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authorMark Brown <broonie@opensource.wolfsonmicro.com>2012-11-20 10:39:55 +0900
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-11-20 10:39:55 +0900
commitce6dd5da9dfcf9232df09d8d486cd6ed25e29cdc (patch)
tree5ab56a65bd6b52ae690b16d395c4d15599f43c7c /drivers/regulator/tps6586x-regulator.c
parenta5023574d120ca3b9337cedd4e27de90cae9aff7 (diff)
parent64e481603ab46bcd1466fdaffca50f25bf123f83 (diff)
downloadvexpress-lsk-ce6dd5da9dfcf9232df09d8d486cd6ed25e29cdc.tar.gz
Merge branch 'topic/tps6586x' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator into regulator-hotplug
Conflicts: drivers/regulator/tps6586x-regulator.c
Diffstat (limited to 'drivers/regulator/tps6586x-regulator.c')
-rw-r--r--drivers/regulator/tps6586x-regulator.c181
1 files changed, 155 insertions, 26 deletions
diff --git a/drivers/regulator/tps6586x-regulator.c b/drivers/regulator/tps6586x-regulator.c
index b91400cdbd9..7206f4e3e76 100644
--- a/drivers/regulator/tps6586x-regulator.c
+++ b/drivers/regulator/tps6586x-regulator.c
@@ -17,10 +17,12 @@
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
+#include <linux/of.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
#include <linux/mfd/tps6586x.h>
/* supply control and voltage setting */
@@ -255,10 +257,10 @@ static inline int tps6586x_regulator_preinit(struct device *parent,
1 << ri->enable_bit[1]);
}
-static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev)
+static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev,
+ int id, struct regulator_init_data *p)
{
struct device *parent = pdev->dev.parent;
- struct regulator_init_data *p = pdev->dev.platform_data;
struct tps6586x_settings *setting = p->driver_data;
uint8_t reg;
@@ -269,7 +271,7 @@ static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev)
return 0;
/* only SM0 and SM1 can have the slew rate settings */
- switch (pdev->id) {
+ switch (id) {
case TPS6586X_ID_SM_0:
reg = TPS6586X_SM0SL;
break;
@@ -298,54 +300,181 @@ static inline struct tps6586x_regulator *find_regulator_info(int id)
return NULL;
}
+#ifdef CONFIG_OF
+static struct of_regulator_match tps6586x_matches[] = {
+ { .name = "sys", .driver_data = (void *)TPS6586X_ID_SYS },
+ { .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 },
+ { .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 },
+ { .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 },
+ { .name = "ldo0", .driver_data = (void *)TPS6586X_ID_LDO_0 },
+ { .name = "ldo1", .driver_data = (void *)TPS6586X_ID_LDO_1 },
+ { .name = "ldo2", .driver_data = (void *)TPS6586X_ID_LDO_2 },
+ { .name = "ldo3", .driver_data = (void *)TPS6586X_ID_LDO_3 },
+ { .name = "ldo4", .driver_data = (void *)TPS6586X_ID_LDO_4 },
+ { .name = "ldo5", .driver_data = (void *)TPS6586X_ID_LDO_5 },
+ { .name = "ldo6", .driver_data = (void *)TPS6586X_ID_LDO_6 },
+ { .name = "ldo7", .driver_data = (void *)TPS6586X_ID_LDO_7 },
+ { .name = "ldo8", .driver_data = (void *)TPS6586X_ID_LDO_8 },
+ { .name = "ldo9", .driver_data = (void *)TPS6586X_ID_LDO_9 },
+ { .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC },
+};
+
+static struct tps6586x_platform_data *tps6586x_parse_regulator_dt(
+ struct platform_device *pdev,
+ struct of_regulator_match **tps6586x_reg_matches)
+{
+ const unsigned int num = ARRAY_SIZE(tps6586x_matches);
+ struct device_node *np = pdev->dev.parent->of_node;
+ struct device_node *regs;
+ const char *sys_rail = NULL;
+ unsigned int i;
+ struct tps6586x_platform_data *pdata;
+ int err;
+
+ regs = of_find_node_by_name(np, "regulators");
+ if (!regs) {
+ dev_err(&pdev->dev, "regulator node not found\n");
+ return NULL;
+ }
+
+ err = of_regulator_match(&pdev->dev, regs, tps6586x_matches, num);
+ if (err < 0) {
+ dev_err(&pdev->dev, "Regulator match failed, e %d\n", err);
+ of_node_put(regs);
+ return NULL;
+ }
+
+ of_node_put(regs);
+
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata) {
