[PATCH 4/5] rtc: Add driver for Maxim 77802 PMIC Real-Time-Clock
The MAX7802 PMIC has a Real-Time-Clock (RTC) with two alarms.
This patch adds support for the RTC and is based on a driver
added by Simon Glass to the Chrome OS kernel 3.8 tree.
Signed-off-by: Javier Martinez Canillas
---
drivers/mfd/max77802.c | 3 +
drivers/rtc/Kconfig| 10 +
drivers/rtc/Makefile | 1 +
drivers/rtc/rtc-max77802.c | 632 +
4 files changed, 646 insertions(+)
create mode 100644 drivers/rtc/rtc-max77802.c
diff --git a/drivers/mfd/max77802.c b/drivers/mfd/max77802.c
index 33e8023..62127fb 100644
--- a/drivers/mfd/max77802.c
+++ b/drivers/mfd/max77802.c
@@ -35,6 +35,9 @@
static const struct mfd_cell max77802_devs[] = {
{ .name = "max77802-pmic", },
+#if defined(CONFIG_RTC_DRV_MAX77802)
+ { .name = "max77802-rtc", },
+#endif
#if defined(CONFIG_COMMON_CLK_MAX77802)
{ .name = "max77802-clk", },
#endif
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 0754f5c..e0b6495 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -288,6 +288,16 @@ config RTC_DRV_MAX77686
This driver can also be built as a module. If so, the module
will be called rtc-max77686.
+config RTC_DRV_MAX77802
+ tristate "Maxim MAX77802"
+ depends on MFD_MAX77802
+ help
+ If you say yes here you will get support for the
+ RTC of Maxim MAX77802 PMIC.
+
+ This driver can also be built as a module. If so, the module
+ will be called rtc-max77802.
+
config RTC_DRV_RS5C372
tristate "Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A"
help
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 70347d0..247de78 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -81,6 +81,7 @@ obj-$(CONFIG_RTC_DRV_MAX8998) += rtc-max8998.o
obj-$(CONFIG_RTC_DRV_MAX8997) += rtc-max8997.o
obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o
obj-$(CONFIG_RTC_DRV_MAX77686) += rtc-max77686.o
+obj-$(CONFIG_RTC_DRV_MAX77802) += rtc-max77802.o
obj-$(CONFIG_RTC_DRV_MC13XXX) += rtc-mc13xxx.o
obj-$(CONFIG_RTC_DRV_MCP795) += rtc-mcp795.o
obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o
diff --git a/drivers/rtc/rtc-max77802.c b/drivers/rtc/rtc-max77802.c
new file mode 100644
index 000..cb85b1d
--- /dev/null
+++ b/drivers/rtc/rtc-max77802.c
@@ -0,0 +1,632 @@
+/*
+ * RTC driver for Maxim MAX77802
+ *
+ * Copyright (C) 2013 Google, Inc
+ *
+ * Copyright (C) 2012 Samsung Electronics Co.Ltd
+ *
+ * based on rtc-max8997.c
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+/* RTC Control Register */
+#define BCD_EN_SHIFT 0
+#define BCD_EN_MASK(1 << BCD_EN_SHIFT)
+#define MODEL24_SHIFT 1
+#define MODEL24_MASK (1 << MODEL24_SHIFT)
+/* RTC Update Register1 */
+#define RTC_UDR_SHIFT 0
+#define RTC_UDR_MASK (1 << RTC_UDR_SHIFT)
+#define RTC_RBUDR_SHIFT4
+#define RTC_RBUDR_MASK (1 << RTC_RBUDR_SHIFT)
+/* WTSR and SMPL Register */
+#define WTSRT_SHIFT0
+#define SMPLT_SHIFT2
+#define WTSR_EN_SHIFT 6
+#define SMPL_EN_SHIFT 7
+#define WTSRT_MASK (3 << WTSRT_SHIFT)
+#define SMPLT_MASK (3 << SMPLT_SHIFT)
+#define WTSR_EN_MASK (1 << WTSR_EN_SHIFT)
+#define SMPL_EN_MASK (1 << SMPL_EN_SHIFT)
+/* RTC Hour register */
+#define HOUR_PM_SHIFT 6
+#define HOUR_PM_MASK (1 << HOUR_PM_SHIFT)
+/* RTC Alarm Enable */
+#define ALARM_ENABLE_SHIFT 7
+#define ALARM_ENABLE_MASK (1 << ALARM_ENABLE_SHIFT)
+
+/* For the RTCAE1 register, we write this value to enable the alarm */
+#define ALARM_ENABLE_VALUE 0x77
+
+#define MAX77802_RTC_UPDATE_DELAY_US 200
+#undef MAX77802_RTC_WTSR_SMPL
+
+enum {
+ RTC_SEC = 0,
+ RTC_MIN,
+ RTC_HOUR,
+ RTC_WEEKDAY,
+ RTC_MONTH,
+ RTC_YEAR,
+ RTC_DATE,
+ RTC_NR_TIME
+};
+
+struct max77802_rtc_info {
+ struct device *dev;
+ struct max77802_dev *max77802;
+ struct i2c_client *rtc;
+ struct rtc_device *rtc_dev;
+ struct mutexlock;
+
+ struct regmap *regmap;
+
+ int virq;
+ int rtc_24hr_mode;
+};
+
+enum MAX77802_RTC_OP {
+ MAX77802_RTC_WRITE,
+ MAX77802_RTC_READ,
+};
+
+static inline int max77802_rtc_calculate_wday(u8 shifted)
+{
+ int counter = -1;
+
+ while (shifted) {
+ shifted >>=
[PATCH 4/5] rtc: Add driver for Maxim 77802 PMIC Real-Time-Clock
The MAX7802 PMIC has a Real-Time-Clock (RTC) with two alarms.
