[PATCH V7 0/5] rtc: max77686: make max77686 rtc driver as IP driver

[PATCH V7 0/5] rtc: max77686: make max77686 rtc driver as IP driver

[Laxman Dewangan]

Based on discussion on patch series of MAX77620 when adding separate
driver for max77620 RTC, it is discussed to reuse the max77686 driver
for all CHips MAX77802, MAX77686 and MAX77620. For this, the rtc-max77686
need to make as IP driver independent of their MFD parent driver.

This series makes the rtc-max77686 as independent driver from its 
parent. Required information is passed through the device parent
which is generic and does not depends on any max77686 specific
header ifnromation.

CC: Krzysztof Kozlowski <k.kozlowski@samsung.com>
CC: Javier Martinez Canillas <javier@osg.samsung.com>

Changes from V1: 
- Added reviewed/tested by tag which we got from V1.
- Remove changes from Kconfig.
- Maintain all register definition in max77686 private header and remove
  the movement to rtc driver.
- Taken care of all comments on V1 from Krzysztof and Javier.

Changes from V2: 
- Fix the issue of crash in unbind.

Changes from V3: 
- Fix suspend-resume after unbind/bind by unmapping virq in remove callback.

Changes from V5: 
- Abandon the addition of new API in regmap-irq and add dispose of virq
  in regmap_del_irq_chip().

Changes from V6: 
- make regmap change as independent of this series and rebase it on linux-next
  20160209

Laxman Dewangan (5):
  rtc: max77686: fix checkpatch error
  rtc: max77686: use rtc regmap to access RTC registers
  rtc: max77686: avoid reference of parent device info multiple places
  mfd: max77686: do not set i2c client data for rtc i2c client
  rtc: max77686: move initialisation of rtc regmap, irq chip locally

 drivers/mfd/max77686.c               |  86 +-------------
 drivers/rtc/rtc-max77686.c           | 214 ++++++++++++++++++++++++++---------
 include/linux/mfd/max77686-private.h |   3 -
 3 files changed, 161 insertions(+), 142 deletions(-)

-- 
2.1.4

[PATCH V7 1/5] rtc: max77686: fix checkpatch error

[Laxman Dewangan]

Fix following check patch error in rtc-max77686 driver:
- Alignment should match open parenthesis.
- braces {} should be used on all arms of this statement.
- Prefer using the BIT macro

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
CC: Krzysztof Kozlowski <k.kozlowski@samsung.com>
CC: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>

---
Changes from V1:
None, added reviewed/tested by.

Changes from V1:
None

Changes from V1:
None, become 2nd on series.

Changes from V5:
None

Changes from V6:
Make this as 1st of series as regmap change applied independently.

 drivers/rtc/rtc-max77686.c | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index 0f2965d..7f1ca10 100644
--- a/drivers/rtc/rtc-max77686.c
+++ b/drivers/rtc/rtc-max77686.c
@@ -24,20 +24,20 @@
 
 /* RTC Control Register */
 #define BCD_EN_SHIFT			0
-#define BCD_EN_MASK			(1 << BCD_EN_SHIFT)
+#define BCD_EN_MASK			BIT(BCD_EN_SHIFT)
 #define MODEL24_SHIFT			1
-#define MODEL24_MASK			(1 << MODEL24_SHIFT)
+#define MODEL24_MASK			BIT(MODEL24_SHIFT)
 /* RTC Update Register1 */
 #define RTC_UDR_SHIFT			0
-#define RTC_UDR_MASK			(1 << RTC_UDR_SHIFT)
+#define RTC_UDR_MASK			BIT(RTC_UDR_SHIFT)
 #define RTC_RBUDR_SHIFT			4
-#define RTC_RBUDR_MASK			(1 << RTC_RBUDR_SHIFT)
+#define RTC_RBUDR_MASK			BIT(RTC_RBUDR_SHIFT)
 /* RTC Hour register */
 #define HOUR_PM_SHIFT			6
-#define HOUR_PM_MASK			(1 << HOUR_PM_SHIFT)
+#define HOUR_PM_MASK			BIT(HOUR_PM_SHIFT)
 /* RTC Alarm Enable */
 #define ALARM_ENABLE_SHIFT		7
-#define ALARM_ENABLE_MASK		(1 << ALARM_ENABLE_SHIFT)
+#define ALARM_ENABLE_MASK		BIT(ALARM_ENABLE_SHIFT)
 
