[PATCH v2 04/13] staging: hikey9xx: hi6421v600-regulator: move LDO config from DT

Mauro Carvalho Chehab
2021-01-18T13:36:09Z

Instead of storing regulator LDO configuration inside the DT, move
it to be part of the driver itself.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
.../staging/hikey9xx/hi6421v600-regulator.c | 380 +++++++-----------
1 file changed, 152 insertions(+), 228 deletions(-)

diff --git a/drivers/staging/hikey9xx/hi6421v600-regulator.c b/drivers/staging/hikey9xx/hi6421v600-regulator.c
index 4ee0444b2b4e..a9d83c99d2d4 100644
--- a/drivers/staging/hikey9xx/hi6421v600-regulator.c
+++ b/drivers/staging/hikey9xx/hi6421v600-regulator.c
@@ -16,35 +16,97 @@
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.

+#include <linux/delay.h>
#include <linux/mfd/hi6421-spmi-pmic.h>
#include <linux/module.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/spmi.h>

#define rdev_dbg(rdev, fmt, arg...) \
pr_debug("%s: %s: " fmt, (rdev)->desc->name, __func__, ##arg)

-struct hi6421v600_regulator {
- struct regulator_desc rdesc;
+struct hi6421_spmi_reg_info {
+ struct regulator_desc desc;
struct hi6421_spmi_pmic *pmic;
- u32 eco_mode_mask, eco_uA;
+ u8 eco_mode_mask;
+ u32 eco_uA;
};

static DEFINE_MUTEX(enable_mutex);

+static const unsigned int ldo3_voltages[] = {
+ 1500000, 1550000, 1600000, 1650000,
+ 1700000, 1725000, 1750000, 1775000,
+ 1800000, 1825000, 1850000, 1875000,
+ 1900000, 1925000, 1950000, 2000000
+};
+
+static const unsigned int ldo4_voltages[] = {
+ 1725000, 1750000, 1775000, 1800000,
+ 1825000, 1850000, 1875000, 1900000
+};
+
+static const unsigned int ldo9_voltages[] = {
+ 1750000, 1800000, 1825000, 2800000,
+ 2850000, 2950000, 3000000, 3300000
+};
+
+static const unsigned int ldo15_voltages[] = {
+ 1800000, 1850000, 2400000, 2600000,
+ 2700000, 2850000, 2950000, 3000000
+};
+
+static const unsigned int ldo17_voltages[] = {
+ 2500000, 2600000, 2700000, 2800000,
+ 3000000, 3100000, 3200000, 3300000
+};
+
+static const unsigned int ldo34_voltages[] = {
+ 2600000, 2700000, 2800000, 2900000,
+ 3000000, 3100000, 3200000, 3300000
+};
+
/*
- * helper function to ensure when it returns it is at least 'delay_us'
- * microseconds after 'since'.
+ * _id - LDO id name string
+ * _match - of match name string
+ * v_table - voltage table
+ * vreg - voltage select register
+ * vmask - voltage select mask
+ * ereg - enable register
+ * emask - enable mask
+ * odelay - off/on delay time in uS
+ * ecomask - eco mode mask
+ * ecoamp - eco mode load uppler limit in uA
*/
+#define HI6421V600_LDO(_id, vtable, ereg, emask, vreg, \
+ odelay, etime, ecomask, ecoamp) \
+ [HI6421V600_##_id] = { \
+ .desc = { \
+ .name = #_id, \
+ .of_match = of_match_ptr(#_id), \
+ .regulators_node = of_match_ptr("regulators"), \
+ .ops = &hi6421_spmi_ldo_rops, \
+ .type = REGULATOR_VOLTAGE, \
+ .id = HI6421V600_##_id, \
+ .owner = THIS_MODULE, \
+ .volt_table = vtable, \
+ .n_voltages = ARRAY_SIZE(vtable), \
+ .vsel_mask = (1 << (ARRAY_SIZE(vtable) - 1)) - 1, \
+ .vsel_reg = vreg, \
+ .enable_reg = ereg, \
+ .enable_mask = emask, \
+ .enable_time = etime, \
+ .ramp_delay = etime, \
+ .off_on_delay = odelay, \
+ }, \
+ .eco_mode_mask = ecomask, \
+ .eco_uA = ecoamp, \
+ }

static int hi6421_spmi_regulator_is_enabled(struct regulator_dev *rdev)
{
- struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
+ struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
struct hi6421_spmi_pmic *pmic = sreg->pmic;
u32 reg_val;

