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Subject[PATCH 09/10] regulator: s5m8767: Let core handle GPIO descriptors
Date
Use the gpiod_get_from_of_node() rather than the devm_*
version so that the regulator core can handle the lifecycle
of these descriptors.

Introduce an errorpath so we free any retrieved descriptors
properly.

This patch requires "gpio: Export gpiod_get_from_of_node()"
to be applied first.

Fixes: 9ae5cc75ceaa ("regulator: s5m8767: Pass descriptor instead of GPIO number")
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/regulator/s5m8767.c | 37 ++++++++++++++++++++++++++-----------
1 file changed, 26 insertions(+), 11 deletions(-)

diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
index 219b9afda0cb..2d8f6cd4f142 100644
--- a/drivers/regulator/s5m8767.c
+++ b/drivers/regulator/s5m8767.c
@@ -528,7 +528,7 @@ static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
struct device_node *pmic_np, *regulators_np, *reg_np;
struct sec_regulator_data *rdata;
struct sec_opmode_data *rmode;
- unsigned int i, dvs_voltage_nr = 8, ret;
+ unsigned int i, j, dvs_voltage_nr = 8, ret;

pmic_np = iodev->dev->of_node;
if (!pmic_np) {
@@ -559,6 +559,7 @@ static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,

pdata->regulators = rdata;
pdata->opmode = rmode;
+ j = 0; /* Keeps track of populated elements for errorpath */
for_each_child_of_node(regulators_np, reg_np) {
for (i = 0; i < ARRAY_SIZE(regulators); i++)
if (!of_node_cmp(reg_np->name, regulators[i].name))
@@ -571,9 +572,7 @@ static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
continue;
}

- rdata->ext_control_gpiod = devm_gpiod_get_from_of_node(
- &pdev->dev,
- reg_np,
+ rdata->ext_control_gpiod = gpiod_get_from_of_node(reg_np,
"s5m8767,pmic-ext-control-gpios",
0,
GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE,
@@ -597,6 +596,7 @@ static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
rmode->mode = S5M8767_OPMODE_NORMAL_MODE;
}
rmode++;
+ j++;
}

of_node_put(regulators_np);
@@ -608,7 +608,8 @@ static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
"s5m8767,pmic-buck2-dvs-voltage",
pdata->buck2_voltage, dvs_voltage_nr)) {
dev_err(iodev->dev, "buck2 voltages not specified\n");
- return -EINVAL;
+ ret = -EINVAL;
+ goto err_gpiod_put;
}
}

@@ -619,7 +620,8 @@ static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
"s5m8767,pmic-buck3-dvs-voltage",
pdata->buck3_voltage, dvs_voltage_nr)) {
dev_err(iodev->dev, "buck3 voltages not specified\n");
- return -EINVAL;
+ ret = -EINVAL;
+ goto err_gpiod_put;
}
}

@@ -630,15 +632,18 @@ static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
"s5m8767,pmic-buck4-dvs-voltage",
pdata->buck4_voltage, dvs_voltage_nr)) {
dev_err(iodev->dev, "buck4 voltages not specified\n");
- return -EINVAL;
+ ret = -EINVAL;
+ goto err_gpiod_put;
}
}

if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
pdata->buck4_gpiodvs) {
ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
- if (ret)
- return -EINVAL;
+ if (ret) {
+ ret = -EINVAL;
+ goto err_gpiod_put;
+ }

if (of_property_read_u32(pmic_np,
"s5m8767,pmic-buck-default-dvs-idx",
@@ -654,8 +659,10 @@ static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
}

ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np);
- if (ret)
- return -EINVAL;
+ if (ret) {
+ ret = -EINVAL;
+ goto err_gpiod_put;
+ }

if (of_get_property(pmic_np, "s5m8767,pmic-buck2-ramp-enable", NULL))
pdata->buck2_ramp_enable = true;
@@ -674,6 +681,14 @@ static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
}

return 0;
+
+err_gpiod_put:
+ while (j) {
+ gpiod_put(rdata->ext_control_gpiod);
+ rdata--;
+ j--;
+ }
+ return ret;
}
#else
static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
--
2.19.1
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