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path: root/drivers/rtc/rtc-max77686.c
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Diffstat (limited to 'drivers/rtc/rtc-max77686.c')
-rw-r--r--drivers/rtc/rtc-max77686.c148
1 files changed, 127 insertions, 21 deletions
diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index 8fe1092c4795..5e924f3cde90 100644
--- a/drivers/rtc/rtc-max77686.c
+++ b/drivers/rtc/rtc-max77686.c
@@ -12,6 +12,7 @@
*
*/
+#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/rtc.h>
#include <linux/delay.h>
@@ -22,6 +23,9 @@
#include <linux/irqdomain.h>
#include <linux/regmap.h>
+#define MAX77686_I2C_ADDR_RTC (0x0C >> 1)
+#define MAX77686_INVALID_I2C_ADDR (-1)
+
/* RTC Control Register */
#define BCD_EN_SHIFT 0
#define BCD_EN_MASK BIT(BCD_EN_SHIFT)
@@ -68,8 +72,10 @@ struct max77686_rtc_driver_data {
const unsigned int *map;
/* Has a separate alarm enable register? */
bool alarm_enable_reg;
- /* Has a separate I2C regmap for the RTC? */
- bool separate_i2c_addr;
+ /* I2C address for RTC block */
+ int rtc_i2c_addr;
+ /* RTC IRQ CHIP for regmap */
+ const struct regmap_irq_chip *rtc_irq_chip;
};
struct max77686_rtc_info {
@@ -82,7 +88,9 @@ struct max77686_rtc_info {
struct regmap *rtc_regmap;
const struct max77686_rtc_driver_data *drv_data;
+ struct regmap_irq_chip_data *rtc_irq_data;
+ int rtc_irq;
int virq;
int rtc_24hr_mode;
};
@@ -153,12 +161,32 @@ static const unsigned int max77686_map[REG_RTC_END] = {
[REG_RTC_AE1] = REG_RTC_NONE,
};
+static const struct regmap_irq max77686_rtc_irqs[] = {
+ /* RTC interrupts */
+ { .reg_offset = 0, .mask = MAX77686_RTCINT_RTC60S_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_RTCINT_RTCA1_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_RTCINT_RTCA2_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_RTCINT_SMPL_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_RTCINT_RTC1S_MSK, },
+ { .reg_offset = 0, .mask = MAX77686_RTCINT_WTSR_MSK, },
+};
+
+static const struct regmap_irq_chip max77686_rtc_irq_chip = {
+ .name = "max77686-rtc",
+ .status_base = MAX77686_RTC_INT,
+ .mask_base = MAX77686_RTC_INTM,
+ .num_regs = 1,
+ .irqs = max77686_rtc_irqs,
+ .num_irqs = ARRAY_SIZE(max77686_rtc_irqs),
+};
+
static const struct max77686_rtc_driver_data max77686_drv_data = {
.delay = 16000,
.mask = 0x7f,
.map = max77686_map,
.alarm_enable_reg = false,
- .separate_i2c_addr = true,
+ .rtc_i2c_addr = MAX77686_I2C_ADDR_RTC,
+ .rtc_irq_chip = &max77686_rtc_irq_chip,
};
static const unsigned int max77802_map[REG_RTC_END] = {
@@ -190,12 +218,22 @@ static const unsigned int max77802_map[REG_RTC_END] = {
[REG_RTC_AE1] = MAX77802_RTC_AE1,
};
+static const struct regmap_irq_chip max77802_rtc_irq_chip = {
+ .name = "max77802-rtc",
+ .status_base = MAX77802_RTC_INT,
+ .mask_base = MAX77802_RTC_INTM,
+ .num_regs = 1,
+ .irqs = max77686_rtc_irqs, /* same masks as 77686 */
+ .num_irqs = ARRAY_SIZE(max77686_rtc_irqs),
+};
+
static const struct max77686_rtc_driver_data max77802_drv_data = {
.delay = 200,
.mask = 0xff,
.map = max77802_map,
.alarm_enable_reg = true,
- .separate_i2c_addr = false,
+ .rtc_i2c_addr = MAX77686_INVALID_I2C_ADDR,
+ .rtc_irq_chip = &max77802_rtc_irq_chip,
};
static void max77686_rtc_data_to_tm(u8 *data, struct rtc_time *tm,
@@ -599,9 +637,65 @@ static int max77686_rtc_init_reg(struct max77686_rtc_info *info)
return ret;
}
+static const struct regmap_config max77686_rtc_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int max77686_init_rtc_regmap(struct max77686_rtc_info *info)
+{
+ struct device *parent = info->dev->parent;
