Commit 45fae7de authored by Peter Korsgaard's avatar Peter Korsgaard Committed by Grant Likely
Browse files

spi: remove obsolete spi-s3c24xx-gpio driver 



It was equivalent to spi-gpio, and there's no longer any in-tree users
of it, so get rid of it.

Signed-off-by: default avatarPeter Korsgaard <jacmet@sunsite.dk>
Acked-by: default avatarBen Dooks <ben-linux@fluff.org>
Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
parent 947b35d5

drivers/spi/Kconfig

+0 −10
Original line number Diff line number Diff line
@@ -313,16 +313,6 @@ config SPI_S3C24XX_FIQ 
	  no free DMA channels, or when doing transfers that required both

	  TX and RX data paths.



config SPI_S3C24XX_GPIO

	tristate "Samsung S3C24XX series SPI by GPIO"

	depends on ARCH_S3C2410 && EXPERIMENTAL

	select SPI_BITBANG

	help

	  SPI driver for Samsung S3C24XX series ARM SoCs using

	  GPIO lines to provide the SPI bus. This can be used where

	  the inbuilt hardware cannot provide the transfer mode, or

	  where the board is using non hardware connected pins.



config SPI_S3C64XX

	tristate "Samsung S3C64XX series type SPI"

	depends on (ARCH_S3C64XX || ARCH_S5P64X0)

drivers/spi/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -44,7 +44,6 @@ obj-$(CONFIG_SPI_PL022) += spi-pl022.o 
obj-$(CONFIG_SPI_PPC4xx)		+= spi-ppc4xx.o

obj-$(CONFIG_SPI_PXA2XX)		+= spi-pxa2xx.o

obj-$(CONFIG_SPI_PXA2XX_PCI)		+= spi-pxa2xx-pci.o

obj-$(CONFIG_SPI_S3C24XX_GPIO)		+= spi-s3c24xx-gpio.o

obj-$(CONFIG_SPI_S3C24XX)		+= spi-s3c24xx-hw.o

spi-s3c24xx-hw-y			:= spi-s3c24xx.o

spi-s3c24xx-hw-$(CONFIG_SPI_S3C24XX_FIQ) += spi-s3c24xx-fiq.o

drivers/spi/spi-s3c24xx-gpio.c

deleted100644 → 0
+0 −200
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2006 Ben Dooks

 * Copyright (c) 2006 Simtec Electronics

 *

 * S3C24XX GPIO based SPI driver

 *

 * 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.

 *

*/



#include <linux/kernel.h>

#include <linux/init.h>

#include <linux/delay.h>

#include <linux/spinlock.h>

#include <linux/workqueue.h>

#include <linux/platform_device.h>

#include <linux/gpio.h>



#include <linux/spi/spi.h>

#include <linux/spi/spi_bitbang.h>



#include <mach/regs-gpio.h>

#include <mach/spi-gpio.h>

#include <mach/hardware.h>



struct s3c2410_spigpio {

	struct spi_bitbang		 bitbang;



	struct s3c2410_spigpio_info	*info;

	struct platform_device		*dev;

};



static inline struct s3c2410_spigpio *spidev_to_sg(struct spi_device *spi)

{

	return spi_master_get_devdata(spi->master);

}



static inline void setsck(struct spi_device *dev, int on)

{

	struct s3c2410_spigpio *sg = spidev_to_sg(dev);

	s3c2410_gpio_setpin(sg->info->pin_clk, on ? 1 : 0);

}



static inline void setmosi(struct spi_device *dev, int on)

{

	struct s3c2410_spigpio *sg = spidev_to_sg(dev);

	s3c2410_gpio_setpin(sg->info->pin_mosi, on ? 1 : 0);

}



static inline u32 getmiso(struct spi_device *dev)

{

	struct s3c2410_spigpio *sg = spidev_to_sg(dev);

	return s3c2410_gpio_getpin(sg->info->pin_miso) ? 1 : 0;

}



#define spidelay(x) ndelay(x)



#include "spi-bitbang-txrx.h"





static u32 s3c2410_spigpio_txrx_mode0(struct spi_device *spi,

				      unsigned nsecs, u32 word, u8 bits)

{

	return bitbang_txrx_be_cpha0(spi, nsecs, 0, 0, word, bits);

}



static u32 s3c2410_spigpio_txrx_mode1(struct spi_device *spi,

				      unsigned nsecs, u32 word, u8 bits)

{

	return bitbang_txrx_be_cpha1(spi, nsecs, 0, 0, word, bits);

