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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-28 13:56:35 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-28 13:56:35 -0700 |
commit | 30304e5a79d424eb2c8707b3ff0e9b8bf6ab3e8f (patch) | |
tree | 63968fb97b86861e31922515395feef8a110f884 /drivers/mfd/twl4030-irq.c | |
parent | 750f77064a290beb162352077b52c61b04bcae0e (diff) | |
parent | b8589e2a8065b8e7773742b60ae96b63b757bb69 (diff) | |
download | op-kernel-dev-30304e5a79d424eb2c8707b3ff0e9b8bf6ab3e8f.zip op-kernel-dev-30304e5a79d424eb2c8707b3ff0e9b8bf6ab3e8f.tar.gz |
Merge tag 'mfd_3.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6
Pull MFD changes from Samuel Ortiz:
- 4 new drivers: Freescale i.MX on-chip Anatop, Ricoh's RC5T583 and
TI's TPS65090 and TPS65217.
- New variants support (8420, 8520 ab9540), cleanups and bug fixes for
the abx500 and db8500 ST-E chipsets.
- Some minor fixes and update for the wm8994 from Mark.
- The beginning of a long term TWL cleanup effort coming from the TI
folks.
- Various fixes and cleanups for the s5m, TPS659xx, pm860x, and MAX8997
drivers.
Fix up trivial conflicts due to duplicate patches and header file
cleanups (<linux/device.h> removal etc).
* tag 'mfd_3.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/sameo/mfd-2.6: (97 commits)
gpio/twl: Add DT support to gpio-twl4030 driver
gpio/twl: Allocate irq_desc dynamically for SPARSE_IRQ support
mfd: Detach twl6040 from the pmic mfd driver
mfd: Replace twl-* pr_ macros by the dev_ equivalent and do various cleanups
mfd: Micro-optimization on twl4030 IRQ handler
mfd: Make twl4030 SIH SPARSE_IRQ capable
mfd: Move twl-core IRQ allocation into twl[4030|6030]-irq files
mfd: Remove references already defineid in header file from twl-core
mfd: Remove unneeded header from twl-core
mfd: Make twl-core not depend on pdata->irq_base/end
ARM: OMAP2+: board-omap4-*: Do not use anymore TWL6030_IRQ_BASE in board files
mfd: Return twl6030_mmc_card_detect IRQ for board setup
Revert "mfd: Add platform data for MAX8997 haptic driver"
mfd: Add support for TPS65090
mfd: Add some da9052-i2c section annotations
mfd: Build rtc5t583 only if I2C config is selected to y.
mfd: Add anatop mfd driver
mfd: Fix compilation error in tps65910.h
mfd: Add 8420 variant to db8500-prcmu
mfd: Add 8520 PRCMU variant to db8500-prcmu
...
