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Date: Mon, 13 Feb 2023 16:58:23 +0100
From: Frieder Schrempf <frieder@...s.de>
To: Liam Girdwood <lgirdwood@...il.com>, linux-kernel@...r.kernel.org,
Mark Brown <broonie@...nel.org>
Cc: Marek Vasut <marex@...x.de>,
Frieder Schrempf <frieder.schrempf@...tron.de>,
Per-Daniel Olsson <perdo@...s.com>,
Rickard x Andersson <rickaran@...s.com>,
Uwe Kleine-König
<u.kleine-koenig@...gutronix.de>
Subject: [PATCH 5/6] regulator: pca9450: Fix control register for LDO5
From: Frieder Schrempf <frieder.schrempf@...tron.de>
For LDO5 we need to be able to check the status of the SD_VSEL input in
order to know which control register is used. Read the status of the
SD_VSEL signal via GPIO and add a get_reg_voltage_sel operation for
LDO5 that returns the register that is currently in use to the core.
Signed-off-by: Frieder Schrempf <frieder.schrempf@...tron.de>
---
drivers/regulator/pca9450-regulator.c | 45 ++++++++++++++++++++++++---
1 file changed, 41 insertions(+), 4 deletions(-)
diff --git a/drivers/regulator/pca9450-regulator.c b/drivers/regulator/pca9450-regulator.c
index 804a22c0e376..a0802c6cb259 100644
--- a/drivers/regulator/pca9450-regulator.c
+++ b/drivers/regulator/pca9450-regulator.c
@@ -5,6 +5,7 @@
*/
#include <linux/err.h>
+#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
@@ -32,6 +33,7 @@ struct pca9450_regulator_desc {
struct pca9450 {
struct device *dev;
struct regmap *regmap;
+ struct gpio_desc *sd_vsel_gpio;
enum pca9450_chip_type type;
unsigned int rcnt;
int irq;
@@ -55,6 +57,16 @@ static const struct regmap_config pca9450_regmap_config = {
.cache_type = REGCACHE_RBTREE,
};
+static unsigned int pca9450_ldo5_get_reg_voltage_sel(struct regulator_dev *rdev)
+{
+ struct pca9450 *pca9450 = rdev_get_drvdata(rdev);
+
+ if (pca9450->sd_vsel_gpio && !gpiod_get_value(pca9450->sd_vsel_gpio))
+ return PCA9450_REG_LDO5CTRL_L;
+
+ return PCA9450_REG_LDO5CTRL_H;
+}
+
/*
* BUCK1/2/3
* BUCK1RAM[1:0] BUCK1 DVS ramp rate setting
@@ -97,6 +109,16 @@ static const struct regulator_ops pca9450_ldo_regulator_ops = {
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
+static const struct regulator_ops pca9450_ldo5_regulator_ops = {
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+ .list_voltage = regulator_list_voltage_linear_range,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .get_reg_voltage_sel = pca9450_ldo5_get_reg_voltage_sel,
+};
+
/*
* BUCK1/2/3
* 0.60 to 2.1875V (12.5mV step)
@@ -438,12 +460,11 @@ static const struct pca9450_regulator_desc pca9450a_regulators[] = {
.of_match = of_match_ptr("LDO5"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO5,
- .ops = &pca9450_ldo_regulator_ops,
+ .ops = &pca9450_ldo5_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo5_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
- .vsel_reg = PCA9450_REG_LDO5CTRL_H,
.vsel_mask = LDO5HOUT_MASK,
.enable_reg = PCA9450_REG_LDO5CTRL_L,
.enable_mask = LDO5H_EN_MASK,
@@ -647,12 +668,11 @@ static const struct pca9450_regulator_desc pca9450bc_regulators[] = {
.of_match = of_match_ptr("LDO5"),
.regulators_node = of_match_ptr("regulators"),
.id = PCA9450_LDO5,
- .ops = &pca9450_ldo_regulator_ops,
+ .ops = &pca9450_ldo5_regulator_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
.linear_ranges = pca9450_ldo5_volts,
.n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
- .vsel_reg = PCA9450_REG_LDO5CTRL_H,
.vsel_mask = LDO5HOUT_MASK,
.enable_reg = PCA9450_REG_LDO5CTRL_L,
.enable_mask = LDO5H_EN_MASK,
@@ -705,6 +725,7 @@ static int pca9450_i2c_probe(struct i2c_client *i2c)
of_device_get_match_data(&i2c->dev);
const struct pca9450_regulator_desc *regulator_desc;
struct regulator_config config = { };
+ struct regulator_dev *ldo5;
struct pca9450 *pca9450;
unsigned int device_id, i;
unsigned int reset_ctrl;
@@ -770,6 +791,7 @@ static int pca9450_i2c_probe(struct i2c_client *i2c)
config.regmap = pca9450->regmap;
config.dev = pca9450->dev;
+ config.driver_data = pca9450;
rdev = devm_regulator_register(pca9450->dev, desc, &config);
if (IS_ERR(rdev)) {
@@ -779,6 +801,9 @@ static int pca9450_i2c_probe(struct i2c_client *i2c)
desc->name, ret);
return ret;
}
+
+ if (!strcmp(desc->name, "ldo5"))
+ ldo5 = rdev;
}
ret = devm_request_threaded_irq(pca9450->dev, pca9450->irq, NULL,
@@ -832,6 +857,18 @@ static int pca9450_i2c_probe(struct i2c_client *i2c)
}
}
+ /*
+ * For LDO5 we need to be able to check the status of the SD_VSEL input in
+ * order to know which control register is used. Most boards connect SD_VSEL
+ * to the VSELECT signal, so we can use the GPIO that is internally routed
+ * to this signal (if SION bit is set in IOMUX).
+ */
+ pca9450->sd_vsel_gpio = gpiod_get_optional(&ldo5->dev, "sd-vsel", GPIOD_IN);
+ if (IS_ERR(pca9450->sd_vsel_gpio)) {
+ dev_err(&i2c->dev, "Failed to get SD_VSEL GPIO\n");
+ return ret;
+ }
+
dev_info(&i2c->dev, "%s probed.\n",
type == PCA9450_TYPE_PCA9450A ? "pca9450a" : "pca9450bc");
--
2.39.1
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