summaryrefslogtreecommitdiff
path: root/include/linux/mfd
diff options
context:
space:
mode:
authorSangbeom Kim <sbkim73@samsung.com>2012-06-18 04:49:20 +0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-06-19 15:06:32 +0400
commitc848bc8538cd29e92223d5e72e8fb60e6f2e176e (patch)
treea7a40e51dc2efafc2a25959cb05f7bf9cf71732e /include/linux/mfd
parent852abad238da723efac29f3e78dd768c18d6a062 (diff)
downloadlinux-c848bc8538cd29e92223d5e72e8fb60e6f2e176e.tar.xz
regulator: s5m8767a: Support AP watchdog reset operation
The S5M8767A can't know status of ap reset. So, After AP watchdog reset, AP can't boot normally. Problem can be happened like below condition. - AP Bootable lowest voltage(vdd_arm): 0.9v - AP DVFS voltage table: 0.8v, 0.9v, 1.0v - During AP works on lowest voltage(0.8V), watchdog reset is asserted - AP can't boot, because vdd arm is still 0.8v Solution - Basic concept: After ap watchdog reset, GPIO configuration is changed by default value - S5M8767A has function of voltage control with gpio (8 levels with 3 gpios) - Set bootable voltage on level 0 -> can work with default gpio configuration - In the probing, Change voltage control level from level 0 to level 1 - Execute normal dvfs operation on level 1 - After watchdog reset, ap gpio is set by default value - PMIC operation mode is changed by ap reset (level1 -> level0) - Regardless of previous vdd_arm voltage, AP always can be booted. Signed-off-by: Sangbeom Kim <sbkim73@samsung.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'include/linux/mfd')
-rw-r--r--include/linux/mfd/s5m87xx/s5m-core.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/mfd/s5m87xx/s5m-core.h b/include/linux/mfd/s5m87xx/s5m-core.h
index 21603b42f22f..0b2e0ed309f5 100644
--- a/include/linux/mfd/s5m87xx/s5m-core.h
+++ b/include/linux/mfd/s5m87xx/s5m-core.h
@@ -347,6 +347,7 @@ struct s5m_platform_data {
bool buck_voltage_lock;
int buck_gpios[3];
+ int buck_ds[3];
int buck2_voltage[8];
bool buck2_gpiodvs;
int buck3_voltage[8];
@@ -369,6 +370,10 @@ struct s5m_platform_data {
bool buck2_ramp_enable;
bool buck3_ramp_enable;
bool buck4_ramp_enable;
+
+ int buck2_init;
+ int buck3_init;
+ int buck4_init;
};
#endif /* __LINUX_MFD_S5M_CORE_H */