}



static u32 s3c2410_spigpio_txrx_mode2(struct spi_device *spi,

				      unsigned nsecs, u32 word, u8 bits)

{

	return bitbang_txrx_be_cpha0(spi, nsecs, 1, 0, word, bits);

}



static u32 s3c2410_spigpio_txrx_mode3(struct spi_device *spi,

				      unsigned nsecs, u32 word, u8 bits)

{

	return bitbang_txrx_be_cpha1(spi, nsecs, 1, 0, word, bits);

}





static void s3c2410_spigpio_chipselect(struct spi_device *dev, int value)

{

	struct s3c2410_spigpio *sg = spidev_to_sg(dev);



	if (sg->info && sg->info->chip_select)

		(sg->info->chip_select)(sg->info, value);

}



static int s3c2410_spigpio_probe(struct platform_device *dev)

{

	struct s3c2410_spigpio_info *info;

	struct spi_master	*master;

	struct s3c2410_spigpio  *sp;

	int ret;



	master = spi_alloc_master(&dev->dev, sizeof(struct s3c2410_spigpio));

	if (master == NULL) {

		dev_err(&dev->dev, "failed to allocate spi master\n");

		ret = -ENOMEM;

		goto err;

	}



	sp = spi_master_get_devdata(master);



	platform_set_drvdata(dev, sp);



	/* copy in the plkatform data */

	info = sp->info = dev->dev.platform_data;



	/* setup spi bitbang adaptor */

	sp->bitbang.master = spi_master_get(master);

	sp->bitbang.master->bus_num = info->bus_num;

	sp->bitbang.master->num_chipselect = info->num_chipselect;

	sp->bitbang.chipselect = s3c2410_spigpio_chipselect;



	sp->bitbang.txrx_word[SPI_MODE_0] = s3c2410_spigpio_txrx_mode0;

	sp->bitbang.txrx_word[SPI_MODE_1] = s3c2410_spigpio_txrx_mode1;

	sp->bitbang.txrx_word[SPI_MODE_2] = s3c2410_spigpio_txrx_mode2;

	sp->bitbang.txrx_word[SPI_MODE_3] = s3c2410_spigpio_txrx_mode3;



	/* set state of spi pins, always assume that the clock is

	 * available, but do check the MOSI and MISO. */

	s3c2410_gpio_setpin(info->pin_clk, 0);

	s3c2410_gpio_cfgpin(info->pin_clk, S3C2410_GPIO_OUTPUT);



	if (info->pin_mosi < S3C2410_GPH10) {

		s3c2410_gpio_setpin(info->pin_mosi, 0);

		s3c2410_gpio_cfgpin(info->pin_mosi, S3C2410_GPIO_OUTPUT);

	}



	if (info->pin_miso != S3C2410_GPA0 && info->pin_miso < S3C2410_GPH10)

		s3c2410_gpio_cfgpin(info->pin_miso, S3C2410_GPIO_INPUT);



	ret = spi_bitbang_start(&sp->bitbang);

	if (ret)

		goto err_no_bitbang;



	return 0;



 err_no_bitbang:

	spi_master_put(sp->bitbang.master);

 err:

	return ret;



}



static int s3c2410_spigpio_remove(struct platform_device *dev)

{

	struct s3c2410_spigpio *sp = platform_get_drvdata(dev);



	spi_bitbang_stop(&sp->bitbang);

	spi_master_put(sp->bitbang.master);



	return 0;

}



/* all gpio should be held over suspend/resume, so we should

 * not need to deal with this

*/



#define s3c2410_spigpio_suspend NULL

#define s3c2410_spigpio_resume NULL



/* work with hotplug and coldplug */

MODULE_ALIAS("platform:spi_s3c24xx_gpio");



static struct platform_driver s3c2410_spigpio_drv = {

	.probe		= s3c2410_spigpio_probe,

        .remove		= s3c2410_spigpio_remove,

        .suspend	= s3c2410_spigpio_suspend,

        .resume		= s3c2410_spigpio_resume,

        .driver		= {

		.name	= "spi_s3c24xx_gpio",

		.owner	= THIS_MODULE,

        },

};



static int __init s3c2410_spigpio_init(void)

{

        return platform_driver_register(&s3c2410_spigpio_drv);

}



static void __exit s3c2410_spigpio_exit(void)

{

        platform_driver_unregister(&s3c2410_spigpio_drv);

}



module_init(s3c2410_spigpio_init);

module_exit(s3c2410_spigpio_exit);



MODULE_DESCRIPTION("S3C24XX SPI Driver");

MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");

MODULE_LICENSE("GPL");

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