spi: Freescale STMP driver
Add SPI driver for Freescale STMP 3xxx-based boards [dbrownell@users.sourceforge.net: cleanup sequence, spi_unregister_master] Signed-off-by: dmitry pervushin <dpervushin@embeddedalley.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Kumar Gala <galak@gate.crashing.org> Cc: Timur Tabi <timur@freescale.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
dmitry pervushin
Linus Torvalds
parent
570327d9f4
commit
0644c48672
@ -222,6 +222,12 @@ config SPI_SH_SCI
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help
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SPI driver for SuperH SCI blocks.
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config SPI_STMP3XXX
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tristate "Freescale STMP37xx/378x SPI/SSP controller"
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depends on ARCH_STMP3XXX && SPI_MASTER
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help
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SPI driver for Freescale STMP37xx/378x SoC SSP interface
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config SPI_TXX9
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tristate "Toshiba TXx9 SPI controller"
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depends on GENERIC_GPIO && CPU_TX49XX
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@ -32,6 +32,7 @@ obj-$(CONFIG_SPI_S3C24XX) += spi_s3c24xx.o
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obj-$(CONFIG_SPI_TXX9) += spi_txx9.o
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obj-$(CONFIG_SPI_XILINX) += xilinx_spi.o
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obj-$(CONFIG_SPI_SH_SCI) += spi_sh_sci.o
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obj-$(CONFIG_SPI_STMP3XXX) += spi_stmp.o
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# ... add above this line ...
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# SPI protocol drivers (device/link on bus)
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679
drivers/spi/spi_stmp.c
Normal file
679
drivers/spi/spi_stmp.c
Normal file
@ -0,0 +1,679 @@
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/*
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* Freescale STMP378X SPI master driver
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*
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* Author: dmitry pervushin <dimka@embeddedalley.com>
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*
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* Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
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* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
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*/
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/*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/spi/spi.h>
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#include <linux/err.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/dma-mapping.h>
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#include <linux/delay.h>
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#include <mach/platform.h>
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#include <mach/stmp3xxx.h>
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#include <mach/dma.h>
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#include <mach/regs-ssp.h>
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#include <mach/regs-apbh.h>
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/* 0 means DMA mode(recommended, default), !0 - PIO mode */
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static int pio;
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static int clock;
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/* default timeout for busy waits is 2 seconds */
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#define STMP_SPI_TIMEOUT (2 * HZ)
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struct stmp_spi {
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int id;
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void * __iomem regs; /* vaddr of the control registers */
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int irq, err_irq;
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u32 dma;
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struct stmp3xxx_dma_descriptor d;
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u32 speed_khz;
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u32 saved_timings;
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u32 divider;
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struct clk *clk;
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struct device *master_dev;
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struct work_struct work;
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struct workqueue_struct *workqueue;
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/* lock protects queue access */
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spinlock_t lock;
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struct list_head queue;
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struct completion done;
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};
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#define busy_wait(cond) \
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({ \
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unsigned long end_jiffies = jiffies + STMP_SPI_TIMEOUT; \
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bool succeeded = false; \
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do { \
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if (cond) { \
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succeeded = true; \
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break; \
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} \
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cpu_relax(); \
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} while (time_before(end_jiffies, jiffies)); \
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succeeded; \
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})
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/**
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* stmp_spi_init_hw
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* Initialize the SSP port
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*/
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static int stmp_spi_init_hw(struct stmp_spi *ss)
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{
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int err = 0;
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void *pins = ss->master_dev->platform_data;
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err = stmp3xxx_request_pin_group(pins, dev_name(ss->master_dev));
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if (err)
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goto out;
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ss->clk = clk_get(NULL, "ssp");
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if (IS_ERR(ss->clk)) {
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err = PTR_ERR(ss->clk);
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goto out_free_pins;
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}
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clk_enable(ss->clk);
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stmp3xxx_reset_block(ss->regs, false);
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stmp3xxx_dma_reset_channel(ss->dma);
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return 0;
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out_free_pins:
