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Date: Mon, 12 Dec 2011 20:37:41 +0530
From: Ashish Jangam <ashish.jangam@...tcummins.com>
To: Mark Brown <broonie@...nsource.wolfsonmicro.com>
CC: <linux-kernel@...r.kernel.org>, Dajun <dajun.chen@...semi.com>,
<arnd@...db.de>, <linaro-dev@...ts.linaro.org>,
<eric.miao@...aro.org>, <sameo@...ux.intel.com>
Subject: [PATCH 03/06] MFD: DA9052/53 MFD core module add SPI support v2
This patch add SPI support for DA9052/53 MFD core module.
This patch is functionally tested on Samsung SMDKV6410.
Signed-off-by: David Dajun Chen <dchen@...semi.com>
Signed-off-by: Ashish Jangam <ashish.jangam@...tcummins.com>
---
Changes since v1:
- Remove spi_dev from struct da9052
- Move regmap_config due to added support of regmap cache
---
drivers/mfd/Kconfig | 12 +++++
drivers/mfd/Makefile | 1 +
drivers/mfd/da9052-spi.c | 115 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 128 insertions(+), 0 deletions(-)
create mode 100644 drivers/mfd/da9052-spi.c
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index baced42..c8322ee 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -332,6 +332,18 @@ config PMIC_DA9052
bool
select MFD_CORE
+config MFD_DA9052_SPI
+ bool "Support Dialog Semiconductor DA9052/53 PMIC variants with SPI"
+ select REGMAP_SPI
+ select REGMAP_IRQ
+ select PMIC_DA9052
+ depends on SPI_MASTER=y
+ help
+ Support for the Dialog Semiconductor DA9052 PMIC
+ when controlled using SPI. 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_DA9052_I2C
bool "Support Dialog Semiconductor DA9052/53 PMIC variants with I2C"
select REGMAP_I2C
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 484f209..d5f5743 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -69,6 +69,7 @@ obj-$(CONFIG_UCB1400_CORE) += ucb1400_core.o
obj-$(CONFIG_PMIC_DA903X) += da903x.o
obj-$(CONFIG_PMIC_DA9052) += da9052-core.o
+obj-$(CONFIG_MFD_DA9052_SPI) += da9052-spi.o
obj-$(CONFIG_MFD_DA9052_I2C) += da9052-i2c.o
max8925-objs := max8925-core.o max8925-i2c.o
diff --git a/drivers/mfd/da9052-spi.c b/drivers/mfd/da9052-spi.c
new file mode 100644
index 0000000..cdbc7ca
--- /dev/null
+++ b/drivers/mfd/da9052-spi.c
@@ -0,0 +1,115 @@
+/*
+ * SPI access for Dialog DA9052 PMICs.
+ *
+ * Copyright(c) 2011 Dialog Semiconductor Ltd.
+ *
+ * Author: David Dajun Chen <dchen@...semi.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 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/mfd/core.h>
+#include <linux/spi/spi.h>
+#include <linux/err.h>
+
+#include <linux/mfd/da9052/da9052.h>
+
+static int da9052_spi_probe(struct spi_device *spi)
+{
+ int ret;
+ const struct spi_device_id *id = spi_get_device_id(spi);
+ struct da9052 *da9052 = kzalloc(sizeof(struct da9052), GFP_KERNEL);
+
+ if (!da9052)
+ return -ENOMEM;
+
+ spi->mode = SPI_MODE_0 | SPI_CPOL;
+ spi->bits_per_word = 8;
+ spi_setup(spi);
+
+ da9052->dev = &spi->dev;
+ da9052->chip_irq = spi->irq;
+
+ dev_set_drvdata(&spi->dev, da9052);
+
+ da9052_regmap_config.read_flag_mask = 1;
+ da9052_regmap_config.write_flag_mask = 0;
+
+ da9052->regmap = regmap_init_spi(spi, &da9052_regmap_config);
+ if (IS_ERR(da9052->regmap)) {
+ ret = PTR_ERR(da9052->regmap);
+ dev_err(&spi->dev, "Failed to allocate register map: %d\n",
+ ret);
+ goto err;
+ }
+
+ ret = da9052_device_init(da9052, id->driver_data);
+ if (ret != 0)
+ goto err;
+
+ return 0;
+
+err:
+ kfree(da9052);
+ return ret;
+}
+
+static int da9052_spi_remove(struct spi_device *spi)
+{
+ struct da9052 *da9052 = dev_get_drvdata(&spi->dev);
+
+ da9052_device_exit(da9052);
+ kfree(da9052);
+
+ return 0;
+}
+
+static struct spi_device_id da9052_spi_id[] = {
+ {"da9052", DA9052},
+ {"da9053-aa", DA9053_AA},
+ {"da9053-ba", DA9053_BA},
+ {"da9053-bb", DA9053_BB},
+ {}
+};
+
+static struct spi_driver da9052_spi_driver = {
+ .probe = da9052_spi_probe,
+ .remove = __devexit_p(da9052_spi_remove),
+ .id_table = da9052_spi_id,
+ .driver = {
+ .name = "da9052",
+ .bus = &spi_bus_type,
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init da9052_spi_init(void)
+{
+ int ret;
+
+ ret = spi_register_driver(&da9052_spi_driver);
+ if (ret != 0) {
+ pr_err("Failed to register DA9052 SPI driver, %d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+subsys_initcall(da9052_spi_init);
+
+static void __exit da9052_spi_exit(void)
+{
+ spi_unregister_driver(&da9052_spi_driver);
+}
+module_exit(da9052_spi_exit);
+
+MODULE_AUTHOR("David Dajun Chen <dchen@...semi.com>");
+MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");
+MODULE_LICENSE("GPL");
--
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