency);
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if (speed > U2C_I2C_SPEED_2KHZ)
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@ -388,7 +388,7 @@ static int efm32_i2c_probe(struct platform_device *pdev)
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if (!ret) {
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dev_dbg(&pdev->dev, "using frequency %u\n", frequency);
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} else {
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frequency = 100000;
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frequency = I2C_MAX_STANDARD_MODE_FREQ;
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dev_info(&pdev->dev, "defaulting to 100 kHz\n");
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}
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ddata->frequency = frequency;
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@ -164,13 +164,6 @@
|
||||
#define HSI2C_MASTER_ID(x) ((x & 0xff) << 24)
|
||||
#define MASTER_ID(x) ((x & 0x7) + 0x08)
|
||||
|
||||
/*
|
||||
* Controller operating frequency, timing values for operation
|
||||
* are calculated against this frequency
|
||||
*/
|
||||
#define HSI2C_HS_TX_CLOCK 1000000
|
||||
#define HSI2C_FS_TX_CLOCK 100000
|
||||
|
||||
#define EXYNOS5_I2C_TIMEOUT (msecs_to_jiffies(100))
|
||||
|
||||
enum i2c_type_exynos {
|
||||
@ -264,6 +257,9 @@ static void exynos5_i2c_clr_pend_irq(struct exynos5_i2c *i2c)
|
||||
* exynos5_i2c_set_timing: updates the registers with appropriate
|
||||
* timing values calculated
|
||||
*
|
||||
* Timing values for operation are calculated against either 100kHz
|
||||
* or 1MHz controller operating frequency.
|
||||
*
|
||||
* Returns 0 on success, -EINVAL if the cycle length cannot
|
||||
* be calculated.
|
||||
*/
|
||||
@ -281,7 +277,7 @@ static int exynos5_i2c_set_timing(struct exynos5_i2c *i2c, bool hs_timings)
|
||||
unsigned int t_ftl_cycle;
|
||||
unsigned int clkin = clk_get_rate(i2c->clk);
|
||||
unsigned int op_clk = hs_timings ? i2c->op_clock :
|
||||
(i2c->op_clock >= HSI2C_HS_TX_CLOCK) ? HSI2C_FS_TX_CLOCK :
|
||||
(i2c->op_clock >= I2C_MAX_FAST_MODE_PLUS_FREQ) ? I2C_MAX_STANDARD_MODE_FREQ :
|
||||
i2c->op_clock;
|
||||
int div, clk_cycle, temp;
|
||||
|
||||
@ -353,7 +349,7 @@ static int exynos5_hsi2c_clock_setup(struct exynos5_i2c *i2c)
|
||||
/* always set Fast Speed timings */
|
||||
int ret = exynos5_i2c_set_timing(i2c, false);
|
||||
|
||||
if (ret < 0 || i2c->op_clock < HSI2C_HS_TX_CLOCK)
|
||||
if (ret < 0 || i2c->op_clock < I2C_MAX_FAST_MODE_PLUS_FREQ)
|
||||
return ret;
|
||||
|
||||
return exynos5_i2c_set_timing(i2c, true);
|
||||
@ -376,7 +372,7 @@ static void exynos5_i2c_init(struct exynos5_i2c *i2c)
|
||||
i2c->regs + HSI2C_CTL);
|
||||
writel(HSI2C_TRAILING_COUNT, i2c->regs + HSI2C_TRAILIG_CTL);
|
||||
|
||||
if (i2c->op_clock >= HSI2C_HS_TX_CLOCK) {
|
||||
if (i2c->op_clock >= I2C_MAX_FAST_MODE_PLUS_FREQ) {
|
||||
writel(HSI2C_MASTER_ID(MASTER_ID(i2c->adap.nr)),
|
||||
i2c->regs + HSI2C_ADDR);
|
||||
i2c_conf |= HSI2C_HS_MODE;
|
||||
@ -748,7 +744,7 @@ static int exynos5_i2c_probe(struct platform_device *pdev)
|
||||
return -ENOMEM;
|
||||
|
||||
if (of_property_read_u32(np, "clock-frequency", &i2c->op_clock))
|
||||
i2c->op_clock = HSI2C_FS_TX_CLOCK;
|
||||
i2c->op_clock = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
|
||||
strlcpy(i2c->adap.name, "exynos5-i2c", sizeof(i2c->adap.name));
|
||||
i2c->adap.owner = THIS_MODULE;
|
||||
|
@ -68,8 +68,6 @@
|
||||
#define I2C_ARBITRATE_INTR BIT(1)
|
||||
#define I2C_OVER_INTR BIT(0)
|
||||
|
||||
#define HIX5I2C_MAX_FREQ 400000 /* 400k */
|
||||
|
||||
enum hix5hd2_i2c_state {
|
||||
HIX5I2C_STAT_RW_ERR = -1,
|
||||
HIX5I2C_STAT_INIT,
|
||||
@ -400,12 +398,12 @@ static int hix5hd2_i2c_probe(struct platform_device *pdev)
|
||||
|
||||
if (of_property_read_u32(np, "clock-frequency", &freq)) {
|
||||
/* use 100k as default value */
|
||||
priv->freq = 100000;
|
||||
priv->freq = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
} else {
|
||||
if (freq > HIX5I2C_MAX_FREQ) {
|
||||
priv->freq = HIX5I2C_MAX_FREQ;
|
||||
if (freq > I2C_MAX_FAST_MODE_FREQ) {
|
||||
priv->freq = I2C_MAX_FAST_MODE_FREQ;
|
||||
dev_warn(priv->dev, "use max freq %d instead\n",
|
||||
HIX5I2C_MAX_FREQ);
|
||||
I2C_MAX_FAST_MODE_FREQ);
|
||||
} else {
|
||||
priv->freq = freq;
|
||||
}
|
||||
|
@ -304,7 +304,7 @@ static struct img_i2c_timings timings[] = {
|
||||
/* Standard mode */
|
||||
{
|
||||
.name = "standard",
|
||||
.max_bitrate = 100000,
|
||||
.max_bitrate = I2C_MAX_STANDARD_MODE_FREQ,
|
||||
.tckh = 4000,
|
||||
.tckl = 4700,