 #define REG_RTC_NONE			0xdeadbeef
 
@@ -205,9 +205,9 @@ static void max77686_rtc_data_to_tm(u8 *data, struct rtc_time *tm,
 
 	tm->tm_sec = data[RTC_SEC] & mask;
 	tm->tm_min = data[RTC_MIN] & mask;
-	if (info->rtc_24hr_mode)
+	if (info->rtc_24hr_mode) {
 		tm->tm_hour = data[RTC_HOUR] & 0x1f;
-	else {
+	} else {
 		tm->tm_hour = data[RTC_HOUR] & 0x0f;
 		if (data[RTC_HOUR] & HOUR_PM_MASK)
 			tm->tm_hour += 12;
@@ -256,7 +256,7 @@ static int max77686_rtc_tm_to_data(struct rtc_time *tm, u8 *data,
 }
 
 static int max77686_rtc_update(struct max77686_rtc_info *info,
-	enum MAX77686_RTC_OP op)
+			       enum MAX77686_RTC_OP op)
 {
 	int ret;
 	unsigned int data;
@@ -547,7 +547,7 @@ out:
 }
 
 static int max77686_rtc_alarm_irq_enable(struct device *dev,
-					unsigned int enabled)
+					 unsigned int enabled)
 {
 	struct max77686_rtc_info *info = dev_get_drvdata(dev);
 	int ret;
@@ -612,7 +612,7 @@ static int max77686_rtc_probe(struct platform_device *pdev)
 	int ret;
 
 	info = devm_kzalloc(&pdev->dev, sizeof(struct max77686_rtc_info),
-				GFP_KERNEL);
+			    GFP_KERNEL);
 	if (!info)
 		return -ENOMEM;
 
@@ -662,7 +662,8 @@ static int max77686_rtc_probe(struct platform_device *pdev)
 	}
 
 	ret = devm_request_threaded_irq(&pdev->dev, info->virq, NULL,
-				max77686_rtc_alarm_irq, 0, "rtc-alarm1", info);
+					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);
-- 
2.1.4

[PATCH V7 2/5] rtc: max77686: use rtc regmap to access RTC registers

[Laxman Dewangan]

rtc_regmap should be used to access all RTC registers instead
of parent regmap regardless of what chip or property have it.

This makes the register access uniform and extendible for other
chips.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
CC: Krzysztof Kozlowski <k.kozlowski@samsung.com>
CC: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>

---
Changes from V1:
None, added reviewed/tested by.

Changes from V2:
None

Changes from V3:
None, become 3rd on series.

Changes from V5:
None

Changes from V6:
Make this as 2nd of series as regmap change applied independently.

 drivers/rtc/rtc-max77686.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index 7f1ca10..28330e8 100644
--- a/drivers/rtc/rtc-max77686.c
+++ b/drivers/rtc/rtc-max77686.c
@@ -370,7 +370,7 @@ static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 			goto out;
 		}
 
-		ret = regmap_read(info->max77686->regmap,
+		ret = regmap_read(info->max77686->rtc_regmap,
 				  map[REG_RTC_AE1], &val);
 		if (ret < 0) {
 			dev_err(info->dev,
@@ -426,7 +426,8 @@ static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info)
 			goto out;
 		}
 
-		ret = regmap_write(info->max77686->regmap, map[REG_RTC_AE1], 0);
+		ret = regmap_write(info->max77686->rtc_regmap,
+				   map[REG_RTC_AE1], 0);
 	} else {
 		ret = regmap_bulk_read(info->max77686->rtc_regmap,
 				       map[REG_ALARM1_SEC], data,
@@ -471,7 +472,7 @@ static int max77686_rtc_start_alarm(struct max77686_rtc_info *info)
 		goto out;
 
 	if (info->drv_data->alarm_enable_reg) {
-		ret = regmap_write(info->max77686->regmap, map[REG_RTC_AE1],
+		ret = regmap_write(info->max77686->rtc_regmap, map[REG_RTC_AE1],
 				   MAX77802_ALARM_ENABLE_VALUE);
 	} else {
 		ret = regmap_bulk_read(info->max77686->rtc_regmap,
-- 
2.1.4

[PATCH V7 3/5] rtc: max77686: avoid reference of parent device info multiple places

[Laxman Dewangan]

Get rid of referring parent device info for register access
all the places by making regmap as part of max77686 rtc
device info. This will also remove the need of storing parent
device info in max77686 rtc device info as this is no more required.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
CC: Krzysztof Kozlowski <k.kozlowski@samsung.com>
CC: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>

---
Changes from V1:
None, added reviewed/tested by.