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stmp3xxx_release_pin_group(pins, dev_name(ss->master_dev));
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out:
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return err;
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}
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static void stmp_spi_release_hw(struct stmp_spi *ss)
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{
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void *pins = ss->master_dev->platform_data;
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if (ss->clk && !IS_ERR(ss->clk)) {
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clk_disable(ss->clk);
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clk_put(ss->clk);
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}
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stmp3xxx_release_pin_group(pins, dev_name(ss->master_dev));
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}
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static int stmp_spi_setup_transfer(struct spi_device *spi,
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struct spi_transfer *t)
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{
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u8 bits_per_word;
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u32 hz;
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struct stmp_spi *ss = spi_master_get_devdata(spi->master);
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u16 rate;
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bits_per_word = spi->bits_per_word;
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if (t && t->bits_per_word)
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bits_per_word = t->bits_per_word;
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/*
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* Calculate speed:
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* - by default, use maximum speed from ssp clk
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* - if device overrides it, use it
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* - if transfer specifies other speed, use transfer's one
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*/
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hz = 1000 * ss->speed_khz / ss->divider;
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if (spi->max_speed_hz)
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hz = min(hz, spi->max_speed_hz);
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if (t && t->speed_hz)
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hz = min(hz, t->speed_hz);
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if (hz == 0) {
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dev_err(&spi->dev, "Cannot continue with zero clock\n");
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return -EINVAL;
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}
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if (bits_per_word != 8) {
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dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n",
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__func__, bits_per_word);
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return -EINVAL;
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}
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dev_dbg(&spi->dev, "Requested clk rate = %uHz, max = %uHz/%d = %uHz\n",
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hz, ss->speed_khz, ss->divider,
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ss->speed_khz * 1000 / ss->divider);
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if (ss->speed_khz * 1000 / ss->divider < hz) {
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dev_err(&spi->dev, "%s, unsupported clock rate %uHz\n",
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__func__, hz);
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return -EINVAL;
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}
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rate = 1000 * ss->speed_khz/ss->divider/hz;
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writel(BF(ss->divider, SSP_TIMING_CLOCK_DIVIDE) |
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BF(rate - 1, SSP_TIMING_CLOCK_RATE),
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HW_SSP_TIMING + ss->regs);
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writel(BF(1 /* mode SPI */, SSP_CTRL1_SSP_MODE) |
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BF(4 /* 8 bits */, SSP_CTRL1_WORD_LENGTH) |
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((spi->mode & SPI_CPOL) ? BM_SSP_CTRL1_POLARITY : 0) |
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((spi->mode & SPI_CPHA) ? BM_SSP_CTRL1_PHASE : 0) |
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(pio ? 0 : BM_SSP_CTRL1_DMA_ENABLE),
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ss->regs + HW_SSP_CTRL1);
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return 0;
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}
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static int stmp_spi_setup(struct spi_device *spi)
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{
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/* spi_setup() does basic checks,
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* stmp_spi_setup_transfer() does more later
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*/
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if (spi->bits_per_word != 8) {
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dev_err(&spi->dev, "%s, unsupported bits_per_word=%d\n",
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__func__, spi->bits_per_word);
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return -EINVAL;
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}
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return 0;
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}
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static inline u32 stmp_spi_cs(unsigned cs)
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{
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return ((cs & 1) ? BM_SSP_CTRL0_WAIT_FOR_CMD : 0) |
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((cs & 2) ? BM_SSP_CTRL0_WAIT_FOR_IRQ : 0);
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}
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static int stmp_spi_txrx_dma(struct stmp_spi *ss, int cs,
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unsigned char *buf, dma_addr_t dma_buf, int len,
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int first, int last, bool write)
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{
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u32 c0 = 0;
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dma_addr_t spi_buf_dma = dma_buf;
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int status = 0;
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enum dma_data_direction dir = write ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
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c0 |= (first ? BM_SSP_CTRL0_LOCK_CS : 0);
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c0 |= (last ? BM_SSP_CTRL0_IGNORE_CRC : 0);
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c0 |= (write ? 0 : BM_SSP_CTRL0_READ);
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c0 |= BM_SSP_CTRL0_DATA_XFER;
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c0 |= stmp_spi_cs(cs);
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c0 |= BF(len, SSP_CTRL0_XFER_COUNT);
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if (!dma_buf)
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spi_buf_dma = dma_map_single(ss->master_dev, buf, len, dir);