|
||||
.tsdh = 4700,
|
||||
@ -316,7 +316,7 @@ static struct img_i2c_timings timings[] = {
|
||||
/* Fast mode */
|
||||
{
|
||||
.name = "fast",
|
||||
.max_bitrate = 400000,
|
||||
.max_bitrate = I2C_MAX_FAST_MODE_FREQ,
|
||||
.tckh = 600,
|
||||
.tckl = 1300,
|
||||
.tsdh = 600,
|
||||
|
@ -75,12 +75,6 @@
|
||||
#define I2C_CLK_RATIO 2
|
||||
#define CHUNK_DATA 256
|
||||
|
||||
#define LPI2C_DEFAULT_RATE 100000
|
||||
#define STARDARD_MAX_BITRATE 400000
|
||||
#define FAST_MAX_BITRATE 1000000
|
||||
#define FAST_PLUS_MAX_BITRATE 3400000
|
||||
#define HIGHSPEED_MAX_BITRATE 5000000
|
||||
|
||||
#define I2C_PM_TIMEOUT 10 /* ms */
|
||||
|
||||
enum lpi2c_imx_mode {
|
||||
@ -152,13 +146,13 @@ static void lpi2c_imx_set_mode(struct lpi2c_imx_struct *lpi2c_imx)
|
||||
unsigned int bitrate = lpi2c_imx->bitrate;
|
||||
enum lpi2c_imx_mode mode;
|
||||
|
||||
if (bitrate < STARDARD_MAX_BITRATE)
|
||||
if (bitrate < I2C_MAX_FAST_MODE_FREQ)
|
||||
mode = STANDARD;
|
||||
else if (bitrate < FAST_MAX_BITRATE)
|
||||
else if (bitrate < I2C_MAX_FAST_MODE_PLUS_FREQ)
|
||||
mode = FAST;
|
||||
else if (bitrate < FAST_PLUS_MAX_BITRATE)
|
||||
else if (bitrate < I2C_MAX_HIGH_SPEED_MODE_FREQ)
|
||||
mode = FAST_PLUS;
|
||||
else if (bitrate < HIGHSPEED_MAX_BITRATE)
|
||||
else if (bitrate < I2C_MAX_ULTRA_FAST_MODE_FREQ)
|
||||
mode = HS;
|
||||
else
|
||||
mode = ULTRA_FAST;
|
||||
@ -578,7 +572,7 @@ static int lpi2c_imx_probe(struct platform_device *pdev)
|
||||
ret = of_property_read_u32(pdev->dev.of_node,
|
||||
"clock-frequency", &lpi2c_imx->bitrate);
|
||||
if (ret)
|
||||
lpi2c_imx->bitrate = LPI2C_DEFAULT_RATE;
|
||||
lpi2c_imx->bitrate = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
|
||||
ret = devm_request_irq(&pdev->dev, irq, lpi2c_imx_isr, 0,
|
||||
pdev->name, lpi2c_imx);
|
||||
|
@ -50,9 +50,6 @@
|
||||
/* This will be the driver name the kernel reports */
|
||||
#define DRIVER_NAME "imx-i2c"
|
||||
|
||||
/* Default value */
|
||||
#define IMX_I2C_BIT_RATE 100000 /* 100kHz */
|
||||
|
||||
/*
|
||||
* Enable DMA if transfer byte size is bigger than this threshold.
|
||||
* As the hardware request, it must bigger than 4 bytes.\
|
||||
@ -1201,7 +1198,7 @@ static int i2c_imx_probe(struct platform_device *pdev)
|
||||
goto rpm_disable;
|
||||
|
||||
/* Set up clock divider */
|
||||
i2c_imx->bitrate = IMX_I2C_BIT_RATE;
|
||||
i2c_imx->bitrate = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
ret = of_property_read_u32(pdev->dev.of_node,
|
||||
"clock-frequency", &i2c_imx->bitrate);
|
||||
if (ret < 0 && pdata && pdata->bitrate)
|
||||
|
@ -396,7 +396,7 @@ static int i2c_lpc2k_probe(struct platform_device *pdev)
|
||||
ret = of_property_read_u32(pdev->dev.of_node, "clock-frequency",
|
||||
&bus_clk_rate);
|
||||
if (ret)
|
||||
bus_clk_rate = 100000; /* 100 kHz default clock rate */
|
||||
bus_clk_rate = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
|
||||
clkrate = clk_get_rate(i2c->clk);
|
||||
if (clkrate == 0) {
|
||||
@ -407,9 +407,9 @@ static int i2c_lpc2k_probe(struct platform_device *pdev)
|
||||
|
||||
/* Setup I2C dividers to generate clock with proper duty cycle */
|
||||
clkrate = clkrate / bus_clk_rate;
|
||||
if (bus_clk_rate <= 100000)
|
||||
if (bus_clk_rate <= I2C_MAX_STANDARD_MODE_FREQ)
|
||||
scl_high = (clkrate * I2C_STD_MODE_DUTY) / 100;
|
||||
else if (bus_clk_rate <= 400000)
|
||||
else if (bus_clk_rate <= I2C_MAX_FAST_MODE_FREQ)
|
||||
scl_high = (clkrate * I2C_FAST_MODE_DUTY) / 100;
|
||||
else
|
||||
scl_high = (clkrate * I2C_FAST_MODE_PLUS_DUTY) / 100;
|
||||
|
@ -56,9 +56,6 @@
|
||||
#define I2C_DMA_4G_MODE 0x0001
|
||||
|
||||
#define I2C_DEFAULT_CLK_DIV 5
|
||||
#define I2C_DEFAULT_SPEED 100000 /* hz */
|
||||
#define MAX_FS_MODE_SPEED 400000
|
||||
#define MAX_HS_MODE_SPEED 3400000
|
||||
#define MAX_SAMPLE_CNT_DIV 8
|
||||
#define MAX_STEP_CNT_DIV 64
|
||||
#define MAX_HS_STEP_CNT_DIV 8
|
||||
@ -450,10 +447,10 @@ static int mtk_i2c_calculate_speed(struct mtk_i2c *i2c, unsigned int clk_src,
|
||||
unsigned int best_mul;
|
||||
unsigned int cnt_mul;
|
||||
|
||||
if (target_speed > MAX_HS_MODE_SPEED)
|
||||
target_speed = MAX_HS_MODE_SPEED;
|
||||
if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ)
|
||||
target_speed = I2C_MAX_FAST_MODE_PLUS_FREQ;
|
||||
|
||||
if (target_speed > MAX_FS_MODE_SPEED)
|
||||
if (target_speed > I2C_MAX_FAST_MODE_FREQ)
|
||||
max_step_cnt = MAX_HS_STEP_CNT_DIV;
|
||||
else
|
||||
max_step_cnt = MAX_STEP_CNT_DIV;
|
||||
@ -514,9 +511,9 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
|
||||
clk_src = parent_clk / i2c->clk_src_div;
|
||||
target_speed = i2c->speed_hz;