Changes form V2:
- Fix typo in description.

Changes form V3:
- None, become 4ths in series.

Changes from V4:
None

Changes from V5:
None

Changes from V6:
Make this as 3rd of series as regmap change applied independently.

 drivers/rtc/rtc-max77686.c | 52 ++++++++++++++++++++--------------------------
 1 file changed, 23 insertions(+), 29 deletions(-)

diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index 28330e8..8fe1092 100644
--- a/drivers/rtc/rtc-max77686.c
+++ b/drivers/rtc/rtc-max77686.c
@@ -74,12 +74,12 @@ struct max77686_rtc_driver_data {
 
 struct max77686_rtc_info {
 	struct device		*dev;
-	struct max77686_dev	*max77686;
 	struct i2c_client	*rtc;
 	struct rtc_device	*rtc_dev;
 	struct mutex		lock;
 
 	struct regmap		*regmap;
+	struct regmap		*rtc_regmap;
 
 	const struct max77686_rtc_driver_data *drv_data;
 
@@ -267,7 +267,7 @@ static int max77686_rtc_update(struct max77686_rtc_info *info,
 	else
 		data = 1 << RTC_RBUDR_SHIFT;
 
-	ret = regmap_update_bits(info->max77686->rtc_regmap,
+	ret = regmap_update_bits(info->rtc_regmap,
 				 info->drv_data->map[REG_RTC_UPDATE0],
 				 data, data);
 	if (ret < 0)
@@ -293,7 +293,7 @@ static int max77686_rtc_read_time(struct device *dev, struct rtc_time *tm)
 	if (ret < 0)
 		goto out;
 
-	ret = regmap_bulk_read(info->max77686->rtc_regmap,
+	ret = regmap_bulk_read(info->rtc_regmap,
 			       info->drv_data->map[REG_RTC_SEC],
 			       data, ARRAY_SIZE(data));
 	if (ret < 0) {
@@ -322,7 +322,7 @@ static int max77686_rtc_set_time(struct device *dev, struct rtc_time *tm)
 
 	mutex_lock(&info->lock);
 
-	ret = regmap_bulk_write(info->max77686->rtc_regmap,
+	ret = regmap_bulk_write(info->rtc_regmap,
 				info->drv_data->map[REG_RTC_SEC],
 				data, ARRAY_SIZE(data));
 	if (ret < 0) {
@@ -351,8 +351,8 @@ static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 	if (ret < 0)
 		goto out;
 
-	ret = regmap_bulk_read(info->max77686->rtc_regmap,
-			       map[REG_ALARM1_SEC], data, ARRAY_SIZE(data));
+	ret = regmap_bulk_read(info->rtc_regmap, map[REG_ALARM1_SEC],
+			       data, ARRAY_SIZE(data));
 	if (ret < 0) {
 		dev_err(info->dev, "Fail to read alarm reg(%d)\n", ret);
 		goto out;
@@ -370,8 +370,7 @@ static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 			goto out;
 		}
 
-		ret = regmap_read(info->max77686->rtc_regmap,
-				  map[REG_RTC_AE1], &val);
+		ret = regmap_read(info->rtc_regmap, map[REG_RTC_AE1], &val);
 		if (ret < 0) {
 			dev_err(info->dev,
 				"fail to read alarm enable(%d)\n", ret);
@@ -390,7 +389,7 @@ static int max77686_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 	}
 
 	alrm->pending = 0;
-	ret = regmap_read(info->max77686->regmap, MAX77686_REG_STATUS2, &val);
+	ret = regmap_read(info->regmap, MAX77686_REG_STATUS2, &val);
 	if (ret < 0) {
 		dev_err(info->dev, "Fail to read status2 reg(%d)\n", ret);
 		goto out;
@@ -426,12 +425,10 @@ static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info)
 			goto out;
 		}
 
