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Message-Id: <20220628174627.2821722-3-vincent.knecht@mailoo.org>
Date: Tue, 28 Jun 2022 19:46:24 +0200
From: Vincent Knecht <vincent.knecht@...loo.org>
To: Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Vincent Knecht <vincent.knecht@...loo.org>,
linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v1 7/7] leds: is31fl319x: Add support for is31fl319{0,1,3} chips
Set specific chipset structs values for is31fl319{0,1,3}
so that those chips can actually work.
Datasheets:
https://lumissil.com/assets/pdf/core/IS31FL3190_DS.pdf
https://lumissil.com/assets/pdf/core/IS31FL3191_DS.pdf
https://lumissil.com/assets/pdf/core/IS31FL3193_DS.pdf
https://lumissil.com/assets/pdf/core/IS31FL3196_DS.pdf
https://lumissil.com/assets/pdf/core/IS31FL3199_DS.pdf
Signed-off-by: Vincent Knecht <vincent.knecht@...loo.org>
---
drivers/leds/leds-is31fl319x.c | 164 ++++++++++++++++++++++++++++++---
1 file changed, 150 insertions(+), 14 deletions(-)
diff --git a/drivers/leds/leds-is31fl319x.c b/drivers/leds/leds-is31fl319x.c
index eb8601a203a8..0260c28de96a 100644
--- a/drivers/leds/leds-is31fl319x.c
+++ b/drivers/leds/leds-is31fl319x.c
@@ -21,6 +21,31 @@
/* register numbers */
#define IS31FL319X_SHUTDOWN 0x00
+
+/* registers for 3190, 3191 and 3193 */
+#define IS31FL3190_BREATHING 0x01
+#define IS31FL3190_LEDMODE 0x02
+#define IS31FL3190_CURRENT 0x03
+#define IS31FL3190_PWM(channel) (0x04 + channel)
+#define IS31FL3190_DATA_UPDATE 0x07
+#define IS31FL3190_T0(channel) (0x0a + channel)
+#define IS31FL3190_T1T2(channel) (0x10 + channel)
+#define IS31FL3190_T3T4(channel) (0x16 + channel)
+#define IS31FL3190_TIME_UPDATE 0x1c
+#define IS31FL3190_LEDCONTROL 0x1d
+#define IS31FL3190_RESET 0x2f
+
+#define IS31FL3190_CURRENT_MIN ((u32)5000)
+#define IS31FL3190_CURRENT_DEFAULT ((u32)42000)
+#define IS31FL3190_CURRENT_MAX ((u32)42000)
+#define IS31FL3190_CURRENT_MASK GENMASK(4, 2)
+#define IS31FL3190_CURRENT_5_mA 0x02
+#define IS31FL3190_CURRENT_10_mA 0x01
+#define IS31FL3190_CURRENT_17dot5_mA 0x04
+#define IS31FL3190_CURRENT_30_mA 0x03
+#define IS31FL3190_CURRENT_42_mA 0x00
+
+/* registers for 3196 and 3199 */
#define IS31FL3196_CTRL1 0x01
#define IS31FL3196_CTRL2 0x02
#define IS31FL3196_CONFIG1 0x03
@@ -92,6 +117,37 @@ static bool is31fl319x_readable_reg(struct device *dev, unsigned int reg)
return false;
}
+static bool is31fl3190_volatile_reg(struct device *dev, unsigned int reg)
+{ /* volatile registers are not cached */
+ switch (reg) {
+ case IS31FL3190_DATA_UPDATE:
+ case IS31FL3190_TIME_UPDATE:
+ case IS31FL3190_RESET:
+ return true; /* always write-through */
+ default:
+ return false;
+ }
+}
+
+static const struct reg_default is31fl3190_reg_defaults[] = {
+ { IS31FL3190_LEDMODE, 0x00},
+ { IS31FL3190_CURRENT, 0x00},
+ { IS31FL3190_PWM(0), 0x00},
+ { IS31FL3190_PWM(1), 0x00},
+ { IS31FL3190_PWM(2), 0x00},
+};
+
+static struct regmap_config is31fl3190_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = IS31FL3190_RESET,
+ .cache_type = REGCACHE_FLAT,
+ .readable_reg = is31fl319x_readable_reg,
+ .volatile_reg = is31fl3190_volatile_reg,
+ .reg_defaults = is31fl3190_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(is31fl3190_reg_defaults),
+};
+
static bool is31fl3196_volatile_reg(struct device *dev, unsigned int reg)
{ /* volatile registers are not cached */
switch (reg) {
@@ -129,6 +185,63 @@ static struct regmap_config is31fl3196_regmap_config = {
.num_reg_defaults = ARRAY_SIZE(is31fl3196_reg_defaults),
};
+static int is31fl3190_brightness_set(struct led_classdev *cdev,
+ enum led_brightness brightness)
+{
+ struct is31fl319x_led *led = container_of(cdev, struct is31fl319x_led,
+ cdev);
+ struct is31fl319x_chip *is31 = led->chip;
+ int chan = led - is31->leds;
+ int ret;
+ int i;
+ u8 ctrl = 0;
+
+ dev_dbg(&is31->client->dev, "%s %d: %d\n", __func__, chan, brightness);
+
+ mutex_lock(&is31->lock);
+
+ /* update PWM register */
+ ret = regmap_write(is31->regmap, IS31FL3190_PWM(chan), brightness);
