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mfd: pm8921: Migrate to irqdomains
Convert this driver to use irqdomains so that the PMIC's child devices can be converted to devicetree. Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This commit is contained in:
Stephen Boyd
Lee Jones
parent
cced3548ba
commit
dc1a95ccaa
@ -479,6 +479,7 @@ config MFD_PM8XXX
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config MFD_PM8921_CORE
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tristate "Qualcomm PM8921 PMIC chip"
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depends on (ARCH_MSM || HEXAGON)
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select IRQ_DOMAIN
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select MFD_CORE
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select MFD_PM8XXX
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help
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@ -17,15 +17,15 @@
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#include <linux/interrupt.h>
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#include <linux/irqchip/chained_irq.h>
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/ssbi.h>
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#include <linux/of_platform.h>
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#include <linux/mfd/core.h>
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#include <linux/mfd/pm8xxx/pm8921.h>
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#include <linux/mfd/pm8xxx/core.h>
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#include <linux/mfd/pm8xxx/irq.h>
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#define SSBI_REG_ADDR_IRQ_BASE 0x1BB
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@ -53,11 +53,12 @@
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#define REG_HWREV 0x002 /* PMIC4 revision */
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#define REG_HWREV_2 0x0E8 /* PMIC4 revision 2 */
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#define PM8921_NR_IRQS 256
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struct pm_irq_chip {
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struct device *dev;
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spinlock_t pm_irq_lock;
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unsigned int devirq;
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unsigned int irq_base;
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struct irq_domain *irqdomain;
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unsigned int num_irqs;
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unsigned int num_blocks;
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unsigned int num_masters;
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@ -138,7 +139,7 @@ static int pm8xxx_irq_block_handler(struct pm_irq_chip *chip, int block)
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for (i = 0; i < 8; i++) {
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if (bits & (1 << i)) {
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pmirq = block * 8 + i;
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irq = pmirq + chip->irq_base;
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irq = irq_find_mapping(chip->irqdomain, pmirq);
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generic_handle_irq(irq);
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}
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}
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@ -197,12 +198,11 @@ static void pm8xxx_irq_handler(unsigned int irq, struct irq_desc *desc)
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static void pm8xxx_irq_mask_ack(struct irq_data *d)
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{
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struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
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unsigned int pmirq = d->irq - chip->irq_base;
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int master, irq_bit;
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unsigned int pmirq = irqd_to_hwirq(d);
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int irq_bit;
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u8 block, config;
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block = pmirq / 8;
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master = block / 8;
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irq_bit = pmirq % 8;
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config = chip->config[pmirq] | PM_IRQF_MASK_ALL | PM_IRQF_CLR;
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@ -212,12 +212,11 @@ static void pm8xxx_irq_mask_ack(struct irq_data *d)
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static void pm8xxx_irq_unmask(struct irq_data *d)
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{
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struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
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unsigned int pmirq = d->irq - chip->irq_base;
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int master, irq_bit;
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unsigned int pmirq = irqd_to_hwirq(d);
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int irq_bit;
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u8 block, config;
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block = pmirq / 8;
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master = block / 8;
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irq_bit = pmirq % 8;
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config = chip->config[pmirq];
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@ -227,12 +226,11 @@ static void pm8xxx_irq_unmask(struct irq_data *d)
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static int pm8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type)
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{
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struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
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unsigned int pmirq = d->irq - chip->irq_base;
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int master, irq_bit;
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unsigned int pmirq = irqd_to_hwirq(d);
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int irq_bit;
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u8 block, config;
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block = pmirq / 8;
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master = block / 8;
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irq_bit = pmirq % 8;
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chip->config[pmirq] = (irq_bit << PM_IRQF_BITS_SHIFT)
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@ -287,12 +285,9 @@ static int pm8xxx_get_irq_stat(struct pm_irq_chip *chip, int irq)
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int pmirq, rc;
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u8 block, bits, bit;
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unsigned long flags;
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struct irq_data *irq_data = irq_get_irq_data(irq);
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if (chip == NULL || irq < chip->irq_base ||
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irq >= chip->irq_base + chip->num_irqs)
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return -EINVAL;
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pmirq = irq - chip->irq_base;
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pmirq = irq_data->hwirq;
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block = pmirq / 8;
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bit = pmirq % 8;
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@ -321,67 +316,29 @@ bail_out:
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return rc;
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}
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static struct pm_irq_chip *pm8xxx_irq_init(struct device *dev,
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const struct pm8xxx_irq_platform_data *pdata)
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static struct lock_class_key pm8xxx_irq_lock_class;