|
||||
|
||||
if (target_speed > MAX_FS_MODE_SPEED) {
|
||||
if (target_speed > I2C_MAX_FAST_MODE_FREQ) {
|
||||
/* Set master code speed register */
|
||||
ret = mtk_i2c_calculate_speed(i2c, clk_src, MAX_FS_MODE_SPEED,
|
||||
ret = mtk_i2c_calculate_speed(i2c, clk_src, I2C_MAX_FAST_MODE_FREQ,
|
||||
&l_step_cnt, &l_sample_cnt);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
@ -581,7 +578,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
|
||||
|
||||
control_reg = mtk_i2c_readw(i2c, OFFSET_CONTROL) &
|
||||
~(I2C_CONTROL_DIR_CHANGE | I2C_CONTROL_RS);
|
||||
if ((i2c->speed_hz > MAX_FS_MODE_SPEED) || (left_num >= 1))
|
||||
if ((i2c->speed_hz > I2C_MAX_FAST_MODE_FREQ) || (left_num >= 1))
|
||||
control_reg |= I2C_CONTROL_RS;
|
||||
|
||||
if (i2c->op == I2C_MASTER_WRRD)
|
||||
@ -590,7 +587,7 @@ static int mtk_i2c_do_transfer(struct mtk_i2c *i2c, struct i2c_msg *msgs,
|
||||
mtk_i2c_writew(i2c, control_reg, OFFSET_CONTROL);
|
||||
|
||||
/* set start condition */
|
||||
if (i2c->speed_hz <= I2C_DEFAULT_SPEED)
|
||||
if (i2c->speed_hz <= I2C_MAX_STANDARD_MODE_FREQ)
|
||||
mtk_i2c_writew(i2c, I2C_ST_START_CON, OFFSET_EXT_CONF);
|
||||
else
|
||||
mtk_i2c_writew(i2c, I2C_FS_START_CON, OFFSET_EXT_CONF);
|
||||
@ -798,7 +795,7 @@ static int mtk_i2c_transfer(struct i2c_adapter *adap,
|
||||
}
|
||||
}
|
||||
|
||||
if (i2c->auto_restart && num >= 2 && i2c->speed_hz > MAX_FS_MODE_SPEED)
|
||||
if (i2c->auto_restart && num >= 2 && i2c->speed_hz > I2C_MAX_FAST_MODE_FREQ)
|
||||
/* ignore the first restart irq after the master code,
|
||||
* otherwise the first transfer will be discarded.
|
||||
*/
|
||||
@ -893,7 +890,7 @@ static int mtk_i2c_parse_dt(struct device_node *np, struct mtk_i2c *i2c)
|
||||
|
||||
ret = of_property_read_u32(np, "clock-frequency", &i2c->speed_hz);
|
||||
if (ret < 0)
|
||||
i2c->speed_hz = I2C_DEFAULT_SPEED;
|
||||
i2c->speed_hz = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
|
||||
ret = of_property_read_u32(np, "clock-div", &i2c->clk_src_div);
|
||||
if (ret < 0)
|
||||
|
@ -300,7 +300,7 @@ static int mtk_i2c_probe(struct platform_device *pdev)
|
||||
|
||||
if (of_property_read_u32(pdev->dev.of_node, "clock-frequency",
|
||||
&i2c->bus_freq))
|
||||
i2c->bus_freq = 100000;
|
||||
i2c->bus_freq = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
|
||||
if (i2c->bus_freq == 0) {
|
||||
dev_warn(i2c->dev, "clock-frequency 0 not supported\n");
|
||||
|
@ -810,7 +810,7 @@ mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data,
|
||||
tclk = clk_get_rate(drv_data->clk);
|
||||
|
||||
if (of_property_read_u32(np, "clock-frequency", &bus_freq))
|
||||
bus_freq = 100000; /* 100kHz by default */
|
||||
bus_freq = I2C_MAX_STANDARD_MODE_FREQ; /* 100kHz by default */
|
||||
|
||||
if (of_device_is_compatible(np, "allwinner,sun4i-a10-i2c") ||
|
||||
of_device_is_compatible(np, "allwinner,sun6i-a31-i2c"))
|
||||
@ -846,14 +846,14 @@ mv64xxx_of_config(struct mv64xxx_i2c_data *drv_data,
|
||||
if (of_device_is_compatible(np, "marvell,mv78230-i2c")) {
|
||||
drv_data->offload_enabled = true;
|
||||
/* The delay is only needed in standard mode (100kHz) */
|
||||
if (bus_freq <= 100000)
|
||||
if (bus_freq <= I2C_MAX_STANDARD_MODE_FREQ)
|
||||
drv_data->errata_delay = true;
|
||||
}
|
||||
|
||||
if (of_device_is_compatible(np, "marvell,mv78230-a0-i2c")) {
|
||||
drv_data->offload_enabled = false;
|
||||
/* The delay is only needed in standard mode (100kHz) */
|
||||
if (bus_freq <= 100000)
|
||||
if (bus_freq <= I2C_MAX_STANDARD_MODE_FREQ)
|
||||
drv_data->errata_delay = true;
|
||||
}
|
||||
|
||||
|
@ -731,7 +731,7 @@ static void mxs_i2c_derive_timing(struct mxs_i2c_dev *i2c, uint32_t speed)
|
||||
* This is compensated for by subtracting the respective constants
|
||||
* from the values written to the timing registers.
|
||||
*/
|
||||
if (speed > 100000) {
|
||||
if (speed > I2C_MAX_STANDARD_MODE_FREQ) {
|
||||
/* fast mode */
|
||||
low_count = DIV_ROUND_CLOSEST(divider * 13, (13 + 6));
|
||||
high_count = DIV_ROUND_CLOSEST(divider * 6, (13 + 6));
|
||||
@ -769,7 +769,7 @@ static int mxs_i2c_get_ofdata(struct mxs_i2c_dev *i2c)
|
||||
ret = of_property_read_u32(node, "clock-frequency", &speed);
|
||||
if (ret) {
|
||||
dev_warn(dev, "No I2C speed selected, using 100kHz\n");
|
||||
speed = 100000;
|
||||
speed = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
}
|
||||
|
||||
mxs_i2c_derive_timing(i2c, speed);
|
||||
|
@ -396,7 +396,7 @@ static void setup_i2c_controller(struct nmk_i2c_dev *dev)
|
||||
* 2 whereas it is 3 for fast and fastplus mode of
|
||||
* operation. TODO - high speed support.
