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backlight: qcom-wled: Add support for WLED4 peripheral
WLED4 peripheral is present on some PMICs like pmi8998 and pm660l. It has a different register map and configurations are also different. Add support for it. Signed-off-by: Kiran Gunda <kgunda@codeaurora.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Kiran Gunda
Lee Jones
parent
775d2ffb4a
commit
03b2b5e869
@ -17,7 +17,7 @@
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#define WLED3_SINK_REG_BRIGHT_MAX 0xFFF
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/* WLED3 control registers */
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/* WLED3/WLED4 control registers */
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#define WLED3_CTRL_REG_MOD_EN 0x46
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#define WLED3_CTRL_REG_MOD_EN_MASK BIT(7)
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#define WLED3_CTRL_REG_MOD_EN_SHIFT 7
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@ -31,7 +31,7 @@
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#define WLED3_CTRL_REG_ILIMIT 0x4e
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#define WLED3_CTRL_REG_ILIMIT_MASK GENMASK(2, 0)
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/* WLED3 sink registers */
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/* WLED3/WLED4 sink registers */
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#define WLED3_SINK_REG_SYNC 0x47
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#define WLED3_SINK_REG_SYNC_CLEAR 0x00
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@ -56,6 +56,28 @@
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#define WLED3_SINK_REG_STR_CABC(n) (0x66 + (n * 0x10))
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#define WLED3_SINK_REG_STR_CABC_MASK BIT(7)
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/* WLED4 specific sink registers */
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#define WLED4_SINK_REG_CURR_SINK 0x46
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#define WLED4_SINK_REG_CURR_SINK_MASK GENMASK(7, 4)
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#define WLED4_SINK_REG_CURR_SINK_SHFT 4
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/* WLED4 specific per-'string' registers below */
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#define WLED4_SINK_REG_STR_MOD_EN(n) (0x50 + (n * 0x10))
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#define WLED4_SINK_REG_STR_MOD_MASK BIT(7)
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#define WLED4_SINK_REG_STR_FULL_SCALE_CURR(n) (0x52 + (n * 0x10))
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#define WLED4_SINK_REG_STR_FULL_SCALE_CURR_MASK GENMASK(3, 0)
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#define WLED4_SINK_REG_STR_MOD_SRC(n) (0x53 + (n * 0x10))
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#define WLED4_SINK_REG_STR_MOD_SRC_MASK BIT(0)
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#define WLED4_SINK_REG_STR_MOD_SRC_INT 0x00
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#define WLED4_SINK_REG_STR_MOD_SRC_EXT 0x01
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#define WLED4_SINK_REG_STR_CABC(n) (0x56 + (n * 0x10))
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#define WLED4_SINK_REG_STR_CABC_MASK BIT(7)
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#define WLED4_SINK_REG_BRIGHT(n) (0x57 + (n * 0x10))
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struct wled_var_cfg {
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const u32 *values;
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u32 (*fn)(u32);
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@ -90,6 +112,7 @@ struct wled {
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struct device *dev;
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struct regmap *regmap;
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u16 ctrl_addr;
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u16 sink_addr;
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u16 max_string_count;
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u32 brightness;
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u32 max_brightness;
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@ -116,6 +139,29 @@ static int wled3_set_brightness(struct wled *wled, u16 brightness)
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return 0;
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}
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static int wled4_set_brightness(struct wled *wled, u16 brightness)
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{
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int rc, i;
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u16 low_limit = wled->max_brightness * 4 / 1000;
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u8 v[2];
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/* WLED4's lower limit of operation is 0.4% */
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if (brightness > 0 && brightness < low_limit)
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brightness = low_limit;
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v[0] = brightness & 0xff;
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v[1] = (brightness >> 8) & 0xf;
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for (i = 0; i < wled->cfg.num_strings; ++i) {
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rc = regmap_bulk_write(wled->regmap, wled->sink_addr +
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WLED4_SINK_REG_BRIGHT(i), v, 2);
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if (rc < 0)
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return rc;
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}
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return 0;
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}
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static int wled_module_enable(struct wled *wled, int val)
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{
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int rc;
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@ -267,6 +313,120 @@ static const struct wled_config wled3_config_defaults = {
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.enabled_strings = {0, 1, 2, 3},
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};
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static int wled4_setup(struct wled *wled)
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{
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int rc, temp, i, j;
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u16 addr;
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u8 sink_en = 0;
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u32 sink_cfg = 0;
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rc = regmap_update_bits(wled->regmap,
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wled->ctrl_addr + WLED3_CTRL_REG_OVP,
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WLED3_CTRL_REG_OVP_MASK, wled->cfg.ovp);
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if (rc < 0)
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return rc;
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rc = regmap_update_bits(wled->regmap,
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wled->ctrl_addr + WLED3_CTRL_REG_ILIMIT,
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WLED3_CTRL_REG_ILIMIT_MASK,
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wled->cfg.boost_i_limit);
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if (rc < 0)
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return rc;
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rc = regmap_update_bits(wled->regmap,
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wled->ctrl_addr + WLED3_CTRL_REG_FREQ,
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WLED3_CTRL_REG_FREQ_MASK,
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wled->cfg.switch_freq);
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if (rc < 0)
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return rc;