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ss->d.command->cmd =
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BF(len, APBH_CHn_CMD_XFER_COUNT) |
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BF(1, APBH_CHn_CMD_CMDWORDS) |
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BM_APBH_CHn_CMD_WAIT4ENDCMD |
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BM_APBH_CHn_CMD_IRQONCMPLT |
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BF(write ? BV_APBH_CHn_CMD_COMMAND__DMA_READ :
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BV_APBH_CHn_CMD_COMMAND__DMA_WRITE,
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APBH_CHn_CMD_COMMAND);
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ss->d.command->pio_words[0] = c0;
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ss->d.command->buf_ptr = spi_buf_dma;
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stmp3xxx_dma_reset_channel(ss->dma);
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stmp3xxx_dma_clear_interrupt(ss->dma);
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stmp3xxx_dma_enable_interrupt(ss->dma);
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init_completion(&ss->done);
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stmp3xxx_dma_go(ss->dma, &ss->d, 1);
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wait_for_completion(&ss->done);
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if (!busy_wait(readl(ss->regs + HW_SSP_CTRL0) & BM_SSP_CTRL0_RUN))
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status = ETIMEDOUT;
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if (!dma_buf)
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dma_unmap_single(ss->master_dev, spi_buf_dma, len, dir);
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return status;
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}
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static inline void stmp_spi_enable(struct stmp_spi *ss)
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{
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stmp3xxx_setl(BM_SSP_CTRL0_LOCK_CS, ss->regs + HW_SSP_CTRL0);
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stmp3xxx_clearl(BM_SSP_CTRL0_IGNORE_CRC, ss->regs + HW_SSP_CTRL0);
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}
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static inline void stmp_spi_disable(struct stmp_spi *ss)
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{
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stmp3xxx_clearl(BM_SSP_CTRL0_LOCK_CS, ss->regs + HW_SSP_CTRL0);
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stmp3xxx_setl(BM_SSP_CTRL0_IGNORE_CRC, ss->regs + HW_SSP_CTRL0);
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}
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static int stmp_spi_txrx_pio(struct stmp_spi *ss, int cs,
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unsigned char *buf, int len,
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bool first, bool last, bool write)
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{
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if (first)
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stmp_spi_enable(ss);
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stmp3xxx_setl(stmp_spi_cs(cs), ss->regs + HW_SSP_CTRL0);
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while (len--) {
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if (last && len <= 0)
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stmp_spi_disable(ss);
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stmp3xxx_clearl(BM_SSP_CTRL0_XFER_COUNT,
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ss->regs + HW_SSP_CTRL0);
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stmp3xxx_setl(1, ss->regs + HW_SSP_CTRL0);
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if (write)
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stmp3xxx_clearl(BM_SSP_CTRL0_READ,
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ss->regs + HW_SSP_CTRL0);
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else
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stmp3xxx_setl(BM_SSP_CTRL0_READ,
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ss->regs + HW_SSP_CTRL0);
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/* Run! */
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stmp3xxx_setl(BM_SSP_CTRL0_RUN, ss->regs + HW_SSP_CTRL0);
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if (!busy_wait(readl(ss->regs + HW_SSP_CTRL0) &
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BM_SSP_CTRL0_RUN))
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break;
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if (write)
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writel(*buf, ss->regs + HW_SSP_DATA);
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/* Set TRANSFER */
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stmp3xxx_setl(BM_SSP_CTRL0_DATA_XFER, ss->regs + HW_SSP_CTRL0);
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if (!write) {
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if (busy_wait((readl(ss->regs + HW_SSP_STATUS) &
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BM_SSP_STATUS_FIFO_EMPTY)))
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break;
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*buf = readl(ss->regs + HW_SSP_DATA) & 0xFF;
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}
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if (!busy_wait(readl(ss->regs + HW_SSP_CTRL0) &
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BM_SSP_CTRL0_RUN))
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break;
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/* advance to the next byte */
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buf++;
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}
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return len < 0 ? 0 : -ETIMEDOUT;
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}
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static int stmp_spi_handle_message(struct stmp_spi *ss, struct spi_message *m)
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{
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bool first, last;
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struct spi_transfer *t, *tmp_t;
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int status = 0;
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int cs;
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cs = m->spi->chip_select;
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list_for_each_entry_safe(t, tmp_t, &m->transfers, transfer_list) {
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first = (&t->transfer_list == m->transfers.next);
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last = (&t->transfer_list == m->transfers.prev);
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if (first || t->speed_hz || t->bits_per_word)
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stmp_spi_setup_transfer(m->spi, t);
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/* reject "not last" transfers which request to change cs */
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if (t->cs_change && !last) {
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dev_err(&m->spi->dev,
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"Message with t->cs_change has been skipped\n");
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continue;
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}
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if (t->tx_buf) {
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status = pio ?
