[PATCH 1/3] Adding Skyworks SKY81452 MFD driver

Gyungoh Yoo
2014-08-08T09:08:36Z

Signed-off-by: Gyungoh Yoo <jack.yoo@skyworksinc.com>
---
Documentation/devicetree/bindings/mfd/sky81452.txt | 24 +++++
.../devicetree/bindings/vendor-prefixes.txt | 1 +
drivers/mfd/Kconfig | 12 +++
drivers/mfd/Makefile | 1 +
drivers/mfd/sky81452.c | 113 +++++++++++++++++++++
include/linux/mfd/sky81452.h | 32 ++++++
6 files changed, 183 insertions(+)
create mode 100644 Documentation/devicetree/bindings/mfd/sky81452.txt
create mode 100644 drivers/mfd/sky81452.c
create mode 100644 include/linux/mfd/sky81452.h

diff --git a/Documentation/devicetree/bindings/mfd/sky81452.txt b/Documentation/devicetree/bindings/mfd/sky81452.txt
new file mode 100644
index 0000000..5fb0b4f
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/sky81452.txt
@@ -0,0 +1,24 @@
+SKY81452 bindings
+
+Required properties:
+- compatible : Must be "skyworks,sky81452"
+
+Required child nodes:
+- backlight : container node for backlight following the binding
+ in video/backlight/sky81452-backlight.txt
+- regulator : container node for regulators following the binding
+ in regulator/sky81452-regulator.txt
+
+Example:
+
+ sky81452@2C {
+ compatible = "skyworks,sky81452";
+
+ backlight {
+ ...
+ };
+
+ regulator {
+ ...
+ };
+ };
diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
index d415b38..ce76e10 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.txt
+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
@@ -122,6 +122,7 @@ silabs Silicon Laboratories
simtek
sii Seiko Instruments, Inc.
sirf SiRF Technology, Inc.
+skyworks Skyworks Solutions, Inc.
smsc Standard Microsystems Corporation
snps Synopsys, Inc.
spansion Spansion Inc.
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index de5abf2..acfb2e5 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -626,6 +626,18 @@ config MFD_SM501_GPIO
lines on the SM501. The platform data is used to supply the
base number for the first GPIO line to register.

+config SKY81452
+ tristate "Skyworks Solutions SKY81452"
+ select MFD_CORE
+ select REGMAP_I2C
+ depends on I2C=y
+ help
+ This is the core driver for the Skyworks SKY81452 backlight and
+ voltage regulator device.
+
+ This driver can also be built as a module. If so, the module
+ will be called sky81452.
+
config MFD_SMSC
bool "SMSC ECE1099 series chips"
depends on I2C=y
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index f001487..191c656 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -169,6 +169,7 @@ obj-$(CONFIG_MFD_AS3711) += as3711.o
obj-$(CONFIG_MFD_AS3722) += as3722.o
obj-$(CONFIG_MFD_STW481X) += stw481x.o
obj-$(CONFIG_MFD_IPAQ_MICRO) += ipaq-micro.o
+obj-$(CONFIG_SKY81452) += sky81452.o

intel-soc-pmic-objs := intel_soc_pmic_core.o intel_soc_pmic_crc.o
obj-$(CONFIG_INTEL_SOC_PMIC) += intel-soc-pmic.o
diff --git a/drivers/mfd/sky81452.c b/drivers/mfd/sky81452.c
new file mode 100644
index 0000000..566912f
--- /dev/null
+++ b/drivers/mfd/sky81452.c
@@ -0,0 +1,113 @@
+/*
+ * sky81452.c SKY81452 MFD driver
+ *
+ * Copyright 2014 Skyworks Solutions Inc.
+ * Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/sky81452.h>
+
+static const struct regmap_config sky81452_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int sky81452_register_devices(struct device *dev,
+ const struct sky81452_platform_data *pdata)
+{
+ struct mfd_cell cells[] = {
+ {
+ .name = "sky81452-bl",
+ .platform_data = pdata->bl_pdata,
+ .pdata_size = sizeof(*pdata->bl_pdata),
+ },
+ {
+ .name = "sky81452-regulator",
+ .platform_data = pdata->regulator_init_data,
+ .pdata_size = sizeof(*pdata->regulator_init_data),
+ },
+ };
+
+ return mfd_add_devices(dev, -1, cells, ARRAY_SIZE(cells),
+ NULL, 0, NULL);
+}
+
+static int sky81452_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev = &client->dev;
+ const struct sky81452_platform_data *pdata = dev_get_platdata(dev);
+ struct regmap *map;
+
+ if (!pdata) {
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+ }
+
+ map = devm_regmap_init_i2c(client, &sky81452_config);
+ if (IS_ERR(map))
+ return PTR_ERR(map);
+
+ i2c_set_clientdata(client, map);
+
+ return sky81452_register_devices(dev, pdata);
+}
+
+static int sky81452_remove(struct i2c_client *client)
+{
+ mfd_remove_devices(&client->dev);
+ return 0;
+}
+
+static const struct i2c_device_id sky81452_ids[] = {
+ { "sky81452", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, sky81452_ids);
+
+#ifdef CONFIG_OF
+static const struct of_device_id sky81452_of_match[] = {
+ { .compatible = "skyworks,sky81452", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, sky81452_of_match);
+#endif
+
+static struct i2c_driver sky81452_driver = {
+ .driver = {
+ .name = "sky81452",
+ .of_match_table = of_match_ptr(sky81452_of_match),
+ },
+ .probe = sky81452_probe,
+ .remove = sky81452_remove,
+ .id_table = sky81452_ids,
+};
+
+module_i2c_driver(sky81452_driver);
+
+MODULE_DESCRIPTION("Skyworks SKY81452 MFD driver");
+MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
+MODULE_LICENSE("GPL");
+MODULE_VERSION("1.0");
diff --git a/include/linux/mfd/sky81452.h b/include/linux/mfd/sky81452.h
new file mode 100644
index 0000000..8d8ed35
--- /dev/null
+++ b/include/linux/mfd/sky81452.h
@@ -0,0 +1,32 @@
+/*
+ * sky81452.h SKY81452 backlight driver
+ *
+ * Copyright 2014 Skyworks Solutions Inc.
+ * Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _SKY81452_H
+#define _SKY81452_H
+
+#include "linux/sky81452-backlight.h"
+#include "linux/regulator/machine.h"
+
+struct sky81452_platform_data {
+ struct sky81452_bl_platform_data *bl_pdata;
+ struct regulator_init_data *regulator_init_data;
+};
+
+#endif
--
1.9.1