[Qualcomm PM8921 MFD v2 2/6] mfd: pm8xxx: Add irq support
From: adharmap
Date: Tue Mar 08 2011 - 01:12:01 EST
From: Abhijeet Dharmapurikar <adharmap@xxxxxxxxxxxxxx>
Add support for the irq controller in Qualcomm 8xxx pmic. The 8xxx
interrupt controller provides control for gpio and mpp configured as
interrupts in addition to other subdevice interrupts. The interrupt
controller also provides a way to read the real time status of an
interrupt. This real time status is the only way one can get the
input values of gpio and mpp lines.
Signed-off-by: Abhijeet Dharmapurikar <adharmap@xxxxxxxxxxxxxx>
---
drivers/mfd/Kconfig | 10 +
drivers/mfd/Makefile | 1 +
drivers/mfd/pm8921-core.c | 85 ++++++
drivers/mfd/pm8xxx-irq.c | 551 +++++++++++++++++++++++++++++++++++++++
include/linux/mfd/pm8921.h | 4 +
include/linux/mfd/pm8xxx/core.h | 9 +
include/linux/mfd/pm8xxx/irq.h | 81 ++++++
7 files changed, 741 insertions(+), 0 deletions(-)
create mode 100644 drivers/mfd/pm8xxx-irq.c
create mode 100644 include/linux/mfd/pm8xxx/irq.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 46f0d2f..318e42a 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -642,6 +642,16 @@ config MFD_PM8921_CORE
Say M here if you want to include support for PM8921 chip as a module.
This will build a module called "pm8921-core.ko".
+config MFD_PM8XXX_IRQ
+ bool "Support for Qualcomm PM8xxx IRQ features"
+ depends on MFD_PM8XXX
+ default y if MFD_PM8XXX
+ help
+ This is the IRQ driver for Qualcomm PM 8xxx PMIC chips.
+
+ This is required to use certain other PM 8xxx features, such as GPIO
+ and MPP.
+
endif # MFD_SUPPORT
menu "Multimedia Capabilities Port drivers"
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index ec158da..5fc9315 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -84,3 +84,4 @@ obj-$(CONFIG_MFD_VX855) += vx855.o
obj-$(CONFIG_MFD_WL1273_CORE) += wl1273-core.o
obj-$(CONFIG_MFD_CS5535) += cs5535-mfd.o
obj-$(CONFIG_MFD_PM8921_CORE) += pm8921-core.o
+obj-$(CONFIG_MFD_PM8XXX_IRQ) += pm8xxx-irq.o
diff --git a/drivers/mfd/pm8921-core.c b/drivers/mfd/pm8921-core.c
index 06c39e1..d554551 100644
--- a/drivers/mfd/pm8921-core.c
+++ b/drivers/mfd/pm8921-core.c
@@ -15,6 +15,7 @@
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
+#include <linux/err.h>
#include <linux/msm_ssbi.h>
#include <linux/mfd/core.h>
#include <linux/mfd/pm8921.h>
@@ -25,6 +26,7 @@
struct pm8921 {
struct device *dev;
+ void *irq_data;
};
static int pm8921_readb(const struct device *dev, u16 addr, u8 *val)
@@ -61,11 +63,74 @@ static int pm8921_write_buf(const struct device *dev, u16 addr, u8 *buf,
return msm_ssbi_write(pmic->dev->parent, addr, buf, cnt);
}
+static int pm8921_read_irq_stat(const struct device *dev, int irq)
+{
+ const struct pm8xxx_drvdata *pm8921_drvdata = dev_get_drvdata(dev);
