diff options
Diffstat (limited to 'arch/arm/mach-mx5/pm_da9053.c')
| -rw-r--r-- | arch/arm/mach-mx5/pm_da9053.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/arm/mach-mx5/pm_da9053.c b/arch/arm/mach-mx5/pm_da9053.c index 319013597f22..6e24fb2823d4 100644 --- a/arch/arm/mach-mx5/pm_da9053.c +++ b/arch/arm/mach-mx5/pm_da9053.c @@ -290,6 +290,35 @@ void pm_da9053_write_reg(u8 reg, u8 value) pm_i2c_imx_xfer(i2cmsg, 1); } +/* have to hard-code the preset voltage here for they share the register +as the normal setting on Da9053 */ +/* preset buck core to 850 mv */ +#define BUCKCORE_SUSPEND_PRESET 0xCE +/* preset buck core to 950 mv */ +#define BUCKPRO_SUSPEND_PRESET 0xD2 +/* preset ldo6 to 1200 mv */ +#define LDO6_SUSPEND_PRESET 0xC0 +/* preset ldo10 to 1200 mv */ +#define iLDO10_SUSPEND_PRESET 0xC0 +#define CONF_BIT 0x80 + +static u8 volt_settings[DA9052_LDO10_REG - DA9052_BUCKCORE_REG + 1]; +static void pm_da9053_preset_voltage(void) +{ + u8 reg, data; + for (reg = DA9052_BUCKCORE_REG; + reg <= DA9052_LDO10_REG; reg++) { + pm_da9053_read_reg(reg, &data); + volt_settings[reg - DA9052_BUCKCORE_REG] = data; + data |= CONF_BIT; + pm_da9053_write_reg(reg, data); + } + pm_da9053_write_reg(DA9052_BUCKCORE_REG, BUCKCORE_SUSPEND_PRESET); + pm_da9053_write_reg(DA9052_BUCKPRO_REG, BUCKPRO_SUSPEND_PRESET); + pm_da9053_write_reg(DA9052_LDO6_REG, LDO6_SUSPEND_PRESET); + pm_da9053_write_reg(DA9052_LDO10_REG, iLDO10_SUSPEND_PRESET); +} + #define DA9053_SLEEP_DELAY 0x1f int da9053_suspend_cmd(void) { @@ -305,6 +334,8 @@ int da9053_suspend_cmd(void) } clk_enable(i2c_clk); + pm_da9053_preset_voltage(); + pm_da9053_read_reg(DA9052_ID01_REG, &data); data &= ~(DA9052_ID01_DEFSUPPLY | DA9052_ID01_nRESMODE); pm_da9053_write_reg(DA9052_ID01_REG, data); @@ -320,6 +351,15 @@ int da9053_suspend_cmd(void) return 0; } +void da9053_restore_volt_settings(void) +{ + u8 reg; + for (reg = DA9052_BUCKCORE_REG; + reg <= DA9052_LDO10_REG; reg++) + pm_da9053_write_reg(reg, + volt_settings[reg - DA9052_BUCKCORE_REG]); +} + int da9053_poweroff_cmd(void) { unsigned char buf[2] = {0, 0}; |