-		ret = regmap_write(info->max77686->rtc_regmap,
-				   map[REG_RTC_AE1], 0);
+		ret = regmap_write(info->rtc_regmap, map[REG_RTC_AE1], 0);
 	} else {
-		ret = regmap_bulk_read(info->max77686->rtc_regmap,
-				       map[REG_ALARM1_SEC], data,
-				       ARRAY_SIZE(data));
+		ret = regmap_bulk_read(info->rtc_regmap, map[REG_ALARM1_SEC],
+				       data, ARRAY_SIZE(data));
 		if (ret < 0) {
 			dev_err(info->dev, "Fail to read alarm reg(%d)\n", ret);
 			goto out;
@@ -442,9 +439,8 @@ static int max77686_rtc_stop_alarm(struct max77686_rtc_info *info)
 		for (i = 0; i < ARRAY_SIZE(data); i++)
 			data[i] &= ~ALARM_ENABLE_MASK;
 
-		ret = regmap_bulk_write(info->max77686->rtc_regmap,
-					map[REG_ALARM1_SEC], data,
-					ARRAY_SIZE(data));
+		ret = regmap_bulk_write(info->rtc_regmap, map[REG_ALARM1_SEC],
+					data, ARRAY_SIZE(data));
 	}
 
 	if (ret < 0) {
@@ -472,12 +468,11 @@ static int max77686_rtc_start_alarm(struct max77686_rtc_info *info)
 		goto out;
 
 	if (info->drv_data->alarm_enable_reg) {
-		ret = regmap_write(info->max77686->rtc_regmap, map[REG_RTC_AE1],
+		ret = regmap_write(info->rtc_regmap, map[REG_RTC_AE1],
 				   MAX77802_ALARM_ENABLE_VALUE);
 	} else {
-		ret = regmap_bulk_read(info->max77686->rtc_regmap,
-				       map[REG_ALARM1_SEC], data,
-				       ARRAY_SIZE(data));
+		ret = regmap_bulk_read(info->rtc_regmap, map[REG_ALARM1_SEC],
+				       data, ARRAY_SIZE(data));
 		if (ret < 0) {
 			dev_err(info->dev, "Fail to read alarm reg(%d)\n", ret);
 			goto out;
@@ -496,9 +491,8 @@ static int max77686_rtc_start_alarm(struct max77686_rtc_info *info)
 		if (data[RTC_DATE] & 0x1f)
 			data[RTC_DATE] |= (1 << ALARM_ENABLE_SHIFT);
 
-		ret = regmap_bulk_write(info->max77686->rtc_regmap,
-					map[REG_ALARM1_SEC], data,
-					ARRAY_SIZE(data));
+		ret = regmap_bulk_write(info->rtc_regmap, map[REG_ALARM1_SEC],
+					data, ARRAY_SIZE(data));
 	}
 
 	if (ret < 0) {
@@ -527,7 +521,7 @@ static int max77686_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 	if (ret < 0)
 		goto out;
 
-	ret = regmap_bulk_write(info->max77686->rtc_regmap,
+	ret = regmap_bulk_write(info->rtc_regmap,
 				info->drv_data->map[REG_ALARM1_SEC],
 				data, ARRAY_SIZE(data));
 
@@ -593,7 +587,7 @@ static int max77686_rtc_init_reg(struct max77686_rtc_info *info)
 
 	info->rtc_24hr_mode = 1;
 
-	ret = regmap_bulk_write(info->max77686->rtc_regmap,
+	ret = regmap_bulk_write(info->rtc_regmap,
 				info->drv_data->map[REG_RTC_CONTROLM],
 				data, ARRAY_SIZE(data));
 	if (ret < 0) {
@@ -619,13 +613,13 @@ static int max77686_rtc_probe(struct platform_device *pdev)
 
 	mutex_init(&info->lock);
 	info->dev = &pdev->dev;
-	info->max77686 = max77686;
 	info->rtc = max77686->rtc;
 	info->drv_data = (const struct max77686_rtc_driver_data *)
 		id->driver_data;
 
-	if (!info->drv_data->separate_i2c_addr)
-		info->max77686->rtc_regmap = info->max77686->regmap;
+	info->regmap = max77686->regmap;
+	info->rtc_regmap = (info->drv_data->separate_i2c_addr) ?
+			    max77686->rtc_regmap : info->regmap;
 
 	platform_set_drvdata(pdev, info);
 
-- 
2.1.4

[PATCH V7 4/5] mfd: max77686: do not set i2c client data for rtc i2c client

[Laxman Dewangan]

There is different RTC I2C address for RTC block in MAX77686.
Driver is creating dummy i2c client for this address to access
the register of this IP block.