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static int pm8xxx_irq_domain_map(struct irq_domain *d, unsigned int irq,
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irq_hw_number_t hwirq)
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{
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struct pm_irq_chip *chip;
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int devirq, rc;
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unsigned int pmirq;
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struct pm_irq_chip *chip = d->host_data;
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if (!pdata) {
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pr_err("No platform data\n");
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return ERR_PTR(-EINVAL);
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}
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devirq = pdata->devirq;
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if (devirq < 0) {
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pr_err("missing devirq\n");
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rc = devirq;
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return ERR_PTR(-EINVAL);
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}
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chip = kzalloc(sizeof(struct pm_irq_chip)
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+ sizeof(u8) * pdata->irq_cdata.nirqs, GFP_KERNEL);
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if (!chip) {
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pr_err("Cannot alloc pm_irq_chip struct\n");
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return ERR_PTR(-EINVAL);
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}
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chip->dev = dev;
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chip->devirq = devirq;
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chip->irq_base = pdata->irq_base;
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chip->num_irqs = pdata->irq_cdata.nirqs;
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chip->num_blocks = DIV_ROUND_UP(chip->num_irqs, 8);
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chip->num_masters = DIV_ROUND_UP(chip->num_blocks, 8);
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spin_lock_init(&chip->pm_irq_lock);
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for (pmirq = 0; pmirq < chip->num_irqs; pmirq++) {
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irq_set_chip_and_handler(chip->irq_base + pmirq,
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&pm8xxx_irq_chip,
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handle_level_irq);
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irq_set_chip_data(chip->irq_base + pmirq, chip);
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irq_set_lockdep_class(irq, &pm8xxx_irq_lock_class);
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irq_set_chip_and_handler(irq, &pm8xxx_irq_chip, handle_level_irq);
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irq_set_chip_data(irq, chip);
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#ifdef CONFIG_ARM
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set_irq_flags(chip->irq_base + pmirq, IRQF_VALID);
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set_irq_flags(irq, IRQF_VALID);
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#else
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irq_set_noprobe(chip->irq_base + pmirq);
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irq_set_noprobe(irq);
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#endif
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}
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irq_set_irq_type(devirq, pdata->irq_trigger_flag);
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irq_set_handler_data(devirq, chip);
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irq_set_chained_handler(devirq, pm8xxx_irq_handler);
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irq_set_irq_wake(devirq, 1);
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return chip;
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}
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static int pm8xxx_irq_exit(struct pm_irq_chip *chip)
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{
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irq_set_chained_handler(chip->devirq, NULL);
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kfree(chip);
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return 0;
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}
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static const struct irq_domain_ops pm8xxx_irq_domain_ops = {
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.xlate = irq_domain_xlate_twocell,
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.map = pm8xxx_irq_domain_map,
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};
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static int pm8921_readb(const struct device *dev, u16 addr, u8 *val)
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{
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const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev);
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@ -432,42 +389,19 @@ static struct pm8xxx_drvdata pm8921_drvdata = {
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.pmic_read_irq_stat = pm8921_read_irq_stat,
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};
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static int pm8921_add_subdevices(const struct pm8921_platform_data
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*pdata,
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struct pm8921 *pmic,
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u32 rev)
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{
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int ret = 0, irq_base = 0;
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struct pm_irq_chip *irq_chip;
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if (pdata->irq_pdata) {
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pdata->irq_pdata->irq_cdata.nirqs = PM8921_NR_IRQS;
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pdata->irq_pdata->irq_cdata.rev = rev;
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irq_base = pdata->irq_pdata->irq_base;
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irq_chip = pm8xxx_irq_init(pmic->dev, pdata->irq_pdata);
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if (IS_ERR(irq_chip)) {
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pr_err("Failed to init interrupts ret=%ld\n",
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PTR_ERR(irq_chip));
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return PTR_ERR(irq_chip);
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}
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pmic->irq_chip = irq_chip;
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}
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return ret;
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}
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static int pm8921_probe(struct platform_device *pdev)
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{
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const struct pm8921_platform_data *pdata = dev_get_platdata(&pdev->dev);
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struct pm8921 *pmic;
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int rc;
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u8 val;
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unsigned int irq;
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u32 rev;
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struct pm_irq_chip *chip;
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unsigned int nirqs = PM8921_NR_IRQS;
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if (!pdata) {
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pr_err("missing platform data\n");
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return -EINVAL;
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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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return irq;