@@ -60,7 +122,7 @@ static int hi6421_spmi_regulator_is_enabled(struct regulator_dev *rdev)

static int hi6421_spmi_regulator_enable(struct regulator_dev *rdev)
{
- struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
+ struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
struct hi6421_spmi_pmic *pmic = sreg->pmic;

/* cannot enable more than one regulator at one time */
@@ -85,7 +147,7 @@ static int hi6421_spmi_regulator_enable(struct regulator_dev *rdev)

static int hi6421_spmi_regulator_disable(struct regulator_dev *rdev)
{
- struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
+ struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
struct hi6421_spmi_pmic *pmic = sreg->pmic;

/* set enable register to 0 */
@@ -100,7 +162,7 @@ static int hi6421_spmi_regulator_disable(struct regulator_dev *rdev)

static int hi6421_spmi_regulator_get_voltage_sel(struct regulator_dev *rdev)
{
- struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
+ struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
struct hi6421_spmi_pmic *pmic = sreg->pmic;
u32 reg_val, selector;

@@ -120,7 +182,7 @@ static int hi6421_spmi_regulator_get_voltage_sel(struct regulator_dev *rdev)
static int hi6421_spmi_regulator_set_voltage_sel(struct regulator_dev *rdev,
unsigned int selector)
{
- struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
+ struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
struct hi6421_spmi_pmic *pmic = sreg->pmic;
u32 reg_val;

@@ -143,7 +205,7 @@ static int hi6421_spmi_regulator_set_voltage_sel(struct regulator_dev *rdev,

static unsigned int hi6421_spmi_regulator_get_mode(struct regulator_dev *rdev)
{
- struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
+ struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
struct hi6421_spmi_pmic *pmic = sreg->pmic;
unsigned int mode;
u32 reg_val;
@@ -166,7 +228,7 @@ static unsigned int hi6421_spmi_regulator_get_mode(struct regulator_dev *rdev)
static int hi6421_spmi_regulator_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
- struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
+ struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);
struct hi6421_spmi_pmic *pmic = sreg->pmic;
u32 val;

@@ -196,7 +258,7 @@ hi6421_spmi_regulator_get_optimum_mode(struct regulator_dev *rdev,
int input_uV, int output_uV,
int load_uA)
{
- struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
+ struct hi6421_spmi_reg_info *sreg = rdev_get_drvdata(rdev);

if (load_uA || ((unsigned int)load_uA > sreg->eco_uA))
return REGULATOR_MODE_NORMAL;
@@ -204,99 +266,6 @@ hi6421_spmi_regulator_get_optimum_mode(struct regulator_dev *rdev,
return REGULATOR_MODE_IDLE;
}

-static int hi6421_spmi_dt_parse(struct platform_device *pdev,
- struct hi6421v600_regulator *sreg,
- struct regulator_desc *rdesc)
-{
- struct device *dev = &pdev->dev;
- struct device_node *np = dev->of_node;
- unsigned int *v_table;
- int ret;
-
- ret = of_property_read_u32(np, "reg", &rdesc->enable_reg);
- if (ret) {
- dev_err(dev, "missing reg property\n");
- return ret;
- }
-
- ret = of_property_read_u32(np, "vsel-reg", &rdesc->vsel_reg);
- if (ret) {
- dev_err(dev, "missing vsel-reg property\n");
- return ret;
- }
-
- ret = of_property_read_u32(np, "enable-mask", &rdesc->enable_mask);
- if (ret) {
- dev_err(dev, "missing enable-mask property\n");
- return ret;
- }
-
- /*
- * Not all regulators work on idle mode
- */
- ret = of_property_read_u32(np, "idle-mode-mask", &sreg->eco_mode_mask);
- if (ret) {
- dev_dbg(dev, "LDO doesn't support economy mode.\n");
- sreg->eco_mode_mask = 0;
- sreg->eco_uA = 0;
- } else {
- ret = of_property_read_u32(np, "eco-microamp", &sreg->eco_uA);
- if (ret) {
- dev_err(dev, "missing eco-microamp property\n");
- return ret;
- }
- }
-
- /* parse .off-on-delay */
- ret = of_property_read_u32(np, "off-on-delay-us",
- &rdesc->off_on_delay);
- if (ret) {
- dev_err(dev, "missing off-on-delay-us property\n");
- return ret;
- }
-
- /* parse .enable_time */
- ret = of_property_read_u32(np, "startup-delay-us",
- &rdesc->enable_time);
- if (ret) {
- dev_err(dev, "missing startup-delay-us property\n");
- return ret;
- }
-
- /* FIXME: are there a better value for this? */
- rdesc->ramp_delay = rdesc->enable_time;
-
- /* parse volt_table */
-
- rdesc->n_voltages = of_property_count_u32_elems(np, "voltage-table");
-
- v_table = devm_kzalloc(dev, sizeof(unsigned int) * rdesc->n_voltages,
- GFP_KERNEL);
- if (unlikely(!v_table))
- return -ENOMEM;
- rdesc->volt_table = v_table;
-
- ret = of_property_read_u32_array(np, "voltage-table",
- v_table, rdesc->n_voltages);
- if (ret) {
- dev_err(dev, "missing voltage-table property\n");
- return ret;
- }
-
- /*
- * Instead of explicitly requiring a mask for the voltage selector,
- * as they all start from bit zero (at least on the known LDOs),
- * just use the number of voltages at the voltage table, getting the
- * minimal mask that would pick everything.
- */
- rdesc->vsel_mask = (1 << (fls(rdesc->n_voltages) - 1)) - 1;
-
- dev_dbg(dev, "voltage selector settings: reg: 0x%x, mask: 0x%x\n",
- rdesc->vsel_reg, rdesc->vsel_mask);
-
- return 0;
-}
-
static const struct regulator_ops hi6421_spmi_ldo_rops = {
.is_enabled = hi6421_spmi_regulator_is_enabled,
.enable = hi6421_spmi_regulator_enable,
@@ -310,85 +279,63 @@ static const struct regulator_ops hi6421_spmi_ldo_rops = {
.get_optimum_mode = hi6421_spmi_regulator_get_optimum_mode,
};

