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Message-Id: <1410722585-13393-5-git-send-email-heiko@sntech.de>
Date: Sun, 14 Sep 2014 21:23:04 +0200
From: Heiko Stuebner <heiko@...ech.de>
To: broonie@...nel.org
Cc: linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org,
devicetree@...r.kernel.org, robh+dt@...nel.org, pawel.moll@....com,
mark.rutland@....com, ijc+devicetree@...lion.org.uk,
galak@...eaurora.org, Heiko Stuebner <heiko@...ech.de>
Subject: [PATCH 4/5] regulator: fan53555: add devicetree support
Add the ability to parse regulator-data from the devicetree.
Signed-off-by: Heiko Stuebner <heiko@...ech.de>
---
drivers/regulator/fan53555.c | 53 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 53 insertions(+)
diff --git a/drivers/regulator/fan53555.c b/drivers/regulator/fan53555.c
index d143790..0ec1762 100644
--- a/drivers/regulator/fan53555.c
+++ b/drivers/regulator/fan53555.c
@@ -18,6 +18,7 @@
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/regmap.h>
@@ -233,9 +234,48 @@ static struct regmap_config fan53555_regmap_config = {
.val_bits = 8,
};
+static int slew_rates[] = {
+ 64000,
+ 32000,
+ 16000,
+ 8000,
+ 4000,
+ 2000,
+ 1000,
+ 500,
+};
+
+static struct fan53555_platform_data *fan53555_parse_dt(struct device *dev,
+ struct device_node *np)
+{
+ struct fan53555_platform_data *pdata;
+ int ret, i;
+ u32 tmp;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return NULL;
+
+ pdata->regulator = of_get_regulator_init_data(dev, np);
+
+ ret = of_property_read_u32(np, "fairchild,suspend-regulator", &tmp);
+ if (!ret)
+ pdata->sleep_vsel_id = tmp;
+
+ ret = of_property_read_u32(np, "fairchild,slew-rate-microvolt", &tmp);
+ if (!ret) {
+ for (i = 0; i < ARRAY_SIZE(slew_rates); i++)
+ if (slew_rates[i] == tmp)
+ pdata->slew_rate = i;
+ }
+
+ return pdata;
+}
+
static int fan53555_regulator_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
+ struct device_node *np = client->dev.of_node;
struct fan53555_device_info *di;
struct fan53555_platform_data *pdata;
struct regulator_config config = { };
@@ -243,6 +283,9 @@ static int fan53555_regulator_probe(struct i2c_client *client,
int ret;
pdata = dev_get_platdata(&client->dev);
+ if (!pdata)
+ pdata = fan53555_parse_dt(&client->dev, np);
+
if (!pdata || !pdata->regulator) {
dev_err(&client->dev, "Platform data not found!\n");
return -ENODEV;
@@ -283,11 +326,14 @@ static int fan53555_regulator_probe(struct i2c_client *client,
dev_err(&client->dev, "Failed to setup device!\n");
return ret;
}
+
/* Register regulator */
config.dev = di->dev;
config.init_data = di->regulator;
config.regmap = di->regmap;
config.driver_data = di;
+ config.of_node = np;
+
ret = fan53555_regulator_register(di, &config);
if (ret < 0)
dev_err(&client->dev, "Failed to register regulator!\n");
@@ -295,6 +341,12 @@ static int fan53555_regulator_probe(struct i2c_client *client,
}
+static const struct of_device_id fan53555_dt_ids[] = {
+ { .compatible = "fairchild,fan53555" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, fan53555_dt_ids);
+
static const struct i2c_device_id fan53555_id[] = {
{"fan53555", -1},
{ },
@@ -303,6 +355,7 @@ static const struct i2c_device_id fan53555_id[] = {
static struct i2c_driver fan53555_regulator_driver = {
.driver = {
.name = "fan53555-regulator",
+ .of_match_table = of_match_ptr(fan53555_dt_ids),
},
.probe = fan53555_regulator_probe,
.id_table = fan53555_id,
--
2.0.1
--
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