diff options
author | Balaji T K <balajitk@ti.com> | 2009-12-14 00:25:31 +0100 |
---|---|---|
committer | Samuel Ortiz <sameo@linux.intel.com> | 2009-12-14 00:25:31 +0100 |
commit | e8deb28ca8e221de0239eafb3c3d431d8854278e (patch) | |
tree | 2dffdb207366aa0a8f229775515fc207c16f8574 /drivers | |
parent | c4aa6f314328142974c78377cd9476f8ec6f0eba (diff) | |
download | kernel_samsung_smdk4412-e8deb28ca8e221de0239eafb3c3d431d8854278e.zip kernel_samsung_smdk4412-e8deb28ca8e221de0239eafb3c3d431d8854278e.tar.gz kernel_samsung_smdk4412-e8deb28ca8e221de0239eafb3c3d431d8854278e.tar.bz2 |
mfd: Add support for twl6030 irq framework
This patch adds support for phoenix interrupt framework. New iInterrupt
status register A, B, C are introduced in Phoenix and are cleared on write.
Due to the differences in interrupt handling with respect to TWL4030,
twl6030-irq.c is created for TWL6030 PMIC
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/mfd/Kconfig | 4 | ||||
-rw-r--r-- | drivers/mfd/Makefile | 2 | ||||
-rw-r--r-- | drivers/mfd/twl-core.c | 120 | ||||
-rw-r--r-- | drivers/mfd/twl4030-irq.c | 6 | ||||
-rw-r--r-- | drivers/mfd/twl6030-irq.c | 299 |
5 files changed, 411 insertions, 20 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index b23343c..8782978 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -103,10 +103,10 @@ config MENELAUS cell phones and PDAs. config TWL4030_CORE - bool "Texas Instruments TWL4030/TPS659x0 Support" + bool "Texas Instruments TWL4030/TWL5030/TWL6030/TPS659x0 Support" depends on I2C=y && GENERIC_HARDIRQS help - Say yes here if you have TWL4030 family chip on your board. + Say yes here if you have TWL4030 / TWL6030 family chip on your board. This core driver provides register access and IRQ handling facilities, and registers devices for the various functions so that function-specific drivers can bind to them. diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index f4d14b7..ca2f2c4 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -26,7 +26,7 @@ obj-$(CONFIG_MFD_WM8350_I2C) += wm8350-i2c.o obj-$(CONFIG_TPS65010) += tps65010.o obj-$(CONFIG_MENELAUS) += menelaus.o -obj-$(CONFIG_TWL4030_CORE) += twl-core.o twl4030-irq.o +obj-$(CONFIG_TWL4030_CORE) += twl-core.o twl4030-irq.o twl6030-irq.o obj-$(CONFIG_TWL4030_POWER) += twl4030-power.o obj-$(CONFIG_TWL4030_CODEC) += twl4030-codec.o diff --git a/drivers/mfd/twl-core.c b/drivers/mfd/twl-core.c index 79946fe..c48a613 100644 --- a/drivers/mfd/twl-core.c +++ b/drivers/mfd/twl-core.c @@ -181,6 +181,30 @@ /* Triton Core internal information (END) */ +/* subchip/slave 0 0x48 - POWER */ +#define TWL6030_BASEADD_RTC 0x0000 +#define TWL6030_BASEADD_MEM 0x0017 +#define TWL6030_BASEADD_PM_MASTER 0x001F +#define TWL6030_BASEADD_PM_SLAVE_MISC 0x0030 /* PM_RECEIVER */ +#define TWL6030_BASEADD_PM_MISC 0x00E2 +#define TWL6030_BASEADD_PM_PUPD 0x00F0 + +/* subchip/slave 1 0x49 - FEATURE */ +#define TWL6030_BASEADD_USB 0x0000 +#define TWL6030_BASEADD_GPADC_CTRL 0x002E +#define TWL6030_BASEADD_AUX 0x0090 +#define TWL6030_BASEADD_PWM 0x00BA +#define TWL6030_BASEADD_GASGAUGE 0x00C0 +#define TWL6030_BASEADD_PIH 0x00D0 +#define TWL6030_BASEADD_CHARGER 0x00E0 + +/* subchip/slave 2 0x4A - DFT */ +#define TWL6030_BASEADD_DIEID 0x00C0 + +/* subchip/slave 3 0x4B - AUDIO */ +#define TWL6030_BASEADD_AUDIO 0x0000 +#define TWL6030_BASEADD_RSV 0x0000 + /* Few power values */ #define R_CFG_BOOT 0x05 #define R_PROTECT_KEY 0x0E @@ -202,13 +226,21 @@ #define TWL4030_VAUX2 BIT(0) /* pre-5030 voltage ranges */ #define TPS_SUBSET BIT(1) /* tps659[23]0 have fewer LDOs */ #define TWL5031 BIT(2) /* twl5031 has different registers */ +#define TWL6030_CLASS BIT(3) /* TWL6030 class */ /*----------------------------------------------------------------------*/ /* is driver active, bound to a chip? */ static bool inuse; -/* Structure for each TWL4030 Slave */ +static unsigned int twl_id; +unsigned int twl_rev(void) +{ + return twl_id; +} +EXPORT_SYMBOL(twl_rev); + +/* Structure for each TWL4030/TWL6030 Slave */ struct twl_client { struct i2c_client *client; u8 address; @@ -228,11 +260,12 @@ struct twl_mapping { unsigned char sid; /* Slave ID */ unsigned char base; /* base address */ }; +struct twl_mapping *twl_map; static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = { /* * NOTE: don't change this table without updating the - * <linux/i2c/twl4030.h> defines for TWL4030_MODULE_* + * <linux/i2c/twl.h> defines for TWL4030_MODULE_* * so they continue to match the order in this table. */ @@ -265,6 +298,40 @@ static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = { { 3, TWL4030_BASEADD_SECURED_REG }, }; +static struct twl_mapping twl6030_map[] = { + /* + * NOTE: don't change this table without updating the + * <linux/i2c/twl.h> defines for TWL4030_MODULE_* + * so they continue to match the order in this table. + */ + { SUB_CHIP_ID1, TWL6030_BASEADD_USB }, + { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO }, + { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID }, + { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, + { SUB_CHIP_ID1, TWL6030_BASEADD_PIH }, + + { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, + { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, + { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL }, + { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, + { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, + + { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER }, + { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE }, + { SUB_CHIP_ID1, TWL6030_BASEADD_PWM }, + { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, + { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, + + { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, + { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, + { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, + { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER }, + { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC }, + + { SUB_CHIP_ID0, TWL6030_BASEADD_RTC }, + { SUB_CHIP_ID0, TWL6030_BASEADD_MEM }, +}; + /*----------------------------------------------------------------------*/ /* Exported Functions */ @@ -292,7 +359,7 @@ int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); return -EPERM; } - sid = twl4030_map[mod_no].sid; + sid = twl_map[mod_no].sid; twl = &twl_modules[sid]; if (unlikely(!inuse)) { @@ -310,7 +377,7 @@ int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) msg->flags = 0; msg->buf = value; /* over write the first byte of buffer with the register address */ - *value = twl4030_map[mod_no].base + reg; + *value = twl_map[mod_no].base + reg; ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1); mutex_unlock(&twl->xfer_lock); @@ -349,7 +416,7 @@ int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); return -EPERM; } - sid = twl4030_map[mod_no].sid; + sid = twl_map[mod_no].sid; twl = &twl_modules[sid]; if (unlikely(!inuse)) { @@ -362,7 +429,7 @@ int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) msg->addr = twl->address; msg->len = 1; msg->flags = 0; /* Read the register value */ - val = twl4030_map[mod_no].base + reg; + val = twl_map[mod_no].base + reg; msg->buf = &val; /* [MSG2] fill the data rx buffer */ msg = &twl->xfer_msg[1]; @@ -486,6 +553,7 @@ add_regulator_linked(int num, struct regulator_init_data *pdata, struct regulator_consumer_supply *consumers, unsigned num_consumers) { + unsigned sub_chip_id; /* regulator framework demands init_data ... */ if (!pdata) return NULL; @@ -496,7 +564,8 @@ add_regulator_linked(int num, struct regulator_init_data *pdata, } /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */ - return add_numbered_child(3, "twl_reg", num, + sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid; + return add_numbered_child(sub_chip_id, "twl_reg", num, pdata, sizeof(*pdata), false, 0, 0); } @@ -516,6 +585,7 @@ static int add_children(struct twl4030_platform_data *pdata, unsigned long features) { struct device *child; + unsigned sub_chip_id; if (twl_has_bci() && pdata->bci && !(features & (TPS_SUBSET | TWL5031))) { @@ -561,7 +631,8 @@ add_children(struct twl4030_platform_data *pdata, unsigned long features) * Eventually, Linux might become more aware of such * HW security concerns, and "least privilege". */ - child = add_child(3, "twl_rtc", + sub_chip_id = twl_map[TWL_MODULE_RTC].sid; + child = add_child(sub_chip_id, "twl_rtc", NULL, 0, true, pdata->irq_base + RTC_INTR_OFFSET, 0); if (IS_ERR(child)) @@ -812,16 +883,22 @@ static void clocks_init(struct device *dev, /*----------------------------------------------------------------------*/ -int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end); -int twl_exit_irq(void); -int twl_init_chip_irq(const char *chip); +int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end); +int twl4030_exit_irq(void); +int twl4030_init_chip_irq(const char *chip); +int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end); +int twl6030_exit_irq(void); static int twl_remove(struct i2c_client *client) { unsigned i; int status; - status = twl_exit_irq(); + if (twl_class_is_4030()) + status = twl4030_exit_irq(); + else + status = twl6030_exit_irq(); + if (status < 0) return status; @@ -878,6 +955,13 @@ twl_probe(struct i2c_client *client, const struct i2c_device_id *id) mutex_init(&twl->xfer_lock); } inuse = true; + if ((id->driver_data) & TWL6030_CLASS) { + twl_id = TWL6030_CLASS_ID; + twl_map = &twl6030_map[0]; + } else { + twl_id = TWL4030_CLASS_ID; + twl_map = &twl4030_map[0]; + } /* setup clock framework */ clocks_init(&client->dev, pdata->clock); @@ -890,8 +974,15 @@ twl_probe(struct i2c_client *client, const struct i2c_device_id *id) if (client->irq && pdata->irq_base && pdata->irq_end > pdata->irq_base) { - twl_init_chip_irq(id->name); - status = twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end); + if (twl_class_is_4030()) { + twl4030_init_chip_irq(id->name); + status = twl4030_init_irq(client->irq, pdata->irq_base, + pdata->irq_end); + } else { + status = twl6030_init_irq(client->irq, pdata->irq_base, + pdata->irq_end); + } + if (status < 0) goto fail; } @@ -910,6 +1001,7 @@ static const struct i2c_device_id twl_ids[] = { { "tps65950", 0 }, /* catalog version of twl5030 */ { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */ { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */ + { "twl6030", TWL6030_CLASS }, /* "Phoenix power chip" */ { /* end of list */ }, }; MODULE_DEVICE_TABLE(i2c, twl_ids); diff --git a/drivers/mfd/twl4030-irq.c b/drivers/mfd/twl4030-irq.c index 5a62cf9..20d29ba 100644 --- a/drivers/mfd/twl4030-irq.c +++ b/drivers/mfd/twl4030-irq.c @@ -778,7 +778,7 @@ int twl4030_sih_setup(int module) /* FIXME pass in which interrupt line we'll use ... */ #define twl_irq_line 0 -int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end) +int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end) { static struct irq_chip twl4030_irq_chip; @@ -858,7 +858,7 @@ fail: return status; } -int twl_exit_irq(void) +int twl4030_exit_irq(void) { /* FIXME undo twl_init_irq() */ if (twl4030_irq_base) { @@ -868,7 +868,7 @@ int twl_exit_irq(void) return 0; } -int twl_init_chip_irq(const char *chip) +int twl4030_init_chip_irq(const