-static int hi6421_spmi_regulator_probe_ldo(struct platform_device *pdev,
- struct device_node *np,
- struct hi6421_spmi_pmic *pmic)
-{
- struct regulation_constraints *constraint;
- struct regulator_init_data *initdata;
- struct regulator_config config = { };
- 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) {
- dev_err(dev, "failed to get regulator data\n");
- return -EINVAL;
- }
-
- sreg = devm_kzalloc(dev, sizeof(*sreg), GFP_KERNEL);
- if (!sreg)
- return -ENOMEM;
-
- sreg->pmic = pmic;
- rdesc = &sreg->rdesc;
-
- rdesc->name = initdata->constraints.name;
- rdesc->ops = &hi6421_spmi_ldo_rops;
- rdesc->type = REGULATOR_VOLTAGE;
- rdesc->min_uV = initdata->constraints.min_uV;
-
- supplyname = of_get_property(np, "supply_name", NULL);
- if (supplyname)
- initdata->supply_regulator = supplyname;
-
- /* parse device tree data for regulator specific */
- ret = hi6421_spmi_dt_parse(pdev, sreg, rdesc);
- if (ret)
- return ret;
-
- /* hisi regulator supports two modes */
- constraint = &initdata->constraints;
-
- constraint->valid_modes_mask = REGULATOR_MODE_NORMAL;
- if (sreg->eco_mode_mask) {
- constraint->valid_modes_mask |= REGULATOR_MODE_IDLE;
- constraint->valid_ops_mask |= REGULATOR_CHANGE_MODE;
- }
-
- config.dev = &pdev->dev;
- config.init_data = initdata;
- config.driver_data = sreg;
- config.of_node = pdev->dev.of_node;
-
- /* register regulator */
- rdev = regulator_register(rdesc, &config);
- if (IS_ERR(rdev)) {
- dev_err(dev, "failed to register %s\n",
- rdesc->name);
- 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);
-
- return 0;
-}
+/* HI6421v600 regulators with known registers */
+enum hi6421_spmi_regulator_id {
+ HI6421V600_LDO3,
+ HI6421V600_LDO4,
+ HI6421V600_LDO9,
+ HI6421V600_LDO15,
+ HI6421V600_LDO16,
+ HI6421V600_LDO17,
+ HI6421V600_LDO33,
+ HI6421V600_LDO34,
+};
+
+static struct hi6421_spmi_reg_info regulator_info[] = {
+ HI6421V600_LDO(LDO3, ldo3_voltages,
+ 0x16, 0x01, 0x51,
+ 20000, 120,
+ 0, 0),
+ HI6421V600_LDO(LDO4, ldo4_voltages,
+ 0x17, 0x01, 0x52,
+ 20000, 120,
+ 0x10, 10000),
+ HI6421V600_LDO(LDO9, ldo9_voltages,
+ 0x1c, 0x01, 0x57,
+ 20000, 360,
+ 0x10, 10000),
+ HI6421V600_LDO(LDO15, ldo15_voltages,
+ 0x21, 0x01, 0x5c,
+ 20000, 360,
+ 0x10, 10000),
+ HI6421V600_LDO(LDO16, ldo15_voltages,
+ 0x22, 0x01, 0x5d,
+ 20000, 360,
+ 0x10, 10000),
+ HI6421V600_LDO(LDO17, ldo17_voltages,
+ 0x23, 0x01, 0x5e,
+ 20000, 120,
+ 0x10, 10000),
+ HI6421V600_LDO(LDO33, ldo17_voltages,
+ 0x32, 0x01, 0x6d,
+ 20000, 120,
+ 0, 0),
+ HI6421V600_LDO(LDO34, ldo34_voltages,
+ 0x33, 0x01, 0x6e,
+ 20000, 120,
+ 0, 0),
+};

