diff options
author | Lee Jones <lee.jones@linaro.org> | 2012-11-05 16:10:31 +0100 |
---|---|---|
committer | Samuel Ortiz <sameo@linux.intel.com> | 2012-11-11 23:35:03 +0100 |
commit | 76f93992e4c44f30be797d5c99d6f369ed001747 (patch) | |
tree | f4ece6f5b6cf7bcd06f3460640b01807fae6fc0a /drivers/mfd/stmpe.c | |
parent | 7da0cbfc54c82eec793ff3d1b23b7a25406c6dba (diff) | |
download | linux-76f93992e4c44f30be797d5c99d6f369ed001747.tar.gz linux-76f93992e4c44f30be797d5c99d6f369ed001747.tar.xz |
mfd: Provide the STMPE driver with its own IRQ domain
The STMPE driver is yet another IRQ controller which requires its
own IRQ domain. So, we provide it with one.
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/stmpe.c')
-rw-r--r-- | drivers/mfd/stmpe.c | 82 |
1 files changed, 50 insertions, 32 deletions
diff --git a/drivers/mfd/stmpe.c b/drivers/mfd/stmpe.c index ad13cb00a749..5c8d8f260df2 100644 --- a/drivers/mfd/stmpe.c +++ b/drivers/mfd/stmpe.c @@ -12,6 +12,7 @@ #include <linux/kernel.h> #include <linux/interrupt.h> #include <linux/irq.h> +#include <linux/irqdomain.h> #include <linux/pm.h> #include <linux/slab.h> #include <linux/mfd/core.h> @@ -757,7 +758,9 @@ static irqreturn_t stmpe_irq(int irq, void *data) int i; if (variant->id_val == STMPE801_ID) { - handle_nested_irq(stmpe->irq_base); + int base = irq_create_mapping(stmpe->domain, 0); + + handle_nested_irq(base); return IRQ_HANDLED; } @@ -778,8 +781,9 @@ static irqreturn_t stmpe_irq(int irq, void *data) while (status) { int bit = __ffs(status); int line = bank * 8 + bit; + int nestedirq = irq_create_mapping(stmpe->domain, line); - handle_nested_irq(stmpe->irq_base + line); + handle_nested_irq(nestedirq); status &= ~(1 << bit); } @@ -820,7 +824,7 @@ static void stmpe_irq_sync_unlock(struct irq_data *data) static void stmpe_irq_mask(struct irq_data *data) { struct stmpe *stmpe = irq_data_get_irq_chip_data(data); - int offset = data->irq - stmpe->irq_base; + int offset = data->hwirq; int regoffset = offset / 8; int mask = 1 << (offset % 8); @@ -830,7 +834,7 @@ static void stmpe_irq_mask(struct irq_data *data) static void stmpe_irq_unmask(struct irq_data *data) { struct stmpe *stmpe = irq_data_get_irq_chip_data(data); - int offset = data->irq - stmpe->irq_base; + int offset = data->hwirq; int regoffset = offset / 8; int mask = 1 << (offset % 8); @@ -845,43 +849,62 @@ static struct irq_chip stmpe_irq_chip = { .irq_unmask = stmpe_irq_unmask, }; -static int __devinit stmpe_irq_init(struct stmpe *stmpe) +static int stmpe_irq_map(struct irq_domain *d, unsigned int virq, + irq_hw_number_t hwirq) { + struct stmpe *stmpe = d->host_data; struct irq_chip *chip = NULL; - int num_irqs = stmpe->variant->num_irqs; - int base = stmpe->irq_base; - int irq; if (stmpe->variant->id_val != STMPE801_ID) chip = &stmpe_irq_chip; - for (irq = base; irq < base + num_irqs; irq++) { - irq_set_chip_data(irq, stmpe); - irq_set_chip_and_handler(irq, chip, handle_edge_irq); - irq_set_nested_thread(irq, 1); + irq_set_chip_data(virq, stmpe); + irq_set_chip_and_handler(virq, chip, handle_edge_irq); + irq_set_nested_thread(virq, 1); #ifdef CONFIG_ARM - set_irq_flags(irq, IRQF_VALID); + set_irq_flags(virq, IRQF_VALID); #else - irq_set_noprobe(irq); + irq_set_noprobe(virq); #endif - } return 0; } -static void stmpe_irq_remove(struct stmpe *stmpe) +static void stmpe_irq_unmap(struct irq_domain *d, unsigned int virq) { - int num_irqs = stmpe->variant->num_irqs; - int base = stmpe->irq_base; - int irq; - - for (irq = base; irq < base + num_irqs; irq++) { #ifdef CONFIG_ARM - set_irq_flags(irq, 0); + set_irq_flags(virq, 0); #endif - irq_set_chip_and_handler(irq, NULL, NULL); - irq_set_chip_data(irq, NULL); + irq_set_chip_and_handler(virq, NULL, NULL); + irq_set_chip_data(virq, NULL); +} + +static struct irq_domain_ops stmpe_irq_ops = { + .map = stmpe_irq_map, + .unmap = stmpe_irq_unmap, + .xlate = irq_domain_xlate_twocell, +}; + +static int __devinit stmpe_irq_init(struct stmpe *stmpe) +{ + int base = stmpe->irq_base; + int num_irqs = stmpe->variant->num_irqs; + + if (base) { + stmpe->domain = irq_domain_add_legacy( + NULL, num_irqs, base, 0, &stmpe_irq_ops, stmpe); + } + else { + stmpe->domain = irq_domain_add_linear( + NULL, num_irqs, &stmpe_irq_ops, stmpe); + } + + if (!stmpe->domain) { + dev_err(stmpe->dev, "Failed to create irqdomain\n"); + return -ENOSYS; } + + return 0; } static int __devinit stmpe_chip_init(struct stmpe *stmpe) @@ -954,7 +977,7 @@ static int __devinit stmpe_add_device(struct stmpe *stmpe, struct mfd_cell *cell) { return mfd_add_devices(stmpe->dev, stmpe->pdata->id, cell, 1, - NULL, stmpe->irq_base, NULL); + NULL, stmpe->irq_base, stmpe->domain); } static int __devinit stmpe_devices_init(struct stmpe *stmpe) @@ -1067,7 +1090,7 @@ int __devinit stmpe_probe(struct stmpe_client_info *ci, int partnum) if (ret) { dev_err(stmpe->dev, "failed to request IRQ: %d\n", ret); - goto out_removeirq; + goto free_gpio; } } @@ -1083,9 +1106,6 @@ out_removedevs: mfd_remove_devices(stmpe->dev); if (stmpe->irq >= 0) free_irq(stmpe->irq, stmpe); -out_removeirq: - if (stmpe->irq >= 0) - stmpe_irq_remove(stmpe); free_gpio: if (pdata->irq_over_gpio) gpio_free(pdata->irq_gpio); @@ -1098,10 +1118,8 @@ int stmpe_remove(struct stmpe *stmpe) { mfd_remove_devices(stmpe->dev); - if (stmpe->irq >= 0) { + if (stmpe->irq >= 0) free_irq(stmpe->irq, stmpe); - stmpe_irq_remove(stmpe); - } if (stmpe->pdata->irq_over_gpio) gpio_free(stmpe->pdata->irq_gpio); |