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OMAP3+: VC: cleanup i2c slave address configuration

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- Add an i2c_slave_address field to the omap_vc_channel
- use VC/VP read/modify/write helper instead of open-coding
- remove smps_sa_shift, use __ffs(mask) for shift value
- I2C addresses 10-bit, change size to u16

Special thanks to Shweta Gulati <shweta.gulati@ti.com> for suggesting
the use of __ffs(x) instead of ffs(x) - 1.

Signed-off-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
Kevin Hilman 2011-03-29 14:02:36 -07:00
parent 4bcc475ebd
commit ba112a4e86
5 changed files with 15 additions and 14 deletions
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12
arch/arm/mach-omap2/vc.c
View File

@ -241,11 +241,13 @@ void __init omap_vc_init_channel(struct voltagedomain *voltdm)
return;
}
/* Set up the SMPS_SA(i2c slave address in VC */
vc_val = voltdm->read(vc->common->smps_sa_reg);
vc_val &= ~vc->smps_sa_mask;
vc_val |= vdd->pmic_info->i2c_slave_addr << vc->smps_sa_shift;
voltdm->write(vc_val, vc->common->smps_sa_reg);
/* get PMIC/board specific settings */
vc->i2c_slave_addr = vdd->pmic_info->i2c_slave_addr;
/* Configure the i2c slave address for this VC */
voltdm->rmw(vc->smps_sa_mask,
vc->i2c_slave_addr << __ffs(vc->smps_sa_mask),
vc->common->smps_sa_reg);
/* Setup the VOLRA(pmic reg addr) in VC */
vc_val = voltdm->read(vc->common->smps_volra_reg);

9
arch/arm/mach-omap2/vc.h
View File

@ -56,21 +56,24 @@ struct omap_vc_common {
/**
* struct omap_vc_channel - VC per-instance data
* @i2c_slave_addr: I2C slave address of PMIC for this VC channel
* @common: pointer to VC common data for this platform
* @smps_sa_mask: SA* bitmask in the PRM_VC_SMPS_SA register
* @smps_sa_mask: i2c slave address bitmask in the PRM_VC_SMPS_SA register
* @smps_volra_mask: VOLRA* bitmask in the PRM_VC_VOL_RA register
* @smps_sa_shift: SA* field shift in the PRM_VC_SMPS_SA register
* @smps_volra_shift: VOLRA* field shift in the PRM_VC_VOL_RA register
*
* XXX It is not necessary to have both a *_mask and a *_shift -
* remove one
*/
struct omap_vc_channel {
/* channel state */
u16 i2c_slave_addr;
/* register access data */
const struct omap_vc_common *common;
u32 smps_sa_mask;
u32 smps_volra_mask;
u8 cmdval_reg;
u8 smps_sa_shift;
u8 smps_volra_shift;
};

2
arch/arm/mach-omap2/vc3xxx_data.c
View File

@ -47,7 +47,6 @@ static struct omap_vc_common omap3_vc_common = {
struct omap_vc_channel omap3_vc_mpu = {
.common = &omap3_vc_common,
.cmdval_reg = OMAP3_PRM_VC_CMD_VAL_0_OFFSET,
.smps_sa_shift = OMAP3430_PRM_VC_SMPS_SA_SA0_SHIFT,
.smps_sa_mask = OMAP3430_PRM_VC_SMPS_SA_SA0_MASK,
.smps_volra_shift = OMAP3430_VOLRA0_SHIFT,
.smps_volra_mask = OMAP3430_VOLRA0_MASK,
@ -56,7 +55,6 @@ struct omap_vc_channel omap3_vc_mpu = {
struct omap_vc_channel omap3_vc_core = {
.common = &omap3_vc_common,
.cmdval_reg = OMAP3_PRM_VC_CMD_VAL_1_OFFSET,
.smps_sa_shift = OMAP3430_PRM_VC_SMPS_SA_SA1_SHIFT,
.smps_sa_mask = OMAP3430_PRM_VC_SMPS_SA_SA1_MASK,
.smps_volra_shift = OMAP3430_VOLRA1_SHIFT,
.smps_volra_mask = OMAP3430_VOLRA1_MASK,

3
arch/arm/mach-omap2/vc44xx_data.c
View File

@ -49,7 +49,6 @@ static const struct omap_vc_common omap4_vc_common = {
struct omap_vc_channel omap4_vc_mpu = {
.common = &omap4_vc_common,
.cmdval_reg = OMAP4_PRM_VC_VAL_CMD_VDD_MPU_L_OFFSET,
.smps_sa_shift = OMAP4430_SA_VDD_MPU_L_PRM_VC_SMPS_SA_SHIFT,
.smps_sa_mask = OMAP4430_SA_VDD_MPU_L_PRM_VC_SMPS_SA_MASK,
.smps_volra_shift = OMAP4430_VOLRA_VDD_MPU_L_SHIFT,
.smps_volra_mask = OMAP4430_VOLRA_VDD_MPU_L_MASK,
@ -58,7 +57,6 @@ struct omap_vc_channel omap4_vc_mpu = {
struct omap_vc_channel omap4_vc_iva = {
.common = &omap4_vc_common,
.cmdval_reg = OMAP4_PRM_VC_VAL_CMD_VDD_IVA_L_OFFSET,
.smps_sa_shift = OMAP4430_SA_VDD_IVA_L_PRM_VC_SMPS_SA_SHIFT,
.smps_sa_mask = OMAP4430_SA_VDD_IVA_L_PRM_VC_SMPS_SA_MASK,
.smps_volra_shift = OMAP4430_VOLRA_VDD_IVA_L_SHIFT,
.smps_volra_mask = OMAP4430_VOLRA_VDD_IVA_L_MASK,
@ -67,7 +65,6 @@ struct omap_vc_channel omap4_vc_iva = {
struct omap_vc_channel omap4_vc_core = {
.common = &omap4_vc_common,
.cmdval_reg = OMAP4_PRM_VC_VAL_CMD_VDD_CORE_L_OFFSET,
.smps_sa_shift = OMAP4430_SA_VDD_CORE_L_0_6_SHIFT,
.smps_sa_mask = OMAP4430_SA_VDD_CORE_L_0_6_MASK,
.smps_volra_shift = OMAP4430_VOLRA_VDD_CORE_L_SHIFT,
.smps_volra_mask = OMAP4430_VOLRA_VDD_CORE_L_MASK,

3
arch/arm/mach-omap2/voltage.h
View File

@ -102,6 +102,7 @@ struct omap_volt_data {
* struct omap_volt_pmic_info - PMIC specific data required by voltage driver.
* @slew_rate: PMIC slew rate (in uv/us)
* @step_size: PMIC voltage step size (in uv)
* @i2c_slave_addr: I2C slave address of PMIC
* @vsel_to_uv: PMIC API to convert vsel value to actual voltage in uV.
* @uv_to_vsel: PMIC API to convert voltage in uV to vsel value.
* @volt_reg_addr: voltage configuration register address
@ -115,13 +116,13 @@ struct omap_volt_pmic_info {
u32 ret_volt;
u32 off_volt;
u16 volt_setup_time;
u16 i2c_slave_addr;
u8 vp_erroroffset;
u8 vp_vstepmin;
u8 vp_vstepmax;
u8 vp_vddmin;
u8 vp_vddmax;
u8 vp_timeout_us;
u8 i2c_slave_addr;
u8 volt_reg_addr;
u8 cmd_reg_addr;
unsigned long (*vsel_to_uv) (const u8 vsel);