+ const struct pm8921 *pmic = pm8921_drvdata->pm_chip_data;
+
+ return pm8xxx_get_irq_stat(pmic->irq_data, irq);
+}
+
static struct pm8xxx_drvdata pm8921_drvdata = {
.pmic_readb = pm8921_readb,
.pmic_writeb = pm8921_writeb,
.pmic_read_buf = pm8921_read_buf,
.pmic_write_buf = pm8921_write_buf,
+ .pmic_read_irq_stat = pm8921_read_irq_stat,
+};
+
+static int __devinit pm8921_add_subdevices(const struct pm8921_platform_data
+ *pdata,
+ struct pm8921 *pmic,
+ u32 rev)
+{
+ int ret = 0;
+ int irq_base = 0;
+ void *irq_data;
+
+ if (pdata->irq_pdata) {
+ pdata->irq_pdata->irq_cdata.nirqs = PM8921_NR_IRQS;
+ pdata->irq_pdata->irq_cdata.rev = rev;
+ irq_base = pdata->irq_pdata->irq_base;
+ irq_data = pm8xxx_irq_init(pmic->dev, pdata->irq_pdata);
+
+ if (IS_ERR(irq_data)) {
+ pr_err("Failed to init interrupts ret=%ld\n",
+ PTR_ERR(irq_data));
+ ret = PTR_ERR(irq_data);
+ goto bail;
+ } else
+ pmic->irq_data = irq_data;
+ }
+
+bail:
+ return ret;
+}
+
+#ifdef CONFIG_PM
+static int pm8921_suspend(const struct device *dev)
+{
+ const struct pm8xxx_drvdata *drvdata = dev_get_drvdata(dev);
+ const struct pm8921 *pmic = drvdata->pm_chip_data;
+
+ pm8xxx_suspend_irq(pmic->irq_data);
+}
+
+static int pm8921_resume(const struct device *dev)
+{
+ const struct pm8xxx_drvdata *drvdata = dev_get_drvdata(dev);
+ const struct pm8921 *pmic = drvdata->pm_chip_data;
+
+ pm8xxx_resume_irq(pmic->irq_data);
+}
+#else
+#define pm8921_suspend NULL
+#define pm8921_resume NULL
+#endif
+
+static const struct dev_pm_ops pm8921_pm = {
+ .suspend = pm8921_suspend,
+ .resume = pm8921_resume,
};
static int __devinit pm8921_probe(struct platform_device *pdev)
@@ -74,6 +139,7 @@ static int __devinit pm8921_probe(struct platform_device *pdev)
struct pm8921 *pmic;
int rc;
u8 val;
+ u32 rev;
if (!pdata) {
pr_err("missing platform data\n");
@@ -93,6 +159,7 @@ static int __devinit pm8921_probe(struct platform_device *pdev)
goto err_read_rev;
}
pr_info("PMIC revision 1: %02X\n", val);
+ rev = val;
/* Read PMIC chip revision 2 */
rc = msm_ssbi_read(pdev->dev.parent, REG_HWREV_2, &val, sizeof(val));
@@ -102,13 +169,26 @@ static int __devinit pm8921_probe(struct platform_device *pdev)
goto err_read_rev;
}
pr_info("PMIC revision 2: %02X\n", val);
+ rev |= val << BITS_PER_BYTE;
pmic->dev = &pdev->dev;
pm8921_drvdata.pm_chip_data = pmic;
platform_set_drvdata(pdev, &pm8921_drvdata);
+ rc = pm8921_add_subdevices(pdata, pmic, rev);
+ if (rc) {
+ pr_err("Cannot add subdevices rc=%d\n", rc);
+ goto err;
+ }
+
+ /* gpio might not work if no irq device is found */
+ WARN_ON(pmic->irq_data == NULL);
+
return 0;
+err:
+ mfd_remove_devices(pmic->dev);
+ platform_set_drvdata(pdev, NULL);
err_read_rev:
kfree(pmic);
return rc;
@@ -124,6 +204,10 @@ static int __devexit pm8921_remove(struct platform_device *pdev)
pmic = drvdata->pm_chip_data;
