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Date: Tue, 28 Jul 2020 23:24:48 +0800
From: Jisheng Zhang <jszhang3@...l.ustc.edu.cn>
To: Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Saravanan Sekar <sravanhome@...il.com>
Cc: linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: [PATCH 2/4] regulator: mp886x: implement set_ramp_delay
From: Jisheng Zhang <Jisheng.Zhang@...aptics.com>
Implement the .set_ramp_delay for MP8867 and MP8869. MP8867 and MP8869
could share the implementation, the only difference is the slew_rates
array.
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@...aptics.com>
---
drivers/regulator/mp886x.c | 67 ++++++++++++++++++++++++++++++++++++--
1 file changed, 64 insertions(+), 3 deletions(-)
diff --git a/drivers/regulator/mp886x.c b/drivers/regulator/mp886x.c
index 1786f7162019..3c9a6605b115 100644
--- a/drivers/regulator/mp886x.c
+++ b/drivers/regulator/mp886x.c
@@ -18,18 +18,48 @@
#define MP886X_V_BOOT (1 << 7)
#define MP886X_SYSCNTLREG1 0x01
#define MP886X_MODE (1 << 0)
+#define MP886X_SLEW_SHIFT 3
+#define MP886X_SLEW_MASK (0x7 << MP886X_SLEW_SHIFT)
#define MP886X_GO (1 << 6)
#define MP886X_EN (1 << 7)
+struct mp886x_cfg_info {
+ const struct regulator_ops *rops;
+ const int slew_rates[8];
+};
+
struct mp886x_device_info {
struct device *dev;
struct regulator_desc desc;
struct regulator_init_data *regulator;
struct gpio_desc *en_gpio;
+ const struct mp886x_cfg_info *ci;
u32 r[2];
unsigned int sel;
};
+static int mp886x_set_ramp(struct regulator_dev *rdev, int ramp)
+{
+ struct mp886x_device_info *di = rdev_get_drvdata(rdev);
+ const struct mp886x_cfg_info *ci = di->ci;
+ int reg = -1, i;
+
+ for (i = 0; i < ARRAY_SIZE(ci->slew_rates); i++) {
+ if (ramp <= ci->slew_rates[i])
+ reg = i;
+ else
+ break;
+ }
+
+ if (reg < 0) {
+ dev_err(di->dev, "unsupported ramp value %d\n", ramp);
+ return -EINVAL;
+ }
+
+ return regmap_update_bits(rdev->regmap, MP886X_SYSCNTLREG1,
+ MP886X_SLEW_MASK, reg << MP886X_SLEW_SHIFT);
+}
+
static int mp886x_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
switch (mode) {
@@ -117,6 +147,21 @@ static const struct regulator_ops mp8869_regulator_ops = {
.is_enabled = regulator_is_enabled_regmap,
.set_mode = mp886x_set_mode,
.get_mode = mp886x_get_mode,
+ .set_ramp_delay = mp886x_set_ramp,
+};
+
+static const struct mp886x_cfg_info mp8869_ci = {
+ .rops = &mp8869_regulator_ops,
+ .slew_rates = {
+ 40000,
+ 30000,
+ 20000,
+ 10000,
+ 5000,
+ 2500,
+ 1250,
+ 625,
+ },
};
static int mp8867_set_voltage_sel(struct regulator_dev *rdev, unsigned int sel)
@@ -173,6 +218,21 @@ static const struct regulator_ops mp8867_regulator_ops = {
.is_enabled = regulator_is_enabled_regmap,
.set_mode = mp886x_set_mode,
.get_mode = mp886x_get_mode,
+ .set_ramp_delay = mp886x_set_ramp,
+};
+
+static const struct mp886x_cfg_info mp8867_ci = {
+ .rops = &mp8867_regulator_ops,
+ .slew_rates = {
+ 64000,
+ 32000,
+ 16000,
+ 8000,
+ 4000,
+ 2000,
+ 1000,
+ 500,
+ },
};
static int mp886x_regulator_register(struct mp886x_device_info *di,
@@ -183,7 +243,7 @@ static int mp886x_regulator_register(struct mp886x_device_info *di,
rdesc->name = "mp886x-reg";
rdesc->supply_name = "vin";
- rdesc->ops = of_device_get_match_data(di->dev);
+ rdesc->ops = di->ci->rops;
rdesc->type = REGULATOR_VOLTAGE;
rdesc->n_voltages = 128;
rdesc->enable_reg = MP886X_SYSCNTLREG1;
@@ -235,6 +295,7 @@ static int mp886x_i2c_probe(struct i2c_client *client,
if (IS_ERR(di->en_gpio))
return PTR_ERR(di->en_gpio);
+ di->ci = of_device_get_match_data(dev);
di->dev = dev;
regmap = devm_regmap_init_i2c(client, &mp886x_regmap_config);
@@ -259,11 +320,11 @@ static int mp886x_i2c_probe(struct i2c_client *client,
static const struct of_device_id mp886x_dt_ids[] = {
{
.compatible = "mps,mp8867",
- .data = &mp8867_regulator_ops
+ .data = &mp8867_ci
},
{
.compatible = "mps,mp8869",
- .data = &mp8869_regulator_ops
+ .data = &mp8869_ci
},
{ }
};
--
2.28.0.rc0
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