diff options
Diffstat (limited to 'drivers/mfd/twl6030-irq.c')
| -rw-r--r-- | drivers/mfd/twl6030-irq.c | 86 |
1 files changed, 54 insertions, 32 deletions
diff --git a/drivers/mfd/twl6030-irq.c b/drivers/mfd/twl6030-irq.c index c6b456ad734..b76902f1e44 100644 --- a/drivers/mfd/twl6030-irq.c +++ b/drivers/mfd/twl6030-irq.c @@ -39,6 +39,8 @@ #include <linux/i2c/twl.h> #include <linux/platform_device.h> #include <linux/suspend.h> +#include <linux/of.h> +#include <linux/irqdomain.h> #include "twl-core.h" @@ -51,8 +53,8 @@ * * We set up IRQs starting at a platform-specified base. An interrupt map table, * specifies mapping between interrupt number and the associated module. - * */ +#define TWL6030_NR_IRQS 20 static int twl6030_interrupt_mapping[24] = { PWR_INTR_OFFSET, /* Bit 0 PWRON */ @@ -185,8 +187,17 @@ static int twl6030_irq_thread(void *data) } local_irq_enable(); } - ret = twl_i2c_write(TWL_MODULE_PIH, sts.bytes, - REG_INT_STS_A, 3); /* clear INT_STS_A */ + + /* + * NOTE: + * Simulation confirms that documentation is wrong w.r.t the + * interrupt status clear operation. A single *byte* write to + * any one of STS_A to STS_C register results in all three + * STS registers being reset. Since it does not matter which + * value is written, all three registers are cleared on a + * single byte write, so we just use 0x0 to clear. + */ + ret = twl_i2c_write_u8(TWL_MODULE_PIH, 0x00, REG_INT_STS_A); if (ret) pr_warning("twl6030: I2C error in clearing PIH ISR\n"); @@ -227,7 +238,7 @@ static inline void activate_irq(int irq) #endif } -int twl6030_irq_set_wake(struct irq_data *d, unsigned int on) +static int twl6030_irq_set_wake(struct irq_data *d, unsigned int on) { if (on) atomic_inc(&twl6030_wakeirqs); @@ -237,11 +248,6 @@ int twl6030_irq_set_wake(struct irq_data *d, unsigned int on) return 0; } -/*----------------------------------------------------------------------*/ - -static unsigned twl6030_irq_next; - -/*----------------------------------------------------------------------*/ int twl6030_interrupt_unmask(u8 bit_mask, u8 offset) { int ret; @@ -311,7 +317,8 @@ int twl6030_mmc_card_detect_config(void) ret); return ret; } - return 0; + + return twl6030_irq_base + MMCDETECT_INTR_OFFSET; } EXPORT_SYMBOL(twl6030_mmc_card_detect_config); @@ -340,29 +347,44 @@ int twl6030_mmc_card_detect(struct device *dev, int slot) } EXPORT_SYMBOL(twl6030_mmc_card_detect); -int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end) +int twl6030_init_irq(struct device *dev, int irq_num) { - - int status = 0; - int i; + struct device_node *node = dev->of_node; + int nr_irqs, irq_base, irq_end; struct task_struct *task; - int ret; - u8 mask[4]; + static struct irq_chip twl6030_irq_chip; + int status = 0; + int i; + u8 mask[4]; + + nr_irqs = TWL6030_NR_IRQS; + + irq_base = irq_alloc_descs(-1, 0, nr_irqs, 0); + if (IS_ERR_VALUE(irq_base)) { + dev_err(dev, "Fail to allocate IRQ descs\n"); + return irq_base; + } + + irq_domain_add_legacy(node, nr_irqs, irq_base, 0, + &irq_domain_simple_ops, NULL); + + irq_end = irq_base + nr_irqs; - static struct irq_chip twl6030_irq_chip; mask[1] = 0xFF; mask[2] = 0xFF; mask[3] = 0xFF; - ret = twl_i2c_write(TWL_MODULE_PIH, &mask[0], - REG_INT_MSK_LINE_A, 3); /* MASK ALL INT LINES */ - ret = twl_i2c_write(TWL_MODULE_PIH, &mask[0], - REG_INT_MSK_STS_A, 3); /* MASK ALL INT STS */ - ret = twl_i2c_write(TWL_MODULE_PIH, &mask[0], - REG_INT_STS_A, 3); /* clear INT_STS_A,B,C */ + + /* mask all int lines */ + twl_i2c_write(TWL_MODULE_PIH, &mask[0], REG_INT_MSK_LINE_A, 3); + /* mask all int sts */ + twl_i2c_write(TWL_MODULE_PIH, &mask[0], REG_INT_MSK_STS_A, 3); + /* clear INT_STS_A,B,C */ + twl_i2c_write(TWL_MODULE_PIH, &mask[0], REG_INT_STS_A, 3); twl6030_irq_base = irq_base; - /* install an irq handler for each of the modules; + /* + * install an irq handler for each of the modules; * clone dummy irq_chip since PIH can't *do* anything */ twl6030_irq_chip = dummy_irq_chip; @@ -377,30 +399,29 @@ int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end) activate_irq(i); } - twl6030_irq_next = i; - pr_info("twl6030: %s (irq %d) chaining IRQs %d..%d\n", "PIH", - irq_num, irq_base, twl6030_irq_next - 1); + dev_info(dev, "PIH (irq %d) chaining IRQs %d..%d\n", + irq_num, irq_base, irq_end); /* install an irq handler to demultiplex the TWL6030 interrupt */ init_completion(&irq_event); - status = request_irq(irq_num, handle_twl6030_pih, 0, - "TWL6030-PIH", &irq_event); + status = request_irq(irq_num, handle_twl6030_pih, 0, "TWL6030-PIH", + &irq_event); if (status < 0) { - pr_err("twl6030: could not claim irq%d: %d\n", irq_num, status); + dev_err(dev, "could not claim irq %d: %d\n", irq_num, status); goto fail_irq; } task = kthread_run(twl6030_irq_thread, (void *)irq_num, "twl6030-irq"); if (IS_ERR(task)) { - pr_err("twl6030: could not create irq %d thread!\n", irq_num); + dev_err(dev, "could not create irq %d thread!\n", irq_num); status = PTR_ERR(task); goto fail_kthread; } twl_irq = irq_num; register_pm_notifier(&twl6030_irq_pm_notifier_block); - return status; + return irq_base; fail_kthread: free_irq(irq_num, &irq_event); @@ -408,6 +429,7 @@ fail_kthread: fail_irq: for (i = irq_base; i < irq_end; i++) irq_set_chip_and_handler(i, NULL, NULL); + return status; } |