if (pmic)
mfd_remove_devices(pmic->dev);
+ if (pmic->irq_data) {
+ pm8xxx_irq_exit(pmic->irq_data);
+ pmic->irq_data = NULL;
+ }
platform_set_drvdata(pdev, NULL);
kfree(pmic);
@@ -136,6 +220,7 @@ static struct platform_driver pm8921_driver = {
.driver = {
.name = "pm8921-core",
.owner = THIS_MODULE,
+ .pm = &pm8921_pm,
},
};
diff --git a/drivers/mfd/pm8xxx-irq.c b/drivers/mfd/pm8xxx-irq.c
new file mode 100644
index 0000000..0bf15d4
--- /dev/null
+++ b/drivers/mfd/pm8xxx-irq.c
@@ -0,0 +1,551 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+
+#define pr_fmt(fmt) "%s: " fmt, __func__
+
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/mfd/pm8xxx/core.h>
+#include <linux/mfd/pm8xxx/irq.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/ratelimit.h>
+
+/* PMIC8xxx IRQ */
+
+#define SSBI_REG_ADDR_IRQ_BASE 0x1BB
+
+#define SSBI_REG_ADDR_IRQ_ROOT (SSBI_REG_ADDR_IRQ_BASE + 0)
+#define SSBI_REG_ADDR_IRQ_M_STATUS1 (SSBI_REG_ADDR_IRQ_BASE + 1)
+#define SSBI_REG_ADDR_IRQ_M_STATUS2 (SSBI_REG_ADDR_IRQ_BASE + 2)
+#define SSBI_REG_ADDR_IRQ_M_STATUS3 (SSBI_REG_ADDR_IRQ_BASE + 3)
+#define SSBI_REG_ADDR_IRQ_M_STATUS4 (SSBI_REG_ADDR_IRQ_BASE + 4)
+#define SSBI_REG_ADDR_IRQ_BLK_SEL (SSBI_REG_ADDR_IRQ_BASE + 5)
+#define SSBI_REG_ADDR_IRQ_IT_STATUS (SSBI_REG_ADDR_IRQ_BASE + 6)
+#define SSBI_REG_ADDR_IRQ_CONFIG (SSBI_REG_ADDR_IRQ_BASE + 7)
+#define SSBI_REG_ADDR_IRQ_RT_STATUS (SSBI_REG_ADDR_IRQ_BASE + 8)
+
+#define PM_IRQF_LVL_SEL 0x01 /* level select */
+#define PM_IRQF_MASK_FE 0x02 /* mask falling edge */
+#define PM_IRQF_MASK_RE 0x04 /* mask rising edge */
+#define PM_IRQF_CLR 0x08 /* clear interrupt */
+#define PM_IRQF_BITS_MASK 0x70
+#define PM_IRQF_BITS_SHIFT 4
+#define PM_IRQF_WRITE 0x80
+
+#define PM_IRQF_MASK_ALL (PM_IRQF_MASK_FE | \
+ PM_IRQF_MASK_RE)
+#define PM_IRQF_W_C_M (PM_IRQF_WRITE | \
+ PM_IRQF_CLR | \
+ PM_IRQF_MASK_ALL)
+
+struct pm_irq_chip {
+ struct list_head link;
+ struct device *dev;
+ spinlock_t pm_irq_lock;
+ u8 *irqs_allowed;
+ u16 *irqs_to_handle;
+ u8 *config;
+ unsigned long *wake_enable;
+ unsigned int devirq;
+ unsigned int count_wakeable;
+ unsigned int irq_base;
+ unsigned int num_irqs;
+ unsigned int num_blocks;
+ unsigned int num_masters;
+};
+
+static LIST_HEAD(pm_irq_chips);
+
+/* Helper Functions */
+static DEFINE_RATELIMIT_STATE(pm8xxx_irq_ratelimit, 60 * HZ, 10);
+
+static inline int pm8xxx_can_print(void)
+{
+ return __ratelimit(&pm8xxx_irq_ratelimit);
+}
+
+static int
+pm8xxx_read_root_irq(const struct pm_irq_chip *chip, u8 *rp)
+{
+ return pm8xxx_readb(chip->dev, SSBI_REG_ADDR_IRQ_ROOT, rp);
+}
+
+static int
+pm8xxx_read_master_irq(const struct pm_irq_chip *chip, u8 m, u8 *bp)
+{
+ return pm8xxx_readb(chip->dev,
+ SSBI_REG_ADDR_IRQ_M_STATUS1 + m, bp);
+}
+
+static int
+pm8xxx_read_block_irq(const struct pm_irq_chip *chip, u8 bp, u8 *ip)