|
||||
*/
|
||||
div = (dev->clk_freq > 100000) ? 3 : 2;
|
||||
div = (dev->clk_freq > I2C_MAX_STANDARD_MODE_FREQ) ? 3 : 2;
|
||||
|
||||
/*
|
||||
* generate the mask for baud rate counters. The controller
|
||||
@ -420,7 +420,7 @@ static void setup_i2c_controller(struct nmk_i2c_dev *dev)
|
||||
if (dev->sm > I2C_FREQ_MODE_FAST) {
|
||||
dev_err(&dev->adev->dev,
|
||||
"do not support this mode defaulting to std. mode\n");
|
||||
brcr2 = i2c_clk/(100000 * 2) & 0xffff;
|
||||
brcr2 = i2c_clk / (I2C_MAX_STANDARD_MODE_FREQ * 2) & 0xffff;
|
||||
writel((brcr1 | brcr2), dev->virtbase + I2C_BRCR);
|
||||
writel(I2C_FREQ_MODE_STANDARD << 4,
|
||||
dev->virtbase + I2C_CR);
|
||||
@ -949,10 +949,10 @@ static void nmk_i2c_of_probe(struct device_node *np,
|
||||
{
|
||||
/* Default to 100 kHz if no frequency is given in the node */
|
||||
if (of_property_read_u32(np, "clock-frequency", &nmk->clk_freq))
|
||||
nmk->clk_freq = 100000;
|
||||
nmk->clk_freq = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
|
||||
/* This driver only supports 'standard' and 'fast' modes of operation. */
|
||||
if (nmk->clk_freq <= 100000)
|
||||
if (nmk->clk_freq <= I2C_MAX_STANDARD_MODE_FREQ)
|
||||
nmk->sm = I2C_FREQ_MODE_STANDARD;
|
||||
else
|
||||
nmk->sm = I2C_FREQ_MODE_FAST;
|
||||
|
@ -1380,7 +1380,7 @@ omap_i2c_probe(struct platform_device *pdev)
|
||||
|
||||
match = of_match_device(of_match_ptr(omap_i2c_of_match), &pdev->dev);
|
||||
if (match) {
|
||||
u32 freq = 100000; /* default to 100000 Hz */
|
||||
u32 freq = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
|
||||
pdata = match->data;
|
||||
omap->flags = pdata->flags;
|
||||
|
@ -87,9 +87,6 @@
|
||||
|
||||
#define OWL_I2C_MAX_RETRIES 50
|
||||
|
||||
#define OWL_I2C_DEF_SPEED_HZ 100000
|
||||
#define OWL_I2C_MAX_SPEED_HZ 400000
|
||||
|
||||
struct owl_i2c_dev {
|
||||
struct i2c_adapter adap;
|
||||
struct i2c_msg *msg;
|
||||
@ -419,11 +416,11 @@ static int owl_i2c_probe(struct platform_device *pdev)
|
||||
|
||||
if (of_property_read_u32(dev->of_node, "clock-frequency",
|
||||
&i2c_dev->bus_freq))
|
||||
i2c_dev->bus_freq = OWL_I2C_DEF_SPEED_HZ;
|
||||
i2c_dev->bus_freq = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
|
||||
/* We support only frequencies of 100k and 400k for now */
|
||||
if (i2c_dev->bus_freq != OWL_I2C_DEF_SPEED_HZ &&
|
||||
i2c_dev->bus_freq != OWL_I2C_MAX_SPEED_HZ) {
|
||||
if (i2c_dev->bus_freq != I2C_MAX_STANDARD_MODE_FREQ &&
|
||||
i2c_dev->bus_freq != I2C_MAX_FAST_MODE_FREQ) {
|
||||
dev_err(dev, "invalid clock-frequency %d\n", i2c_dev->bus_freq);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
@ -136,13 +136,8 @@
|
||||
*/
|
||||
#define TOUT_MIN 2
|
||||
|
||||
/* I2C Frequency Modes */
|
||||
#define I2C_STANDARD_FREQ 100000
|
||||
#define I2C_FAST_MODE_FREQ 400000
|
||||
#define I2C_FAST_MODE_PLUS_FREQ 1000000
|
||||
|
||||
/* Default values. Use these if FW query fails */
|
||||
#define DEFAULT_CLK_FREQ I2C_STANDARD_FREQ
|
||||
#define DEFAULT_CLK_FREQ I2C_MAX_STANDARD_MODE_FREQ
|
||||
#define DEFAULT_SRC_CLK 20000000
|
||||
|
||||
/*
|
||||
@ -1756,7 +1751,7 @@ static int qup_i2c_probe(struct platform_device *pdev)
|
||||
|
||||
nodma:
|
||||
/* We support frequencies up to FAST Mode Plus (1MHz) */
|
||||
if (!clk_freq || clk_freq > I2C_FAST_MODE_PLUS_FREQ) {
|
||||
if (!clk_freq || clk_freq > I2C_MAX_FAST_MODE_PLUS_FREQ) {
|
||||
dev_err(qup->dev, "clock frequency not supported %d\n",
|
||||
clk_freq);
|
||||
return -EINVAL;
|
||||
@ -1861,7 +1856,7 @@ nodma:
|
||||
qup->in_fifo_sz = qup->in_blk_sz * (2 << size);
|
||||
|
||||
hs_div = 3;
|
||||
if (clk_freq <= I2C_STANDARD_FREQ) {
|
||||
if (clk_freq <= I2C_MAX_STANDARD_MODE_FREQ) {
|
||||
fs_div = ((src_clk_freq / clk_freq) / 2) - 3;
|
||||
qup->clk_ctl = (hs_div << 8) | (fs_div & 0xff);
|
||||
} else {
|
||||
|
@ -287,10 +287,10 @@ static int riic_init_hw(struct riic_dev *riic, struct i2c_timings *t)
|
||||
|
||||
pm_runtime_get_sync(riic->adapter.dev.parent);
|
||||
|
||||
if (t->bus_freq_hz > 400000) {
|
||||
