mirror of https://gitee.com/openkylin/linux.git
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: Peter Korsgaard <jacmet@sunsite.dk> Acked-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
This commit is contained in:
Peter Korsgaard
Grant Likely
parent
947b35d52d
commit
45fae7def6
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@ -313,16 +313,6 @@ config SPI_S3C24XX_FIQ
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no free DMA channels, or when doing transfers that required both
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TX and RX data paths.
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config SPI_S3C24XX_GPIO
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tristate "Samsung S3C24XX series SPI by GPIO"
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depends on ARCH_S3C2410 && EXPERIMENTAL
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select SPI_BITBANG
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help
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SPI driver for Samsung S3C24XX series ARM SoCs using
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GPIO lines to provide the SPI bus. This can be used where
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the inbuilt hardware cannot provide the transfer mode, or
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where the board is using non hardware connected pins.
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config SPI_S3C64XX
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tristate "Samsung S3C64XX series type SPI"
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depends on (ARCH_S3C64XX || ARCH_S5P64X0)
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@ -44,7 +44,6 @@ obj-$(CONFIG_SPI_PL022) += spi-pl022.o
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obj-$(CONFIG_SPI_PPC4xx) += spi-ppc4xx.o
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obj-$(CONFIG_SPI_PXA2XX) += spi-pxa2xx.o
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obj-$(CONFIG_SPI_PXA2XX_PCI) += spi-pxa2xx-pci.o
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obj-$(CONFIG_SPI_S3C24XX_GPIO) += spi-s3c24xx-gpio.o
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obj-$(CONFIG_SPI_S3C24XX) += spi-s3c24xx-hw.o
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spi-s3c24xx-hw-y := spi-s3c24xx.o
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spi-s3c24xx-hw-$(CONFIG_SPI_S3C24XX_FIQ) += spi-s3c24xx-fiq.o
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@ -1,200 +0,0 @@
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/*
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* Copyright (c) 2006 Ben Dooks
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* Copyright (c) 2006 Simtec Electronics
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*
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* S3C24XX GPIO based SPI driver
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/spinlock.h>
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#include <linux/workqueue.h>
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#include <linux/platform_device.h>
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#include <linux/gpio.h>
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#include <linux/spi/spi.h>
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#include <linux/spi/spi_bitbang.h>
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#include <mach/regs-gpio.h>
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#include <mach/spi-gpio.h>
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#include <mach/hardware.h>
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struct s3c2410_spigpio {
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struct spi_bitbang bitbang;
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struct s3c2410_spigpio_info *info;
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struct platform_device *dev;
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};
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static inline struct s3c2410_spigpio *spidev_to_sg(struct spi_device *spi)
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{
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return spi_master_get_devdata(spi->master);
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}
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static inline void setsck(struct spi_device *dev, int on)
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{
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struct s3c2410_spigpio *sg = spidev_to_sg(dev);
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s3c2410_gpio_setpin(sg->info->pin_clk, on ? 1 : 0);
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}
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static inline void setmosi(struct spi_device *dev, int on)
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{
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struct s3c2410_spigpio *sg = spidev_to_sg(dev);
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s3c2410_gpio_setpin(sg->info->pin_mosi, on ? 1 : 0);
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}
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static inline u32 getmiso(struct spi_device *dev)
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{
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struct s3c2410_spigpio *sg = spidev_to_sg(dev);
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return s3c2410_gpio_getpin(sg->info->pin_miso) ? 1 : 0;
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}
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#define spidelay(x) ndelay(x)
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#include "spi-bitbang-txrx.h"
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static u32 s3c2410_spigpio_txrx_mode0(struct spi_device *spi,
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unsigned nsecs, u32 word, u8 bits)
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{
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return bitbang_txrx_be_cpha0(spi, nsecs, 0, 0, word, bits);
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}
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static u32 s3c2410_spigpio_txrx_mode1(struct spi_device *spi,
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unsigned nsecs, u32 word, u8 bits)
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{
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return bitbang_txrx_be_cpha1(spi, nsecs, 0, 0, word, bits);
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}
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static u32 s3c2410_spigpio_txrx_mode2(struct spi_device *spi,
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unsigned nsecs, u32 word, u8 bits)
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{
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return bitbang_txrx_be_cpha0(spi, nsecs, 1, 0, word, bits);
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}
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static u32 s3c2410_spigpio_txrx_mode3(struct spi_device *spi,
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unsigned nsecs, u32 word, u8 bits)
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{
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return bitbang_txrx_be_cpha1(spi, nsecs, 1, 0, word, bits);
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}