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stmp_spi_txrx_pio(ss, cs, (void *)t->tx_buf,
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t->len, first, last, true) :
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stmp_spi_txrx_dma(ss, cs, (void *)t->tx_buf,
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t->tx_dma, t->len, first, last, true);
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#ifdef DEBUG
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if (t->len < 0x10)
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print_hex_dump_bytes("Tx ",
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DUMP_PREFIX_OFFSET,
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t->tx_buf, t->len);
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else
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pr_debug("Tx: %d bytes\n", t->len);
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#endif
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}
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if (t->rx_buf) {
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status = pio ?
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stmp_spi_txrx_pio(ss, cs, t->rx_buf,
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t->len, first, last, false) :
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stmp_spi_txrx_dma(ss, cs, t->rx_buf,
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t->rx_dma, t->len, first, last, false);
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#ifdef DEBUG
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if (t->len < 0x10)
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print_hex_dump_bytes("Rx ",
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DUMP_PREFIX_OFFSET,
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t->rx_buf, t->len);
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else
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pr_debug("Rx: %d bytes\n", t->len);
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#endif
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}
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if (t->delay_usecs)
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udelay(t->delay_usecs);
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if (status)
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break;
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}
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return status;
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}
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/**
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* stmp_spi_handle - handle messages from the queue
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*/
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static void stmp_spi_handle(struct work_struct *w)
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{
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struct stmp_spi *ss = container_of(w, struct stmp_spi, work);
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unsigned long flags;
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struct spi_message *m;
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spin_lock_irqsave(&ss->lock, flags);
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while (!list_empty(&ss->queue)) {
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m = list_entry(ss->queue.next, struct spi_message, queue);
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list_del_init(&m->queue);
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spin_unlock_irqrestore(&ss->lock, flags);
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m->status = stmp_spi_handle_message(ss, m);
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m->complete(m->context);
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spin_lock_irqsave(&ss->lock, flags);
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}
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spin_unlock_irqrestore(&ss->lock, flags);
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return;
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}
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/**
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* stmp_spi_transfer - perform message transfer.