Diffstat (limited to 'drivers/mfd/twl4030-irq.c')
-rw-r--r-- | drivers/mfd/twl4030-irq.c | 107 |
1 files changed, 60 insertions, 47 deletions
diff --git a/drivers/mfd/twl4030-irq.c b/drivers/mfd/twl4030-irq.c index b69bb51..5d656e8 100644 --- a/drivers/mfd/twl4030-irq.c +++ b/drivers/mfd/twl4030-irq.c @@ -28,10 +28,12 @@ */ #include <linux/init.h> +#include <linux/export.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/slab.h> - +#include <linux/of.h> +#include <linux/irqdomain.h> #include <linux/i2c/twl.h> #include "twl-core.h" @@ -53,13 +55,14 @@ * base + 8 .. base + 15 SIH for PWR_INT * base + 16 .. base + 33 SIH for GPIO */ +#define TWL4030_CORE_NR_IRQS 8 +#define TWL4030_PWR_NR_IRQS 8 /* PIH register offsets */ #define REG_PIH_ISR_P1 0x01 #define REG_PIH_ISR_P2 0x02 #define REG_PIH_SIR 0x03 /* for testing */ - /* Linux could (eventually) use either IRQ line */ static int irq_line; @@ -111,7 +114,8 @@ static int nr_sih_modules; #define TWL4030_MODULE_INT_PWR TWL4030_MODULE_INT -/* Order in this table matches order in PIH_ISR. That is, +/* + * Order in this table matches order in PIH_ISR. That is, * BIT(n) in PIH_ISR is sih_modules[n]. */ /* sih_modules_twl4030 is used both in twl4030 and twl5030 */ @@ -288,7 +292,6 @@ static unsigned twl4030_irq_base; */ static irqreturn_t handle_twl4030_pih(int irq, void *devid) { - int module_irq; irqreturn_t ret; u8 pih_isr; @@ -299,16 +302,18 @@ static irqreturn_t handle_twl4030_pih(int irq, void *devid) return IRQ_NONE; } - /* these handlers deal with the relevant SIH irq status */ - for (module_irq = twl4030_irq_base; - pih_isr; - pih_isr >>= 1, module_irq++) { - if (pih_isr & 0x1) - handle_nested_irq(module_irq); + while (pih_isr) { + unsigned long pending = __ffs(pih_isr); + unsigned int irq; + + pih_isr &= ~BIT(pending); + irq = pending + twl4030_irq_base; + handle_nested_irq(irq); } return IRQ_HANDLED; } + /*----------------------------------------------------------------------*/ /* @@ -337,7 +342,6 @@ static int twl4030_init_sih_modules(unsigned line) memset(buf, 0xff, sizeof buf); sih = sih_modules; for (i = 0; i < nr_sih_modules; i++, sih++) { - /* skip USB -- it's funky */ if (!sih->bytes_ixr) continue; @@ -352,7 +356,8 @@ static int twl4030_init_sih_modules(unsigned line) pr_err("twl4030: err %d initializing %s %s\n", status, sih->name, "IMR"); - /* Maybe disable "exclusive" mode; buffer second pending irq; + /* + * Maybe disable "exclusive" mode; buffer second pending irq; * set Clear-On-Read (COR) bit. * * NOTE that sometimes COR polarity is documented as being @@ -382,7 +387,8 @@ static int twl4030_init_sih_modules(unsigned line) if (sih->irq_lines <= line) continue; - /* Clear pending interrupt status. Either the read was + /* + * Clear pending interrupt status. Either the read was * enough, or we need to write those bits. Repeat, in * case an IRQ is pending (PENDDIS=0) ... that's not * uncommon with PWR_INT.PWRON. @@ -398,7 +404,8 @@ static int twl4030_init_sih_modules(unsigned line) status = twl_i2c_write(sih->module, buf, sih->mask[line].isr_offset, sih->bytes_ixr); - /* else COR=1 means read sufficed. + /* + * else COR=1 means read sufficed. * (for most SIH modules...) */ } @@ -410,7 +417,8 @@ static int twl4030_init_sih_modules(unsigned line) static inline void activate_irq(int irq) { #ifdef CONFIG_ARM - /* ARM requires an extra step to clear IRQ_NOREQUEST, which it + /* + * ARM requires an extra step to clear IRQ_NOREQUEST, which it * sets on behalf of every irq_chip. Also sets IRQ_NOPROBE. */ set_irq_flags(irq, IRQF_VALID); @@ -620,33 +628,24 @@ static irqreturn_t handle_twl4030_sih(int irq, void *data) return IRQ_HANDLED; } -static unsigned twl4030_irq_next; - -/* returns the first IRQ used