char *chip) { if (!strcmp(chip, "twl5031")) { sih_modules = sih_modules_twl5031; diff --git a/drivers/mfd/twl6030-irq.c b/drivers/mfd/twl6030-irq.c new file mode 100644 index 0000000..10bf228 --- /dev/null +++ b/drivers/mfd/twl6030-irq.c @@ -0,0 +1,299 @@ +/* + * twl6030-irq.c - TWL6030 irq support + * + * Copyright (C) 2005-2009 Texas Instruments, Inc. + * + * Modifications to defer interrupt handling to a kernel thread: + * Copyright (C) 2006 MontaVista Software, Inc. + * + * Based on tlv320aic23.c: + * Copyright (c) by Kai Svahn <kai.svahn@nokia.com> + * + * Code cleanup and modifications to IRQ handler. + * by syed khasim <x0khasim@ti.com> + * + * TWL6030 specific code and IRQ handling changes by + * Jagadeesh Bhaskar Pakaravoor <j-pakaravoor@ti.com> + * Balaji T K <balajitk@ti.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/kthread.h> +#include <linux/i2c/twl.h> + +/* + * TWL6030 (unlike its predecessors, which had two level interrupt handling) + * three interrupt registers INT_STS_A, INT_STS_B and INT_STS_C. + * It exposes status bits saying who has raised an interrupt. There are + * three mask registers that corresponds to these status registers, that + * enables/disables these interrupts. + * + * We set up IRQs starting at a platform-specified base. An interrupt map table, + * specifies mapping between interrupt number and the associated module. + * + */ + +static int twl6030_interrupt_mapping[24] = { + PWR_INTR_OFFSET, /* Bit 0 PWRON */ + PWR_INTR_OFFSET, /* Bit 1 RPWRON */ + PWR_INTR_OFFSET, /* Bit 2 BAT_VLOW */ + RTC_INTR_OFFSET, /* Bit 3 RTC_ALARM */ + RTC_INTR_OFFSET, /* Bit 4 RTC_PERIOD */ + HOTDIE_INTR_OFFSET, /* Bit 5 HOT_DIE */ + SMPSLDO_INTR_OFFSET, /* Bit 6 VXXX_SHORT */ + SMPSLDO_INTR_OFFSET, /* Bit 7 VMMC_SHORT */ + + SMPSLDO_INTR_OFFSET, /* Bit 8 VUSIM_SHORT */ + BATDETECT_INTR_OFFSET, /* Bit 9 BAT */ + SIMDETECT_INTR_OFFSET, /* Bit 10 SIM */ + MMCDETECT_INTR_OFFSET, /* Bit 11 MMC */ + RSV_INTR_OFFSET, /* Bit 12 Reserved */ + MADC_INTR_OFFSET, /* Bit 13 GPADC_RT_EOC */ + MADC_INTR_OFFSET, /* Bit 14 GPADC_SW_EOC */ + GASGAUGE_INTR_OFFSET, /* Bit 15 CC_AUTOCAL */ + + USBOTG_INTR_OFFSET, /* Bit 16 ID_WKUP */ + USBOTG_INTR_OFFSET, /* Bit 17 VBUS_WKUP */ + USBOTG_INTR_OFFSET, /* Bit 18 ID */ + USBOTG_INTR_OFFSET, /* Bit 19 VBUS */ + CHARGER_INTR_OFFSET, /* Bit 20 CHRG_CTRL */ + CHARGER_INTR_OFFSET, /* Bit 21 EXT_CHRG */ + CHARGER_INTR_OFFSET, /* Bit 22 INT_CHRG */ + RSV_INTR_OFFSET, /* Bit 23 Reserved */ +}; +/*----------------------------------------------------------------------*/ + +static unsigned twl6030_irq_base; + +static struct completion irq_event; + +/* + * This thread processes interrupts reported by the Primary Interrupt Handler. + */ +static int twl6030_irq_thread(void *data) +{ + long irq = (long)data; + static unsigned i2c_errors; + static const unsigned max_i2c_errors = 100; + int ret; + + current->flags |= PF_NOFREEZE; + + while (!kthread_should_stop()) { + int i; + union { + u8 bytes[4]; + u32 int_sts; + } sts; + + /* Wait for IRQ, then read PIH irq status (also blocking) */ + wait_for_completion_interruptible(&irq_event); + + /* read INT_STS_A, B and C in one shot using a burst read */ + ret = twl_i2c_read(TWL_MODULE_PIH, sts.bytes, + REG_INT_STS_A, 3); + if (ret) { + pr_warning("twl6030: I2C error %d reading PIH ISR\n", + ret); + if (++i2c_errors >= max_i2c_errors) { + printk(KERN_ERR "Maximum I2C error count" + " exceeded. Terminating %s.