if (t->bus_freq_hz > I2C_MAX_FAST_MODE_FREQ) {
|
||||
dev_err(&riic->adapter.dev,
|
||||
"unsupported bus speed (%dHz). 400000 max\n",
|
||||
t->bus_freq_hz);
|
||||
"unsupported bus speed (%dHz). %d max\n",
|
||||
t->bus_freq_hz, I2C_MAX_FAST_MODE_FREQ);
|
||||
ret = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
@ -539,9 +539,9 @@ out:
|
||||
*/
|
||||
static const struct i2c_spec_values *rk3x_i2c_get_spec(unsigned int speed)
|
||||
{
|
||||
if (speed <= 100000)
|
||||
if (speed <= I2C_MAX_STANDARD_MODE_FREQ)
|
||||
return &standard_mode_spec;
|
||||
else if (speed <= 400000)
|
||||
else if (speed <= I2C_MAX_FAST_MODE_FREQ)
|
||||
return &fast_mode_spec;
|
||||
else
|
||||
return &fast_mode_plus_spec;
|
||||
@ -578,8 +578,8 @@ static int rk3x_i2c_v0_calc_timings(unsigned long clk_rate,
|
||||
int ret = 0;
|
||||
|
||||
/* Only support standard-mode and fast-mode */
|
||||
if (WARN_ON(t->bus_freq_hz > 400000))
|
||||
t->bus_freq_hz = 400000;
|
||||
if (WARN_ON(t->bus_freq_hz > I2C_MAX_FAST_MODE_FREQ))
|
||||
t->bus_freq_hz = I2C_MAX_FAST_MODE_FREQ;
|
||||
|
||||
/* prevent scl_rate_khz from becoming 0 */
|
||||
if (WARN_ON(t->bus_freq_hz < 1000))
|
||||
@ -758,8 +758,8 @@ static int rk3x_i2c_v1_calc_timings(unsigned long clk_rate,
|
||||
int ret = 0;
|
||||
|
||||
/* Support standard-mode, fast-mode and fast-mode plus */
|
||||
if (WARN_ON(t->bus_freq_hz > 1000000))
|
||||
t->bus_freq_hz = 1000000;
|
||||
if (WARN_ON(t->bus_freq_hz > I2C_MAX_FAST_MODE_PLUS_FREQ))
|
||||
t->bus_freq_hz = I2C_MAX_FAST_MODE_PLUS_FREQ;
|
||||
|
||||
/* prevent scl_rate_khz from becoming 0 */
|
||||
if (WARN_ON(t->bus_freq_hz < 1000))
|
||||
|
@ -839,7 +839,7 @@ static int s3c24xx_i2c_clockrate(struct s3c24xx_i2c *i2c, unsigned int *got)
|
||||
|
||||
dev_dbg(i2c->dev, "pdata desired frequency %lu\n", pdata->frequency);
|
||||
|
||||
target_frequency = pdata->frequency ? pdata->frequency : 100000;
|
||||
target_frequency = pdata->frequency ?: I2C_MAX_STANDARD_MODE_FREQ;
|
||||
|
||||
target_frequency /= 1000; /* Target frequency now in KHz */
|
||||
|
||||
|
@ -145,9 +145,6 @@ struct sh_mobile_dt_config {
|
||||
|
||||
#define IIC_FLAG_HAS_ICIC67 (1 << 0)
|
||||
|
||||
#define STANDARD_MODE 100000
|
||||
#define FAST_MODE 400000
|
||||
|
||||
/* Register offsets */
|
||||
#define ICDR 0x00
|
||||
#define ICCR 0x04
|
||||
@ -270,11 +267,11 @@ static int sh_mobile_i2c_init(struct sh_mobile_i2c_data *pd)
|
||||
|
||||
i2c_clk_khz = clk_get_rate(pd->clk) / 1000 / pd->clks_per_count;
|
||||
|
||||
if (pd->bus_speed == STANDARD_MODE) {
|
||||
if (pd->bus_speed == I2C_MAX_STANDARD_MODE_FREQ) {
|
||||
tLOW = 47; /* tLOW = 4.7 us */
|
||||
tHIGH = 40; /* tHD;STA = tHIGH = 4.0 us */
|
||||
tf = 3; /* tf = 0.3 us */
|
||||
} else if (pd->bus_speed == FAST_MODE) {
|
||||
} else if (pd->bus_speed == I2C_MAX_FAST_MODE_FREQ) {
|
||||
tLOW = 13; /* tLOW = 1.3 us */
|
||||
tHIGH = 6; /* tHD;STA = tHIGH = 0.6 us */
|
||||
tf = 3; /* tf = 0.3 us */
|
||||
@ -851,7 +848,7 @@ static int sh_mobile_i2c_probe(struct platform_device *dev)
|
||||
return PTR_ERR(pd->reg);
|
||||
|
||||
ret = of_property_read_u32(dev->dev.of_node, "clock-frequency", &bus_speed);
|
||||
pd->bus_speed = (ret || !bus_speed) ? STANDARD_MODE : bus_speed;
|
||||
pd->bus_speed = (ret || !bus_speed) ? I2C_MAX_STANDARD_MODE_FREQ : bus_speed;
|
||||
pd->clks_per_count = 1;
|
||||
|
||||
/* Newer variants come with two new bits in ICIC */
|
||||
|
@ -62,7 +62,6 @@
|
||||
#define SIRFSOC_I2C_STOP BIT(6)
|
||||
#define SIRFSOC_I2C_START BIT(7)
|
||||
|
||||
#define SIRFSOC_I2C_DEFAULT_SPEED 100000
|
||||
#define SIRFSOC_I2C_ERR_NOACK 1
|
||||
#define SIRFSOC_I2C_ERR_TIMEOUT 2
|
||||
|
||||
@ -353,7 +352,7 @@ static int i2c_sirfsoc_probe(struct platform_device *pdev)
|
||||
err = of_property_read_u32(pdev->dev.of_node,
|
||||
"clock-frequency", &bitrate);
|
||||
if (err < 0)
|
||||
bitrate = SIRFSOC_I2C_DEFAULT_SPEED;
|
||||
bitrate = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
|
||||
/*
|
||||
* Due to some hardware design issues, we need to tune the formula.
