diff options
Diffstat (limited to 'drivers/leds/leds-lm3530.c')
| -rw-r--r-- | drivers/leds/leds-lm3530.c | 100 |
1 files changed, 58 insertions, 42 deletions
diff --git a/drivers/leds/leds-lm3530.c b/drivers/leds/leds-lm3530.c index 968fd5fef4fc..84ba6de8039c 100644 --- a/drivers/leds/leds-lm3530.c +++ b/drivers/leds/leds-lm3530.c @@ -113,6 +113,18 @@ struct lm3530_data { bool enable; }; +/* + * struct lm3530_als_data + * @config : value of ALS configuration register + * @imp_sel : value of ALS resistor select register + * @zone : values of ALS ZB(Zone Boundary) registers + */ +struct lm3530_als_data { + u8 config; + u8 imp_sel; + u8 zones[LM3530_ALS_ZB_MAX]; +}; + static const u8 lm3530_reg[LM3530_REG_MAX] = { LM3530_GEN_CONFIG, LM3530_ALS_CONFIG, @@ -141,29 +153,65 @@ static int lm3530_get_mode_from_str(const char *str) return -1; } +static void lm3530_als_configure(struct lm3530_platform_data *pdata, + struct lm3530_als_data *als) +{ + int i; + u32 als_vmin, als_vmax, als_vstep; + + if (pdata->als_vmax == 0) { + pdata->als_vmin = 0; + pdata->als_vmax = LM3530_ALS_WINDOW_mV; + } + + als_vmin = pdata->als_vmin; + als_vmax = pdata->als_vmax; + + if ((als_vmax - als_vmin) > LM3530_ALS_WINDOW_mV) + pdata->als_vmax = als_vmax = als_vmin + LM3530_ALS_WINDOW_mV; + + /* n zone boundary makes n+1 zones */ + als_vstep = (als_vmax - als_vmin) / (LM3530_ALS_ZB_MAX + 1); + + for (i = 0; i < LM3530_ALS_ZB_MAX; i++) + als->zones[i] = (((als_vmin + LM3530_ALS_OFFSET_mV) + + als_vstep + (i * als_vstep)) * LED_FULL) / 1000; + + als->config = + (pdata->als_avrg_time << LM3530_ALS_AVG_TIME_SHIFT) | + (LM3530_ENABLE_ALS) | + (pdata->als_input_mode << LM3530_ALS_SEL_SHIFT); + + als->imp_sel = + (pdata->als1_resistor_sel << LM3530_ALS1_IMP_SHIFT) | + (pdata->als2_resistor_sel << LM3530_ALS2_IMP_SHIFT); +} + static int lm3530_init_registers(struct lm3530_data *drvdata) { int ret = 0; int i; u8 gen_config; - u8 als_config = 0; u8 brt_ramp; - u8 als_imp_sel = 0; u8 brightness; u8 reg_val[LM3530_REG_MAX]; - u8 zones[LM3530_ALS_ZB_MAX]; - u32 als_vmin, als_vmax, als_vstep; struct lm3530_platform_data *pdata = drvdata->pdata; struct i2c_client *client = drvdata->client; struct lm3530_pwm_data *pwm = &pdata->pwm_data; + struct lm3530_als_data als; + + memset(&als, 0, sizeof(struct lm3530_als_data)); gen_config = (pdata->brt_ramp_law << LM3530_RAMP_LAW_SHIFT) | ((pdata->max_current & 7) << LM3530_MAX_CURR_SHIFT); switch (drvdata->mode) { case LM3530_BL_MODE_MANUAL: + gen_config |= LM3530_ENABLE_I2C; + break; case LM3530_BL_MODE_ALS: gen_config |= LM3530_ENABLE_I2C; + lm3530_als_configure(pdata, &als); break; case LM3530_BL_MODE_PWM: gen_config |= LM3530_ENABLE_PWM | LM3530_ENABLE_PWM_SIMPLE | @@ -171,38 +219,6 @@ static int lm3530_init_registers(struct lm3530_data *drvdata) break; } - if (drvdata->mode == LM3530_BL_MODE_ALS) { - if (pdata->als_vmax == 0) { - pdata->als_vmin = 0; - pdata->als_vmax = LM3530_ALS_WINDOW_mV; - } - - als_vmin = pdata->als_vmin; - als_vmax = pdata->als_vmax; - - if ((als_vmax - als_vmin) > LM3530_ALS_WINDOW_mV) - pdata->als_vmax = als_vmax = - als_vmin + LM3530_ALS_WINDOW_mV; - - /* n zone boundary makes n+1 zones */ - als_vstep = (als_vmax - als_vmin) / (LM3530_ALS_ZB_MAX + 1); - - for (i = 0; i < LM3530_ALS_ZB_MAX; i++) - zones[i] = (((als_vmin + LM3530_ALS_OFFSET_mV) + - als_vstep + (i * als_vstep)) * LED_FULL) - / 1000; - - als_config = - (pdata->als_avrg_time << LM3530_ALS_AVG_TIME_SHIFT) | - (LM3530_ENABLE_ALS) | - (pdata->als_input_mode << LM3530_ALS_SEL_SHIFT); - - als_imp_sel = - (pdata->als1_resistor_sel << LM3530_ALS1_IMP_SHIFT) | - (pdata->als2_resistor_sel << LM3530_ALS2_IMP_SHIFT); - - } - brt_ramp = (pdata->brt_ramp_fall << LM3530_BRT_RAMP_FALL_SHIFT) | (pdata->brt_ramp_rise << LM3530_BRT_RAMP_RISE_SHIFT); @@ -215,14 +231,14 @@ static int lm3530_init_registers(struct lm3530_data *drvdata) brightness = drvdata->led_dev.max_brightness; reg_val[0] = gen_config; /* LM3530_GEN_CONFIG */ - reg_val[1] = als_config; /* LM3530_ALS_CONFIG */ + reg_val[1] = als.config; /* LM3530_ALS_CONFIG */ reg_val[2] = brt_ramp; /* LM3530_BRT_RAMP_RATE */ - reg_val[3] = als_imp_sel; /* LM3530_ALS_IMP_SELECT */ + reg_val[3] = als.imp_sel; /* LM3530_ALS_IMP_SELECT */ reg_val[4] = brightness; /* LM3530_BRT_CTRL_REG */ - reg_val[5] = zones[0]; /* LM3530_ALS_ZB0_REG */ - reg_val[6] = zones[1]; /* LM3530_ALS_ZB1_REG */ - reg_val[7] = zones[2]; /* LM3530_ALS_ZB2_REG */ - reg_val[8] = zones[3]; /* LM3530_ALS_ZB3_REG */ + reg_val[5] = als.zones[0]; /* LM3530_ALS_ZB0_REG */ + reg_val[6] = als.zones[1]; /* LM3530_ALS_ZB1_REG */ + reg_val[7] = als.zones[2]; /* LM3530_ALS_ZB2_REG */ + reg_val[8] = als.zones[3]; /* LM3530_ALS_ZB3_REG */ reg_val[9] = LM3530_DEF_ZT_0; /* LM3530_ALS_Z0T_REG */ reg_val[10] = LM3530_DEF_ZT_1; /* LM3530_ALS_Z1T_REG */ reg_val[11] = LM3530_DEF_ZT_2; /* LM3530_ALS_Z2T_REG */ |