+ dev_err(&pdev->dev, "Memory alloction failed\n");
+ return NULL;
+ }
+
+ for (i = 0; i < num; i++) {
+ int id;
+ if (!tps6586x_matches[i].init_data)
+ continue;
+
+ pdata->reg_init_data[i] = tps6586x_matches[i].init_data;
+ id = (int)tps6586x_matches[i].driver_data;
+ if (id == TPS6586X_ID_SYS)
+ sys_rail = pdata->reg_init_data[i]->constraints.name;
+
+ if ((id == TPS6586X_ID_LDO_5) || (id == TPS6586X_ID_LDO_RTC))
+ pdata->reg_init_data[i]->supply_regulator = sys_rail;
+ }
+ *tps6586x_reg_matches = tps6586x_matches;
+ return pdata;
+}
+#else
+static struct tps6586x_platform_data *tps6586x_parse_regulator_dt(
+ struct platform_device *pdev,
+ struct of_regulator_match **tps6586x_reg_matches)
+{
+ *tps6586x_reg_matches = NULL;
+ return NULL;
+}
+#endif
+
static int tps6586x_regulator_probe(struct platform_device *pdev)
{
struct tps6586x_regulator *ri = NULL;
struct regulator_config config = { };
- struct regulator_dev *rdev;
- int id = pdev->id;
+ struct regulator_dev **rdev;
+ struct regulator_init_data *reg_data;
+ struct tps6586x_platform_data *pdata;
+ struct of_regulator_match *tps6586x_reg_matches = NULL;
+ int id;
int err;
dev_dbg(&pdev->dev, "Probing regulator %d\n", id);
- ri = find_regulator_info(id);
- if (ri == NULL) {
- dev_err(&pdev->dev, "invalid regulator ID specified\n");
- return -EINVAL;
- }
+ pdata = dev_get_platdata(pdev->dev.parent);
+ if ((!pdata) && (pdev->dev.parent->of_node))
+ pdata = tps6586x_parse_regulator_dt(pdev,
+ &tps6586x_reg_matches);
- err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
- if (err)
- return err;
+ if (!pdata) {
+ dev_err(&pdev->dev, "Platform data not available, exiting\n");
+ return -ENODEV;
+ }
- config.dev = pdev->dev.parent;
- config.of_node = pdev->dev.of_node;
- config.init_data = pdev->dev.platform_data;
- config.driver_data = ri;
+ rdev = devm_kzalloc(&pdev->dev, TPS6586X_ID_MAX_REGULATOR *
+ sizeof(*rdev), GFP_KERNEL);
+ if (!rdev) {
+ dev_err(&pdev->dev, "Mmemory alloc failed\n");
+ return -ENOMEM;
+ }
- rdev = regulator_register(&ri->desc, &config);
- if (IS_ERR(rdev)) {
- dev_err(&pdev->dev, "failed to register regulator %s\n",
- ri->desc.name);
- return PTR_ERR(rdev);
+ for (id = 0; id < TPS6586X_ID_MAX_REGULATOR; ++id) {
+ reg_data = pdata->reg_init_data[id];
+
+ ri = find_regulator_info(id);
+ if (!ri) {
+ dev_err(&pdev->dev, "invalid regulator ID specified\n");
+ err = -EINVAL;
+ goto fail;
+ }
+
+ err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
+ if (err) {
+ dev_err(&pdev->dev,
+ "regulator %d preinit failed, e %d\n", id, err);
+ goto fail;
+ }
+
+ config.dev = pdev->dev.parent;
+ config.init_data = reg_data;
+ config.driver_data = ri;
+
+ if (tps6586x_reg_matches)
+ config.of_node = tps6586x_reg_matches[id].of_node;
+
+ rdev[id] = regulator_register(&ri->desc, &config);
+ if (IS_ERR(rdev[id])) {
+ dev_err(&pdev->dev, "failed to register regulator %s\n",
+ ri->desc.name);
+ err = PTR_ERR(rdev[id]);
+ goto fail;
+ }
+
+ if (reg_data) {
+ err = tps6586x_regulator_set_slew_rate(pdev, id,
+ reg_data);
+ if (err < 0) {
+ dev_err(&pdev->dev,
+ "Slew rate config failed, e %d\n", err);
+ regulator_unregister(rdev[id]);
+ goto fail;
+ }
+ }
}
platform_set_drvdata(pdev, rdev);
+ return 0;
- return tps6586x_regulator_set_slew_rate(pdev);
+fail:
+ while (--id >= 0)
+ regulator_unregister(rdev[id]);
+ return err;
}
static int __devexit tps6586x_regulator_remove(struct platform_device *pdev)
{
- struct regulator_dev *rdev = platform_get_drvdata(pdev);
+ struct regulator_dev **rdev = platform_get_drvdata(pdev);
+ int id = TPS6586X_ID_MAX_REGULATOR;
+
+ while (--id >= 0)
+ regulator_unregister(rdev[id]);
- regulator_unregister(rdev);
return 0;
}
static struct platform_driver tps6586x_regulator_driver = {
.driver = {
- .name = "tps6586x-regulator",
+ .name = "tps6586x-pmic",
.owner = THIS_MODULE,
},
.probe = tps6586x_regulator_probe,