|
||||
|
@ -337,9 +337,9 @@ static void sprd_i2c_set_clk(struct sprd_i2c *i2c_dev, u32 freq)
|
||||
writel(div1, i2c_dev->base + ADDR_DVD1);
|
||||
|
||||
/* Start hold timing = hold time(us) * source clock */
|
||||
if (freq == 400000)
|
||||
if (freq == I2C_MAX_FAST_MODE_FREQ)
|
||||
writel((6 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD);
|
||||
else if (freq == 100000)
|
||||
else if (freq == I2C_MAX_STANDARD_MODE_FREQ)
|
||||
writel((4 * apb_clk) / 1000000, i2c_dev->base + ADDR_STA0_DVD);
|
||||
}
|
||||
|
||||
@ -502,7 +502,7 @@ static int sprd_i2c_probe(struct platform_device *pdev)
|
||||
snprintf(i2c_dev->adap.name, sizeof(i2c_dev->adap.name),
|
||||
"%s", "sprd-i2c");
|
||||
|
||||
i2c_dev->bus_freq = 100000;
|
||||
i2c_dev->bus_freq = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
i2c_dev->adap.owner = THIS_MODULE;
|
||||
i2c_dev->dev = dev;
|
||||
i2c_dev->adap.retries = 3;
|
||||
@ -516,7 +516,8 @@ static int sprd_i2c_probe(struct platform_device *pdev)
|
||||
i2c_dev->bus_freq = prop;
|
||||
|
||||
/* We only support 100k and 400k now, otherwise will return error. */
|
||||
if (i2c_dev->bus_freq != 100000 && i2c_dev->bus_freq != 400000)
|
||||
if (i2c_dev->bus_freq != I2C_MAX_STANDARD_MODE_FREQ &&
|
||||
i2c_dev->bus_freq != I2C_MAX_FAST_MODE_FREQ)
|
||||
return -EINVAL;
|
||||
|
||||
ret = sprd_i2c_clk_init(i2c_dev);
|
||||
|
@ -213,7 +213,7 @@ static inline void st_i2c_clr_bits(void __iomem *reg, u32 mask)
|
||||
*/
|
||||
static struct st_i2c_timings i2c_timings[] = {
|
||||
[I2C_MODE_STANDARD] = {
|
||||
.rate = 100000,
|
||||
.rate = I2C_MAX_STANDARD_MODE_FREQ,
|
||||
.rep_start_hold = 4400,
|
||||
.rep_start_setup = 5170,
|
||||
.start_hold = 4400,
|
||||
@ -222,7 +222,7 @@ static struct st_i2c_timings i2c_timings[] = {
|
||||
.bus_free_time = 5170,
|
||||
},
|
||||
[I2C_MODE_FAST] = {
|
||||
.rate = 400000,
|
||||
.rate = I2C_MAX_FAST_MODE_FREQ,
|
||||
.rep_start_hold = 660,
|
||||
.rep_start_setup = 660,
|
||||
.start_hold = 660,
|
||||
@ -835,7 +835,7 @@ static int st_i2c_probe(struct platform_device *pdev)
|
||||
|
||||
i2c_dev->mode = I2C_MODE_STANDARD;
|
||||
ret = of_property_read_u32(np, "clock-frequency", &clk_rate);
|
||||
if ((!ret) && (clk_rate == 400000))
|
||||
if (!ret && (clk_rate == I2C_MAX_FAST_MODE_FREQ))
|
||||
i2c_dev->mode = I2C_MODE_FAST;
|
||||
|
||||
i2c_dev->dev = &pdev->dev;
|
||||
|
@ -232,10 +232,10 @@ static void stm32f4_i2c_set_speed_mode(struct stm32f4_i2c_dev *i2c_dev)
|
||||
* In standard mode:
|
||||
* t_scl_high = t_scl_low = CCR * I2C parent clk period
|
||||
* So to reach 100 kHz, we have:
|
||||
* CCR = I2C parent rate / 100 kHz >> 1
|
||||
* CCR = I2C parent rate / (100 kHz * 2)
|
||||
*
|
||||
* For example with parent rate = 2 MHz:
|
||||
* CCR = 2000000 / (100000 << 1) = 10
|
||||
* CCR = 2000000 / (100000 * 2) = 10
|
||||
* t_scl_high = t_scl_low = 10 * (1 / 2000000) = 5000 ns
|
||||
* t_scl_high + t_scl_low = 10000 ns so 100 kHz is reached
|
||||
*
|
||||
@ -243,7 +243,7 @@ static void stm32f4_i2c_set_speed_mode(struct stm32f4_i2c_dev *i2c_dev)
|
||||
* parent rate is not higher than 46 MHz . As a result val
|
||||
* is at most 8 bits wide and so fits into the CCR bits [11:0].
|
||||
*/
|
||||
val = i2c_dev->parent_rate / (100000 << 1);
|
||||
val = i2c_dev->parent_rate / (I2C_MAX_STANDARD_MODE_FREQ * 2);
|
||||
} else {
|
||||
/*
|
||||
* In fast mode, we compute CCR with duty = 0 as with low
|
||||
@ -263,7 +263,7 @@ static void stm32f4_i2c_set_speed_mode(struct stm32f4_i2c_dev *i2c_dev)
|
||||
* parent rate is not higher than 46 MHz . As a result val
|
||||
* is at most 6 bits wide and so fits into the CCR bits [11:0].