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* Called indirectly from spi_async, queues all the messages to
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* spi_handle_message.
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* @spi: spi device
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* @m: message to be queued
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*/
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static int stmp_spi_transfer(struct spi_device *spi, struct spi_message *m)
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{
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struct stmp_spi *ss = spi_master_get_devdata(spi->master);
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unsigned long flags;
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m->status = -EINPROGRESS;
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spin_lock_irqsave(&ss->lock, flags);
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list_add_tail(&m->queue, &ss->queue);
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queue_work(ss->workqueue, &ss->work);
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spin_unlock_irqrestore(&ss->lock, flags);
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return 0;
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}
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static irqreturn_t stmp_spi_irq(int irq, void *dev_id)
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{
|
||||
struct stmp_spi *ss = dev_id;
|
||||
|
||||
stmp3xxx_dma_clear_interrupt(ss->dma);
|
||||
complete(&ss->done);
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static irqreturn_t stmp_spi_irq_err(int irq, void *dev_id)
|
||||
{
|
||||
struct stmp_spi *ss = dev_id;
|
||||
u32 c1, st;
|
||||
|
||||
c1 = readl(ss->regs + HW_SSP_CTRL1);
|
||||
st = readl(ss->regs + HW_SSP_STATUS);
|
||||
dev_err(ss->master_dev, "%s: status = 0x%08X, c1 = 0x%08X\n",
|
||||
__func__, st, c1);
|
||||
stmp3xxx_clearl(c1 & 0xCCCC0000, ss->regs + HW_SSP_CTRL1);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int __devinit stmp_spi_probe(struct platform_device *dev)
|
||||
{
|
||||
int err = 0;
|
||||
struct spi_master *master;
|
||||
struct stmp_spi *ss;
|
||||
struct resource *r;
|
||||
|
||||
master = spi_alloc_master(&dev->dev, sizeof(struct stmp_spi));
|
||||
if (master == NULL) {
|
||||
err = -ENOMEM;
|
||||
goto out0;
|
||||
}
|
||||
master->flags = SPI_MASTER_HALF_DUPLEX;
|
||||
|
||||
ss = spi_master_get_devdata(master);
|
||||
platform_set_drvdata(dev, master);
|
||||
|
||||
/* Get resources(memory, IRQ) associated with the device */
|
||||
r = platform_get_resource(dev, IORESOURCE_MEM, 0);
|
||||
if (r == NULL) {
|
||||
err = -ENODEV;
|
||||
goto out_put_master;
|
||||
}
|
||||
ss->regs = ioremap(r->start, resource_size(r));
|
||||
if (!ss->regs) {
|
||||
err = -EINVAL;
|
||||
goto out_put_master;
|
||||
}
|
||||
|
||||
ss->master_dev = &dev->dev;
|
||||
ss->id = dev->id;
|
||||
|
||||
INIT_WORK(&ss->work, stmp_spi_handle);
|
||||
INIT_LIST_HEAD(&ss->queue);
|
||||
spin_lock_init(&ss->lock);
|
||||
|
||||
ss->workqueue = create_singlethread_workqueue(dev_name(&dev->dev));
|
||||
if (!ss->workqueue) {
|
||||
err = -ENXIO;
|
||||
goto out_put_master;
|
||||
}
|
||||
master->transfer = stmp_spi_transfer;
|
||||
master->setup = stmp_spi_setup;
|
||||
|
||||
/* the spi->mode bits understood by this driver: */
|
||||
master->mode_bits = SPI_CPOL | SPI_CPHA;
|
||||
|
||||
ss->irq = platform_get_irq(dev, 0);
|
||||
if (ss->irq < 0) {
|
||||
err = ss->irq;
|
||||
goto out_put_master;
|
||||
}
|
||||
ss->err_irq = platform_get_irq(dev, 1);
|
||||
if (ss->err_irq < 0) {
|
||||
err = ss->err_irq;
|
||||
goto out_put_master;
|
||||
}
|
||||
|
||||
r = platform_get_resource(dev, IORESOURCE_DMA, 0);
|
||||
if (r == NULL) {
|
||||
err = -ENODEV;
|
||||
goto out_put_master;
|
||||
}
|
||||
|
||||
ss->dma = r->start;
|
||||
err = stmp3xxx_dma_request(ss->dma, &dev->dev, dev_name(&dev->dev));
|
||||
if (err)
|
||||
goto out_put_master;
|
||||
|
||||
err = stmp3xxx_dma_allocate_command(ss->dma, &ss->d);
|
||||
if (err)
|
||||
goto out_free_dma;
|
||||
|
||||
master->bus_num = dev->id;
|
||||
master->num_chipselect = 1;
|
||||
|
||||
/* SPI controller initializations */
|
||||
err = stmp_spi_init_hw(ss);
|
||||
if (err) {
|
||||
