diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mfd/twl4030-irq.c | 124 |
1 files changed, 52 insertions, 72 deletions
diff --git a/drivers/mfd/twl4030-irq.c b/drivers/mfd/twl4030-irq.c index bf62389fc7e..1b9ab2f40d5 100644 --- a/drivers/mfd/twl4030-irq.c +++ b/drivers/mfd/twl4030-irq.c @@ -422,8 +422,6 @@ static inline void activate_irq(int irq) /*----------------------------------------------------------------------*/ -static struct workqueue_struct *wq; - struct sih_agent { int irq_base; const struct sih *sih; @@ -432,68 +430,10 @@ struct sih_agent { bool imr_change_pending; u32 edge_change; - struct work_struct edge_work; struct mutex irq_lock; }; -static void twl4030_sih_do_edge(struct work_struct *work) -{ - struct sih_agent *agent; - const struct sih *sih; - u8 bytes[6]; - u32 edge_change; - int status; - - agent = container_of(work, struct sih_agent, edge_work); - - /* see what work we have */ - edge_change = agent->edge_change; - agent->edge_change = 0; - sih = edge_change ? agent->sih : NULL; - if (!sih) - return; - - /* Read, reserving first byte for write scratch. Yes, this - * could be cached for some speedup ... but be careful about - * any processor on the other IRQ line, EDR registers are - * shared. - */ - status = twl_i2c_read(sih->module, bytes + 1, - sih->edr_offset, sih->bytes_edr); - if (status) { - pr_err("twl4030: %s, %s --> %d\n", __func__, - "read", status); - return; - } - - /* Modify only the bits we know must change */ - while (edge_change) { - int i = fls(edge_change) - 1; - struct irq_data *idata = irq_get_irq_data(i + agent->irq_base); - int byte = 1 + (i >> 2); - int off = (i & 0x3) * 2; - unsigned int type; - - bytes[byte] &= ~(0x03 << off); - - type = irqd_get_trigger_type(idata); - if (type & IRQ_TYPE_EDGE_RISING) - bytes[byte] |= BIT(off + 1); - if (type & IRQ_TYPE_EDGE_FALLING) - bytes[byte] |= BIT(off + 0); - - edge_change &= ~BIT(i); - } - - /* Write */ - status = twl_i2c_write(sih->module, bytes, - sih->edr_offset, sih->bytes_edr); - if (status) - pr_err("twl4030: %s, %s --> %d\n", __func__, - "write", status); -} - /*----------------------------------------------------------------------*/ /* @@ -526,10 +466,8 @@ static int twl4030_sih_set_type(struct irq_data *data, unsigned trigger) if (trigger & ~(IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING)) return -EINVAL; - if (irqd_get_trigger_type(data) != trigger) { + if (irqd_get_trigger_type(data) != trigger) agent->edge_change |= BIT(data->irq - agent->irq_base); - queue_work(wq, &agent->edge_work); - } return 0; } @@ -566,6 +504,56 @@ static void twl4030_sih_bus_sync_unlock(struct irq_data *data) "write", status); } + if (agent->edge_change) { + u32 edge_change; + u8 bytes[6]; + + edge_change = agent->edge_change; + agent->edge_change = 0; + + /* + * Read, reserving first byte for write scratch. Yes, this + * could be cached for some speedup ... but be careful about + * any processor on the other IRQ line, EDR registers are + * shared. + */ + status = twl_i2c_read(sih->module, bytes + 1, + sih->edr_offset, sih->bytes_edr); + if (status) { + pr_err("twl4030: %s, %s --> %d\n", __func__, + "read", status); + return; + } + + /* Modify only the bits we know must change */ + while (edge_change) { + int i = fls(edge_change) - 1; + struct irq_data *idata; + int byte = 1 + (i >> 2); + int off = (i & 0x3) * 2; + unsigned int type; + + idata = irq_get_irq_data(i + agent->irq_base); + + bytes[byte] &= ~(0x03 << off); + + type = irqd_get_trigger_type(idata); + if (type & IRQ_TYPE_EDGE_RISING) + bytes[byte] |= BIT(off + 1); + if (type & IRQ_TYPE_EDGE_FALLING) + bytes[byte] |= BIT(off + 0); + + edge_change &= ~BIT(i); + } + + /* Write */ + status = twl_i2c_write(sih->module, bytes, + sih->edr_offset, sih->bytes_edr); + if (status) + pr_err("twl4030: %s, %s --> %d\n", __func__, + "write", status); + } + mutex_unlock(&agent->irq_lock); } @@ -672,7 +660,6 @@ int twl4030_sih_setup(int module) agent->sih = sih; agent->imr = ~0; mutex_init(&agent->irq_lock); - INIT_WORK(&agent->edge_work, twl4030_sih_do_edge); for (i = 0; i < sih->bits; i++) { irq = irq_base + i; @@ -720,12 +707,6 @@ int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end) if (status < 0) return status; - wq = create_singlethread_workqueue("twl4030-irqchip"); - if (!wq) { - pr_err("twl4030: workqueue FAIL\n"); - return -ESRCH; - } - twl4030_irq_base = irq_base; /* install an irq handler for each of the SIH modules; @@ -766,8 +747,7 @@ fail_rqirq: fail: for (i = irq_base; i < irq_end; i++) irq_set_chip_and_handler(i, NULL, NULL); - destroy_workqueue(wq); - wq = NULL; + return status; } |