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backlight: qcom-wled: Rename PM8941* to WLED3

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Rename the PM8941* references as WLED3 to make the driver
generic and have WLED support for other PMICs. Also rename
"i_boost_limit" and "i_limit" variables to "boost_i_limit"
and "string_i_limit" respectively to resemble the corresponding
register names.

Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Kiran Gunda 2019-11-01 11:57:00 +05:30 committed by Lee Jones
parent 059dcfcb4a
commit bb800a3715
1 changed files with 125 additions and 123 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

248
drivers/video/backlight/qcom-wled.c
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@ -10,77 +10,79 @@
#include <linux/regmap.h>
/* From DT binding */
#define PM8941_WLED_DEFAULT_BRIGHTNESS 2048
#define WLED_DEFAULT_BRIGHTNESS 2048
#define PM8941_WLED_REG_VAL_BASE 0x40
#define PM8941_WLED_REG_VAL_MAX 0xFFF
#define WLED3_SINK_REG_BRIGHT_MAX 0xFFF
#define WLED3_CTRL_REG_VAL_BASE 0x40
#define PM8941_WLED_REG_MOD_EN 0x46
#define PM8941_WLED_REG_MOD_EN_BIT BIT(7)
#define PM8941_WLED_REG_MOD_EN_MASK BIT(7)
/* WLED3 control registers */
#define WLED3_CTRL_REG_MOD_EN 0x46
#define WLED3_CTRL_REG_MOD_EN_BIT BIT(7)
#define WLED3_CTRL_REG_MOD_EN_MASK BIT(7)
#define PM8941_WLED_REG_SYNC 0x47
#define PM8941_WLED_REG_SYNC_MASK 0x07
#define PM8941_WLED_REG_SYNC_LED1 BIT(0)
#define PM8941_WLED_REG_SYNC_LED2 BIT(1)
#define PM8941_WLED_REG_SYNC_LED3 BIT(2)
#define PM8941_WLED_REG_SYNC_ALL 0x07
#define PM8941_WLED_REG_SYNC_CLEAR 0x00
#define WLED3_CTRL_REG_FREQ 0x4c
#define WLED3_CTRL_REG_FREQ_MASK 0x0f
#define PM8941_WLED_REG_FREQ 0x4c
#define PM8941_WLED_REG_FREQ_MASK 0x0f
#define WLED3_CTRL_REG_OVP 0x4d
#define WLED3_CTRL_REG_OVP_MASK 0x03
#define PM8941_WLED_REG_OVP 0x4d
#define PM8941_WLED_REG_OVP_MASK 0x03
#define WLED3_CTRL_REG_ILIMIT 0x4e
#define WLED3_CTRL_REG_ILIMIT_MASK 0x07
#define PM8941_WLED_REG_BOOST 0x4e
#define PM8941_WLED_REG_BOOST_MASK 0x07
/* WLED3 sink registers */
#define WLED3_SINK_REG_SYNC 0x47
#define WLED3_SINK_REG_SYNC_MASK 0x07
#define WLED3_SINK_REG_SYNC_LED1 BIT(0)
#define WLED3_SINK_REG_SYNC_LED2 BIT(1)
#define WLED3_SINK_REG_SYNC_LED3 BIT(2)
#define WLED3_SINK_REG_SYNC_ALL 0x07
#define WLED3_SINK_REG_SYNC_CLEAR 0x00
#define PM8941_WLED_REG_SINK 0x4f
#define PM8941_WLED_REG_SINK_MASK 0xe0
#define PM8941_WLED_REG_SINK_SHFT 0x05
#define WLED3_SINK_REG_CURR_SINK 0x4f
#define WLED3_SINK_REG_CURR_SINK_MASK 0xe0
#define WLED3_SINK_REG_CURR_SINK_SHFT 0x05
/* Per-'string' registers below */