As there is no call to i2c_get_clientdata() for rtc_i2c client,
there is no need to store pointer and hence removing the call
to set client data for rtc i2c client.

Suggested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
CC: Krzysztof Kozlowski <k.kozlowski@samsung.com>
CC: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>

---
This is new in this series based on review comment from V1.

Changes from V2:
- Rephrase description.
- Added reviewed by.

Changes from V3:
- None, become 5th on series.

Changes from V4:
None

Changes from V5:
None

Changes from V6:
Make this as 4th of series as regmap change applied independently.

 drivers/mfd/max77686.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
index d959ebb..bda6fd7 100644
--- a/drivers/mfd/max77686.c
+++ b/drivers/mfd/max77686.c
@@ -277,7 +277,6 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
 				"Failed to allocate I2C device for RTC\n");
 			return -ENODEV;
 		}
-		i2c_set_clientdata(max77686->rtc, max77686);
 
 		max77686->rtc_regmap =
 			devm_regmap_init_i2c(max77686->rtc,
-- 
2.1.4

Re: [PATCH V7 4/5] mfd: max77686: do not set i2c client data for rtc i2c client

[Lee Jones]

On Tue, 09 Feb 2016, Laxman Dewangan wrote:

> There is different RTC I2C address for RTC block in MAX77686.
> Driver is creating dummy i2c client for this address to access
> the register of this IP block.
> 
> As there is no call to i2c_get_clientdata() for rtc_i2c client,
> there is no need to store pointer and hence removing the call
> to set client data for rtc i2c client.
> 
> Suggested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
> CC: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> CC: Javier Martinez Canillas <javier@osg.samsung.com>
> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
> 
> ---
> This is new in this series based on review comment from V1.
> 
> Changes from V2:
> - Rephrase description.
> - Added reviewed by.
> 
> Changes from V3:
> - None, become 5th on series.
> 
> Changes from V4:
> None
> 
> Changes from V5:
> None
> 
> Changes from V6:
> Make this as 4th of series as regmap change applied independently.
> 
>  drivers/mfd/max77686.c | 1 -
>  1 file changed, 1 deletion(-)

Appart from the subject line being wrong:

Acked-by: Lee Jones <lee.jones@linaro.org>

[...]

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [PATCH V7 4/5] mfd: max77686: do not set i2c client data for rtc i2c client

[Krzysztof Kozlowski]

On 10.02.2016 02:26, Laxman Dewangan wrote:
> There is different RTC I2C address for RTC block in MAX77686.
> Driver is creating dummy i2c client for this address to access
> the register of this IP block.
> 
> As there is no call to i2c_get_clientdata() for rtc_i2c client,
> there is no need to store pointer and hence removing the call
> to set client data for rtc i2c client.
> 
> Suggested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
> CC: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> CC: Javier Martinez Canillas <javier@osg.samsung.com>
> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
> 

FWIW, on max77686:
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>

Best regards,
Krzysztof

[PATCH V7 5/5] rtc: max77686: move initialisation of rtc regmap, irq chip locally

[Laxman Dewangan]

To make RTC block of MAX77686/MAX77802 as independent driver,
move the registration of i2c device, regmap for register access
and irq_chip for interrupt support inside the RTC driver.
Removed the same initialisation from MFD driver.

Having this change will allow to reuse this driver for different
PMIC/devices from Maxim Semiconductor if they kept same RTC IP on
different PMIC. Some of examples as PMIC MAX77620, MAX20024 where
same RTC IP used and hence driver for these chips will use this
driver only for RTC support.

Suggested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
CC: Krzysztof Kozlowski <k.kozlowski@samsung.com>
CC: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>

---
Changes from V1:
- Remove changes from Kconfig.
- Maintain all register definition in max77686 private header and remove
  the movement to rtc driver.
- Taken care of all comments on V1 from Krzysztof and Javier.

Changes from V2:
- Taken care of missed sequence for removing the resource.
- Fix the crash when doing unbind by using requested_threaded_irq()
  instead of demv_requested_threaded_irq().

Changes from V3:
- Fix the issue of suspend-resume with unbind/bind by unmapping the
  virq.

Changes from V4:
- Dispose mapped irq in error path in probe

Changes from V5:
- Remove the new APIs from regmap as functionality added to dispose the
  virq inside the regmap_del_irq_chip().

