diff options
author | Stephen Boyd <sboyd@codeaurora.org> | 2014-02-26 18:59:21 (GMT) |
---|---|---|
committer | Lee Jones <lee.jones@linaro.org> | 2014-03-19 08:58:29 (GMT) |
commit | dc1a95ccaa1158948bbc6648d6dadc534a30ed92 (patch) | |
tree | dd83329603148ec2f223f41eb102381ac13c272a /drivers/mfd/pm8921-core.c | |
parent | cced3548babc6d5338261f1b43ead62d93448567 (diff) | |
download | linux-dc1a95ccaa1158948bbc6648d6dadc534a30ed92.tar.xz |
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>
Diffstat (limited to 'drivers/mfd/pm8921-core.c')
-rw-r--r-- | drivers/mfd/pm8921-core.c | 198 |
1 files changed, 75 insertions, 123 deletions
diff --git a/drivers/mfd/pm8921-core.c b/drivers/mfd/pm8921-core.c index 9ddc31f..c25e7da 100644 --- a/drivers/mfd/pm8921-core.c +++ b/drivers/mfd/pm8921-core.c @@ -17,15 +17,15 @@ #include <linux/interrupt.h> #include <linux/irqchip/chained_irq.h> #include <linux/irq.h> +#include <linux/irqdomain.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/err.h> #include <linux/ssbi.h> +#include <linux/of_platform.h> #include <linux/mfd/core.h> -#include <linux/mfd/pm8xxx/pm8921.h> #include <linux/mfd/pm8xxx/core.h> -#include <linux/mfd/pm8xxx/irq.h> #define SSBI_REG_ADDR_IRQ_BASE 0x1BB @@ -53,11 +53,12 @@ #define REG_HWREV 0x002 /* PMIC4 revision */ #define REG_HWREV_2 0x0E8 /* PMIC4 revision 2 */ +#define PM8921_NR_IRQS 256 + struct pm_irq_chip { struct device *dev; spinlock_t pm_irq_lock; - unsigned int devirq; - unsigned int irq_base; + struct irq_domain *irqdomain; unsigned int num_irqs; unsigned int num_blocks; unsigned int num_masters; @@ -138,7 +139,7 @@ static int pm8xxx_irq_block_handler(struct pm_irq_chip *chip, int block) for (i = 0; i < 8; i++) { if (bits & (1 << i)) { pmirq = block * 8 + i; - irq = pmirq + chip->irq_base; + irq = irq_find_mapping(chip->irqdomain, pmirq); generic_handle_irq(irq); } } @@ -197,12 +198,11 @@ static void pm8xxx_irq_handler(unsigned int irq, struct irq_desc *desc) static void pm8xxx_irq_mask_ack(struct irq_data *d) { struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d); - unsigned int pmirq = d->irq - chip->irq_base; - int master, irq_bit; + unsigned int pmirq = irqd_to_hwirq(d); + int irq_bit; u8 block, config; block = pmirq / 8; - master = block / 8; irq_bit = pmirq % 8; config = chip->config[pmirq] | PM_IRQF_MASK_ALL | PM_IRQF_CLR; @@ -212,12 +212,11 @@ static void pm8xxx_irq_mask_ack(struct irq_data *d) static void pm8xxx_irq_unmask(struct irq_data *d) { struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d); - unsigned int pmirq = d->irq - chip->irq_base; - int master, irq_bit; + unsigned int pmirq = irqd_to_hwirq(d); + int irq_bit; u8 block, config; block = pmirq / 8; - master = block / 8; irq_bit = pmirq % 8; config = chip->config[pmirq]; @@ -227,12 +226,11 @@ static void pm8xxx_irq_unmask(struct irq_data *d) static int pm8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type) { struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d); - unsigned int pmirq = d->irq - chip->irq_base; - int