[PATCH 4/4] mfd: Add device tree bindings for Arizona class devices
From: Mark Brown
Date: Wed Apr 17 2013 - 11:59:24 EST
Signed-off-by: Mark Brown <broonie@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
Documentation/devicetree/bindings/mfd/arizona.txt | 62 +++++++++++++++++++
drivers/mfd/arizona-core.c | 68 +++++++++++++++++++++
drivers/mfd/arizona-i2c.c | 10 ++-
drivers/mfd/arizona-spi.c | 10 ++-
drivers/mfd/arizona.h | 12 ++++
5 files changed, 158 insertions(+), 4 deletions(-)
create mode 100644 Documentation/devicetree/bindings/mfd/arizona.txt
diff --git a/Documentation/devicetree/bindings/mfd/arizona.txt b/Documentation/devicetree/bindings/mfd/arizona.txt
new file mode 100644
index 0000000..0e295c9
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/arizona.txt
@@ -0,0 +1,62 @@
+Wolfson Arizona class audio SoCs
+
+These devices are audio SoCs with extensive digital capabilites and a range
+of analogue I/O.
+
+Required properties:
+
+ - compatible : one of the following chip-specific strings:
+ "wlf,wm5102"
+ "wlf,wm5110"
+ - reg : I2C slave address when connected using I2C, chip select number when
+ using SPI.
+
+ - interrupts : The interrupt line the /IRQ signal for the device is
+ connected to.
+ - interrupt-controller : Arizona class devices contain interrupt controllers
+ and may provide interrupt services to other devices.
+ - interrupt-parent : The parent interrupt controller.
+ - #interrupt-cells: the number of cells to describe an IRQ, this should be 2.
+ The first cell is the IRQ number.
+ The second cell is the flags, encoded as the trigger masks from
+ Documentation/devicetree/bindings/interrupts.txt
+
+ - gpio-controller : Indicates this device is a GPIO controller.
+ - #gpio-cells : Must be 2. The first cell is the pin number and the
+ second cell is used to specify optional parameters (currently unused).
+
+ - AVDD1-supply, DBVDD1-supply, DBVDD2-supply, DBVDD3-supply, CPVDD-supply,
+ SPKVDDL-supply, SPKVDDR-supply : power supplies for the device, as covered
+ in Documentation/devicetree/bindings/regulator/regulator.txt
+
+Optional properties:
+
+ - wlf,reset : GPIO specifier for the GPIO controlling /RESET
+ - wlf,ldoena : GPIO specifier for the GPIO controlling LDOENA
+
+ - wlf,gpio-defaults : A list of GPIO configuration register values. If
+ absent, no configuration of these registers is performed. If any
+ entry has a value that is out of range for a 16 bit register then
+ the chip default will be used. If present exactly five values must
+ be specified.
+
+Example:
+
+codec: wm5102@1a {
+ compatible = "wlf,wm5102";
+ reg = <0x1a>;
+ interrupts = <347>;
+ #interrupt-cells = <2>;
+ interrupt-parent = <&gic>;
+
+ gpio-controller;
+ #gpio-cells = <2>;
+
+ wlf,gpio-defaults = <
+ 0x00000000, /* AIF1TXLRCLK */
+ 0xffffffff,
+ 0xffffffff,
+ 0xffffffff,
+ 0xffffffff,
+ >;
+};
diff --git a/drivers/mfd/arizona-core.c b/drivers/mfd/arizona-core.c
index 1d20ce0..cbb3e45 100644
--- a/drivers/mfd/arizona-core.c
+++ b/drivers/mfd/arizona-core.c
@@ -16,6 +16,9 @@
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
@@ -439,6 +442,69 @@ const struct dev_pm_ops arizona_pm_ops = {
};
EXPORT_SYMBOL_GPL(arizona_pm_ops);
+#ifdef CONFIG_OF
+int arizona_of_get_type(struct device *dev)
+{
+ const struct of_device_id *id = of_match_device(arizona_of_match, dev);
+
+ if (id)
+ return (int)id->data;
+ else
+ return 0;
+}
+EXPORT_SYMBOL_GPL(arizona_of_get_type);
+
+static int arizona_of_get_core_pdata(struct arizona *arizona)
+{
+ int ret, i;
+
+ arizona->pdata.reset = of_get_named_gpio(arizona->dev->of_node,
+ "wlf,reset", 0);
+ if (arizona->pdata.reset < 0)
+ arizona->pdata.reset = 0;
+
+ arizona->pdata.ldoena = of_get_named_gpio(arizona->dev->of_node,
+ "wlf,ldoena", 0);
+ if (arizona->pdata.ldoena < 0)
+ arizona->pdata.ldoena = 0;
+
+ ret = of_property_read_u32_array(arizona->dev->of_node,
+ "wlf,gpio-defaults",
+ arizona->pdata.gpio_defaults,
+ ARRAY_SIZE(arizona->pdata.gpio_defaults));
+ if (ret >= 0) {
+ /*
+ * All values are literal except out of range values
+ * which are chip default, translate into platform
+ * data which uses 0 as chip default and out of range
+ * as zero.
