From 319e59cdc04acdaaedb29d3f569a5883abb459d2 Mon Sep 17 00:00:00 2001
From: David Collins <collinsd@codeaurora.org>
Date: Fri, 24 Jun 2011 09:08:56 -0700
Subject: [PATCH] mfd: pm8921-core: add mfd cell for pm8921 battery alarm
 device

Add an mfd cell for the PMIC 8921 battery alarm into the
pm8921-core.

Change-Id: Ia856c88050aa99822e6541311f40417ec63964d4
Signed-off-by: David Collins <collinsd@codeaurora.org>
---
 drivers/mfd/pm8921-core.c         | 34 +++++++++++++++++++++++++++++++
 include/linux/mfd/pm8xxx/pm8921.h |  2 ++
 2 files changed, 36 insertions(+)

diff --git a/drivers/mfd/pm8921-core.c b/drivers/mfd/pm8921-core.c
index 0bf9ce05bcf..38c85216b7c 100644
--- a/drivers/mfd/pm8921-core.c
+++ b/drivers/mfd/pm8921-core.c
@@ -31,6 +31,11 @@
 #define REG_TEMP_ALARM_CTRL	0x1B
 #define REG_TEMP_ALARM_PWM	0x9B
 
+#define REG_BATT_ALARM_THRESH	0x023
+#define REG_BATT_ALARM_CTRL1	0x024
+#define REG_BATT_ALARM_CTRL2	0x0AA
+#define REG_BATT_ALARM_PWM_CTRL	0x0A3
+
 #define PM8921_VERSION_MASK	0xFFF0
 #define PM8921_VERSION_VALUE	0x06F0
 #define PM8921_REVISION_MASK	0x000F
@@ -312,6 +317,27 @@ static struct mfd_cell thermal_alarm_cell __devinitdata = {
 	.pdata_size	= sizeof(struct pm8xxx_tm_core_data),
 };
 
+static const struct resource batt_alarm_cell_resources[] __devinitconst = {
+	SINGLE_IRQ_RESOURCE("pm8921_batt_alarm_irq", PM8921_BATT_ALARM_IRQ),
+};
+
+static struct pm8xxx_batt_alarm_core_data batt_alarm_cdata = {
+	.irq_name		= "pm8921_batt_alarm_irq",
+	.reg_addr_threshold	= REG_BATT_ALARM_THRESH,
+	.reg_addr_ctrl1		= REG_BATT_ALARM_CTRL1,
+	.reg_addr_ctrl2		= REG_BATT_ALARM_CTRL2,
+	.reg_addr_pwm_ctrl	= REG_BATT_ALARM_PWM_CTRL,
+};
+
+static struct mfd_cell batt_alarm_cell __devinitdata = {
+	.name		= PM8XXX_BATT_ALARM_DEV_NAME,
+	.id		= -1,
+	.resources	= batt_alarm_cell_resources,
+	.num_resources	= ARRAY_SIZE(batt_alarm_cell_resources),
+	.platform_data	= &batt_alarm_cdata,
+	.pdata_size	= sizeof(struct pm8xxx_batt_alarm_core_data),
+};
+
 static int __devinit
 pm8921_add_subdevices(const struct pm8921_platform_data *pdata,
 		      struct pm8921 *pmic)
@@ -511,6 +537,14 @@ pm8921_add_subdevices(const struct pm8921_platform_data *pdata,
 		goto bail;
 	}
 
+	ret = mfd_add_devices(pmic->dev, 0, &batt_alarm_cell, 1, NULL,
+				irq_base);
+	if (ret) {
+		pr_err("Failed to add battery alarm subdevice ret=%d\n",
+			ret);
+		goto bail;
+	}
+
 	return 0;
 bail:
 	if (pmic->irq_chip) {
diff --git a/include/linux/mfd/pm8xxx/pm8921.h b/include/linux/mfd/pm8xxx/pm8921.h
index ab0ab7e3e7a..c5127501846 100644
--- a/include/linux/mfd/pm8xxx/pm8921.h
+++ b/include/linux/mfd/pm8xxx/pm8921.h
@@ -25,6 +25,7 @@
 #include <linux/mfd/pm8xxx/pwm.h>
 #include <linux/mfd/pm8xxx/misc.h>
 #include <linux/mfd/pm8xxx/tm.h>
+#include <linux/mfd/pm8xxx/batt-alarm.h>
 #include <linux/input/pmic8xxx-pwrkey.h>
 #include <linux/input/pmic8xxx-keypad.h>
 #include <linux/regulator/pm8921-regulator.h>
@@ -51,6 +52,7 @@
 
 /* PMIC Interrupts */
 #define PM8921_RTC_ALARM_IRQ		PM8921_IRQ_BLOCK_BIT(4, 7)
+#define PM8921_BATT_ALARM_IRQ		PM8921_IRQ_BLOCK_BIT(5, 6)
 #define PM8921_PWRKEY_REL_IRQ		PM8921_IRQ_BLOCK_BIT(6, 2)
 #define PM8921_PWRKEY_PRESS_IRQ		PM8921_IRQ_BLOCK_BIT(6, 3)
 #define PM8921_KEYPAD_IRQ		PM8921_IRQ_BLOCK_BIT(9, 2)