#define PM8941_WLED_REG_STR_OFFSET 0x10
/* WLED3 per-'string' registers below */
#define WLED3_SINK_REG_STR_OFFSET 0x10
#define PM8941_WLED_REG_STR_MOD_EN_BASE 0x60
#define PM8941_WLED_REG_STR_MOD_MASK BIT(7)
#define PM8941_WLED_REG_STR_MOD_EN BIT(7)
#define WLED3_SINK_REG_STR_MOD_EN_BASE 0x60
#define WLED3_SINK_REG_STR_MOD_MASK BIT(7)
#define WLED3_SINK_REG_STR_MOD_EN BIT(7)
#define PM8941_WLED_REG_STR_SCALE_BASE 0x62
#define PM8941_WLED_REG_STR_SCALE_MASK 0x1f
#define WLED3_SINK_REG_STR_FULL_SCALE_CURR 0x62
#define WLED3_SINK_REG_STR_FULL_SCALE_CURR_MASK 0x1f
#define PM8941_WLED_REG_STR_MOD_SRC_BASE 0x63
#define PM8941_WLED_REG_STR_MOD_SRC_MASK 0x01
#define PM8941_WLED_REG_STR_MOD_SRC_INT 0x00
#define PM8941_WLED_REG_STR_MOD_SRC_EXT 0x01
#define WLED3_SINK_REG_STR_MOD_SRC_BASE 0x63
#define WLED3_SINK_REG_STR_MOD_SRC_MASK 0x01
#define WLED3_SINK_REG_STR_MOD_SRC_INT 0x00
#define WLED3_SINK_REG_STR_MOD_SRC_EXT 0x01
#define PM8941_WLED_REG_STR_CABC_BASE 0x66
#define PM8941_WLED_REG_STR_CABC_MASK BIT(7)
#define PM8941_WLED_REG_STR_CABC_EN BIT(7)
#define WLED3_SINK_REG_STR_CABC_BASE 0x66
#define WLED3_SINK_REG_STR_CABC_MASK BIT(7)
#define WLED3_SINK_REG_STR_CABC_EN BIT(7)
struct pm8941_wled_config {
u32 i_boost_limit;
struct wled_config {
u32 boost_i_limit;
u32 ovp;
u32 switch_freq;
u32 num_strings;
u32 i_limit;
u32 string_i_limit;
bool cs_out_en;
bool ext_gen;
bool cabc_en;
};
struct pm8941_wled {
struct wled {
const char *name;
struct regmap *regmap;
u16 addr;
struct pm8941_wled_config cfg;
struct wled_config cfg;
};
static int pm8941_wled_update_status(struct backlight_device *bl)
static int wled_update_status(struct backlight_device *bl)
{
struct pm8941_wled *wled = bl_get_data(bl);
struct wled *wled = bl_get_data(bl);
u16 val = bl->props.brightness;
u8 ctrl = 0;
int rc;
@ -92,11 +94,11 @@ static int pm8941_wled_update_status(struct backlight_device *bl)
val = 0;
if (val != 0)
ctrl = PM8941_WLED_REG_MOD_EN_BIT;
ctrl = WLED3_CTRL_REG_MOD_EN_BIT;
rc = regmap_update_bits(wled->regmap,
wled->addr + PM8941_WLED_REG_MOD_EN,
PM8941_WLED_REG_MOD_EN_MASK, ctrl);
wled->addr + WLED3_CTRL_REG_MOD_EN,
WLED3_CTRL_REG_MOD_EN_MASK, ctrl);
if (rc)
return rc;
@ -104,89 +106,89 @@ static int pm8941_wled_update_status(struct backlight_device *bl)
u8 v[2] = { val & 0xff, (val >> 8) & 0xf };
rc = regmap_bulk_write(wled->regmap,
wled->addr + PM8941_WLED_REG_VAL_BASE + 2 * i,
wled->addr + WLED3_CTRL_REG_VAL_BASE + 2 * i,
v, 2);
if (rc)
return rc;
}
rc = regmap_update_bits(wled->regmap,
wled->addr + PM8941_WLED_REG_SYNC,
PM8941_WLED_REG_SYNC_MASK, PM8941_WLED_REG_SYNC_ALL);