|
||||
*/
|
||||
val = DIV_ROUND_UP(i2c_dev->parent_rate, 400000 * 3);
|
||||
val = DIV_ROUND_UP(i2c_dev->parent_rate, I2C_MAX_FAST_MODE_FREQ * 3);
|
||||
|
||||
/* Select Fast mode */
|
||||
ccr |= STM32F4_I2C_CCR_FS;
|
||||
@ -807,7 +807,7 @@ static int stm32f4_i2c_probe(struct platform_device *pdev)
|
||||
|
||||
i2c_dev->speed = STM32_I2C_SPEED_STANDARD;
|
||||
ret = of_property_read_u32(np, "clock-frequency", &clk_rate);
|
||||
if (!ret && clk_rate >= 400000)
|
||||
if (!ret && clk_rate >= I2C_MAX_FAST_MODE_FREQ)
|
||||
i2c_dev->speed = STM32_I2C_SPEED_FAST;
|
||||
|
||||
i2c_dev->dev = &pdev->dev;
|
||||
|
@ -132,7 +132,7 @@ enum stu300_error {
|
||||
#define NUM_ADDR_RESEND_ATTEMPTS 12
|
||||
|
||||
/* I2C clock speed, in Hz 0-400kHz*/
|
||||
static unsigned int scl_frequency = 100000;
|
||||
static unsigned int scl_frequency = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
module_param(scl_frequency, uint, 0644);
|
||||
|
||||
/**
|
||||
@ -497,7 +497,7 @@ static int stu300_set_clk(struct stu300_dev *dev, unsigned long clkrate)
|
||||
dev_dbg(&dev->pdev->dev, "Clock rate %lu Hz, I2C bus speed %d Hz "
|
||||
"virtbase %p\n", clkrate, dev->speed, dev->virtbase);
|
||||
|
||||
if (dev->speed > 100000)
|
||||
if (dev->speed > I2C_MAX_STANDARD_MODE_FREQ)
|
||||
/* Fast Mode I2C */
|
||||
val = ((clkrate/dev->speed) - 9)/3 + 1;
|
||||
else
|
||||
@ -518,7 +518,7 @@ static int stu300_set_clk(struct stu300_dev *dev, unsigned long clkrate)
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (dev->speed > 100000) {
|
||||
if (dev->speed > I2C_MAX_STANDARD_MODE_FREQ) {
|
||||
/* CC6..CC0 */
|
||||
stu300_wr8((val & I2C_CCR_CC_MASK) | I2C_CCR_FMSM,
|
||||
dev->virtbase + I2C_CCR);
|
||||
|
@ -186,7 +186,7 @@ static int p2wi_probe(struct platform_device *pdev)
|
||||
struct device_node *np = dev->of_node;
|
||||
struct device_node *childnp;
|
||||
unsigned long parent_clk_freq;
|
||||
u32 clk_freq = 100000;
|
||||
u32 clk_freq = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
struct resource *r;
|
||||
struct p2wi *p2wi;
|
||||
u32 slave_addr;
|
||||
|
@ -67,10 +67,10 @@
|
||||
|
||||
/* STANDARD MODE frequency */
|
||||
#define SYNQUACER_I2C_CLK_MASTER_STD(rate) \
|
||||
DIV_ROUND_UP(DIV_ROUND_UP((rate), 100000) - 2, 2)
|
||||
DIV_ROUND_UP(DIV_ROUND_UP((rate), I2C_MAX_STANDARD_MODE_FREQ) - 2, 2)
|
||||
/* FAST MODE frequency */
|
||||
#define SYNQUACER_I2C_CLK_MASTER_FAST(rate) \
|
||||
DIV_ROUND_UP((DIV_ROUND_UP((rate), 400000) - 2) * 2, 3)
|
||||
DIV_ROUND_UP((DIV_ROUND_UP((rate), I2C_MAX_FAST_MODE_FREQ) - 2) * 2, 3)
|
||||
|
||||
/* (clkrate <= 18000000) */
|
||||
/* calculate the value of CS bits in CCR register on standard mode */
|
||||
@ -602,7 +602,7 @@ static int synquacer_i2c_probe(struct platform_device *pdev)
|
||||
i2c->adapter.nr = pdev->id;
|
||||
init_completion(&i2c->completion);
|
||||
|
||||
if (bus_speed < 400000)
|
||||
if (bus_speed < I2C_MAX_FAST_MODE_FREQ)
|
||||
i2c->speed_khz = SYNQUACER_I2C_SPEED_SM;
|
||||
else
|
||||
i2c->speed_khz = SYNQUACER_I2C_SPEED_FM;
|
||||
|
@ -123,10 +123,6 @@
|
||||
#define I2C_THIGH_SHIFT 8
|
||||
#define I2C_INTERFACE_TIMING_1 0x98
|
||||
|
||||
#define I2C_STANDARD_MODE 100000
|
||||
#define I2C_FAST_MODE 400000
|
||||
#define I2C_FAST_PLUS_MODE 1000000
|
||||
|
||||
/* Packet header size in bytes */
|
||||
#define I2C_PACKET_HEADER_SIZE 12
|
||||
|
||||
@ -737,8 +733,8 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_dev, bool clk_reinit)
|
||||
I2C_CLK_DIVISOR_STD_FAST_MODE_SHIFT;
|
||||
i2c_writel(i2c_dev, clk_divisor, I2C_CLK_DIVISOR);
|
||||
|
||||
if (i2c_dev->bus_clk_rate > I2C_STANDARD_MODE &&
|
||||
i2c_dev->bus_clk_rate <= I2C_FAST_PLUS_MODE) {
|
||||
if (i2c_dev->bus_clk_rate > I2C_MAX_STANDARD_MODE_FREQ &&
|
||||
i2c_dev->bus_clk_rate <= I2C_MAX_FAST_MODE_PLUS_FREQ) {
|
||||
tlow = i2c_dev->hw->tlow_fast_fastplus_mode;
|
||||
thigh = i2c_dev->hw->thigh_fast_fastplus_mode;
|
||||
tsu_thd = i2c_dev->hw->setup_hold_time_fast_fast_plus_mode;
|
||||
@ -1341,7 +1337,7 @@ static void tegra_i2c_parse_dt(struct tegra_i2c_dev *i2c_dev)
|
||||
ret = of_property_read_u32(np, "clock-frequency",
|
||||
&i2c_dev->bus_clk_rate);
|
||||
if (ret)
|
||||
i2c_dev->bus_clk_rate = 100000; /* default clock rate */
|
||||
i2c_dev->bus_clk_rate = I2C_MAX_STANDARD_MODE_FREQ; /* default clock rate */
|
||||
|
||||
multi_mode = of_property_read_bool(np, "multi-master");
|
||||
i2c_dev->is_multimaster_mode = multi_mode;
|
||||
@ -1640,12 +1636,12 @@ static int tegra_i2c_probe(struct platform_device *pdev)
|
||||
}
|
||||
}
|
||||
|
||||