+{
+ int rc;
+
+ rc = pm8xxx_writeb(chip->dev,
+ SSBI_REG_ADDR_IRQ_BLK_SEL, bp);
+ if (rc) {
+ pr_err("Failed Selecting Block %d rc=%d\n", bp, rc);
+ goto bail_out;
+ }
+
+ rc = pm8xxx_readb(chip->dev,
+ SSBI_REG_ADDR_IRQ_IT_STATUS, ip);
+ if (rc)
+ pr_err("Failed Reading Status rc=%d\n", rc);
+bail_out:
+ return rc;
+}
+
+static int
+pm8xxx_config_irq(const struct pm_irq_chip *chip, u8 bp, u8 cp)
+{
+ int rc;
+
+ rc = pm8xxx_writeb(chip->dev,
+ SSBI_REG_ADDR_IRQ_BLK_SEL, bp);
+ if (rc) {
+ pr_err("Failed Selecting Block %d rc=%d\n", bp, rc);
+ goto bail_out;
+ }
+
+ rc = pm8xxx_writeb(chip->dev,
+ SSBI_REG_ADDR_IRQ_CONFIG, cp);
+ if (rc)
+ pr_err("Failed Configuring IRQ rc=%d\n", rc);
+bail_out:
+ return rc;
+}
+
+static int pm8xxx_irq_block_handler(struct pm_irq_chip *chip,
+ int block, int *handled)
+{
+ int ret = 0;
+ u8 bits;
+ int pmirq, irq, k;
+
+ spin_lock(&chip->pm_irq_lock);
+ ret = pm8xxx_read_block_irq(chip, block, &bits);
+ if (ret) {
+ if (pm8xxx_can_print())
+ pr_err("Failed reading %d block ret=%d",
+ block, ret);
+ goto out;
+ }
+ if (!bits) {
+ if (pm8xxx_can_print())
+ pr_err("block bit set in master but no irqs: %d",
+ block);
+ goto out;
+ }
+
+ /* Check IRQ bits */
+ for (k = 0; k < 8; k++) {
+ if (bits & (1 << k)) {
+ pmirq = block * 8 + k;
+ irq = pmirq + chip->irq_base;
+ chip->irqs_to_handle[*handled] = irq;
+ (*handled)++;
+ }
+ }
+out:
+ spin_unlock(&chip->pm_irq_lock);
+ return ret;
+}
+
+static int pm8xxx_irq_master_handler(struct pm_irq_chip *chip,
+ int master, int *handled)
+{
+ int ret = 0;
+ u8 blockbits;
+ int block_number, j;
+
+ ret = pm8xxx_read_master_irq(chip, master, &blockbits);
+ if (ret) {
+ pr_err("Failed to read master %d ret=%d\n", master, ret);
+ return ret;
+ }
+ if (!blockbits) {
+ if (pm8xxx_can_print())
+ pr_err("master bit set in root but no blocks: %d",
+ master);
+ return 0;
+ }
+
+ for (j = 0; j < 8; j++)
+ if (blockbits & (1 << j)) {
+ block_number = master * 8 + j; /* block # */
+ ret |= pm8xxx_irq_block_handler(chip, block_number,
+ handled);
+ }
+ return ret;
+}
+
+static void pm8xxx_irq_handler(unsigned int irq, struct irq_desc *desc)
+{
+ struct pm_irq_chip *chip = get_irq_data(irq);
+ int i, ret;
+ u8 root;
+ int masters = 0, handled = 0;
+
+ ret = pm8xxx_read_root_irq(chip, &root);
+ if (ret) {
+ pr_err("Can't read root status ret=%d\n", ret);
+ return;
+ }
+
+ /* on pm8xxx series masters start from bit 1 of the root */
+ masters = root >> 1;
+
+ /* Read allowed masters for blocks. */
+ for (i = 0; i < chip->num_masters; i++)
+ if (masters & (1 << i))
+ pm8xxx_irq_master_handler(chip, i, &handled);
+
+ for (i = 0; i < handled; i++)
+ generic_handle_irq(chip->irqs_to_handle[i]);
+
+ desc->chip->ack(irq);
+}
+
+static void pm8xxx_irq_ack(struct irq_data *d)
+{