master, irq_bit; + unsigned int pmirq = irqd_to_hwirq(d); + int irq_bit; u8 block, config; block = pmirq / 8; - master = block / 8; irq_bit = pmirq % 8; chip->config[pmirq] = (irq_bit << PM_IRQF_BITS_SHIFT) @@ -287,12 +285,9 @@ static int pm8xxx_get_irq_stat(struct pm_irq_chip *chip, int irq) int pmirq, rc; u8 block, bits, bit; unsigned long flags; + struct irq_data *irq_data = irq_get_irq_data(irq); - if (chip == NULL || irq < chip->irq_base || - irq >= chip->irq_base + chip->num_irqs) - return -EINVAL; - - pmirq = irq - chip->irq_base; + pmirq = irq_data->hwirq; block = pmirq / 8; bit = pmirq % 8; @@ -321,67 +316,29 @@ bail_out: return rc; } -static struct pm_irq_chip *pm8xxx_irq_init(struct device *dev, - const struct pm8xxx_irq_platform_data *pdata) -{ - struct pm_irq_chip *chip; - int devirq, rc; - unsigned int pmirq; - - if (!pdata) { - pr_err("No platform data\n"); - return ERR_PTR(-EINVAL); - } +static struct lock_class_key pm8xxx_irq_lock_class; - devirq = pdata->devirq; - if (devirq < 0) { - pr_err("missing devirq\n"); - rc = devirq; - return ERR_PTR(-EINVAL); - } - - chip = kzalloc(sizeof(struct pm_irq_chip) - + sizeof(u8) * pdata->irq_cdata.nirqs, GFP_KERNEL); - if (!chip) { - pr_err("Cannot alloc pm_irq_chip struct\n"); - return ERR_PTR(-EINVAL); - } - - chip->dev = dev; - chip->devirq = devirq; - chip->irq_base = pdata->irq_base; - chip->num_irqs = pdata->irq_cdata.nirqs; - chip->num_blocks = DIV_ROUND_UP(chip->num_irqs, 8); - chip->num_masters = DIV_ROUND_UP(chip->num_blocks, 8); - spin_lock_init(&chip->pm_irq_lock); +static int pm8xxx_irq_domain_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hwirq) +{ + struct pm_irq_chip *chip = d->host_data; - for (pmirq = 0; pmirq < chip->num_irqs; pmirq++) { - irq_set_chip_and_handler(chip->irq_base + pmirq, - &pm8xxx_irq_chip, - handle_level_irq); - irq_set_chip_data(chip->irq_base + pmirq, chip); + irq_set_lockdep_class(irq, &pm8xxx_irq_lock_class); + irq_set_chip_and_handler(irq, &pm8xxx_irq_chip, handle_level_irq); + irq_set_chip_data(irq, chip); #ifdef CONFIG_ARM - set_irq_flags(chip->irq_base + pmirq, IRQF_VALID); + set_irq_flags(irq, IRQF_VALID); #else - irq_set_noprobe(chip->irq_base + pmirq); + irq_set_noprobe(irq); #endif - } - - irq_set_irq_type(devirq, pdata->irq_trigger_flag); - irq_set_handler_data(devirq, chip); - irq_set_chained_handler(devirq, pm8xxx_irq_handler); - irq_set_irq_wake(devirq, 1); - - return chip; -} - -static int pm8xxx_irq_exit(struct pm_irq_chip *chip) -{ - irq_set_chained_handler(chip->devirq, NULL); - kfree(chip); return 0; } +static const struct irq_domain_ops pm8xxx_irq_domain_ops = { + .xlate = irq_domain_xlate_twocell, + .map = pm8xxx_irq_domain_map, +}; + static int pm8921_readb(const struct device *dev, u16 addr, u8 *val) { const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev); @@ -432,42 +389,19 @@ static struct pm8xxx_drvdata pm8921_drvdata = { .pmic_read_irq_stat = pm8921_read_irq_stat, }; -static int pm8921_add_subdevices(const struct pm8921_platform_data - *pdata, - struct pm8921 *pmic, - u32 rev) -{ - int ret = 0, irq_base = 0; - struct pm_irq_chip *irq_chip; - - if (pdata->irq_pdata) { - pdata->irq_pdata->irq_cdata.nirqs = PM8921_NR_IRQS; - pdata->irq_pdata->irq_cdata.rev = rev; - irq_base = pdata->irq_pdata->irq_base; - irq_chip = pm8xxx_irq_init(pmic->dev, pdata->irq_pdata); - - if (IS_ERR(irq_chip)) { - pr_err("Failed to init interrupts ret=%ld\n", - PTR_ERR(irq_chip)); - return PTR_ERR(irq_chip); - } - pmic->irq_chip = irq_chip; - } - return ret; -} - static int pm8921_probe(struct platform_device *pdev) { - const struct pm8921_platform_data *pdata = dev_get_platdata(&pdev->dev); struct pm8921 *pmic; int rc; u8 val; + unsigned int irq; u32 rev; + struct pm_irq_chip *chip; + unsigned int nirqs = PM8921_NR_IRQS; - if (!pdata) { - pr_err("missing platform data\n"); - return -EINVAL; - } + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; pmic = devm_kzalloc(&pdev->dev, sizeof(struct pm8921), GFP_KERNEL); if (!pmic) { @@ -498,37 +432,55 @@ static int pm8921_probe(struct platform_device *pdev) pm8921_drvdata.pm_chip_data = pmic; platform_set_drvdata(pdev, &pm8921_drvdata); - rc = pm8921_add_subdevices(pdata, pmic, rev); + chip = devm_kzalloc(&pdev->dev, sizeof(*chip) + + sizeof(chip->config[0]) * nirqs, + GFP_KERNEL); + if (!chip) + return -ENOMEM; + + pmic->irq_chip = chip; + chip->dev = &pdev->dev; + chip->num_irqs = nirqs; + chip->num_blocks = DIV_ROUND_UP(chip->num_irqs, 8); + chip->num_masters = DIV_ROUND_UP(chip->num_blocks, 8); + spin_lock_init(&chip->pm_irq_lock); + + chip->irqdomain = irq_domain_add_linear(pdev->dev.of_node, nirqs, + &pm8xxx_irq_domain_ops, + chip); + if (!chip->irqdomain) + return -ENODEV; + + irq_set_handler_data(irq, chip); + irq_set_chained_handler(irq, pm8xxx_irq_handler); + irq_set_irq_wake(irq, 1); + + rc = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev); if (rc) { - pr_err("Cannot add subdevices rc=%d\n", rc); - goto err; + irq_set_chained_handler(irq, NULL); + irq_set_handler_data(irq, NULL); + irq_domain_remove(chip->irqdomain); } - /* gpio might not work if no irq device is found */ - WARN_ON(pmic->irq_chip == NULL); + return rc; +} +static int pm8921_remove_child(struct device *dev, void *unused) +{ + platform_device_unregister(to_platform_device(dev)); return 0; - -err: - mfd_remove_devices(pmic->dev); - return rc; } static int pm8921_remove(struct platform_device *pdev) { - struct pm8xxx_drvdata *drvdata; - struct pm8921 *pmic = NULL; - - drvdata = platform_get_drvdata(pdev); - if (drvdata) - pmic = drvdata->pm_chip_data; - if (pmic) { - mfd_remove_devices(pmic->dev); - if (pmic->irq_chip) { - pm8xxx_irq_exit(pmic->irq_chip); - pmic->irq_chip = NULL; - } - } + int irq = platform_get_irq(pdev, 0); + struct pm8921 *pmic = pm8921_drvdata.pm_chip_data; + struct pm_irq_chip *chip = pmic->irq_chip; + + device_for_each_child(&pdev->dev, NULL, pm8921_remove_child); + irq_set_chained_handler(irq, NULL); + irq_set_handler_data(irq, NULL); + irq_domain_remove(chip->irqdomain); return 0; } |