by this SIH bank, - * or negative errno - */ -int twl4030_sih_setup(int module) +/* returns the first IRQ used by this SIH bank, or negative errno */ +int twl4030_sih_setup(struct device *dev, int module, int irq_base) { int sih_mod; const struct sih *sih = NULL; struct sih_agent *agent; int i, irq; int status = -EINVAL; - unsigned irq_base = twl4030_irq_next; /* only support modules with standard clear-on-read for now */ - for (sih_mod = 0, sih = sih_modules; - sih_mod < nr_sih_modules; + for (sih_mod = 0, sih = sih_modules; sih_mod < nr_sih_modules; sih_mod++, sih++) { if (sih->module == module && sih->set_cor) { - if (!WARN((irq_base + sih->bits) > NR_IRQS, - "irq %d for %s too big\n", - irq_base + sih->bits, - sih->name)) - status = 0; + status = 0; break; } } + if (status < 0) return status; @@ -654,8 +653,6 @@ int twl4030_sih_setup(int module) if (!agent) return -ENOMEM; - status = 0; - agent->irq_base = irq_base; agent->sih = sih; agent->imr = ~0; @@ -671,8 +668,6 @@ int twl4030_sih_setup(int module) activate_irq(irq); } - twl4030_irq_next += i; - /* replace generic PIH handler (handle_simple_irq) */ irq = sih_mod + twl4030_irq_base; irq_set_handler_data(irq, agent); @@ -680,26 +675,43 @@ int twl4030_sih_setup(int module) status = request_threaded_irq(irq, NULL, handle_twl4030_sih, 0, agent->irq_name ?: sih->name, NULL); - pr_info("twl4030: %s (irq %d) chaining IRQs %d..%d\n", sih->name, - irq, irq_base, twl4030_irq_next - 1); + dev_info(dev, "%s (irq %d) chaining IRQs %d..%d\n", sih->name, + irq, irq_base, irq_base + i - 1); return status < 0 ? status : irq_base; } /* FIXME need a call to reverse twl4030_sih_setup() ... */ - /*----------------------------------------------------------------------*/ /* FIXME pass in which interrupt line we'll use ... */ #define twl_irq_line 0 -int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end) +int twl4030_init_irq(struct device *dev, int irq_num) { static struct irq_chip twl4030_irq_chip; + int status, i; + int irq_base, irq_end, nr_irqs; + struct device_node *node = dev->of_node; - int status; - int i; + /* + * TWL core and pwr interrupts must be contiguous because + * the hwirqs numbers are defined contiguously from 1 to 15. + * Create only one domain for both. + */ + nr_irqs = TWL4030_PWR_NR_IRQS + TWL4030_CORE_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 + TWL4030_CORE_NR_IRQS; /* * Mask and clear all TWL4030 interrupts since initially we do @@ -711,7 +723,8 @@ int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end) twl4030_irq_base = irq_base; - /* install an irq handler for each of the SIH modules; + /* + * Install an irq handler for each of the SIH modules; * clone dummy irq_chip since PIH can't *do* anything */ twl4030_irq_chip = dummy_irq_chip; @@ -725,14 +738,14 @@ int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end) irq_set_nested_thread(i, 1); activate_irq(i); } - twl4030_irq_next = i; - pr_info("twl4030: %s (irq %d) chaining IRQs %d..%d\n", "PIH", - irq_num, irq_base, twl4030_irq_next - 1); + + dev_info(dev, "%s (irq %d) chaining IRQs %d..%d\n", "PIH", + irq_num, irq_base, irq_end); /* ... and the PWR_INT module ... */ - status = twl4030_sih_setup(TWL4030_MODULE_INT); + status = twl4030_sih_setup(dev, TWL4030_MODULE_INT, irq_end); if (status < 0) { - pr_err("twl4030: sih_setup PWR INT --> %d\n", status); + dev_err(dev, "sih_setup PWR INT --> %d\n", status); goto fail; } @@ -741,11 +754,11 @@ int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end) IRQF_ONESHOT, "TWL4030-PIH", NULL); if (status < 0) { - pr_err("twl4030: 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_rqirq; } - return status; + return irq_base; fail_rqirq: /* clean up twl4030_sih_setup */ fail: |