+ struct i2c_client *parent_i2c = to_i2c_client(parent);
+ int ret;
+
+ info->rtc_irq = parent_i2c->irq;
+
+ info->regmap = dev_get_regmap(parent, NULL);
+ if (!info->regmap) {
+ dev_err(info->dev, "Failed to get rtc regmap\n");
+ return -ENODEV;
+ }
+
+ if (info->drv_data->rtc_i2c_addr == MAX77686_INVALID_I2C_ADDR) {
+ info->rtc_regmap = info->regmap;
+ goto add_rtc_irq;
+ }
+
+ info->rtc = i2c_new_dummy(parent_i2c->adapter,
+ info->drv_data->rtc_i2c_addr);
+ if (!info->rtc) {
+ dev_err(info->dev, "Failed to allocate I2C device for RTC\n");
+ return -ENODEV;
+ }
+
+ info->rtc_regmap = devm_regmap_init_i2c(info->rtc,
+ &max77686_rtc_regmap_config);
+ if (IS_ERR(info->rtc_regmap)) {
+ ret = PTR_ERR(info->rtc_regmap);
+ dev_err(info->dev, "Failed to allocate RTC regmap: %d\n", ret);
+ goto err_unregister_i2c;
+ }
+
+add_rtc_irq:
+ ret = regmap_add_irq_chip(info->rtc_regmap, info->rtc_irq,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
+ IRQF_SHARED, 0, info->drv_data->rtc_irq_chip,
+ &info->rtc_irq_data);
+ if (ret < 0) {
+ dev_err(info->dev, "Failed to add RTC irq chip: %d\n", ret);
+ goto err_unregister_i2c;
+ }
+
+ return 0;
+
+err_unregister_i2c:
+ if (info->rtc)
+ i2c_unregister_device(info->rtc);
+ return ret;
+}
+
static int max77686_rtc_probe(struct platform_device *pdev)
{
- struct max77686_dev *max77686 = dev_get_drvdata(pdev->dev.parent);
struct max77686_rtc_info *info;
const struct platform_device_id *id = platform_get_device_id(pdev);
int ret;
@@ -613,18 +707,16 @@ static int max77686_rtc_probe(struct platform_device *pdev)
mutex_init(&info->lock);
info->dev = &pdev->dev;
- info->rtc = max77686->rtc;
info->drv_data = (const struct max77686_rtc_driver_data *)
id->driver_data;
- info->regmap = max77686->regmap;
- info->rtc_regmap = (info->drv_data->separate_i2c_addr) ?
- max77686->rtc_regmap : info->regmap;
+ ret = max77686_init_rtc_regmap(info);
+ if (ret < 0)
+ return ret;
platform_set_drvdata(pdev, info);
ret = max77686_rtc_init_reg(info);
-
if (ret < 0) {
dev_err(&pdev->dev, "Failed to initialize RTC reg:%d\n", ret);
goto err_rtc;
@@ -643,30 +735,43 @@ static int max77686_rtc_probe(struct platform_device *pdev)
goto err_rtc;
}
- if (!max77686->rtc_irq_data) {
- ret = -EINVAL;
- dev_err(&pdev->dev, "No RTC regmap IRQ chip\n");
- goto err_rtc;
- }
-
- info->virq = regmap_irq_get_virq(max77686->rtc_irq_data,
+ info->virq = regmap_irq_get_virq(info->rtc_irq_data,
MAX77686_RTCIRQ_RTCA1);
if (info->virq <= 0) {
ret = -ENXIO;
goto err_rtc;
}
- ret = devm_request_threaded_irq(&pdev->dev, info->virq, NULL,
- max77686_rtc_alarm_irq, 0,
- "rtc-alarm1", info);
- if (ret < 0)
+ ret = request_threaded_irq(info->virq, NULL, max77686_rtc_alarm_irq, 0,
+ "rtc-alarm1", info);
+ if (ret < 0) {
dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
info->virq, ret);
+ goto err_rtc;
+ }
+
+ return 0;
err_rtc:
+ regmap_del_irq_chip(info->rtc_irq, info->rtc_irq_data);
+ if (info->rtc)
+ i2c_unregister_device(info->rtc);
+
return ret;
}
+static int max77686_rtc_remove(struct platform_device *pdev)
+{
+ struct max77686_rtc_info *info = platform_get_drvdata(pdev);
+
+ free_irq(info->virq, info);
+ regmap_del_irq_chip(info->rtc_irq, info->rtc_irq_data);
+ if (info->rtc)
+ i2c_unregister_device(info->rtc);
+
+ return 0;
+}
+
#ifdef CONFIG_PM_SLEEP
static int max77686_rtc_suspend(struct device *dev)
{
@@ -707,6 +812,7 @@ static struct platform_driver max77686_rtc_driver = {
.pm = &max77686_rtc_pm_ops,
},
.probe = max77686_rtc_probe,
+ .remove = max77686_rtc_remove,
.id_table = rtc_id,
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-04 03:59:07 +0000