Changes from V6:
Make this as 5th of series as regmap change applied independently.
Also rebase on linux-next 20160209

 drivers/mfd/max77686.c               |  85 +-------------------
 drivers/rtc/rtc-max77686.c           | 148 ++++++++++++++++++++++++++++++-----
 include/linux/mfd/max77686-private.h |   3 -
 3 files changed, 130 insertions(+), 106 deletions(-)

diff --git a/drivers/mfd/max77686.c b/drivers/mfd/max77686.c
index bda6fd7..98ecd13 100644
--- a/drivers/mfd/max77686.c
+++ b/drivers/mfd/max77686.c
@@ -35,8 +35,6 @@
 #include <linux/err.h>
 #include <linux/of.h>
 
-#define I2C_ADDR_RTC	(0x0C >> 1)
-
 static const struct mfd_cell max77686_devs[] = {
 	{ .name = "max77686-pmic", },
 	{ .name = "max77686-rtc", },
@@ -116,11 +114,6 @@ static const struct regmap_config max77686_regmap_config = {
 	.val_bits = 8,
 };
 
-static const struct regmap_config max77686_rtc_regmap_config = {
-	.reg_bits = 8,
-	.val_bits = 8,
-};
-
 static const struct regmap_config max77802_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
@@ -156,25 +149,6 @@ static const struct regmap_irq_chip max77686_irq_chip = {
 	.num_irqs		= ARRAY_SIZE(max77686_irqs),
 };
 
-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 regmap_irq_chip max77802_irq_chip = {
 	.name			= "max77802-pmic",
 	.status_base		= MAX77802_REG_INT1,
@@ -184,15 +158,6 @@ static const struct regmap_irq_chip max77802_irq_chip = {
 	.num_irqs		= ARRAY_SIZE(max77686_irqs),
 };
 
-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 of_device_id max77686_pmic_dt_match[] = {
 	{
 		.compatible = "maxim,max77686",
@@ -214,8 +179,6 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
 	int ret = 0;
 	const struct regmap_config *config;
 	const struct regmap_irq_chip *irq_chip;
-	const struct regmap_irq_chip *rtc_irq_chip;
-	struct regmap **rtc_regmap;
 	const struct mfd_cell *cells;
 	int n_devs;
 
@@ -242,15 +205,11 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
 	if (max77686->type == TYPE_MAX77686) {
 		config = &max77686_regmap_config;
 		irq_chip = &max77686_irq_chip;
-		rtc_irq_chip = &max77686_rtc_irq_chip;
-		rtc_regmap = &max77686->rtc_regmap;
 		cells =  max77686_devs;
 		n_devs = ARRAY_SIZE(max77686_devs);
 	} else {
 		config = &max77802_regmap_config;
 		irq_chip = &max77802_irq_chip;
-		rtc_irq_chip = &max77802_rtc_irq_chip;
-		rtc_regmap = &max77686->regmap;
 		cells =  max77802_devs;
 		n_devs = ARRAY_SIZE(max77802_devs);
 	}
@@ -270,59 +229,25 @@ static int max77686_i2c_probe(struct i2c_client *i2c,
 		return -ENODEV;
 	}
 
-	if (max77686->type == TYPE_MAX77686) {
-		max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
-		if (!max77686->rtc) {
-			dev_err(max77686->dev,
-				"Failed to allocate I2C device for RTC\n");
-			return -ENODEV;
-		}
-
-		max77686->rtc_regmap =
-			devm_regmap_init_i2c(max77686->rtc,
-					     &max77686_rtc_regmap_config);
-		if (IS_ERR(max77686->rtc_regmap)) {
-			ret = PTR_ERR(max77686->rtc_regmap);
-			dev_err(max77686->dev,
-				"failed to allocate RTC regmap: %d\n",
-				ret);
-			goto err_unregister_i2c;
-		}
-	}
-
 	ret = regmap_add_irq_chip(max77686->regmap, max77686->irq,
 				  IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
 				  IRQF_SHARED, 0, irq_chip,
 				  &max77686->irq_data);
-	if (ret) {
+	if (ret < 0) {
 		dev_err(&i2c->dev, "failed to add PMIC irq chip: %d\n", ret);
-		goto err_unregister_i2c;
-	}
-
-	ret = regmap_add_irq_chip(*rtc_regmap, max77686->irq,
-				  IRQF_TRIGGER_FALLING | IRQF_ONESHOT |
-				  IRQF_SHARED, 0, rtc_irq_chip,
-				  &max77686->rtc_irq_data);
-	if (ret) {
-		dev_err(&i2c->dev, "failed to add RTC irq chip: %d\n", ret);
-		goto err_del_irqc;
+		return ret;
 	}
 