+ if (ret < 0)
+ goto out;
+
+ /* read current brightness of all PWM channels */
+ for (i = 0; i < is31->cdef->num_leds; i++) {
+ unsigned int pwm_value;
+ bool on;
+
+ /*
+ * since neither cdev nor the chip can provide
+ * the current setting, we read from the regmap cache
+ */
+
+ ret = regmap_read(is31->regmap, IS31FL3190_PWM(i), &pwm_value);
+ dev_dbg(&is31->client->dev, "%s read %d: ret=%d: %d\n",
+ __func__, i, ret, pwm_value);
+ on = ret >= 0 && pwm_value > LED_OFF;
+
+ ctrl |= on << i;
+ }
+
+ if (ctrl > 0) {
+ dev_dbg(&is31->client->dev, "power up %02x\n", ctrl);
+ regmap_write(is31->regmap, IS31FL3190_LEDCONTROL, ctrl);
+ /* update PWMs */
+ regmap_write(is31->regmap, IS31FL3190_DATA_UPDATE, 0x00);
+ /* enable chip from shut down and enable all channels */
+ ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x20);
+ } else {
+ dev_dbg(&is31->client->dev, "power down\n");
+ /* shut down (no need to clear LEDCONTROL) */
+ ret = regmap_write(is31->regmap, IS31FL319X_SHUTDOWN, 0x01);
+ }
+
+out:
+ mutex_unlock(&is31->lock);
+
+ return ret;
+}
+
static int is31fl3196_brightness_set(struct led_classdev *cdev,
enum led_brightness brightness)
{
@@ -195,24 +308,24 @@ static int is31fl3196_brightness_set(struct led_classdev *cdev,
static const struct is31fl319x_chipdef is31fl3190_cdef = {
.num_leds = 1,
- .reset_reg = IS31FL3196_RESET,
- .is31fl319x_regmap_config = &is31fl3196_regmap_config,
- .brightness_set = is31fl3196_brightness_set,
- .current_default = IS31FL3196_CURRENT_DEFAULT,
- .current_min = IS31FL3196_CURRENT_MIN,
- .current_max = IS31FL3196_CURRENT_MAX,
- .is_3196or3199 = true,
+ .reset_reg = IS31FL3190_RESET,
+ .is31fl319x_regmap_config = &is31fl3190_regmap_config,
+ .brightness_set = is31fl3190_brightness_set,
+ .current_default = IS31FL3190_CURRENT_DEFAULT,
+ .current_min = IS31FL3190_CURRENT_MIN,
+ .current_max = IS31FL3190_CURRENT_MAX,
+ .is_3196or3199 = false,
};
static const struct is31fl319x_chipdef is31fl3193_cdef = {
.num_leds = 3,
- .reset_reg = IS31FL3196_RESET,
- .is31fl319x_regmap_config = &is31fl3196_regmap_config,
- .brightness_set = is31fl3196_brightness_set,
- .current_default = IS31FL3196_CURRENT_DEFAULT,
- .current_min = IS31FL3196_CURRENT_MIN,
- .current_max = IS31FL3196_CURRENT_MAX,
- .is_3196or3199 = true,
+ .reset_reg = IS31FL3190_RESET,
+ .is31fl319x_regmap_config = &is31fl3190_regmap_config,
+ .brightness_set = is31fl3190_brightness_set,
+ .current_default = IS31FL3190_CURRENT_DEFAULT,
+ .current_min = IS31FL3190_CURRENT_MIN,
+ .current_max = IS31FL3190_CURRENT_MAX,
+ .is_3196or3199 = false,
};
static const struct is31fl319x_chipdef is31fl3196_cdef = {
@@ -360,6 +473,26 @@ static int is31fl319x_parse_dt(struct device *dev,
return ret;
}
+static inline int is31fl3190_microamp_to_cs(struct device *dev, u32 microamp)
+{
+ switch (microamp) {
+ case 5000:
+ return IS31FL3190_CURRENT_5_mA;
+ case 10000:
+ return IS31FL3190_CURRENT_10_mA;
+ case 17500:
+ return IS31FL3190_CURRENT_17dot5_mA;
+ case 30000:
+ return IS31FL3190_CURRENT_30_mA;
+ case 42000:
+ return IS31FL3190_CURRENT_42_mA;
+ default:
+ dev_warn(dev, "Unsupported current value: %d, using 5000 µA!\n", microamp);
+ }
+
+ return IS31FL3190_CURRENT_5_mA;
+}
+
static inline int is31fl3196_microamp_to_cs(struct device *dev, u32 microamp)
{ /* round down to nearest supported value (range check done by caller) */
u32 step = microamp / IS31FL3196_CURRENT_STEP;
@@ -436,6 +569,9 @@ static int is31fl319x_probe(struct i2c_client *client,
regmap_write(is31->regmap, IS31FL3196_CONFIG2,
is31fl3196_microamp_to_cs(dev, aggregated_led_microamp) |
is31fl3196_db_to_gain(is31->audio_gain_db));
+ else
+ regmap_update_bits(is31->regmap, IS31FL3190_CURRENT, IS31FL3190_CURRENT_MASK,
+ is31fl3190_microamp_to_cs(dev, aggregated_led_microamp));
for (i = 0; i < is31->cdef->num_leds; i++) {
struct is31fl319x_led *led = &is31->leds[i];
--
2.35.3
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