+ const struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
+ unsigned int pmirq = d->irq - chip->irq_base;
+ u8 block, config;
+
+ block = pmirq / 8;
+
+ config = PM_IRQF_WRITE | chip->config[pmirq] | PM_IRQF_CLR;
+ /* Keep the mask */
+ if (!(chip->irqs_allowed[block] & (1 << (pmirq % 8))))
+ config |= PM_IRQF_MASK_FE | PM_IRQF_MASK_RE;
+ pm8xxx_config_irq(chip, block, config);
+}
+
+static void pm8xxx_irq_mask(struct irq_data *d)
+{
+ const struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
+ unsigned int pmirq = d->irq - chip->irq_base;
+ int master, irq_bit;
+ u8 block, config;
+
+ block = pmirq / 8;
+ master = block / 8;
+ irq_bit = pmirq % 8;
+
+ chip->irqs_allowed[block] &= ~(1 << irq_bit);
+
+ config = PM_IRQF_WRITE | chip->config[pmirq] |
+ PM_IRQF_MASK_FE | PM_IRQF_MASK_RE;
+ pm8xxx_config_irq(chip, block, config);
+}
+
+static void pm8xxx_irq_unmask(struct irq_data *d)
+{
+ const struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
+ unsigned int pmirq = d->irq - chip->irq_base;
+ int master, irq_bit;
+ u8 block, config, old_irqs_allowed;
+
+ block = pmirq / 8;
+ master = block / 8;
+ irq_bit = pmirq % 8;
+
+ old_irqs_allowed = chip->irqs_allowed[block];
+ chip->irqs_allowed[block] |= 1 << irq_bit;
+
+ config = PM_IRQF_WRITE | chip->config[pmirq];
+ pm8xxx_config_irq(chip, block, config);
+}
+
+static int pm8xxx_irq_set_type(struct irq_data *d, unsigned int flow_type)
+{
+ const struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
+ unsigned int pmirq = d->irq - chip->irq_base;
+ int master, irq_bit;
+ u8 block, config;
+
+ block = pmirq / 8;
+ master = block / 8;
+ irq_bit = pmirq % 8;
+
+ chip->config[pmirq] = (irq_bit << PM_IRQF_BITS_SHIFT) |
+ PM_IRQF_MASK_RE | PM_IRQF_MASK_FE;
+ if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) {
+ if (flow_type & IRQF_TRIGGER_RISING)
+ chip->config[pmirq] &= ~PM_IRQF_MASK_RE;
+ if (flow_type & IRQF_TRIGGER_FALLING)
+ chip->config[pmirq] &= ~PM_IRQF_MASK_FE;
+ } else {
+ chip->config[pmirq] |= PM_IRQF_LVL_SEL;
+
+ if (flow_type & IRQF_TRIGGER_HIGH)
+ chip->config[pmirq] &= ~PM_IRQF_MASK_RE;
+ else
+ chip->config[pmirq] &= ~PM_IRQF_MASK_FE;
+ }
+
+ config = PM_IRQF_WRITE
+ | chip->config[pmirq] | PM_IRQF_CLR;
+ return pm8xxx_config_irq(chip, block, config);
+}
+
+static int pm8xxx_irq_set_wake(struct irq_data *d, unsigned int on)
+{
+ struct pm_irq_chip *chip = irq_data_get_irq_chip_data(d);
+ unsigned int pmirq = d->irq - chip->irq_base;
+
+ if (on) {
+ set_bit(pmirq, chip->wake_enable);
+ chip->count_wakeable++;
+ } else {
+ clear_bit(pmirq, chip->wake_enable);
+ chip->count_wakeable--;
+ }
+
+ return 0;
+}
+
+static struct irq_chip pm8xxx_irq_chip = {
+ .name = "pm8xxx",
+ .irq_ack = pm8xxx_irq_ack,
+ .irq_mask = pm8xxx_irq_mask,
+ .irq_unmask = pm8xxx_irq_unmask,