static int hi6421_spmi_regulator_probe(struct platform_device *pdev)
{
struct device *pmic_dev = pdev->dev.parent;
- struct device_node *np = pmic_dev->of_node;
- struct device_node *regulators, *child;
- struct platform_device *new_pdev;
+ struct regulator_config config = { };
+ struct hi6421_spmi_reg_info *sreg;
+ struct hi6421_spmi_reg_info *info;
+ struct device *dev = &pdev->dev;
struct hi6421_spmi_pmic *pmic;
- int ret;
+ struct regulator_dev *rdev;
+ int i;

/*
* This driver is meant to be called by hi6421-spmi-core,
@@ -399,68 +346,45 @@ static int hi6421_spmi_regulator_probe(struct platform_device *pdev)
if (WARN_ON(!pmic))
return -ENODEV;

- regulators = of_get_child_by_name(np, "regulators");
- if (!regulators) {
- dev_err(&pdev->dev, "regulator node not found\n");
- return -ENODEV;
- }
+ sreg = devm_kzalloc(dev, sizeof(*sreg), GFP_KERNEL);
+ if (!sreg)
+ return -ENOMEM;

- /*
- * Parse all LDO regulator nodes
- */
- for_each_child_of_node(regulators, child) {
- dev_dbg(&pdev->dev, "adding child %pOF\n", child);
+ sreg->pmic = pmic;

- new_pdev = platform_device_alloc(child->name, -1);
- new_pdev->dev.parent = pmic_dev;
- new_pdev->dev.of_node = of_node_get(child);
+ for (i = 0; i < ARRAY_SIZE(regulator_info); i++) {
+ /* assign per-regulator data */
+ info = &regulator_info[i];

- ret = platform_device_add(new_pdev);
- if (ret < 0) {
- platform_device_put(new_pdev);
- continue;
+ dev_dbg(dev, "adding regulator %s\n", info->desc.name);
+
+ config.dev = pdev->dev.parent;
+ config.driver_data = sreg;
+
+ rdev = devm_regulator_register(dev, &info->desc, &config);
+ if (IS_ERR(rdev)) {
+ dev_err(dev, "failed to register %s\n", sreg->desc.name);
+ return PTR_ERR(rdev);
}
-
- ret = hi6421_spmi_regulator_probe_ldo(new_pdev, child, pmic);
- if (ret < 0)
- platform_device_put(new_pdev);
}

- of_node_put(regulators);
-
- return 0;
-}
-
-static int hi6421_spmi_regulator_remove(struct platform_device *pdev)
-{
- struct regulator_dev *rdev = dev_get_drvdata(&pdev->dev);
- struct hi6421v600_regulator *sreg = rdev_get_drvdata(rdev);
-
- regulator_unregister(rdev);
-
- if (rdev->desc->volt_table)
- devm_kfree(&pdev->dev, (unsigned int *)rdev->desc->volt_table);
-
- kfree(sreg);
-
return 0;
}

-static const struct platform_device_id hi6421v600_regulator_table[] = {
+static const struct platform_device_id hi6421_spmi_regulator_table[] = {
{ .name = "hi6421v600-regulator" },
{},
};
-MODULE_DEVICE_TABLE(platform, hi6421v600_regulator_table);
+MODULE_DEVICE_TABLE(platform, hi6421_spmi_regulator_table);

-static struct platform_driver hi6421v600_regulator_driver = {
- .id_table = hi6421v600_regulator_table,
+static struct platform_driver hi6421_spmi_regulator_driver = {
+ .id_table = hi6421_spmi_regulator_table,
.driver = {
.name = "hi6421v600-regulator",
},
.probe = hi6421_spmi_regulator_probe,
- .remove = hi6421_spmi_regulator_remove,
};
-module_platform_driver(hi6421v600_regulator_driver);
+module_platform_driver(hi6421_spmi_regulator_driver);

MODULE_DESCRIPTION("Hi6421v600 regulator driver");
MODULE_LICENSE("GPL v2");
--
2.29.2