[PATCH v3 40/44] staging: regulator: hi6421v600-regulator: code cleanup

Mauro Carvalho Chehab
2020-08-17T07:13:03Z

Do some code cleanup in order to make it cleaner for moving
it out of staging in the future.

Suggested-by: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
.../staging/hikey9xx/hi6421v600-regulator.c | 80 ++++++++-----------
1 file changed, 33 insertions(+), 47 deletions(-)

diff --git a/drivers/staging/hikey9xx/hi6421v600-regulator.c b/drivers/staging/hikey9xx/hi6421v600-regulator.c
index c80dfac1e4c3..82635ff54a74 100644
--- a/drivers/staging/hikey9xx/hi6421v600-regulator.c
+++ b/drivers/staging/hikey9xx/hi6421v600-regulator.c
@@ -15,29 +15,28 @@
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
- *
*/

-#include <linux/slab.h>
+#include <linux/delay.h>
#include <linux/device.h>
-#include <linux/module.h>
#include <linux/err.h>
#include <linux/io.h>
-#include <linux/platform_device.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
+#include <linux/mfd/hi6421-spmi-pmic.h>
+#include <linux/module.h>
#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>
-#include <linux/mfd/hi6421-spmi-pmic.h>
-#include <linux/delay.h>
-#include <linux/time.h>
-#include <linux/version.h>
#include <linux/seq_file.h>
-#include <linux/uaccess.h>
+#include <linux/slab.h>
#include <linux/spmi.h>
+#include <linux/time.h>
+#include <linux/uaccess.h>
+#include <linux/version.h>

#define rdev_dbg(rdev, fmt, arg...) \
pr_debug("%s: %s: " fmt, (rdev)->desc->name, __func__, ##arg)
@@ -50,15 +49,16 @@ struct hi6421v600_regulator {

static DEFINE_MUTEX(enable_mutex);

-/* helper function to ensure when it returns it is at least 'delay_us'
+/*
+ * helper function to ensure when it returns it is at least 'delay_us'
* microseconds after 'since'.
*/

static int hi6421_spmi_regulator_is_enabled(struct regulator_dev *rdev)
{
- u32 reg_val;
struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
struct hi6421_spmi_pmic *pmic = sreg->pmic;
+ u32 reg_val;

reg_val = hi6421_spmi_pmic_read(pmic, rdev->desc->enable_reg);

@@ -136,7 +136,6 @@ static int hi6421_spmi_regulator_set_voltage_sel(struct regulator_dev *rdev,
struct hi6421_spmi_pmic *pmic = sreg->pmic;
u32 reg_val;

- /* unlikely to happen. sanity test done by regulator core */
if (unlikely(selector >= rdev->desc->n_voltages))
return -EINVAL;

@@ -158,8 +157,8 @@ static unsigned int hi6421_spmi_regulator_get_mode(struct regulator_dev *rdev)
{
struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
struct hi6421_spmi_pmic *pmic = sreg->pmic;
- u32 reg_val;
unsigned int mode;
+ u32 reg_val;

reg_val = hi6421_spmi_pmic_read(pmic, rdev->desc->enable_reg);

@@ -211,13 +210,10 @@ hi6421_spmi_regulator_get_optimum_mode(struct regulator_dev *rdev,
{
struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);

- if (load_uA || ((unsigned int)load_uA > sreg->eco_uA)) {
- rdev_dbg(rdev, "normal mode");
+ if (load_uA || ((unsigned int)load_uA > sreg->eco_uA))
return REGULATOR_MODE_NORMAL;
- } else {
- rdev_dbg(rdev, "idle mode");
- return REGULATOR_MODE_IDLE;
- }
+
+ return REGULATOR_MODE_IDLE;
}

static int hi6421_spmi_dt_parse(struct platform_device *pdev,
@@ -231,7 +227,7 @@ static int hi6421_spmi_dt_parse(struct platform_device *pdev,

ret = of_property_read_u32(np, "reg", &rdesc->enable_reg);
if (ret) {
- dev_err(dev, "missing reg property\nn");
+ dev_err(dev, "missing reg property\n");
return ret;
}