wled->addr + WLED3_SINK_REG_SYNC,
WLED3_SINK_REG_SYNC_MASK, WLED3_SINK_REG_SYNC_ALL);
if (rc)
return rc;
rc = regmap_update_bits(wled->regmap,
wled->addr + PM8941_WLED_REG_SYNC,
PM8941_WLED_REG_SYNC_MASK, PM8941_WLED_REG_SYNC_CLEAR);
wled->addr + WLED3_SINK_REG_SYNC,
WLED3_SINK_REG_SYNC_MASK, WLED3_SINK_REG_SYNC_CLEAR);
return rc;
}
static int pm8941_wled_setup(struct pm8941_wled *wled)
static int wled_setup(struct wled *wled)
{
int rc;
int i;
rc = regmap_update_bits(wled->regmap,
wled->addr + PM8941_WLED_REG_OVP,
PM8941_WLED_REG_OVP_MASK, wled->cfg.ovp);
wled->addr + WLED3_CTRL_REG_OVP,
WLED3_CTRL_REG_OVP_MASK, wled->cfg.ovp);
if (rc)
return rc;
rc = regmap_update_bits(wled->regmap,
wled->addr + PM8941_WLED_REG_BOOST,
PM8941_WLED_REG_BOOST_MASK, wled->cfg.i_boost_limit);
wled->addr + WLED3_CTRL_REG_ILIMIT,
WLED3_CTRL_REG_ILIMIT_MASK, wled->cfg.boost_i_limit);
if (rc)
return rc;
rc = regmap_update_bits(wled->regmap,
wled->addr + PM8941_WLED_REG_FREQ,
PM8941_WLED_REG_FREQ_MASK, wled->cfg.switch_freq);
wled->addr + WLED3_CTRL_REG_FREQ,
WLED3_CTRL_REG_FREQ_MASK, wled->cfg.switch_freq);
if (rc)
return rc;
if (wled->cfg.cs_out_en) {
u8 all = (BIT(wled->cfg.num_strings) - 1)
<< PM8941_WLED_REG_SINK_SHFT;
<< WLED3_SINK_REG_CURR_SINK_SHFT;
rc = regmap_update_bits(wled->regmap,
wled->addr + PM8941_WLED_REG_SINK,
PM8941_WLED_REG_SINK_MASK, all);
wled->addr + WLED3_SINK_REG_CURR_SINK,
WLED3_SINK_REG_CURR_SINK_MASK, all);
if (rc)
return rc;
}
for (i = 0; i < wled->cfg.num_strings; ++i) {
u16 addr = wled->addr + PM8941_WLED_REG_STR_OFFSET * i;
u16 addr = wled->addr + WLED3_SINK_REG_STR_OFFSET * i;
rc = regmap_update_bits(wled->regmap,
addr + PM8941_WLED_REG_STR_MOD_EN_BASE,
PM8941_WLED_REG_STR_MOD_MASK,
PM8941_WLED_REG_STR_MOD_EN);
addr + WLED3_SINK_REG_STR_MOD_EN_BASE,
WLED3_SINK_REG_STR_MOD_MASK,
WLED3_SINK_REG_STR_MOD_EN);
if (rc)
return rc;
if (wled->cfg.ext_gen) {
rc = regmap_update_bits(wled->regmap,
addr + PM8941_WLED_REG_STR_MOD_SRC_BASE,
PM8941_WLED_REG_STR_MOD_SRC_MASK,
PM8941_WLED_REG_STR_MOD_SRC_EXT);
addr + WLED3_SINK_REG_STR_MOD_SRC_BASE,
WLED3_SINK_REG_STR_MOD_SRC_MASK,
WLED3_SINK_REG_STR_MOD_SRC_EXT);
if (rc)
return rc;
}
rc = regmap_update_bits(wled->regmap,
addr + PM8941_WLED_REG_STR_SCALE_BASE,
PM8941_WLED_REG_STR_SCALE_MASK,
wled->cfg.i_limit);
addr + WLED3_SINK_REG_STR_FULL_SCALE_CURR,
WLED3_SINK_REG_STR_FULL_SCALE_CURR_MASK,
wled->cfg.string_i_limit);
if (rc)
return rc;
rc = regmap_update_bits(wled->regmap,
addr + PM8941_WLED_REG_STR_CABC_BASE,
PM8941_WLED_REG_STR_CABC_MASK,
addr + WLED3_SINK_REG_STR_CABC_BASE,
WLED3_SINK_REG_STR_CABC_MASK,
wled->cfg.cabc_en ?
