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| author | Rasmus Villemoes <linux@rasmusvillemoes.dk> | 2023-06-15 13:58:22 +0300 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2023-08-16 02:27:01 +0300 |
| commit | 2caeb566baabb65add7d99ca6d8bfd566fe91582 (patch) | |
| tree | 213889845c9206bb7cb2fd476880d841d5ae6a2a | |
| parent | 69b569c124ffa698de25d039018fe86313c46c84 (diff) | |
| download | linux-2caeb566baabb65add7d99ca6d8bfd566fe91582.tar.xz | |
rtc: isl12022: add support for trip level DT binding
Implement support for using the values given in the
isil,battery-trip-levels-microvolt property to set appropriate values
in the VB85TP/VB75TP bits in the PWR_VBAT register.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Link: https://lore.kernel.org/r/20230615105826.411953-5-linux@rasmusvillemoes.dk
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
| -rw-r--r-- | drivers/rtc/rtc-isl12022.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-isl12022.c b/drivers/rtc/rtc-isl12022.c index a39aea90230f..a50eed4e4028 100644 --- a/drivers/rtc/rtc-isl12022.c +++ b/drivers/rtc/rtc-isl12022.c @@ -9,6 +9,7 @@ */ #include <linux/bcd.h> +#include <linux/bitfield.h> #include <linux/err.h> #include <linux/hwmon.h> #include <linux/i2c.h> @@ -31,6 +32,8 @@ #define ISL12022_REG_SR 0x07 #define ISL12022_REG_INT 0x08 +#define ISL12022_REG_PWR_VBAT 0x0a + #define ISL12022_REG_BETA 0x0d #define ISL12022_REG_TEMP_L 0x28 @@ -42,6 +45,9 @@ #define ISL12022_INT_WRTC (1 << 6) +#define ISL12022_REG_VB85_MASK GENMASK(5, 3) +#define ISL12022_REG_VB75_MASK GENMASK(2, 0) + #define ISL12022_BETA_TSE (1 << 7) static umode_t isl12022_hwmon_is_visible(const void *data, @@ -209,6 +215,38 @@ static const struct regmap_config regmap_config = { .use_single_write = true, }; +static const u32 trip_levels[2][7] = { + { 2125000, 2295000, 2550000, 2805000, 3060000, 4250000, 4675000 }, + { 1875000, 2025000, 2250000, 2475000, 2700000, 3750000, 4125000 }, +}; + +static void isl12022_set_trip_levels(struct device *dev) +{ + struct regmap *regmap = dev_get_drvdata(dev); + u32 levels[2] = {0, 0}; + int ret, i, j, x[2]; + u8 val, mask; + + device_property_read_u32_array(dev, "isil,battery-trip-levels-microvolt", + levels, 2); + + for (i = 0; i < 2; i++) { + for (j = 0; j < ARRAY_SIZE(trip_levels[i]) - 1; j++) { + if (levels[i] <= trip_levels[i][j]) + break; + } + x[i] = j; + } + + val = FIELD_PREP(ISL12022_REG_VB85_MASK, x[0]) | + FIELD_PREP(ISL12022_REG_VB75_MASK, x[1]); + mask = ISL12022_REG_VB85_MASK | ISL12022_REG_VB75_MASK; + + ret = regmap_update_bits(regmap, ISL12022_REG_PWR_VBAT, mask, val); + if (ret) + dev_warn(dev, "unable to set battery alarm levels: %d\n", ret); +} + static int isl12022_probe(struct i2c_client *client) { struct rtc_device *rtc; @@ -225,6 +263,7 @@ static int isl12022_probe(struct i2c_client *client) dev_set_drvdata(&client->dev, regmap); + isl12022_set_trip_levels(&client->dev); isl12022_hwmon_register(&client->dev); rtc = devm_rtc_allocate_device(&client->dev); |