@@ -256,8 +252,7 @@ static int hi6421_spmi_dt_parse(struct platform_device *pdev,
sreg->eco_mode_mask = 0;
sreg->eco_uA = 0;
} else {
- ret = of_property_read_u32(np, "eco-microamp",
- &sreg->eco_uA);
+ ret = of_property_read_u32(np, "eco-microamp", &sreg->eco_uA);
if (ret) {
dev_err(dev, "missing eco-microamp property\n");
return ret;
@@ -308,13 +303,13 @@ static int hi6421_spmi_dt_parse(struct platform_device *pdev,
*/
rdesc->vsel_mask = (1 << (fls(rdesc->n_voltages) - 1)) - 1;

- dev_dbg(dev, "voltage selector settings: reg: 0x%x, mask: 0x%x",
+ dev_dbg(dev, "voltage selector settings: reg: 0x%x, mask: 0x%x\n",
rdesc->vsel_reg, rdesc->vsel_mask);

return 0;
}

-static struct regulator_ops hi6421_spmi_ldo_rops = {
+static const struct regulator_ops hi6421_spmi_ldo_rops = {
.is_enabled = hi6421_spmi_regulator_is_enabled,
.enable = hi6421_spmi_regulator_enable,
.disable = hi6421_spmi_regulator_disable,
@@ -327,23 +322,19 @@ static struct regulator_ops hi6421_spmi_ldo_rops = {
.get_optimum_mode = hi6421_spmi_regulator_get_optimum_mode,
};

-/*
- * Used only for parsing the DT properties
- */
-
static int hi6421_spmi_regulator_probe_ldo(struct platform_device *pdev,
struct device_node *np,
struct hi6421_spmi_pmic *pmic)
{
- struct device *dev = &pdev->dev;
- struct regulator_desc *rdesc;
- struct regulator_dev *rdev;
- struct hi6421v600_regulator *sreg = NULL;
+ struct regulation_constraints *constraint;
struct regulator_init_data *initdata;
struct regulator_config config = { };
- struct regulation_constraints *constraint;
- const char *supplyname = NULL;
- int ret = 0;
+ struct hi6421v600_regulator *sreg;
+ struct device *dev = &pdev->dev;
+ struct regulator_desc *rdesc;
+ struct regulator_dev *rdev;
+ const char *supplyname;
+ int ret;

initdata = of_get_regulator_init_data(dev, np, NULL);
if (!initdata) {
@@ -351,7 +342,7 @@ static int hi6421_spmi_regulator_probe_ldo(struct platform_device *pdev,
return -EINVAL;
}

- sreg = kzalloc(sizeof(*sreg), GFP_KERNEL);
+ sreg = devm_kzalloc(dev, sizeof(*sreg), GFP_KERNEL);
if (!sreg)
return -ENOMEM;

@@ -370,7 +361,7 @@ static int hi6421_spmi_regulator_probe_ldo(struct platform_device *pdev,
/* parse device tree data for regulator specific */
ret = hi6421_spmi_dt_parse(pdev, sreg, rdesc);
if (ret)
- goto probe_end;
+ return ret;

/* hisi regulator supports two modes */
constraint = &initdata->constraints;
@@ -391,18 +382,15 @@ static int hi6421_spmi_regulator_probe_ldo(struct platform_device *pdev,
if (IS_ERR(rdev)) {
dev_err(dev, "failed to register %s\n",
rdesc->name);
- ret = PTR_ERR(rdev);
- goto probe_end;
+ return PTR_ERR(rdev);
}

rdev_dbg(rdev, "valid_modes_mask: 0x%x, valid_ops_mask: 0x%x\n",
constraint->valid_modes_mask, constraint->valid_ops_mask);

dev_set_drvdata(dev, rdev);
-probe_end:
- if (ret)
- kfree(sreg);
- return ret;
+
+ return 0;
}

static int hi6421_spmi_regulator_probe(struct platform_device *pdev)
@@ -414,7 +402,6 @@ static int hi6421_spmi_regulator_probe(struct platform_device *pdev)
struct hi6421_spmi_pmic *pmic;
int ret;

- dev_dbg(&pdev->dev, "probing hi6421v600 regulator\n");
/*
* This driver is meant to be called by hi6421-spmi-core,
* which should first set drvdata. If this doesn't happen, hit
@@ -463,7 +450,6 @@ static int hi6421_spmi_regulator_remove(struct platform_device *pdev)

regulator_unregister(rdev);

- /* TODO: should i worry about that? devm_kzalloc */
if (rdev->desc->volt_table)
devm_kfree(&pdev->dev, (unsigned int *)rdev->desc->volt_table);

--
2.26.2