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rc = regmap_read(wled->regmap, wled->sink_addr +
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WLED4_SINK_REG_CURR_SINK, &sink_cfg);
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if (rc < 0)
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return rc;
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for (i = 0; i < wled->cfg.num_strings; i++) {
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j = wled->cfg.enabled_strings[i];
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temp = j + WLED4_SINK_REG_CURR_SINK_SHFT;
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sink_en |= 1 << temp;
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}
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if (sink_cfg == sink_en)
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return 0;
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rc = regmap_update_bits(wled->regmap,
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wled->sink_addr + WLED4_SINK_REG_CURR_SINK,
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WLED4_SINK_REG_CURR_SINK_MASK, 0);
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if (rc < 0)
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return rc;
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rc = regmap_update_bits(wled->regmap, wled->ctrl_addr +
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WLED3_CTRL_REG_MOD_EN,
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WLED3_CTRL_REG_MOD_EN_MASK, 0);
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if (rc < 0)
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return rc;
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/* Per sink/string configuration */
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for (i = 0; i < wled->cfg.num_strings; i++) {
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j = wled->cfg.enabled_strings[i];
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addr = wled->sink_addr +
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WLED4_SINK_REG_STR_MOD_EN(j);
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rc = regmap_update_bits(wled->regmap, addr,
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WLED4_SINK_REG_STR_MOD_MASK,
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WLED4_SINK_REG_STR_MOD_MASK);
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if (rc < 0)
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return rc;
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addr = wled->sink_addr +
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WLED4_SINK_REG_STR_FULL_SCALE_CURR(j);
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rc = regmap_update_bits(wled->regmap, addr,
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WLED4_SINK_REG_STR_FULL_SCALE_CURR_MASK,
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wled->cfg.string_i_limit);
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if (rc < 0)
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return rc;
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addr = wled->sink_addr +
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WLED4_SINK_REG_STR_CABC(j);
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rc = regmap_update_bits(wled->regmap, addr,
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WLED4_SINK_REG_STR_CABC_MASK,
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wled->cfg.cabc ?
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WLED4_SINK_REG_STR_CABC_MASK : 0);
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if (rc < 0)
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return rc;
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}
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rc = regmap_update_bits(wled->regmap, wled->ctrl_addr +
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WLED3_CTRL_REG_MOD_EN,
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WLED3_CTRL_REG_MOD_EN_MASK,
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WLED3_CTRL_REG_MOD_EN_MASK);
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if (rc < 0)
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return rc;
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rc = regmap_update_bits(wled->regmap,
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wled->sink_addr + WLED4_SINK_REG_CURR_SINK,
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WLED4_SINK_REG_CURR_SINK_MASK, sink_en);
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if (rc < 0)
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return rc;
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rc = wled_sync_toggle(wled);
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if (rc < 0) {
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dev_err(wled->dev, "Failed to toggle sync reg rc:%d\n", rc);
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return rc;
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}
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return 0;
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}
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static const struct wled_config wled4_config_defaults = {
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.boost_i_limit = 4,
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.string_i_limit = 10,
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.ovp = 1,
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.num_strings = 4,
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.switch_freq = 11,
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.cabc = false,
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};
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static const u32 wled3_boost_i_limit_values[] = {
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105, 385, 525, 805, 980, 1260, 1400, 1680,
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};
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@ -276,6 +436,15 @@ static const struct wled_var_cfg wled3_boost_i_limit_cfg = {
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.size = ARRAY_SIZE(wled3_boost_i_limit_values),
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};
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static const u32 wled4_boost_i_limit_values[] = {
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105, 280, 450, 620, 970, 1150, 1300, 1500,
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};
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static const struct wled_var_cfg wled4_boost_i_limit_cfg = {
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.values = wled4_boost_i_limit_values,
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.size = ARRAY_SIZE(wled4_boost_i_limit_values),
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};
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static const u32 wled3_ovp_values[] = {
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35, 32, 29, 27,
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};
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@ -285,6 +454,15 @@ static const struct wled_var_cfg wled3_ovp_cfg = {
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.size = ARRAY_SIZE(wled3_ovp_values),
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};
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static const u32 wled4_ovp_values[] = {
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31100, 29600, 19600, 18100,
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};
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static const struct wled_var_cfg wled4_ovp_cfg = {
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.values = wled4_ovp_values,
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.size = ARRAY_SIZE(wled4_ovp_values),
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};
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static u32 wled3_num_strings_values_fn(u32 idx)
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{
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return idx + 1;
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@ -295,6 +473,11 @@ static const struct wled_var_cfg wled3_num_strings_cfg = {