This patch adds support for the RTC and is based on a driver
added by Simon Glass to the Chrome OS kernel 3.8 tree.
Signed-off-by: Javier Martinez Canillas javier.marti...@collabora.co.uk
---
drivers/mfd/max77802.c | 3 +
drivers/rtc/Kconfig| 10 +
drivers/rtc/Makefile | 1 +
drivers/rtc/rtc-max77802.c | 632 +
4 files changed, 646 insertions(+)
create mode 100644 drivers/rtc/rtc-max77802.c
diff --git a/drivers/mfd/max77802.c b/drivers/mfd/max77802.c
index 33e8023..62127fb 100644
--- a/drivers/mfd/max77802.c
+++ b/drivers/mfd/max77802.c
@@ -35,6 +35,9 @@
static const struct mfd_cell max77802_devs[] = {
{ .name = max77802-pmic, },
+#if defined(CONFIG_RTC_DRV_MAX77802)
+ { .name = max77802-rtc, },
+#endif
#if defined(CONFIG_COMMON_CLK_MAX77802)
{ .name = max77802-clk, },
#endif
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 0754f5c..e0b6495 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -288,6 +288,16 @@ config RTC_DRV_MAX77686
This driver can also be built as a module. If so, the module
will be called rtc-max77686.
+config RTC_DRV_MAX77802
+ tristate Maxim MAX77802
+ depends on MFD_MAX77802
+ help
+ If you say yes here you will get support for the
+ RTC of Maxim MAX77802 PMIC.
+
+ This driver can also be built as a module. If so, the module
+ will be called rtc-max77802.
+
config RTC_DRV_RS5C372
tristate Ricoh R2025S/D, RS5C372A/B, RV5C386, RV5C387A
help
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 70347d0..247de78 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -81,6 +81,7 @@ obj-$(CONFIG_RTC_DRV_MAX8998) += rtc-max8998.o
obj-$(CONFIG_RTC_DRV_MAX8997) += rtc-max8997.o
obj-$(CONFIG_RTC_DRV_MAX6902) += rtc-max6902.o
obj-$(CONFIG_RTC_DRV_MAX77686) += rtc-max77686.o
+obj-$(CONFIG_RTC_DRV_MAX77802) += rtc-max77802.o
obj-$(CONFIG_RTC_DRV_MC13XXX) += rtc-mc13xxx.o
obj-$(CONFIG_RTC_DRV_MCP795) += rtc-mcp795.o
obj-$(CONFIG_RTC_DRV_MSM6242) += rtc-msm6242.o
diff --git a/drivers/rtc/rtc-max77802.c b/drivers/rtc/rtc-max77802.c
new file mode 100644
index 000..cb85b1d
--- /dev/null
+++ b/drivers/rtc/rtc-max77802.c
@@ -0,0 +1,632 @@
+/*
+ * RTC driver for Maxim MAX77802
+ *
+ * Copyright (C) 2013 Google, Inc
+ *
+ * Copyright (C) 2012 Samsung Electronics Co.Ltd
+ *
+ * based on rtc-max8997.c
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include linux/slab.h
+#include linux/rtc.h
+#include linux/delay.h
+#include linux/mutex.h
+#include linux/module.h
+#include linux/platform_device.h
+#include linux/mfd/max77802-private.h
+#include linux/irqdomain.h
+#include linux/regmap.h
+
+/* RTC Control Register */
+#define BCD_EN_SHIFT 0
+#define BCD_EN_MASK(1 BCD_EN_SHIFT)
+#define MODEL24_SHIFT 1
+#define MODEL24_MASK (1 MODEL24_SHIFT)
+/* RTC Update Register1 */
+#define RTC_UDR_SHIFT 0
+#define RTC_UDR_MASK (1 RTC_UDR_SHIFT)
+#define RTC_RBUDR_SHIFT4
+#define RTC_RBUDR_MASK (1 RTC_RBUDR_SHIFT)
+/* WTSR and SMPL Register */
+#define WTSRT_SHIFT0
+#define SMPLT_SHIFT2
+#define WTSR_EN_SHIFT 6
+#define SMPL_EN_SHIFT 7
+#define WTSRT_MASK (3 WTSRT_SHIFT)
+#define SMPLT_MASK (3 SMPLT_SHIFT)
+#define WTSR_EN_MASK (1 WTSR_EN_SHIFT)
+#define SMPL_EN_MASK (1 SMPL_EN_SHIFT)
+/* RTC Hour register */
+#define HOUR_PM_SHIFT 6
+#define HOUR_PM_MASK (1 HOUR_PM_SHIFT)
+/* RTC Alarm Enable */
+#define ALARM_ENABLE_SHIFT 7
+#define ALARM_ENABLE_MASK (1 ALARM_ENABLE_SHIFT)
+
+/* For the RTCAE1 register, we write this value to enable the alarm */
+#define ALARM_ENABLE_VALUE 0x77
+
+#define MAX77802_RTC_UPDATE_DELAY_US 200
+#undef MAX77802_RTC_WTSR_SMPL
+
+enum {
+ RTC_SEC = 0,
+ RTC_MIN,
+ RTC_HOUR,
+ RTC_WEEKDAY,
+ RTC_MONTH,
+ RTC_YEAR,
+ RTC_DATE,
+ RTC_NR_TIME
+};
+
+struct max77802_rtc_info {
+ struct device *dev;
+ struct max77802_dev *max77802;
+ struct i2c_client *rtc;
+ struct rtc_device *rtc_dev;
+ struct mutexlock;
+
+ struct regmap *regmap;
+
+ int virq;
+ int rtc_24hr_mode;
+};
+
+enum MAX77802_RTC_OP {
+ MAX77802_RTC_WRITE,
+ MAX77802_RTC_READ,
+};