+ */
+ for (i = 0; i < ARRAY_SIZE(arizona->pdata.gpio_defaults); i++) {
+ if (arizona->pdata.gpio_defaults[i] > 0xffff)
+ arizona->pdata.gpio_defaults[i] = 0;
+ if (arizona->pdata.gpio_defaults[i] == 0)
+ arizona->pdata.gpio_defaults[i] = 0x10000;
+ }
+ } else {
+ dev_err(arizona->dev, "Failed to parse GPIO defaults: %d\n",
+ ret);
+ }
+
+ return 0;
+}
+
+const struct of_device_id arizona_of_match[] = {
+ { .compatible = "wlf,wm5102", .data = (void *)WM5102 },
+ { .compatible = "wlf,wm5110", .data = (void *)WM5110 },
+ {},
+};
+EXPORT_SYMBOL_GPL(arizona_of_match);
+#else
+static inline int arizona_of_get_core_pdata(struct arizona *arizona)
+{
+}
+#endif
+
static struct mfd_cell early_devs[] = {
{ .name = "arizona-ldo1" },
};
@@ -472,6 +538,8 @@ int arizona_dev_init(struct arizona *arizona)
dev_set_drvdata(arizona->dev, arizona);
mutex_init(&arizona->clk_lock);
+ arizona_of_get_core_pdata(arizona);
+
if (dev_get_platdata(arizona->dev))
memcpy(&arizona->pdata, dev_get_platdata(arizona->dev),
sizeof(arizona->pdata));
diff --git a/drivers/mfd/arizona-i2c.c b/drivers/mfd/arizona-i2c.c
index 44a1bb9..deb267e 100644
--- a/drivers/mfd/arizona-i2c.c
+++ b/drivers/mfd/arizona-i2c.c
@@ -27,9 +27,14 @@ static int arizona_i2c_probe(struct i2c_client *i2c,
{
struct arizona *arizona;
const struct regmap_config *regmap_config;
- int ret;
+ int ret, type;
- switch (id->driver_data) {
+ if (i2c->dev.of_node)
+ type = arizona_of_get_type(&i2c->dev);
+ else
+ type = id->driver_data;
+
+ switch (type) {
#ifdef CONFIG_MFD_WM5102
case WM5102:
regmap_config = &wm5102_i2c_regmap;
@@ -84,6 +89,7 @@ static struct i2c_driver arizona_i2c_driver = {
.name = "arizona",
.owner = THIS_MODULE,
.pm = &arizona_pm_ops,
+ .of_match_table = of_match_ptr(arizona_of_match),
},
.probe = arizona_i2c_probe,
.remove = arizona_i2c_remove,
diff --git a/drivers/mfd/arizona-spi.c b/drivers/mfd/arizona-spi.c
index b57e642..47be7b3 100644
--- a/drivers/mfd/arizona-spi.c
+++ b/drivers/mfd/arizona-spi.c
@@ -27,9 +27,14 @@ static int arizona_spi_probe(struct spi_device *spi)
const struct spi_device_id *id = spi_get_device_id(spi);
struct arizona *arizona;
const struct regmap_config *regmap_config;
- int ret;
+ int ret, type;
- switch (id->driver_data) {
+ if (spi->dev.of_node)
+ type = arizona_of_get_type(&spi->dev);
+ else
+ type = id->driver_data;
+
+ switch (type) {
#ifdef CONFIG_MFD_WM5102
case WM5102:
regmap_config = &wm5102_spi_regmap;
@@ -84,6 +89,7 @@ static struct spi_driver arizona_spi_driver = {
.name = "arizona",
.owner = THIS_MODULE,
.pm = &arizona_pm_ops,
+ .of_match_table = of_match_ptr(arizona_of_match),
},
.probe = arizona_spi_probe,
.remove = arizona_spi_remove,
diff --git a/drivers/mfd/arizona.h b/drivers/mfd/arizona.h
index 9798ae5..db55d98 100644
--- a/drivers/mfd/arizona.h
+++ b/drivers/mfd/arizona.h
@@ -13,6 +13,7 @@
#ifndef _WM5102_H
#define _WM5102_H
+#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/pm.h>
@@ -26,6 +27,8 @@ extern const struct regmap_config wm5110_spi_regmap;
extern const struct dev_pm_ops arizona_pm_ops;
+extern const struct of_device_id arizona_of_match[];
+
extern const struct regmap_irq_chip wm5102_aod;
extern const struct regmap_irq_chip wm5102_irq;
@@ -37,4 +40,13 @@ int arizona_dev_exit(struct arizona *arizona);
int arizona_irq_init(struct arizona *arizona);
int arizona_irq_exit(struct arizona *arizona);
+#ifdef CONFIG_OF
+int arizona_of_get_type(struct device *dev);
+#else
+static inline int arizona_of_get_type(struct device *dev)
+{
+ return 0;
+}
+#endif
+
#endif
--
1.7.10.4
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