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Message-Id: <1334245182-31725-1-git-send-email-paul.liu@linaro.org>
Date: Thu, 12 Apr 2012 23:39:41 +0800
From: "Ying-Chun Liu (PaulLiu)" <paul.liu@...aro.org>
To: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org, linaro-dev@...ts.linaro.org,
patches@...aro.org, broonie@...nsource.wolfsonmicro.com,
"Ying-Chun Liu (PaulLiu)" <paul.liu@...aro.org>,
Samuel Ortiz <sameo@...ux.intel.com>,
Shawn Guo <shawn.guo@...aro.org>,
Ashish Jangam <ashish.jangam@...tcummins.com>
Subject: [PATCH 1/2] mfd: da9052: add device-tree support for i2c driver
From: "Ying-Chun Liu (PaulLiu)" <paul.liu@...aro.org>
This patch adds device-tree support for dialog MFD and the binding
documentations.
Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@...aro.org>
Cc: Samuel Ortiz <sameo@...ux.intel.com>
Cc: Shawn Guo <shawn.guo@...aro.org>
Cc: Ashish Jangam <ashish.jangam@...tcummins.com>
---
.../devicetree/bindings/mfd/da9052-i2c.txt | 58 ++++++++++++++++++++
drivers/mfd/da9052-i2c.c | 54 +++++++++++++++---
2 files changed, 104 insertions(+), 8 deletions(-)
create mode 100644 Documentation/devicetree/bindings/mfd/da9052-i2c.txt
diff --git a/Documentation/devicetree/bindings/mfd/da9052-i2c.txt b/Documentation/devicetree/bindings/mfd/da9052-i2c.txt
new file mode 100644
index 0000000..042d042
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/da9052-i2c.txt
@@ -0,0 +1,58 @@
+* Dialog DA9052/53 Power Management Integrated Circuit (PMIC)
+
+Required properties:
+- compatible : Should be "dialog,da9052", "dialog,da9053-aa",
+ "dialog,da9053-ab", or "dialog,da9053-bb"
+
+Sub-nodes:
+- regulators : Contain the regulator nodes. The DA9052 regulators are
+ sorted as following:
+
+ buck_core : regulator BUCK_CORE (id: 0 )
+ buck_pro : regulator BUCK_PRO (id: 1 )
+ buck_mem : regulator BUCK_MEM (id: 2 )
+ buck_peri : regulator BUCK_PERI (id: 3 )
+ ldo1 : regulator LDO1 (id: 4 )
+ ldo2 : regulator LDO2 (id: 5 )
+ ldo3 : regulator LDO3 (id: 6 )
+ ldo4 : regulator LDO4 (id: 7 )
+ ldo5 : regulator LDO5 (id: 8 )
+ ldo6 : regulator LDO6 (id: 9 )
+ ldo7 : regulator LDO7 (id: 10)
+ ldo8 : regulator LDO8 (id: 11)
+ ldo9 : regulator LDO9 (id: 12)
+ ldo10 : regulator LDO10 (id: 13)
+
+ The bindings details of individual regulator device can be found in:
+ Documentation/devicetree/bindings/regulator/regulator.txt
+
+Examples:
+
+i2c@...c8000 { /* I2C1 */
+ status = "okay";
+
+ pmic: dialog@48 {
+ compatible = "dialog,da9053-aa";
+ reg = <0x48>;
+
+ regulators {
+ regulator-buck0 {
+ regulator-name = "DA9052_BUCK_CORE";
+ regulator-min-microvolt = <500000>;
+ regulator-max-microvolt = <2075000>;
+ };
+
+ regulator-buck1 {
+ regulator-name = "DA9052_BUCK_PRO";
+ regulator-min-microvolt = <500000>;
+ regulator-max-microvolt = <2075000>;
+ };
+
+ regulator-buck2 {
+ regulator-name = "DA9052_BUCK_MEM";
+ regulator-min-microvolt = <925000>;
+ regulator-max-microvolt = <2500000>;
+ };
+ };
+ };
+};
diff --git a/drivers/mfd/da9052-i2c.c b/drivers/mfd/da9052-i2c.c
index 36b88e3..e07bcfa 100644
--- a/drivers/mfd/da9052-i2c.c
+++ b/drivers/mfd/da9052-i2c.c
@@ -22,6 +22,11 @@
#include <linux/mfd/da9052/da9052.h>
#include <linux/mfd/da9052/reg.h>
+#ifdef CONFIG_OF
+#include <linux/of.h>
+#include <linux/of_device.h>
+#endif
+
static int da9052_i2c_enable_multiwrite(struct da9052 *da9052)
{
int reg_val, ret;
@@ -41,6 +46,24 @@ static int da9052_i2c_enable_multiwrite(struct da9052 *da9052)
return 0;
}
+static struct i2c_device_id da9052_i2c_id[] = {
+ {"da9052", DA9052},
+ {"da9053-aa", DA9053_AA},
+ {"da9053-ba", DA9053_BA},
+ {"da9053-bb", DA9053_BB},
+ {}
+};
+
+#ifdef CONFIG_OF
+static const struct of_device_id dialog_dt_ids[] = {
+ { .compatible = "dialog,da9052" },
+ { .compatible = "dialog,da9053-aa" },
+ { .compatible = "dialog,da9053-ab" },
+ { .compatible = "dialog,da9053-bb" },
+ { /* sentinel */ }
+};
+#endif
+
static int __devinit da9052_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -76,6 +99,26 @@ static int __devinit da9052_i2c_probe(struct i2c_client *client,
if (ret < 0)
goto err_regmap;
+#ifdef CONFIG_OF
+ if (!id) {
+ int i;
+ struct device_node *np = client->dev.of_node;
+
+ for (i = 0;
+ i < sizeof(dialog_dt_ids)/sizeof(dialog_dt_ids[0]);
+ i++)
+ if (of_device_is_compatible(np,
+ dialog_dt_ids[i].compatible))
+ id = &da9052_i2c_id[i];
+ }
+#endif
+
+ if (!id) {
+ ret = -ENODEV;
+ dev_err(&client->dev, "id is null.\n");
+ goto err_regmap;
+ }
+
ret = da9052_device_init(da9052, id->driver_data);
if (ret != 0)
goto err_regmap;
@@ -100,14 +143,6 @@ static int __devexit da9052_i2c_remove(struct i2c_client *client)
return 0;
}
-static struct i2c_device_id da9052_i2c_id[] = {
- {"da9052", DA9052},
- {"da9053-aa", DA9053_AA},
- {"da9053-ba", DA9053_BA},
- {"da9053-bb", DA9053_BB},
- {}
-};
-
static struct i2c_driver da9052_i2c_driver = {
.probe = da9052_i2c_probe,
.remove = __devexit_p(da9052_i2c_remove),
@@ -115,6 +150,9 @@ static struct i2c_driver da9052_i2c_driver = {
.driver = {
.name = "da9052",
.owner = THIS_MODULE,
+#ifdef CONFIG_OF
+ .of_match_table = dialog_dt_ids,
+#endif
},
};
--
1.7.9.5
--
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