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static void s3c2410_spigpio_chipselect(struct spi_device *dev, int value)
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{
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struct s3c2410_spigpio *sg = spidev_to_sg(dev);
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if (sg->info && sg->info->chip_select)
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(sg->info->chip_select)(sg->info, value);
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}
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static int s3c2410_spigpio_probe(struct platform_device *dev)
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{
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struct s3c2410_spigpio_info *info;
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struct spi_master *master;
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struct s3c2410_spigpio *sp;
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int ret;
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master = spi_alloc_master(&dev->dev, sizeof(struct s3c2410_spigpio));
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if (master == NULL) {
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dev_err(&dev->dev, "failed to allocate spi master\n");
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ret = -ENOMEM;
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goto err;
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}
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sp = spi_master_get_devdata(master);
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platform_set_drvdata(dev, sp);
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/* copy in the plkatform data */
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info = sp->info = dev->dev.platform_data;
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/* setup spi bitbang adaptor */
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sp->bitbang.master = spi_master_get(master);
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sp->bitbang.master->bus_num = info->bus_num;
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sp->bitbang.master->num_chipselect = info->num_chipselect;
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sp->bitbang.chipselect = s3c2410_spigpio_chipselect;
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sp->bitbang.txrx_word[SPI_MODE_0] = s3c2410_spigpio_txrx_mode0;
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sp->bitbang.txrx_word[SPI_MODE_1] = s3c2410_spigpio_txrx_mode1;
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sp->bitbang.txrx_word[SPI_MODE_2] = s3c2410_spigpio_txrx_mode2;
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sp->bitbang.txrx_word[SPI_MODE_3] = s3c2410_spigpio_txrx_mode3;
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/* set state of spi pins, always assume that the clock is
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* available, but do check the MOSI and MISO. */
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s3c2410_gpio_setpin(info->pin_clk, 0);
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s3c2410_gpio_cfgpin(info->pin_clk, S3C2410_GPIO_OUTPUT);
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if (info->pin_mosi < S3C2410_GPH10) {
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s3c2410_gpio_setpin(info->pin_mosi, 0);
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s3c2410_gpio_cfgpin(info->pin_mosi, S3C2410_GPIO_OUTPUT);
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}
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if (info->pin_miso != S3C2410_GPA0 && info->pin_miso < S3C2410_GPH10)
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s3c2410_gpio_cfgpin(info->pin_miso, S3C2410_GPIO_INPUT);
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ret = spi_bitbang_start(&sp->bitbang);
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if (ret)
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goto err_no_bitbang;
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return 0;
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err_no_bitbang:
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spi_master_put(sp->bitbang.master);
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err:
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return ret;
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}
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static int s3c2410_spigpio_remove(struct platform_device *dev)
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{
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struct s3c2410_spigpio *sp = platform_get_drvdata(dev);
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spi_bitbang_stop(&sp->bitbang);
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spi_master_put(sp->bitbang.master);
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return 0;
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}
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/* all gpio should be held over suspend/resume, so we should
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* not need to deal with this
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*/
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#define s3c2410_spigpio_suspend NULL
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#define s3c2410_spigpio_resume NULL
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/* work with hotplug and coldplug */
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MODULE_ALIAS("platform:spi_s3c24xx_gpio");
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static struct platform_driver s3c2410_spigpio_drv = {
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.probe = s3c2410_spigpio_probe,
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.remove = s3c2410_spigpio_remove,
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.suspend = s3c2410_spigpio_suspend,
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.resume = s3c2410_spigpio_resume,
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.driver = {
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.name = "spi_s3c24xx_gpio",
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.owner = THIS_MODULE,
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},
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};
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static int __init s3c2410_spigpio_init(void)
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{
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return platform_driver_register(&s3c2410_spigpio_drv);
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}
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static void __exit s3c2410_spigpio_exit(void)
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{
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platform_driver_unregister(&s3c2410_spigpio_drv);
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}
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module_init(s3c2410_spigpio_init);
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module_exit(s3c2410_spigpio_exit);
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MODULE_DESCRIPTION("S3C24XX SPI Driver");
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MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
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MODULE_LICENSE("GPL");
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