+ .irq_set_type = pm8xxx_irq_set_type,
+ .irq_set_wake = pm8xxx_irq_set_wake,
+};
+
+int pm8xxx_get_irq_stat(void *data, int irq)
+{
+ struct pm_irq_chip *chip = data;
+ int pmirq;
+ int rc;
+ u8 block, bits, bit;
+ unsigned long flags;
+
+ if (chip == NULL || irq < chip->irq_base ||
+ irq >= chip->irq_base + chip->num_irqs)
+ return -EINVAL;
+
+ pmirq = irq - chip->irq_base;
+
+ block = pmirq / 8;
+ bit = pmirq % 8;
+
+ spin_lock_irqsave(&chip->pm_irq_lock, flags);
+
+ rc = pm8xxx_writeb(chip->dev,
+ SSBI_REG_ADDR_IRQ_BLK_SEL, block);
+ if (rc) {
+ pr_err("Failed Selecting block irq=%d pmirq=%d blk=%d rc=%d\n",
+ irq, pmirq, block, rc);
+ goto bail_out;
+ }
+
+ rc = pm8xxx_readb(chip->dev,
+ SSBI_REG_ADDR_IRQ_RT_STATUS, &bits);
+ if (rc) {
+ pr_err("Failed Configuring irq=%d pmirq=%d blk=%d rc=%d\n",
+ irq, pmirq, block, rc);
+ goto bail_out;
+ }
+
+ rc = (bits & (1 << bit)) ? 1 : 0;
+
+bail_out:
+ spin_unlock_irqrestore(&chip->pm_irq_lock, flags);
+
+ return rc;
+}
+EXPORT_SYMBOL(pm8xxx_get_irq_stat);
+
+#ifdef CONFIG_PM
+int pm8xxx_suspend_irq(const void *data)
+{
+ const struct pm_irq_chip *chip = data;
+ int pmirq;
+
+ for (pmirq = 0; pmirq < chip->num_irqs; pmirq++) {
+ if (chip->config[i] && !test_bit(i, chip->wake_enable)) {
+ if (!((chip->config[i] & PM_IRQF_MASK_ALL)
+ == PM_IRQF_MASK_ALL)) {
+ irq = i + chip->irq_base;
+ pm8xxx_irq_mask(get_irq_data(irq));
+ }
+ }
+ }
+
+ if (!chip->count_wakeable)
+ disable_irq(chip->dev->irq);
+
+ return 0;
+}
+
+void pm8xxx_show_resume_irq(void)
+{
+ struct pm_irq_chip *chip;
+ u8 block, bits;
+ int pmirq;
+
+ list_for_each_entry(chip, &pm_irq_chips, link) {
+ for (pmirq = 0; pmirq < chip->num_irqs; pmirq++) {
+ if (test_bit(pmirq, chip->wake_enable)) {
+ block = pmirq / 8;
+ if (!pm8xxx_read_block_irq(chip,
+ &block, &bits)) {
+ if (bits & (1 << (pmirq & 0x7)))
+ pr_warning("%d triggered\n",
+ pmirq + chip->pdata.irq_base);
+ }
+ }
+ }
+ }
+}
+
+int pm8xxx_resume_irq(const void *data)
+{
+ const struct pm_irq_chip *chip = data;
+ int pmirq;
+
+ for (pmirq = 0; pmirq < chip->num_irqs; pmirq++) {
+ if (chip->config[i] && !test_bit(i, chip->wake_enable)) {
+ if (!((chip->config[i] & PM_IRQF_MASK_ALL)
+ == PM_IRQF_MASK_ALL)) {
+ irq = i + chip->irq_base;
+ pm8xxx_irq_unmask(get_irq_data(irq));
+ }
+ }
+ }
+
+ if (!chip->count_wakeable)
+ enable_irq(chip->dev->irq);
+
+ return 0;
+}
+#else
+#define pm8xxx_suspend NULL
+#define pm8xxx_resume NULL
+#endif
+
+void * __devinit pm8xxx_irq_init(struct device *dev,
+ const struct pm8xxx_irq_platform_data *pdata)
+{
+ struct pm_irq_chip *chip;
+ int devirq;
+ int rc;
+ unsigned int pmirq;
+
+ if (!pdata) {
+ pr_err("No platform data\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ devirq = pdata->devirq;
+ if (devirq < 0) {
+ pr_err("missing devirq\n");
+ rc = devirq;