\n", + __func__); + break; + } + complete(&irq_event); + continue; + } + + + + sts.bytes[3] = 0; /* Only 24 bits are valid*/ + + for (i = 0; sts.int_sts; sts.int_sts >>= 1, i++) { + local_irq_disable(); + if (sts.int_sts & 0x1) { + int module_irq = twl6030_irq_base + + twl6030_interrupt_mapping[i]; + struct irq_desc *d = irq_to_desc(module_irq); + + if (!d) { + pr_err("twl6030: Invalid SIH IRQ: %d\n", + module_irq); + return -EINVAL; + } + + /* These can't be masked ... always warn + * if we get any surprises. + */ + if (d->status & IRQ_DISABLED) + note_interrupt(module_irq, d, + IRQ_NONE); + else + d->handle_irq(module_irq, d); + + } + local_irq_enable(); + } + ret = twl_i2c_write(TWL_MODULE_PIH, sts.bytes, + REG_INT_STS_A, 3); /* clear INT_STS_A */ + if (ret) + pr_warning("twl6030: I2C error in clearing PIH ISR\n"); + + enable_irq(irq); + } + + return 0; +} + +/* + * handle_twl6030_int() is the desc->handle method for the twl6030 interrupt. + * This is a chained interrupt, so there is no desc->action method for it. + * Now we need to query the interrupt controller in the twl6030 to determine + * which module is generating the interrupt request. However, we can't do i2c + * transactions in interrupt context, so we must defer that work to a kernel + * thread. All we do here is acknowledge and mask the interrupt and wakeup + * the kernel thread. + */ +static irqreturn_t handle_twl6030_pih(int irq, void *devid) +{ + disable_irq_nosync(irq); + complete(devid); + return IRQ_HANDLED; +} + +/*----------------------------------------------------------------------*/ + +static inline void activate_irq(int irq) +{ +#ifdef CONFIG_ARM + /* 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); +#else + /* same effect on other architectures */ + set_irq_noprobe(irq); +#endif +} + +/*----------------------------------------------------------------------*/ + +static unsigned twl6030_irq_next; + +/*----------------------------------------------------------------------*/ +int twl6030_interrupt_unmask(u8 bit_mask, u8 offset) +{ + int ret; + u8 unmask_value; + ret = twl_i2c_read_u8(TWL_MODULE_PIH, &unmask_value, + REG_INT_STS_A + offset); + unmask_value &= (~(bit_mask)); + ret |= twl_i2c_write_u8(TWL_MODULE_PIH, unmask_value, + REG_INT_STS_A + offset); /* unmask INT_MSK_A/B/C */ + return ret; +} +EXPORT_SYMBOL(twl6030_interrupt_unmask); + +int twl6030_interrupt_mask(u8 bit_mask, u8 offset) +{ + int ret; + u8 mask_value; + ret = twl_i2c_read_u8(TWL_MODULE_PIH, &mask_value, + REG_INT_STS_A + offset); + mask_value |= (bit_mask); + ret |= twl_i2c_write_u8(TWL_MODULE_PIH, mask_value, + REG_INT_STS_A + offset); /* mask INT_MSK_A/B/C */ + return ret; +} +EXPORT_SYMBOL(twl6030_interrupt_mask); + +int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end) +{ + + int status = 0; + int i; + struct task_struct *task; + int ret; + u8 mask[4]; + + 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 */ + + twl6030_irq_base = irq_base; + + /* 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; + twl6030_irq_chip.name = "twl6030"; + twl6030_irq_chip.set_type = NULL; + + for (i = irq_base; i < irq_end; i++) { + set_irq_chip_and_handler(i, &twl6030_irq_chip, + handle_simple_irq); + 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); + + /* install an irq handler to demultiplex the TWL6030 interrupt */ + init_completion(&irq_event); + 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); + status = PTR_ERR(task); + goto fail_kthread; + } + + status = request_irq(irq_num, handle_twl6030_pih, IRQF_DISABLED, + "TWL6030-PIH", &irq_event); + if (status < 0) { + pr_err("twl6030: could not claim irq%d: %d\n", irq_num, status); + goto fail_irq; + } + return status; +fail_irq: + free_irq(irq_num, &irq_event); + +fail_kthread: + for (i = irq_base; i < irq_end; i++) + set_irq_chip_and_handler(i, NULL, NULL); + return status; +} + +int twl6030_exit_irq(void) +{ + + if (twl6030_irq_base) { + pr_err("twl6030: can't yet clean up IRQs?\n"); + return -ENOSYS; + } + return 0; +} + |