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.size = 3,
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};
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static const struct wled_var_cfg wled4_num_strings_cfg = {
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.fn = wled3_num_strings_values_fn,
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.size = 4,
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};
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static u32 wled3_switch_freq_values_fn(u32 idx)
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{
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return 19200 / (2 * (1 + idx));
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@ -309,10 +492,24 @@ static const struct wled_var_cfg wled3_string_i_limit_cfg = {
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.size = 26,
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};
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static const u32 wled4_string_i_limit_values[] = {
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0, 2500, 5000, 7500, 10000, 12500, 15000, 17500, 20000,
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22500, 25000, 27500, 30000,
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};
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static const struct wled_var_cfg wled4_string_i_limit_cfg = {
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.values = wled4_string_i_limit_values,
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.size = ARRAY_SIZE(wled4_string_i_limit_values),
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};
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static const struct wled_var_cfg wled3_string_cfg = {
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.size = 8,
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};
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static const struct wled_var_cfg wled4_string_cfg = {
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.size = 16,
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};
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static u32 wled_values(const struct wled_var_cfg *cfg, u32 idx)
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{
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if (idx >= cfg->size)
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@ -361,6 +558,34 @@ static int wled_configure(struct wled *wled, int version)
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},
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};
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const struct wled_u32_opts wled4_opts[] = {
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{
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.name = "qcom,current-boost-limit",
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.val_ptr = &cfg->boost_i_limit,
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.cfg = &wled4_boost_i_limit_cfg,
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},
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{
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.name = "qcom,current-limit-microamp",
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.val_ptr = &cfg->string_i_limit,
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.cfg = &wled4_string_i_limit_cfg,
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},
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{
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.name = "qcom,ovp-millivolt",
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.val_ptr = &cfg->ovp,
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.cfg = &wled4_ovp_cfg,
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},
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{
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.name = "qcom,switching-freq",
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.val_ptr = &cfg->switch_freq,
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.cfg = &wled3_switch_freq_cfg,
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},
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{
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.name = "qcom,num-strings",
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.val_ptr = &cfg->num_strings,
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.cfg = &wled4_num_strings_cfg,
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},
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};
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const struct wled_bool_opts bool_opts[] = {
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{ "qcom,cs-out", &cfg->cs_out_en, },
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{ "qcom,ext-gen", &cfg->ext_gen, },
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@ -385,6 +610,22 @@ static int wled_configure(struct wled *wled, int version)
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*cfg = wled3_config_defaults;
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wled->wled_set_brightness = wled3_set_brightness;
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wled->max_string_count = 3;
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wled->sink_addr = wled->ctrl_addr;
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break;
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case 4:
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u32_opts = wled4_opts;
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size = ARRAY_SIZE(wled4_opts);
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*cfg = wled4_config_defaults;
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wled->wled_set_brightness = wled4_set_brightness;
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wled->max_string_count = 4;
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prop_addr = of_get_address(dev->of_node, 1, NULL, NULL);
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if (!prop_addr) {
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dev_err(wled->dev, "invalid IO resources\n");
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return -EINVAL;
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}
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wled->sink_addr = be32_to_cpu(*prop_addr);
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break;
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default:
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@ -483,6 +724,14 @@ static int wled_probe(struct platform_device *pdev)
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}
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break;
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case 4:
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rc = wled4_setup(wled);
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if (rc) {
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dev_err(&pdev->dev, "wled4_setup failed\n");
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return rc;
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}
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break;
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default:
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dev_err(wled->dev, "Invalid WLED version\n");
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break;
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@ -503,6 +752,8 @@ static int wled_probe(struct platform_device *pdev)
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static const struct of_device_id wled_match_table[] = {
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{ .compatible = "qcom,pm8941-wled", .data = (void *)3 },
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{ .compatible = "qcom,pmi8998-wled", .data = (void *)4 },
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{ .compatible = "qcom,pm660l-wled", .data = (void *)4 },
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{}
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};
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MODULE_DEVICE_TABLE(of, wled_match_table);
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