+ goto out;
+ }
+
+ chip = kzalloc(sizeof(struct pm_irq_chip), GFP_KERNEL);
+ if (!chip) {
+ pr_err("Cannot alloc pm_irq_chip struct\n");
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ chip->dev = dev;
+ chip->devirq = devirq;
+ chip->irq_base = pdata->irq_base;
+ chip->num_irqs = pdata->irq_cdata.nirqs;
+ chip->num_blocks = DIV_ROUND_UP(chip->num_irqs, 8);
+ chip->num_masters = DIV_ROUND_UP(chip->num_blocks, 8);
+ spin_lock_init(&chip->pm_irq_lock);
+
+ chip->irqs_allowed = kzalloc(sizeof(u8) * chip->num_blocks, GFP_KERNEL);
+ if (!chip->irqs_allowed) {
+ pr_err("Cannot alloc irqs_allowed array\n");
+ rc = -ENOMEM;
+ goto free_pm_irq_chip;
+ }
+
+ chip->irqs_to_handle = kzalloc(sizeof(u16) * chip->num_irqs,
+ GFP_KERNEL);
+ if (!chip->irqs_to_handle) {
+ pr_err("Cannot alloc irqs_to_handle array\n");
+ rc = -ENOMEM;
+ goto free_irqs_allowed;
+ }
+ chip->config = kzalloc(sizeof(u8) * chip->num_irqs, GFP_KERNEL);
+ if (!chip->config) {
+ pr_err("Cannot alloc config array\n");
+ rc = -ENOMEM;
+ goto free_irqs_to_handle;
+ }
+ chip->wake_enable = kzalloc(sizeof(unsigned long)
+ * DIV_ROUND_UP(chip->num_irqs, BITS_PER_LONG),
+ GFP_KERNEL);
+ if (!chip->wake_enable) {
+ pr_err("Cannot alloc wake_enable array\n");
+ rc = -ENOMEM;
+ goto free_config;
+ }
+
+ list_add(&chip->link, &pm_irq_chips);
+
+ for (pmirq = 0; pmirq < chip->num_irqs; pmirq++) {
+ set_irq_chip(chip->irq_base + pmirq, &pm8xxx_irq_chip);
+ set_irq_chip_data(chip->irq_base + pmirq, chip);
+ set_irq_handler(chip->irq_base + pmirq, handle_level_irq);
+#ifdef CONFIG_ARM
+ set_irq_flags(chip->irq_base + pmirq, IRQF_VALID);
+#else
+ set_irq_noprobe(chip->irq_base + pmirq);
+#endif
+ }
+
+ set_irq_type(devirq, pdata->irq_trigger_flag);
+ set_irq_data(devirq, chip);
+ set_irq_chained_handler(devirq, pm8xxx_irq_handler);
+ set_irq_wake(devirq, 1);
+
+ return chip;
+
+free_config:
+ kfree(chip->config);
+free_irqs_to_handle:
+ kfree(chip->irqs_to_handle);
+free_irqs_allowed:
+ kfree(chip->irqs_allowed);
+free_pm_irq_chip:
+ kfree(chip);
+out:
+ return ERR_PTR(rc);
+}
+
+int __devexit pm8xxx_irq_exit(void *data)
+{
+ struct pm_irq_chip *chip = data;
+
+ list_del(&chip->link);
+ set_irq_chained_handler(chip->devirq, NULL);
+ kfree(chip->wake_enable);
+ kfree(chip->config);
+ kfree(chip->irqs_to_handle);
+ kfree(chip->irqs_allowed);
+ kfree(chip);
+ return 0;
+}
diff --git a/include/linux/mfd/pm8921.h b/include/linux/mfd/pm8921.h
index 6bed710..d2806ff 100644
--- a/include/linux/mfd/pm8921.h
+++ b/include/linux/mfd/pm8921.h
@@ -18,9 +18,13 @@
#define __MFD_PM8921_H
#include <linux/device.h>
+#include <linux/mfd/pm8xxx/irq.h>
+
+#define PM8921_NR_IRQS 256
struct pm8921_platform_data {
int irq_base;
+ struct pm8xxx_irq_platform_data *irq_pdata;
};
#endif
diff --git a/include/linux/mfd/pm8xxx/core.h b/include/linux/mfd/pm8xxx/core.h