 	ret = mfd_add_devices(max77686->dev, -1, cells, n_devs, NULL, 0, NULL);
 	if (ret < 0) {
 		dev_err(&i2c->dev, "failed to add MFD devices: %d\n", ret);
-		goto err_del_rtc_irqc;
+		goto err_del_irqc;
 	}
 
 	return 0;
 
-err_del_rtc_irqc:
-	regmap_del_irq_chip(max77686->irq, max77686->rtc_irq_data);
 err_del_irqc:
 	regmap_del_irq_chip(max77686->irq, max77686->irq_data);
-err_unregister_i2c:
-	if (max77686->type == TYPE_MAX77686)
-		i2c_unregister_device(max77686->rtc);
 
 	return ret;
 }
@@ -333,12 +258,8 @@ static int max77686_i2c_remove(struct i2c_client *i2c)
 
 	mfd_remove_devices(max77686->dev);
 
-	regmap_del_irq_chip(max77686->irq, max77686->rtc_irq_data);
 	regmap_del_irq_chip(max77686->irq, max77686->irq_data);
 
-	if (max77686->type == TYPE_MAX77686)
-		i2c_unregister_device(max77686->rtc);
-
 	return 0;
 }
 
diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index 8fe1092..5e924f3 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,
 };
 
diff --git a/include/linux/mfd/max77686-private.h b/include/linux/mfd/max77686-private.h
index f504349..643dae7 100644
--- a/include/linux/mfd/max77686-private.h
+++ b/include/linux/mfd/max77686-private.h
@@ -437,14 +437,11 @@ enum max77686_irq {
 struct max77686_dev {
 	struct device *dev;
 	struct i2c_client *i2c; /* 0xcc / PMIC, Battery Control, and FLASH */
-	struct i2c_client *rtc; /* slave addr 0x0c */
 
 	unsigned long type;
 
 	struct regmap *regmap;		/* regmap for mfd */
-	struct regmap *rtc_regmap;	/* regmap for rtc */
 	struct regmap_irq_chip_data *irq_data;
-	struct regmap_irq_chip_data *rtc_irq_data;
 
 	int irq;
 	struct mutex irqlock;
-- 
2.1.4

Re: [PATCH V7 5/5] rtc: max77686: move initialisation of rtc regmap, irq chip locally

[Lee Jones]

On Tue, 09 Feb 2016, Laxman Dewangan wrote:

> To make RTC block of MAX77686/MAX77802 as independent driver,
> move the registration of i2c device, regmap for register access
> and irq_chip for interrupt support inside the RTC driver.
> Removed the same initialisation from MFD driver.
> 
> Having this change will allow to reuse this driver for different
> PMIC/devices from Maxim Semiconductor if they kept same RTC IP on
> different PMIC. Some of examples as PMIC MAX77620, MAX20024 where
> same RTC IP used and hence driver for these chips will use this
> driver only for RTC support.
> 
> Suggested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
> CC: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> CC: Javier Martinez Canillas <javier@osg.samsung.com>
> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
> 
> ---
> Changes from V1:
> - Remove changes from Kconfig.
> - Maintain all register definition in max77686 private header and remove
>   the movement to rtc driver.
> - Taken care of all comments on V1 from Krzysztof and Javier.
> 
> Changes from V2:
> - Taken care of missed sequence for removing the resource.
> - Fix the crash when doing unbind by using requested_threaded_irq()
>   instead of demv_requested_threaded_irq().
> 
> Changes from V3:
> - Fix the issue of suspend-resume with unbind/bind by unmapping the
>   virq.
> 
> Changes from V4:
> - Dispose mapped irq in error path in probe
> 
> Changes from V5:
> - Remove the new APIs from regmap as functionality added to dispose the
>   virq inside the regmap_del_irq_chip().
> 
> Changes from V6:
> Make this as 5th of series as regmap change applied independently.
> Also rebase on linux-next 20160209
> 
>  drivers/mfd/max77686.c               |  85 +-------------------
>  drivers/rtc/rtc-max77686.c           | 148 ++++++++++++++++++++++++++++++-----
>  include/linux/mfd/max77686-private.h |   3 -
>  3 files changed, 130 insertions(+), 106 deletions(-)

Yes, yes, yes!

