diff options
Diffstat (limited to 'drivers/mfd/ab8500-spi.c')
| -rw-r--r-- | drivers/mfd/ab8500-spi.c | 143 | 
1 files changed, 0 insertions, 143 deletions
diff --git a/drivers/mfd/ab8500-spi.c b/drivers/mfd/ab8500-spi.c deleted file mode 100644 index b1653421edb..00000000000 --- a/drivers/mfd/ab8500-spi.c +++ /dev/null @@ -1,143 +0,0 @@ -/* - * Copyright (C) ST-Ericsson SA 2010 - * - * License Terms: GNU General Public License v2 - * Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> - */ - -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/platform_device.h> -#include <linux/spi/spi.h> -#include <linux/mfd/ab8500.h> - -/* - * This funtion writes to any AB8500 registers using - * SPI protocol &  before it writes it packs the data - * in the below 24 bit frame format - * - *	 *|------------------------------------| - *	 *| 23|22...18|17.......10|9|8|7......0| - *	 *| r/w  bank       adr          data  | - *	 * ------------------------------------ - * - * This function shouldn't be called from interrupt - * context - */ -static int ab8500_spi_write(struct ab8500 *ab8500, u16 addr, u8 data) -{ -	struct spi_device *spi = container_of(ab8500->dev, struct spi_device, -					      dev); -	unsigned long spi_data = addr << 10 | data; -	struct spi_transfer xfer; -	struct spi_message msg; - -	ab8500->tx_buf[0] = spi_data; -	ab8500->rx_buf[0] = 0; - -	xfer.tx_buf	= ab8500->tx_buf; -	xfer.rx_buf	= NULL; -	xfer.len	= sizeof(unsigned long); - -	spi_message_init(&msg); -	spi_message_add_tail(&xfer, &msg); - -	return spi_sync(spi, &msg); -} - -static int ab8500_spi_read(struct ab8500 *ab8500, u16 addr) -{ -	struct spi_device *spi = container_of(ab8500->dev, struct spi_device, -					      dev); -	unsigned long spi_data = 1 << 23 | addr << 10; -	struct spi_transfer xfer; -	struct spi_message msg; -	int ret; - -	ab8500->tx_buf[0] = spi_data; -	ab8500->rx_buf[0] = 0; - -	xfer.tx_buf	= ab8500->tx_buf; -	xfer.rx_buf	= ab8500->rx_buf; -	xfer.len	= sizeof(unsigned long); - -	spi_message_init(&msg); -	spi_message_add_tail(&xfer, &msg); - -	ret = spi_sync(spi, &msg); -	if (!ret) -		/* -		 * Only the 8 lowermost bytes are -		 * defined with value, the rest may -		 * vary depending on chip/board noise. -		 */ -		ret = ab8500->rx_buf[0] & 0xFFU; - -	return ret; -} - -static int __devinit ab8500_spi_probe(struct spi_device *spi) -{ -	struct ab8500 *ab8500; -	int ret; - -	spi->bits_per_word = 24; -	ret = spi_setup(spi); -	if (ret < 0) -		return ret; - -	ab8500 = kzalloc(sizeof *ab8500, GFP_KERNEL); -	if (!ab8500) -		return -ENOMEM; - -	ab8500->dev = &spi->dev; -	ab8500->irq = spi->irq; - -	ab8500->read = ab8500_spi_read; -	ab8500->write = ab8500_spi_write; - -	spi_set_drvdata(spi, ab8500); - -	ret = ab8500_init(ab8500); -	if (ret) -		kfree(ab8500); - -	return ret; -} - -static int __devexit ab8500_spi_remove(struct spi_device *spi) -{ -	struct ab8500 *ab8500 = spi_get_drvdata(spi); - -	ab8500_exit(ab8500); -	kfree(ab8500); - -	return 0; -} - -static struct spi_driver ab8500_spi_driver = { -	.driver = { -		.name = "ab8500-spi", -		.owner = THIS_MODULE, -	}, -	.probe	= ab8500_spi_probe, -	.remove	= __devexit_p(ab8500_spi_remove) -}; - -static int __init ab8500_spi_init(void) -{ -	return spi_register_driver(&ab8500_spi_driver); -} -subsys_initcall(ab8500_spi_init); - -static void __exit ab8500_spi_exit(void) -{ -	spi_unregister_driver(&ab8500_spi_driver); -} -module_exit(ab8500_spi_exit); - -MODULE_AUTHOR("Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com"); -MODULE_DESCRIPTION("AB8500 SPI"); -MODULE_LICENSE("GPL v2");  | 
