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Message-ID: <1366119899-9789-1-git-send-email-mehar.bajwa@ti.com>
Date: Tue, 16 Apr 2013 19:14:59 +0530
From: Mehar Bajwa <mehar.bajwa@...com>
To: <linux-kernel@...r.kernel.org>, <sameo@...ux.intel.com>
CC: <liam.r.girdwood@...el.com>, <navada@...com>,
Mehar Bajwa <mehar.bajwa@...com>
Subject: [PATCH V2 3/4] mfd: I2C interface with AIC platform
Texas Instruments TLV320AIC family of audio SoC
core functionality controlled via I2C. This driver
provides common support for accessing the device.
Signed-off-by: Mehar Bajwa <mehar.bajwa@...com>
---
drivers/mfd/Kconfig | 12 +++++
drivers/mfd/Makefile | 1 +
drivers/mfd/tlv320aic-i2c.c | 98 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 111 insertions(+), 0 deletions(-)
create mode 100644 drivers/mfd/tlv320aic-i2c.c
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 3019897..40eb328 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -64,11 +64,23 @@ menu "AIC Interface Drivers"
config MFD_AIC_IRQ
bool "Support of IRQ for AIC"
depends on MFD_AIC
+ default y
help
Say yes here if you want support of IRQ for Texas Instruments
AIC codec family.
You have to select individual components like codec device
under the corresponding menus.
+
+config MFD_AIC_I2C
+ bool "AIC I2C Interface"
+ select REGMAP_I2C
+ depends on MFD_AIC
+ depends on I2C
+ help
+ Support for the Texas Instruments TLV320AIC family of audio SoC
+ core functionality controlled via I2C. This driver provides common
+ support for accessing the device, additional drivers must be enabled
+ in order to use the functionality of the device.
endmenu
config MFD_SM501
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 3b39454..1e2c96a 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_MFD_88PM800) += 88pm800.o 88pm80x.o
obj-$(CONFIG_MFD_88PM805) += 88pm805.o 88pm80x.o
obj-$(CONFIG_MFD_AIC) += tlv320aic-core.o
obj-$(CONFIG_MFD_AIC_IRQ) += tlv320aic-irq.o
+obj-$(CONFIG_MFD_AIC_I2C) += tlv320aic-i2c.o
obj-$(CONFIG_MFD_SM501) += sm501.o
obj-$(CONFIG_MFD_ASIC3) += asic3.o tmio_core.o
diff --git a/drivers/mfd/tlv320aic-i2c.c b/drivers/mfd/tlv320aic-i2c.c
new file mode 100644
index 0000000..18987b1
--- /dev/null
+++ b/drivers/mfd/tlv320aic-i2c.c
@@ -0,0 +1,98 @@
+/*
+ * tlv320aic-i2c.c -- driver for TLV320AIC Codecs Family
+ *
+ * Author: Mukund Navada <navada@...com>
+ * Mehar Bajwa <mehar.bajwa@...com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+
+#include <linux/mfd/tlv320aic-core.h>
+
+struct regmap_config aic_i2c_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .cache_type = REGCACHE_NONE,
+};
+
+static int aic_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct aic *aic;
+ const struct regmap_config *regmap_config;
+ int ret;
+
+ regmap_config = &aic_i2c_regmap;
+
+ aic = devm_kzalloc(&i2c->dev, sizeof(*aic), GFP_KERNEL);
+ if (aic == NULL)
+ return -ENOMEM;
+
+ aic->regmap = devm_regmap_init_i2c(i2c, regmap_config);
+
+ if (IS_ERR(aic->regmap)) {
+ ret = PTR_ERR(aic->regmap);
+ dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ aic->type = id->driver_data;
+ aic->dev = &i2c->dev;
+ aic->irq = i2c->irq;
+
+ return aic_device_init(aic);
+}
+
+static int aic_i2c_remove(struct i2c_client *i2c)
+{
+ struct aic *aic = dev_get_drvdata(&i2c->dev);
+
+ aic_device_exit(aic);
+ return 0;
+}
+
+static const struct i2c_device_id aic_i2c_id[] = {
+ {"tlv320aic3262", TLV320AIC3262},
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, aic_i2c_id);
+
+static struct i2c_driver aic_i2c_driver = {
+ .driver = {
+ .name = "tlv320aic",
+ .owner = THIS_MODULE,
+ },
+ .probe = aic_i2c_probe,
+ .remove = aic_i2c_remove,
+ .id_table = aic_i2c_id,
+};
+
+module_i2c_driver(aic_i2c_driver);
+
+MODULE_DESCRIPTION("TLV320AIC I2C bus interface");
+MODULE_AUTHOR("Mukund Navada <navada@...com>");
+MODULE_AUTHOR("Mehar Bajwa <mehar.bajwa@...com>");
+MODULE_LICENSE("GPL");
--
1.7.0.4
--
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