[PATCH v4 9/9] rtc: max77686: add MAX77714 support

From: Luca Ceresoli <luca@lucaceresoli.net>
To: linux-kernel@vger.kernel.org
Cc: Luca Ceresoli <luca@lucaceresoli.net>,
	Lee Jones <lee.jones@linaro.org>,
	Rob Herring <robh+dt@kernel.org>,
	Chanwoo Choi <cw00.choi@samsung.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>,
	Alessandro Zummo <a.zummo@towertech.it>,
	Alexandre Belloni <alexandre.belloni@bootlin.com>,
	Wim Van Sebroeck <wim@linux-watchdog.org>,
	Guenter Roeck <linux@roeck-us.net>,
	devicetree@vger.kernel.org, linux-rtc@vger.kernel.org,
	linux-watchdog@vger.kernel.org,
	Chiwoong Byun <woong.byun@samsung.com>,
	Laxman Dewangan <ldewangan@nvidia.com>,
	Randy Dunlap <rdunlap@infradead.org>
Subject: [PATCH v4 9/9] rtc: max77686: add MAX77714 support
Date: Sat, 20 Nov 2021 16:57:07 +0100	[thread overview]
Message-ID: <20211120155707.4019487-10-luca@lucaceresoli.net> (raw)
In-Reply-To: <20211120155707.4019487-1-luca@lucaceresoli.net>

The RTC included in the MAX77714 PMIC is very similar to the one in the
MAX77686. Reuse the rtc-max77686.c driver with the minimum required changes
for the MAX77714 RTC.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

---

Changes in v4: none

Changes in v3: none

Changes in v2: none
---
 drivers/rtc/Kconfig        |  2 +-
 drivers/rtc/rtc-max77686.c | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 058e56a10ab8..4242cca5e560 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -375,7 +375,7 @@ config RTC_DRV_MAX8997
 
 config RTC_DRV_MAX77686
 	tristate "Maxim MAX77686"
-	depends on MFD_MAX77686 || MFD_MAX77620 || COMPILE_TEST
+	depends on MFD_MAX77686 || MFD_MAX77620 || MFD_MAX77714 || COMPILE_TEST
 	help
 	  If you say yes here you will get support for the
 	  RTC of Maxim MAX77686/MAX77620/MAX77802 PMIC.
diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index 5c64d08c0732..b0250d91fb00 100644
--- a/drivers/rtc/rtc-max77686.c
+++ b/drivers/rtc/rtc-max77686.c
@@ -19,6 +19,7 @@
 
 #define MAX77686_I2C_ADDR_RTC		(0x0C >> 1)
 #define MAX77620_I2C_ADDR_RTC		0x68
+#define MAX77714_I2C_ADDR_RTC		0x48
 #define MAX77686_INVALID_I2C_ADDR	(-1)
 
 /* Define non existing register */
@@ -200,6 +201,28 @@ static const struct max77686_rtc_driver_data max77686_drv_data = {
 	.regmap_config = &max77686_rtc_regmap_config,
 };
 
+static const struct regmap_irq_chip max77714_rtc_irq_chip = {
+	.name		= "max77714-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) - 1, /* no WTSR on 77714 */
+};
+
+static const struct max77686_rtc_driver_data max77714_drv_data = {
+	.delay = 16000,
+	.mask  = 0x7f,
+	.map   = max77686_map,
+	.alarm_enable_reg = false,
+	.rtc_irq_from_platform = false,
+	/* On MAX77714 RTCA1 is BIT 1 of RTCINT (0x00). Not supported by this driver. */
+	.alarm_pending_status_reg = MAX77686_INVALID_REG,
+	.rtc_i2c_addr = MAX77714_I2C_ADDR_RTC,
+	.rtc_irq_chip = &max77714_rtc_irq_chip,
+	.regmap_config = &max77686_rtc_regmap_config,
+};
+
 static const struct regmap_config max77620_rtc_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
@@ -843,6 +866,7 @@ static const struct platform_device_id rtc_id[] = {
 	{ "max77686-rtc", .driver_data = (kernel_ulong_t)&max77686_drv_data, },
 	{ "max77802-rtc", .driver_data = (kernel_ulong_t)&max77802_drv_data, },
 	{ "max77620-rtc", .driver_data = (kernel_ulong_t)&max77620_drv_data, },
+	{ "max77714-rtc", .driver_data = (kernel_ulong_t)&max77714_drv_data, },
 	{},
 };
 MODULE_DEVICE_TABLE(platform, rtc_id);
-- 
2.25.1

