diff options
| author | Yilun Lin <yllin@google.com> | 2018-07-23 14:02:56 +0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-07-24 06:36:05 -0700 |
| commit | 8ff9198bb10722481139a2e540d76789f8404d36 (patch) | |
| tree | 0a16171ae3c4c9bdeb54af1aa4837b9ce2702e1d | |
| parent | 95a30548abfebfaac38e621ac124dc2197ded6fc (diff) | |
| download | chrome-ec-8ff9198bb10722481139a2e540d76789f8404d36.tar.gz | |
charger/mt6370: Support set LDO voltage function.
TEST=flash kukui and manually test on kukui p0.
BUG=b:80160408
BRANCH=None
Change-Id: I2be4bda585babd0afe6e64837904898d46115e54
Signed-off-by: Yilun Lin <yllin@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1146418
Commit-Ready: Yilun Lin <yllin@chromium.org>
Tested-by: Yilun Lin <yllin@chromium.org>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
| -rw-r--r-- | driver/charger/rt946x.c | 24 | ||||
| -rw-r--r-- | driver/charger/rt946x.h | 26 |
2 files changed, 50 insertions, 0 deletions
diff --git a/driver/charger/rt946x.c b/driver/charger/rt946x.c index a6cf203a34..137026d660 100644 --- a/driver/charger/rt946x.c +++ b/driver/charger/rt946x.c @@ -983,6 +983,30 @@ int rt946x_enable_charge_termination(int en) } #ifdef CONFIG_CHARGER_MT6370 +/* MT6370 LDO */ + +int mt6370_set_ldo_voltage(int mv) +{ + int rv; + int vout_val; + const int vout_mask = MT6370_MASK_LDOVOUT_EN | MT6370_MASK_LDOVOUT_VOUT; + + /* LDO output-off mode to floating. */ + rv = rt946x_update_bits(MT6370_REG_LDOCFG, MT6370_MASK_LDOCFG_OMS, 0); + if (rv) + return rv; + + /* Disable LDO if voltage is zero. */ + if (mv == 0) + return rt946x_clr_bit(MT6370_REG_LDOVOUT, + MT6370_MASK_LDOVOUT_EN); + + vout_val = 1 << MT6370_SHIFT_LDOVOUT_EN; + vout_val |= rt946x_closest_reg(MT6370_LDO_MIN, MT6370_LDO_MAX, + MT6370_LDO_STEP, mv); + return rt946x_update_bits(MT6370_REG_LDOVOUT, vout_mask, vout_val); +} + /* MT6370 RGB LED */ int mt6370_led_set_dim_mode(enum mt6370_led_index index, diff --git a/driver/charger/rt946x.h b/driver/charger/rt946x.h index d82d6e8e6d..16ba9ff823 100644 --- a/driver/charger/rt946x.h +++ b/driver/charger/rt946x.h @@ -118,6 +118,8 @@ #define RT946X_REG_CHGNTC 0X4B #define RT946X_REG_ADCDATAH 0X4C #define RT946X_REG_ADCDATAL 0X4D +#define MT6370_REG_LDOCFG 0X80 +#define MT6370_REG_LDOVOUT 0X81 /* RGB led */ #define MT6370_REG_RGBDIM_BASE 0x81 #define MT6370_REG_RGB1DIM 0x82 @@ -206,6 +208,11 @@ #define RT946X_BATTEMP_COLD 0x05 #define RT946X_BATTEMP_HOT 0x06 +/* LDO voltage */ +#define MT6370_LDO_MIN 1600 +#define MT6370_LDO_MAX 4000 +#define MT6370_LDO_STEP 200 + /* ========== CORECTRL0 0x00 ============ */ #define RT946X_SHIFT_RST 7 @@ -379,6 +386,19 @@ #define RT946X_MASK_DPDMIRQ_ATTACH (1 << RT946X_SHIFT_DPDMIRQ_ATTACH) #endif + +/* ========== LDOCFG 0x80 (mt6370) ============ */ +#define MT6370_SHIFT_LDOCFG_OMS 6 + +#define MT6370_MASK_LDOCFG_OMS (1 << MT6370_SHIFT_LDOCFG_OMS) + +/* ========== LDOVOUT 0x81 (mt6370) ============ */ +#define MT6370_SHIFT_LDOVOUT_EN 7 +#define MT6370_SHIFT_LDOVOUT_VOUT 0 + +#define MT6370_MASK_LDOVOUT_EN (1 << MT6370_SHIFT_LDOVOUT_EN) +#define MT6370_MASK_LDOVOUT_VOUT (0xf << MT6370_SHIFT_LDOVOUT_VOUT) + /* ========== RGBDIM 0x82/0x83/0x84 (mt6370) ============ */ #define MT6370_LED_PWM_DIMDUTY_MIN 0x00 #define MT6370_LED_PWM_DIMDUTY_MAX 0x1f @@ -467,6 +487,12 @@ int rt946x_enable_charge_termination(int en); #ifdef CONFIG_CHARGER_MT6370 +/* + * Set LDO voltage. + * Disable LDO if voltage is zero. + */ +int mt6370_set_ldo_voltage(int mv); + enum mt6370_led_index { MT6370_LED_ID_OFF = 0, MT6370_LED_ID1 = 1, |