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regulator: max77620: add support to configure MPOK 

Adding support to configure regulator POK mapping bit
to control nRST_IO and GPIO1 POK function.
In  tegra based platform which uses MAX20024 pmic, when
some of regulators are configured FPS_NONE(flexible power sequencer)
causes PMIC GPIO1 to go low which lead to various other rails turning off,
to avoid this MPOK bit of those regulators need to be set to 0
so that PMIC GPIO1 will not go low.

Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Venkat Reddy Talla 2016-11-17 23:24:35 +05:30 committed by Mark Brown
parent 9a40cb0cb8
commit 383d0fca70
2 changed files with 48 additions and 0 deletions
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46
drivers/regulator/max77620-regulator.c
View File

@ -80,6 +80,7 @@ struct max77620_regulator_pdata {
int suspend_fps_pd_slot;
int suspend_fps_pu_slot;
int current_mode;
int power_ok;
int ramp_rate_setting;
};
@ -350,11 +351,48 @@ static int max77620_set_slew_rate(struct max77620_regulator *pmic, int id,
return 0;
}
static int max77620_config_power_ok(struct max77620_regulator *pmic, int id)
{
struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
struct max77620_regulator_info *rinfo = pmic->rinfo[id];
struct max77620_chip *chip = dev_get_drvdata(pmic->dev->parent);
u8 val, mask;
int ret;
switch (chip->chip_id) {
case MAX20024:
if (rpdata->power_ok >= 0) {
if (rinfo->type == MAX77620_REGULATOR_TYPE_SD)
mask = MAX20024_SD_CFG1_MPOK_MASK;
else
mask = MAX20024_LDO_CFG2_MPOK_MASK;
val = rpdata->power_ok ? mask : 0;
ret = regmap_update_bits(pmic->rmap, rinfo->cfg_addr,
mask, val);
if (ret < 0) {
dev_err(pmic->dev, "Reg 0x%02x update failed %d\n",
rinfo->cfg_addr, ret);
return ret;
}
}
break;
default:
break;
}
return 0;
}
static int max77620_init_pmic(struct max77620_regulator *pmic, int id)
{
struct max77620_regulator_pdata *rpdata = &pmic->reg_pdata[id];
int ret;
max77620_config_power_ok(pmic, id);
/* Update power mode */
ret = max77620_regulator_get_power_mode(pmic, id);
if (ret < 0)
@ -594,6 +632,12 @@ static int max77620_of_parse_cb(struct device_node *np,
np, "maxim,suspend-fps-power-down-slot", &pval);
rpdata->suspend_fps_pd_slot = (!ret) ? pval : -1;
ret = of_property_read_u32(np, "maxim,power-ok-control", &pval);
if (!ret)
rpdata->power_ok = pval;
else
rpdata->power_ok = -1;
ret = of_property_read_u32(np, "maxim,ramp-rate-setting", &pval);
rpdata->ramp_rate_setting = (!ret) ? pval : 0;
@ -806,6 +850,8 @@ static int max77620_regulator_resume(struct device *dev)
for (id = 0; id < MAX77620_NUM_REGS; id++) {
reg_pdata = &pmic->reg_pdata[id];
max77620_config_power_ok(pmic, id);
max77620_regulator_set_fps_slots(pmic, id, false);
if (reg_pdata->active_fps_src < 0)
continue;

2
include/linux/mfd/max77620.h
View File

@ -180,6 +180,7 @@
#define MAX77620_SD_CFG1_FPWM_SD_MASK BIT(2)
#define MAX77620_SD_CFG1_FPWM_SD_SKIP 0
#define MAX77620_SD_CFG1_FPWM_SD_FPWM BIT(2)
#define MAX20024_SD_CFG1_MPOK_MASK BIT(1)
#define MAX77620_SD_CFG1_FSRADE_SD_MASK BIT(0)
#define MAX77620_SD_CFG1_FSRADE_SD_DISABLE 0
#define MAX77620_SD_CFG1_FSRADE_SD_ENABLE BIT(0)
@ -187,6 +188,7 @@
/* LDO_CNFG2 */
#define MAX77620_LDO_POWER_MODE_MASK 0xC0
#define MAX77620_LDO_POWER_MODE_SHIFT 6
#define MAX20024_LDO_CFG2_MPOK_MASK BIT(2)
#define MAX77620_LDO_CFG2_ADE_MASK BIT(1)
#define MAX77620_LDO_CFG2_ADE_DISABLE 0
#define MAX77620_LDO_CFG2_ADE_ENABLE BIT(1)