This is how it should have been done in the first place IMHO.

Acked-by: Lee Jones <lee.jones@linaro.org>

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [PATCH V7 5/5] rtc: max77686: move initialisation of rtc regmap, irq chip locally

[Krzysztof Kozlowski]

On 10.02.2016 02:26, Laxman Dewangan wrote:
> To make RTC block of MAX77686/MAX77802 as independent driver,
> move the registration of i2c device, regmap for register access
> and irq_chip for interrupt support inside the RTC driver.
> Removed the same initialisation from MFD driver.
> 
> Having this change will allow to reuse this driver for different
> PMIC/devices from Maxim Semiconductor if they kept same RTC IP on
> different PMIC. Some of examples as PMIC MAX77620, MAX20024 where
> same RTC IP used and hence driver for these chips will use this
> driver only for RTC support.
> 
> Suggested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
> CC: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> CC: Javier Martinez Canillas <javier@osg.samsung.com>
> Tested-by: Javier Martinez Canillas <javier@osg.samsung.com>
> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
> 
> ---
> Changes from V1:
> - Remove changes from Kconfig.
> - Maintain all register definition in max77686 private header and remove
>   the movement to rtc driver.
> - Taken care of all comments on V1 from Krzysztof and Javier.
> 
> Changes from V2:
> - Taken care of missed sequence for removing the resource.
> - Fix the crash when doing unbind by using requested_threaded_irq()
>   instead of demv_requested_threaded_irq().
> 
> Changes from V3:
> - Fix the issue of suspend-resume with unbind/bind by unmapping the
>   virq.
> 
> Changes from V4:
> - Dispose mapped irq in error path in probe
> 
> Changes from V5:
> - Remove the new APIs from regmap as functionality added to dispose the
>   virq inside the regmap_del_irq_chip().
> 
> Changes from V6:
> Make this as 5th of series as regmap change applied independently.
> Also rebase on linux-next 20160209
> 
>  drivers/mfd/max77686.c               |  85 +-------------------
>  drivers/rtc/rtc-max77686.c           | 148 ++++++++++++++++++++++++++++++-----
>  include/linux/mfd/max77686-private.h |   3 -
>  3 files changed, 130 insertions(+), 106 deletions(-)
> 

Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
On max77686:
Tested-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>

Best regards,
Krzysztof

Re: [PATCH V7 0/5] rtc: max77686: make max77686 rtc driver as IP driver

[Alexandre Belloni]

On 09/02/2016 at 22:56:29 +0530, Laxman Dewangan wrote :
> Based on discussion on patch series of MAX77620 when adding separate
> driver for max77620 RTC, it is discussed to reuse the max77686 driver
> for all CHips MAX77802, MAX77686 and MAX77620. For this, the rtc-max77686
> need to make as IP driver independent of their MFD parent driver.
> 
> This series makes the rtc-max77686 as independent driver from its 
> parent. Required information is passed through the device parent
> which is generic and does not depends on any max77686 specific
> header ifnromation.
> 
> CC: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> CC: Javier Martinez Canillas <javier@osg.samsung.com>
> 
> Changes from V1: 
> - Added reviewed/tested by tag which we got from V1.
> - Remove changes from Kconfig.
> - Maintain all register definition in max77686 private header and remove
>   the movement to rtc driver.
> - Taken care of all comments on V1 from Krzysztof and Javier.
> 
> Changes from V2: 
> - Fix the issue of crash in unbind.
> 
> Changes from V3: 
> - Fix suspend-resume after unbind/bind by unmapping virq in remove callback.
> 
> Changes from V5: 
> - Abandon the addition of new API in regmap-irq and add dispose of virq
>   in regmap_del_irq_chip().
> 
> Changes from V6: 
> - make regmap change as independent of this series and rebase it on linux-next
>   20160209
> 
> Laxman Dewangan (5):
>   rtc: max77686: fix checkpatch error
>   rtc: max77686: use rtc regmap to access RTC registers
>   rtc: max77686: avoid reference of parent device info multiple places
>   mfd: max77686: do not set i2c client data for rtc i2c client
>   rtc: max77686: move initialisation of rtc regmap, irq chip locally
> 

All applied, thanks.

-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com