PM8941_WLED_REG_STR_CABC_EN : 0);
WLED3_SINK_REG_STR_CABC_EN : 0);
if (rc)
return rc;
}
@ -194,9 +196,9 @@ static int pm8941_wled_setup(struct pm8941_wled *wled)
return 0;
}
static const struct pm8941_wled_config pm8941_wled_config_defaults = {
.i_boost_limit = 3,
.i_limit = 20,
static const struct wled_config wled3_config_defaults = {
.boost_i_limit = 3,
.string_i_limit = 20,
.ovp = 2,
.switch_freq = 5,
.num_strings = 0,
@ -205,55 +207,55 @@ static const struct pm8941_wled_config pm8941_wled_config_defaults = {
.cabc_en = false,
};
struct pm8941_wled_var_cfg {
struct wled_var_cfg {
const u32 *values;
u32 (*fn)(u32);
int size;
};
static const u32 pm8941_wled_i_boost_limit_values[] = {
static const u32 wled3_boost_i_limit_values[] = {
105, 385, 525, 805, 980, 1260, 1400, 1680,
};
static const struct pm8941_wled_var_cfg pm8941_wled_i_boost_limit_cfg = {
.values = pm8941_wled_i_boost_limit_values,
.size = ARRAY_SIZE(pm8941_wled_i_boost_limit_values),
static const struct wled_var_cfg wled3_boost_i_limit_cfg = {
.values = wled3_boost_i_limit_values,
.size = ARRAY_SIZE(wled3_boost_i_limit_values),
};
static const u32 pm8941_wled_ovp_values[] = {
static const u32 wled3_ovp_values[] = {
35, 32, 29, 27,
};
static const struct pm8941_wled_var_cfg pm8941_wled_ovp_cfg = {
.values = pm8941_wled_ovp_values,
.size = ARRAY_SIZE(pm8941_wled_ovp_values),
static const struct wled_var_cfg wled3_ovp_cfg = {
.values = wled3_ovp_values,
.size = ARRAY_SIZE(wled3_ovp_values),
};
static u32 pm8941_wled_num_strings_values_fn(u32 idx)
static u32 wled3_num_strings_values_fn(u32 idx)
{
return idx + 1;
}
static const struct pm8941_wled_var_cfg pm8941_wled_num_strings_cfg = {
.fn = pm8941_wled_num_strings_values_fn,
static const struct wled_var_cfg wled3_num_strings_cfg = {
.fn = wled3_num_strings_values_fn,
.size = 3,
};
static u32 pm8941_wled_switch_freq_values_fn(u32 idx)
static u32 wled3_switch_freq_values_fn(u32 idx)
{
return 19200 / (2 * (1 + idx));
}
static const struct pm8941_wled_var_cfg pm8941_wled_switch_freq_cfg = {
.fn = pm8941_wled_switch_freq_values_fn,
static const struct wled_var_cfg wled3_switch_freq_cfg = {
.fn = wled3_switch_freq_values_fn,
.size = 16,
};
static const struct pm8941_wled_var_cfg pm8941_wled_i_limit_cfg = {
static const struct wled_var_cfg wled3_string_i_limit_cfg = {
.size = 26,
};
static u32 pm8941_wled_values(const struct pm8941_wled_var_cfg *cfg, u32 idx)
static u32 wled3_values(const struct wled_var_cfg *cfg, u32 idx)
{
if (idx >= cfg->size)
return UINT_MAX;
@ -264,9 +266,9 @@ static u32 pm8941_wled_values(const struct pm8941_wled_var_cfg *cfg, u32 idx)
return idx;
}
static int pm8941_wled_configure(struct pm8941_wled *wled, struct device *dev)
static int wled_configure(struct wled *wled, struct device *dev)
{
struct pm8941_wled_config *cfg = &wled->cfg;
struct wled_config *cfg = &wled->cfg;
u32 val;
int rc;
u32 c;
@ -276,32 +278,32 @@ static int pm8941_wled_configure(struct pm8941_wled *wled, struct device *dev)
const struct {
const char *name;
u32 *val_ptr;
const struct pm8941_wled_var_cfg *cfg;
const struct wled_var_cfg *cfg;
} u32_opts[] = {
{
"qcom,current-boost-limit",
&cfg->i_boost_limit,
.cfg = &pm8941_wled_i_boost_limit_cfg,
&cfg->boost_i_limit,
