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mfd: pm8038: Enable the battery alarm module

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The battery alarm module provides interrupts when the battery
falls below or rises above a programmed threshold. This feature
is useful to wakeup the device when the battery is in low voltage
situations.

(cherry picked from commit 6d538144cb02933cf27f425ad721541d80377b43)

Change-Id: I5d17bacf363cab165156b62730ccf9c23c633b3c
CRs-Fixed: 372690
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
(cherry picked from commit 16f56979ee6876ce64f6dba8928a782825ff1275)
This commit is contained in:
Abhijeet Dharmapurikar
2012-09-24 13:04:37 -07:00
committed by Stephen Boyd
parent 3288119c79
commit 092d7c8abb
2 changed files with 34 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/mfd/pm8038-core.c
View File

@@ -33,6 +33,11 @@
#define REG_RTC_BASE 0x11D #define REG_RTC_BASE 0x11D
#define REG_IRQ_BASE 0x1BB #define REG_IRQ_BASE 0x1BB
#define REG_BATT_ALARM_THRESH 0x023
#define REG_BATT_ALARM_CTRL1 0x024
#define REG_BATT_ALARM_CTRL2 0x021
#define REG_BATT_ALARM_PWM_CTRL 0x020
#define REG_SPK_BASE 0x253 #define REG_SPK_BASE 0x253
#define REG_SPK_REGISTERS 6 #define REG_SPK_REGISTERS 6
@@ -336,6 +341,27 @@ static struct mfd_cell thermal_alarm_cell __devinitdata = {
.pdata_size = sizeof(struct pm8xxx_tm_core_data), .pdata_size = sizeof(struct pm8xxx_tm_core_data),
}; };
static const struct resource batt_alarm_cell_resources[] __devinitconst = {
SINGLE_IRQ_RESOURCE("pm8921_batt_alarm_irq", PM8038_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 const struct resource ccadc_cell_resources[] __devinitconst = { static const struct resource ccadc_cell_resources[] __devinitconst = {
SINGLE_IRQ_RESOURCE("PM8921_BMS_CCADC_EOC", PM8921_BMS_CCADC_EOC), SINGLE_IRQ_RESOURCE("PM8921_BMS_CCADC_EOC", PM8921_BMS_CCADC_EOC),
}; };
@@ -661,6 +687,13 @@ pm8038_add_subdevices(const struct pm8038_platform_data *pdata,
goto bail; 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;
}
if (pdata->ccadc_pdata) { if (pdata->ccadc_pdata) {
ccadc_cell.platform_data = pdata->ccadc_pdata; ccadc_cell.platform_data = pdata->ccadc_pdata;
ccadc_cell.pdata_size = ccadc_cell.pdata_size =

1
include/linux/mfd/pm8xxx/pm8038.h
View File

@@ -54,6 +54,7 @@
/* PMIC Interrupts */ /* PMIC Interrupts */
#define PM8038_RTC_ALARM_IRQ PM8038_IRQ_BLOCK_BIT(4, 7) #define PM8038_RTC_ALARM_IRQ PM8038_IRQ_BLOCK_BIT(4, 7)
#define PM8038_BATT_ALARM_IRQ PM8921_IRQ_BLOCK_BIT(5, 6)
#define PM8038_PWRKEY_REL_IRQ PM8038_IRQ_BLOCK_BIT(6, 2) #define PM8038_PWRKEY_REL_IRQ PM8038_IRQ_BLOCK_BIT(6, 2)
#define PM8038_PWRKEY_PRESS_IRQ PM8038_IRQ_BLOCK_BIT(6, 3) #define PM8038_PWRKEY_PRESS_IRQ PM8038_IRQ_BLOCK_BIT(6, 3)
#define PM8038_KEYPAD_IRQ PM8038_IRQ_BLOCK_BIT(9, 2) #define PM8038_KEYPAD_IRQ PM8038_IRQ_BLOCK_BIT(9, 2)