dev_dbg(&dev->dev, "cannot initialize hardware\n");
|
||||
goto out_free_dma_desc;
|
||||
}
|
||||
|
||||
if (clock) {
|
||||
dev_info(&dev->dev, "clock rate forced to %d\n", clock);
|
||||
clk_set_rate(ss->clk, clock);
|
||||
}
|
||||
ss->speed_khz = clk_get_rate(ss->clk);
|
||||
ss->divider = 2;
|
||||
dev_info(&dev->dev, "max possible speed %d = %ld/%d kHz\n",
|
||||
ss->speed_khz, clk_get_rate(ss->clk), ss->divider);
|
||||
|
||||
/* Register for SPI interrupt */
|
||||
err = request_irq(ss->irq, stmp_spi_irq, 0,
|
||||
dev_name(&dev->dev), ss);
|
||||
if (err) {
|
||||
dev_dbg(&dev->dev, "request_irq failed, %d\n", err);
|
||||
goto out_release_hw;
|
||||
}
|
||||
|
||||
/* ..and shared interrupt for all SSP controllers */
|
||||
err = request_irq(ss->err_irq, stmp_spi_irq_err, IRQF_SHARED,
|
||||
dev_name(&dev->dev), ss);
|
||||
if (err) {
|
||||
dev_dbg(&dev->dev, "request_irq(error) failed, %d\n", err);
|
||||
goto out_free_irq;
|
||||
}
|
||||
|
||||
err = spi_register_master(master);
|
||||
if (err) {
|
||||
dev_dbg(&dev->dev, "cannot register spi master, %d\n", err);
|
||||
goto out_free_irq_2;
|
||||
}
|
||||
dev_info(&dev->dev, "at (mapped) 0x%08X, irq=%d, bus %d, %s mode\n",
|
||||
(u32)ss->regs, ss->irq, master->bus_num,
|
||||
pio ? "PIO" : "DMA");
|
||||
return 0;
|
||||
|
||||
out_free_irq_2:
|
||||
free_irq(ss->err_irq, ss);
|
||||
out_free_irq:
|
||||
free_irq(ss->irq, ss);
|
||||
out_free_dma_desc:
|
||||
stmp3xxx_dma_free_command(ss->dma, &ss->d);
|
||||
out_free_dma:
|
||||
stmp3xxx_dma_release(ss->dma);
|
||||
out_release_hw:
|
||||
stmp_spi_release_hw(ss);
|
||||
out_put_master:
|
||||
if (ss->workqueue)
|
||||
destroy_workqueue(ss->workqueue);
|
||||
if (ss->regs)
|
||||
iounmap(ss->regs);
|
||||
platform_set_drvdata(dev, NULL);
|
||||
spi_master_put(master);
|
||||
out0:
|
||||
return err;
|
||||
}
|
||||
|
||||
static int __devexit stmp_spi_remove(struct platform_device *dev)
|
||||
{
|
||||
struct stmp_spi *ss;
|
||||
struct spi_master *master;
|
||||
|
||||
master = platform_get_drvdata(dev);
|
||||
if (master == NULL)
|
||||
goto out0;
|
||||
ss = spi_master_get_devdata(master);
|
||||
|
||||
spi_unregister_master(master);
|
||||
|
||||
free_irq(ss->err_irq, ss);
|
||||
free_irq(ss->irq, ss);
|
||||
stmp3xxx_dma_free_command(ss->dma, &ss->d);
|
||||
stmp3xxx_dma_release(ss->dma);
|
||||
stmp_spi_release_hw(ss);
|
||||
destroy_workqueue(ss->workqueue);
|
||||
iounmap(ss->regs);
|
||||
spi_master_put(master);
|
||||
platform_set_drvdata(dev, NULL);
|
||||
out0:
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int stmp_spi_suspend(struct platform_device *pdev, pm_message_t pmsg)
|
||||
{
|
||||
struct stmp_spi *ss;
|
||||
struct spi_master *master;
|
||||
|
||||
master = platform_get_drvdata(pdev);
|
||||
ss = spi_master_get_devdata(master);
|
||||
|
||||
ss->saved_timings = readl(HW_SSP_TIMING + ss->regs);
|
||||
clk_disable(ss->clk);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int stmp_spi_resume(struct platform_device *pdev)
|
||||
{
|
||||
struct stmp_spi *ss;
|
||||
struct spi_master *master;
|
||||
|
||||
master = platform_get_drvdata(pdev);
|
||||
ss = spi_master_get_devdata(master);
|
||||
|
||||
clk_enable(ss->clk);
|
||||
stmp3xxx_reset_block(ss->regs, false);
|
||||
writel(ss->saved_timings, ss->regs + HW_SSP_TIMING);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#else
|
||||
#define stmp_spi_suspend NULL
|
||||
#define stmp_spi_resume NULL
|
||||
#endif
|
||||
|
||||
static struct platform_driver stmp_spi_driver = {
|
||||
.probe = stmp_spi_probe,
|
||||
.remove = __devexit_p(stmp_spi_remove),
|
||||
.driver = {
|
||||
.name = "stmp3xxx_ssp",
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.suspend = stmp_spi_suspend,
|
||||
.resume = stmp_spi_resume,
|
||||
};
|
||||
|
||||
static int __init stmp_spi_init(void)
|
||||
{
|
||||
return platform_driver_register(&stmp_spi_driver);
|
||||
}
|
||||
|
||||
static void __exit stmp_spi_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&stmp_spi_driver);
|
||||
}
|
||||
|
||||
module_init(stmp_spi_init);
|
||||
module_exit(stmp_spi_exit);
|
||||
module_param(pio, int, S_IRUGO);
|
||||
module_param(clock, int, S_IRUGO);
|
||||
MODULE_AUTHOR("dmitry pervushin <dpervushin@embeddedalley.com>");
|
||||
MODULE_DESCRIPTION("STMP3xxx SPI/SSP driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user