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@diasemi.com Signed-off-by: Ashish Jangam ashish.jangam@kpitcummins.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@diasemi.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@diasemi.com"); +MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC"); +MODULE_LICENSE("GPL");