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Date: Tue, 16 Apr 2013 19:15:23 +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 4/4] mfd: SPI interface with AIC platform
Texas Instruments TLV320AIC family of audio SoC
core functionality controlled via SPI. This driver
provides common support for accessing the device.
Signed-off-by: Mehar Bajwa <mehar.bajwa@...com>
---
drivers/mfd/Kconfig | 11 +++++
drivers/mfd/Makefile | 1 +
drivers/mfd/tlv320aic-spi.c | 97 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 109 insertions(+), 0 deletions(-)
create mode 100644 drivers/mfd/tlv320aic-spi.c
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 40eb328..b1d6269 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -81,6 +81,17 @@ config MFD_AIC_I2C
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.
+
+config MFD_AIC_SPI
+ bool "AIC SPI Interface"
+ select REGMAP_SPI
+ depends on MFD_AIC
+ depends on SPI_MASTER
+ help
+ Support for the Texas Instruments TLV320AIC family of audio SoC
+ core functionality controlled via SPI. 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 1e2c96a..dfdcfa2 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -9,6 +9,7 @@ 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-$(CONFIG_MFD_AIC_SPI) += tlv320aic-spi.o
obj-$(CONFIG_MFD_SM501) += sm501.o
obj-$(CONFIG_MFD_ASIC3) += asic3.o tmio_core.o
diff --git a/drivers/mfd/tlv320aic-spi.c b/drivers/mfd/tlv320aic-spi.c
new file mode 100644
index 0000000..2faeb40
--- /dev/null
+++ b/drivers/mfd/tlv320aic-spi.c
@@ -0,0 +1,97 @@
+/*
+ * tlv320aic-spi.c -- driver for TLV320AIC
+ *
+ * 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/err.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/spi/spi.h>
+
+#include <linux/mfd/tlv320aic-core.h>
+
+struct regmap_config aic_spi_regmap = {
+ .reg_bits = 7,
+ .val_bits = 8,
+ .cache_type = REGCACHE_NONE,
+ .read_flag_mask = 0x1,
+ .pad_bits = 1,
+};
+
+static int tlv320aic_spi_probe(struct spi_device *spi)
+{
+ const struct spi_device_id *id = spi_get_device_id(spi);
+ struct aic *aic;
+ const struct regmap_config *regmap_config;
+ int ret;
+
+ regmap_config = &aic_spi_regmap;
+
+ aic = devm_kzalloc(&spi->dev, sizeof(struct aic), GFP_KERNEL);
+ if (aic == NULL)
+ return -ENOMEM;
+
+ aic->regmap = devm_regmap_init_spi(spi, regmap_config);
+ if (IS_ERR(aic->regmap)) {
+ ret = PTR_ERR(aic->regmap);
+ dev_err(&spi->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ aic->type = id->driver_data;
+ aic->dev = &spi->dev;
+ aic->irq = spi->irq;
+
+ return aic_device_init(aic);
+}
+
+static int tlv320aic_spi_remove(struct spi_device *spi)
+{
+ struct aic *aic = dev_get_drvdata(&spi->dev);
+ aic_device_exit(aic);
+ return 0;
+}
+
+static const struct spi_device_id aic_spi_ids[] = {
+ {"tlv320aic3262", TLV320AIC3262},
+ { }
+};
+MODULE_DEVICE_TABLE(spi, aic_spi_ids);
+
+static struct spi_driver tlv320aic_spi_driver = {
+ .driver = {
+ .name = "tlv320aic",
+ .owner = THIS_MODULE,
+ },
+ .probe = tlv320aic_spi_probe,
+ .remove = tlv320aic_spi_remove,
+ .id_table = aic_spi_ids,
+};
+
+module_spi_driver(tlv320aic_spi_driver);
+
+MODULE_DESCRIPTION("TLV320AIC SPI 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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