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pmic = devm_kzalloc(&pdev->dev, sizeof(struct pm8921), GFP_KERNEL);
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if (!pmic) {
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@ -498,37 +432,55 @@ static int pm8921_probe(struct platform_device *pdev)
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pm8921_drvdata.pm_chip_data = pmic;
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platform_set_drvdata(pdev, &pm8921_drvdata);
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rc = pm8921_add_subdevices(pdata, pmic, rev);
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chip = devm_kzalloc(&pdev->dev, sizeof(*chip) +
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sizeof(chip->config[0]) * nirqs,
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GFP_KERNEL);
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if (!chip)
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return -ENOMEM;
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pmic->irq_chip = chip;
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chip->dev = &pdev->dev;
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chip->num_irqs = nirqs;
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chip->num_blocks = DIV_ROUND_UP(chip->num_irqs, 8);
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chip->num_masters = DIV_ROUND_UP(chip->num_blocks, 8);
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spin_lock_init(&chip->pm_irq_lock);
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chip->irqdomain = irq_domain_add_linear(pdev->dev.of_node, nirqs,
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&pm8xxx_irq_domain_ops,
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chip);
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if (!chip->irqdomain)
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return -ENODEV;
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irq_set_handler_data(irq, chip);
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irq_set_chained_handler(irq, pm8xxx_irq_handler);
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irq_set_irq_wake(irq, 1);
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rc = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
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if (rc) {
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pr_err("Cannot add subdevices rc=%d\n", rc);
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goto err;
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irq_set_chained_handler(irq, NULL);
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irq_set_handler_data(irq, NULL);
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irq_domain_remove(chip->irqdomain);
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}
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/* gpio might not work if no irq device is found */
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WARN_ON(pmic->irq_chip == NULL);
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return 0;
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err:
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mfd_remove_devices(pmic->dev);
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return rc;
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}
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static int pm8921_remove_child(struct device *dev, void *unused)
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{
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platform_device_unregister(to_platform_device(dev));
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return 0;
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}
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static int pm8921_remove(struct platform_device *pdev)
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{
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struct pm8xxx_drvdata *drvdata;
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struct pm8921 *pmic = NULL;
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int irq = platform_get_irq(pdev, 0);
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struct pm8921 *pmic = pm8921_drvdata.pm_chip_data;
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struct pm_irq_chip *chip = pmic->irq_chip;
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drvdata = platform_get_drvdata(pdev);
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if (drvdata)
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pmic = drvdata->pm_chip_data;
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if (pmic) {
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mfd_remove_devices(pmic->dev);
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if (pmic->irq_chip) {
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pm8xxx_irq_exit(pmic->irq_chip);
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pmic->irq_chip = NULL;
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}
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}
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device_for_each_child(&pdev->dev, NULL, pm8921_remove_child);
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irq_set_chained_handler(irq, NULL);
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irq_set_handler_data(irq, NULL);
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irq_domain_remove(chip->irqdomain);
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return 0;
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}
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@ -1,36 +0,0 @@
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/*
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* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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/*
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* Qualcomm PMIC irq 8xxx driver header file
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*
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*/
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#ifndef __MFD_PM8XXX_IRQ_H
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#define __MFD_PM8XXX_IRQ_H
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#include <linux/errno.h>
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#include <linux/err.h>
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struct pm8xxx_irq_core_data {
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u32 rev;
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int nirqs;
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};
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struct pm8xxx_irq_platform_data {
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int irq_base;
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struct pm8xxx_irq_core_data irq_cdata;
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int devirq;
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int irq_trigger_flag;
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};
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#endif /* __MFD_PM8XXX_IRQ_H */
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@ -1,30 +0,0 @@
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/*
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* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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/*
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* Qualcomm PMIC 8921 driver header file
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*
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*/
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#ifndef __MFD_PM8921_H
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#define __MFD_PM8921_H
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#include <linux/mfd/pm8xxx/irq.h>
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#define PM8921_NR_IRQS 256
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struct pm8921_platform_data {
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int irq_base;
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struct pm8xxx_irq_platform_data *irq_pdata;
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};
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#endif
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