index 61f1c01..e5aeecf 100644
--- a/include/linux/mfd/pm8xxx/core.h
+++ b/include/linux/mfd/pm8xxx/core.h
@@ -26,6 +26,7 @@ struct pm8xxx_drvdata {
int n);
int (*pmic_write_buf) (const struct device *dev, u16 addr, u8 *buf,
int n);
+ int (*pmic_read_irq_stat) (const struct device *dev, int irq);
void *pm_chip_data;
};
@@ -63,4 +64,12 @@ static inline int pm8xxx_write_buf(const struct device *dev, u16 addr, u8 *buf,
return dd->pmic_write_buf(dev, addr, buf, n);
}
+static inline int pm8xxx_read_irq_stat(const struct device *dev, int irq)
+{
+ struct pm8xxx_drvdata *dd = dev_get_drvdata(dev);
+
+ BUG_ON(!dd);
+ return dd->pmic_read_irq_stat(dev, irq);
+}
+
#endif
diff --git a/include/linux/mfd/pm8xxx/irq.h b/include/linux/mfd/pm8xxx/irq.h
new file mode 100644
index 0000000..298d4ff
--- /dev/null
+++ b/include/linux/mfd/pm8xxx/irq.h
@@ -0,0 +1,81 @@
+/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ */
+/*
+ * Qualcomm PMIC irq 8xxx driver header file
+ *
+ */
+
+#ifndef __MFD_PM8XXX_IRQ_H
+#define __MFD_PM8XXX_IRQ_H
+
+#include <linux/errno.h>
+#include <linux/err.h>
+
+struct pm8xxx_irq_core_data {
+ u32 rev;
+ int nirqs;
+};
+
+struct pm8xxx_irq_platform_data {
+ int irq_base;
+ struct pm8xxx_irq_core_data irq_cdata;
+ int devirq;
+ int irq_trigger_flag;
+};
+
+#ifdef CONFIG_MFD_PM8XXX_IRQ
+/**
+ * pm8xxx_get_irq_stat - get the status of the irq line
+ * @dev: the interrupt device
+ * @irq: the irq number
+ *
+ * The pm8xxx gpio and mpp rely on the interrupt block to read
+ * the values on their pins. This function is to facilitate reading
+ * the status of a gpio or an mpp line. The caller has to convert the
+ * gpio number to irq number.
+ *
+ * RETURNS:
+ * an int indicating the value read on that line
+ */
+int pm8xxx_get_irq_stat(void *data, int irq);
+void pm8xxx_show_resume_irq(void);
+void * __devinit pm8xxx_irq_init(struct device *dev,
+ const struct pm8xxx_irq_platform_data *pdata);
+int __devexit pm8xxx_irq_exit(void *data);
+
+void pm8xxx_suspend_irq(const void *data);
+void pm8xxx_resume_irq(const void *data);
+#else
+static inline int pm8xxx_get_irq_stat(void *data, int irq)
+{
+ return -ENXIO;
+}
+static inline void pm8xxx_show_resume_irq(void)
+{
+}
+static inline void * __devinit pm8xxx_irq_init(const struct device *dev,
+ const struct pm8xxx_irq_platform_data *pdata);
+{
+ return ERR_PTR(-ENXIO);
+}
+static inline int __devexit pm8xxx_irq_exit(void *data);
+{
+ return ERR_PTR(-ENXIO);
+}
+static inline void pm8xxx_suspend_irq(const void *data)
+{
+}
+static inline void pm8xxx_resume_irq(const void *data)
+{
+}
+#endif /* CONFIG_MFD_PM8XXX_IRQ */
+#endif /* __MFD_PM8XXX_IRQ_H */
--
1.7.1
Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
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