.cfg = &wled3_boost_i_limit_cfg,
},
{
"qcom,current-limit",
&cfg->i_limit,
.cfg = &pm8941_wled_i_limit_cfg,
&cfg->string_i_limit,
.cfg = &wled3_string_i_limit_cfg,
},
{
"qcom,ovp",
&cfg->ovp,
.cfg = &pm8941_wled_ovp_cfg,
.cfg = &wled3_ovp_cfg,
},
{
"qcom,switching-freq",
&cfg->switch_freq,
.cfg = &pm8941_wled_switch_freq_cfg,
.cfg = &wled3_switch_freq_cfg,
},
{
"qcom,num-strings",
&cfg->num_strings,
.cfg = &pm8941_wled_num_strings_cfg,
.cfg = &wled3_num_strings_cfg,
},
};
const struct {
@ -324,7 +326,7 @@ static int pm8941_wled_configure(struct pm8941_wled *wled, struct device *dev)
if (rc)
wled->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFn", dev->of_node);
*cfg = pm8941_wled_config_defaults;
*cfg = wled3_config_defaults;
for (i = 0; i < ARRAY_SIZE(u32_opts); ++i) {
rc = of_property_read_u32(dev->of_node, u32_opts[i].name, &val);
if (rc == -EINVAL) {
@ -336,7 +338,7 @@ static int pm8941_wled_configure(struct pm8941_wled *wled, struct device *dev)
c = UINT_MAX;
for (j = 0; c != val; j++) {
c = pm8941_wled_values(u32_opts[i].cfg, j);
c = wled3_values(u32_opts[i].cfg, j);
if (c == UINT_MAX) {
dev_err(dev, "invalid value for '%s'\n",
u32_opts[i].name);
@ -358,15 +360,15 @@ static int pm8941_wled_configure(struct pm8941_wled *wled, struct device *dev)
return 0;
}
static const struct backlight_ops pm8941_wled_ops = {
.update_status = pm8941_wled_update_status,
static const struct backlight_ops wled_ops = {
.update_status = wled_update_status,
};
static int pm8941_wled_probe(struct platform_device *pdev)
static int wled_probe(struct platform_device *pdev)
{
struct backlight_properties props;
struct backlight_device *bl;
struct pm8941_wled *wled;
struct wled *wled;
struct regmap *regmap;
u32 val;
int rc;
@ -383,42 +385,42 @@ static int pm8941_wled_probe(struct platform_device *pdev)
wled->regmap = regmap;
rc = pm8941_wled_configure(wled, &pdev->dev);
rc = wled_configure(wled, &pdev->dev);
if (rc)
return rc;
rc = pm8941_wled_setup(wled);
rc = wled_setup(wled);
if (rc)
return rc;
val = PM8941_WLED_DEFAULT_BRIGHTNESS;
val = WLED_DEFAULT_BRIGHTNESS;
of_property_read_u32(pdev->dev.of_node, "default-brightness", &val);
memset(&props, 0, sizeof(struct backlight_properties));
props.type = BACKLIGHT_RAW;
props.brightness = val;
props.max_brightness = PM8941_WLED_REG_VAL_MAX;
props.max_brightness = WLED3_SINK_REG_BRIGHT_MAX;
bl = devm_backlight_device_register(&pdev->dev, wled->name,
&pdev->dev, wled,
&pm8941_wled_ops, &props);
&wled_ops, &props);
return PTR_ERR_OR_ZERO(bl);
};
static const struct of_device_id pm8941_wled_match_table[] = {
static const struct of_device_id wled_match_table[] = {
{ .compatible = "qcom,pm8941-wled" },
{}
};
MODULE_DEVICE_TABLE(of, pm8941_wled_match_table);
MODULE_DEVICE_TABLE(of, wled_match_table);
static struct platform_driver pm8941_wled_driver = {
.probe = pm8941_wled_probe,
static struct platform_driver wled_driver = {
.probe = wled_probe,
.driver = {
.name = "pm8941-wled",
.of_match_table = pm8941_wled_match_table,
.name = "qcom,wled",
.of_match_table = wled_match_table,
},
};
module_platform_driver(pm8941_wled_driver);
module_platform_driver(wled_driver);
MODULE_DESCRIPTION("pm8941 wled driver");
MODULE_DESCRIPTION("Qualcomm WLED driver");
MODULE_LICENSE("GPL v2");