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path: root/drivers/mfd/max77620.c
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Diffstat (limited to 'drivers/mfd/max77620.c')
-rw-r--r--drivers/mfd/max77620.c75
1 files changed, 52 insertions, 23 deletions
diff --git a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c
index f32fbb8e8129..258757e216c4 100644
--- a/drivers/mfd/max77620.c
+++ b/drivers/mfd/max77620.c
@@ -31,25 +31,25 @@
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max77620.h>
-#include <linux/module.h>
+#include <linux/init.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
-static struct resource gpio_resources[] = {
+static const struct resource gpio_resources[] = {
DEFINE_RES_IRQ(MAX77620_IRQ_TOP_GPIO),
};
-static struct resource power_resources[] = {
+static const struct resource power_resources[] = {
DEFINE_RES_IRQ(MAX77620_IRQ_LBT_MBATLOW),
};
-static struct resource rtc_resources[] = {
+static const struct resource rtc_resources[] = {
DEFINE_RES_IRQ(MAX77620_IRQ_TOP_RTC),
};
-static struct resource thermal_resources[] = {
+static const struct resource thermal_resources[] = {
DEFINE_RES_IRQ(MAX77620_IRQ_LBT_TJALRM1),
DEFINE_RES_IRQ(MAX77620_IRQ_LBT_TJALRM2),
};
@@ -111,15 +111,6 @@ static const struct mfd_cell max20024_children[] = {
},
};
-static struct regmap_irq_chip max77620_top_irq_chip = {
- .name = "max77620-top",
- .irqs = max77620_top_irqs,
- .num_irqs = ARRAY_SIZE(max77620_top_irqs),
- .num_regs = 2,
- .status_base = MAX77620_REG_IRQTOP,
- .mask_base = MAX77620_REG_IRQTOPM,
-};
-
static const struct regmap_range max77620_readable_ranges[] = {
regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4),
};
@@ -180,6 +171,51 @@ static const struct regmap_config max20024_regmap_config = {
.volatile_table = &max77620_volatile_table,
};
+/*
+ * MAX77620 and MAX20024 has the following steps of the interrupt handling
+ * for TOP interrupts:
+ * 1. When interrupt occurs from PMIC, mask the PMIC interrupt by setting GLBLM.
+ * 2. Read IRQTOP and service the interrupt.
+ * 3. Once all interrupts has been checked and serviced, the interrupt service
+ * routine un-masks the hardware interrupt line by clearing GLBLM.
+ */
+static int max77620_irq_global_mask(void *irq_drv_data)
+{
+ struct max77620_chip *chip = irq_drv_data;
+ int ret;
+
+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_INTENLBT,
+ MAX77620_GLBLM_MASK, MAX77620_GLBLM_MASK);
+ if (ret < 0)
+ dev_err(chip->dev, "Failed to set GLBLM: %d\n", ret);
+
+ return ret;
+}
+
+static int max77620_irq_global_unmask(void *irq_drv_data)
+{
+ struct max77620_chip *chip = irq_drv_data;
+ int ret;
+
+ ret = regmap_update_bits(chip->rmap, MAX77620_REG_INTENLBT,
+ MAX77620_GLBLM_MASK, 0);
+ if (ret < 0)
+ dev_err(chip->dev, "Failed to reset GLBLM: %d\n", ret);
+
+ return ret;
+}
+
+static struct regmap_irq_chip max77620_top_irq_chip = {
+ .name = "max77620-top",
+ .irqs = max77620_top_irqs,
+ .num_irqs = ARRAY_SIZE(max77620_top_irqs),
+ .num_regs = 2,
+ .status_base = MAX77620_REG_IRQTOP,
+ .mask_base = MAX77620_REG_IRQTOPM,
+ .handle_pre_irq = max77620_irq_global_mask,
+ .handle_post_irq = max77620_irq_global_unmask,
+};
+
/* max77620_get_fps_period_reg_value: Get FPS bit field value from
* requested periods.
* MAX77620 supports the FPS period of 40, 80, 160, 320, 540, 1280, 2560
@@ -433,6 +469,7 @@ static int max77620_probe(struct i2c_client *client,
if (ret < 0)
return ret;
+ max77620_top_irq_chip.irq_drv_data = chip;
ret = devm_regmap_add_irq_chip(chip->dev, chip->rmap, client->irq,
IRQF_ONESHOT | IRQF_SHARED,
chip->irq_base, &max77620_top_irq_chip,
@@ -568,7 +605,6 @@ static const struct i2c_device_id max77620_id[] = {
{"max20024", MAX20024},
{},
};
-MODULE_DEVICE_TABLE(i2c, max77620_id);
static const struct dev_pm_ops max77620_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(max77620_i2c_suspend, max77620_i2c_resume)
@@ -582,11 +618,4 @@ static struct i2c_driver max77620_driver = {
.probe = max77620_probe,
.id_table = max77620_id,
};
-
-module_i2c_driver(max77620_driver);
-
-MODULE_DESCRIPTION("MAX77620/MAX20024 Multi Function Device Core Driver");
-MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
-MODULE_AUTHOR("Chaitanya Bandi <bandik@nvidia.com>");
-MODULE_AUTHOR("Mallikarjun Kasoju <mkasoju@nvidia.com>");
-MODULE_LICENSE("GPL v2");
+builtin_i2c_driver(max77620_driver);