if (i2c_dev->bus_clk_rate > I2C_FAST_MODE &&
|
||||
i2c_dev->bus_clk_rate <= I2C_FAST_PLUS_MODE)
|
||||
if (i2c_dev->bus_clk_rate > I2C_MAX_FAST_MODE_FREQ &&
|
||||
i2c_dev->bus_clk_rate <= I2C_MAX_FAST_MODE_PLUS_FREQ)
|
||||
i2c_dev->clk_divisor_non_hs_mode =
|
||||
i2c_dev->hw->clk_divisor_fast_plus_mode;
|
||||
else if (i2c_dev->bus_clk_rate > I2C_STANDARD_MODE &&
|
||||
i2c_dev->bus_clk_rate <= I2C_FAST_MODE)
|
||||
else if (i2c_dev->bus_clk_rate > I2C_MAX_STANDARD_MODE_FREQ &&
|
||||
i2c_dev->bus_clk_rate <= I2C_MAX_FAST_MODE_FREQ)
|
||||
i2c_dev->clk_divisor_non_hs_mode =
|
||||
i2c_dev->hw->clk_divisor_fast_mode;
|
||||
else
|
||||
|
@ -183,7 +183,7 @@ static int thunder_i2c_probe_pci(struct pci_dev *pdev,
|
||||
thunder_i2c_clock_enable(dev, i2c);
|
||||
ret = device_property_read_u32(dev, "clock-frequency", &i2c->twsi_freq);
|
||||
if (ret)
|
||||
i2c->twsi_freq = 100000;
|
||||
i2c->twsi_freq = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
|
||||
init_waitqueue_head(&i2c->queue);
|
||||
|
||||
|
@ -73,8 +73,6 @@
|
||||
#define UNIPHIER_FI2C_BYTE_WISE BIT(3)
|
||||
#define UNIPHIER_FI2C_DEFER_STOP_COMP BIT(4)
|
||||
|
||||
#define UNIPHIER_FI2C_DEFAULT_SPEED 100000
|
||||
#define UNIPHIER_FI2C_MAX_SPEED 400000
|
||||
#define UNIPHIER_FI2C_FIFO_SIZE 8
|
||||
|
||||
struct uniphier_fi2c_priv {
|
||||
@ -537,9 +535,9 @@ static int uniphier_fi2c_probe(struct platform_device *pdev)
|
||||
}
|
||||
|
||||
if (of_property_read_u32(dev->of_node, "clock-frequency", &bus_speed))
|
||||
bus_speed = UNIPHIER_FI2C_DEFAULT_SPEED;
|
||||
bus_speed = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
|
||||
if (!bus_speed || bus_speed > UNIPHIER_FI2C_MAX_SPEED) {
|
||||
if (!bus_speed || bus_speed > I2C_MAX_FAST_MODE_FREQ) {
|
||||
dev_err(dev, "invalid clock-frequency %d\n", bus_speed);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
@ -35,9 +35,6 @@
|
||||
#define UNIPHIER_I2C_NOISE 0x1c /* noise filter control */
|
||||
#define UNIPHIER_I2C_SETUP 0x20 /* setup time control */
|
||||
|
||||
#define UNIPHIER_I2C_DEFAULT_SPEED 100000
|
||||
#define UNIPHIER_I2C_MAX_SPEED 400000
|
||||
|
||||
struct uniphier_i2c_priv {
|
||||
struct completion comp;
|
||||
struct i2c_adapter adap;
|
||||
@ -333,9 +330,9 @@ static int uniphier_i2c_probe(struct platform_device *pdev)
|
||||
}
|
||||
|
||||
if (of_property_read_u32(dev->of_node, "clock-frequency", &bus_speed))
|
||||
bus_speed = UNIPHIER_I2C_DEFAULT_SPEED;
|
||||
bus_speed = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
|
||||
if (!bus_speed || bus_speed > UNIPHIER_I2C_MAX_SPEED) {
|
||||
if (!bus_speed || bus_speed > I2C_MAX_FAST_MODE_FREQ) {
|
||||
dev_err(dev, "invalid clock-frequency %d\n", bus_speed);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
@ -399,7 +399,7 @@ static int wmt_i2c_probe(struct platform_device *pdev)
|
||||
|
||||
i2c_dev->mode = I2C_MODE_STANDARD;
|
||||
err = of_property_read_u32(np, "clock-frequency", &clk_rate);
|
||||
if ((!err) && (clk_rate == 400000))
|
||||
if (!err && (clk_rate == I2C_MAX_FAST_MODE_FREQ))
|
||||
i2c_dev->mode = I2C_MODE_FAST;
|
||||
|
||||
i2c_dev->dev = &pdev->dev;
|
||||
|
@ -71,8 +71,6 @@
|
||||
#define XLP9XX_I2C_SLAVEADDR_ADDR_SHIFT 1
|
||||
|
||||
#define XLP9XX_I2C_IP_CLK_FREQ 133000000UL
|
||||
#define XLP9XX_I2C_DEFAULT_FREQ 100000
|
||||
#define XLP9XX_I2C_HIGH_FREQ 400000
|
||||
#define XLP9XX_I2C_FIFO_SIZE 0x80U
|
||||
#define XLP9XX_I2C_TIMEOUT_MS 1000
|
||||
#define XLP9XX_I2C_BUSY_TIMEOUT 50
|
||||
@ -476,12 +474,12 @@ static int xlp9xx_i2c_get_frequency(struct platform_device *pdev,
|
||||
|
||||
err = device_property_read_u32(&pdev->dev, "clock-frequency", &freq);
|
||||
if (err) {
|
||||
freq = XLP9XX_I2C_DEFAULT_FREQ;
|
||||
freq = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
dev_dbg(&pdev->dev, "using default frequency %u\n", freq);
|
||||
} else if (freq == 0 || freq > XLP9XX_I2C_HIGH_FREQ) {
|
||||
} else if (freq == 0 || freq > I2C_MAX_FAST_MODE_FREQ) {
|
||||
dev_warn(&pdev->dev, "invalid frequency %u, using default\n",
|
||||
freq);
|
||||
freq = XLP9XX_I2C_DEFAULT_FREQ;
|
||||
freq = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
}
|
||||
priv->clk_hz = freq;
|
||||
|
||||
|
@ -404,7 +404,7 @@ static int xlr_i2c_probe(struct platform_device *pdev)
|
||||
|
||||
if (of_property_read_u32(pdev->dev.of_node, "clock-frequency",
|
||||
&busfreq))
|
||||
busfreq = 100000;
|
||||
busfreq = I2C_MAX_STANDARD_MODE_FREQ;
|
||||
|
||||
clk = devm_clk_get(&pdev->dev, NULL);
|
||||
if (!IS_ERR(clk)) {
|
||||
|
Loading…
Reference in New Issue
Block a user