C++ spi_bitbang_stop函数代码示例

static void butterfly_detach(struct parport *p)
{
	struct butterfly	*pp;
	int			status;

	/* FIXME this global is ugly ... but, how to quickly get from
	 * the parport to the "struct butterfly" associated with it?
	 * "old school" driver-internal device lists?
	 */
	if (!butterfly || butterfly->port != p)
		return;
	pp = butterfly;
	butterfly = NULL;

	/* stop() unregisters child devices too */
	status = spi_bitbang_stop(&pp->bitbang);

	/* turn off VCC */
	parport_write_data(pp->port, 0);
	msleep(10);

	parport_release(pp->pd);
	parport_unregister_device(pp->pd);

	(void) spi_master_put(pp->bitbang.master);
}

static int __devexit spi_imx_remove(struct platform_device *pdev)
{
	struct spi_master *master = platform_get_drvdata(pdev);
	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	struct spi_imx_data *spi_imx = spi_master_get_devdata(master);
	int i;

	spi_bitbang_stop(&spi_imx->bitbang);

	writel(0, spi_imx->base + MXC_CSPICTRL);
	clk_disable(spi_imx->clk);
	clk_put(spi_imx->clk);
	free_irq(spi_imx->irq, spi_imx);
	iounmap(spi_imx->base);

	for (i = 0; i < master->num_chipselect; i++)
		if (spi_imx->chipselect[i] >= 0)
			gpio_free(spi_imx->chipselect[i]);

	spi_master_put(master);

	release_mem_region(res->start, resource_size(res));

	platform_set_drvdata(pdev, NULL);

	return 0;
}

/**
 * davinci_spi_remove - remove function for SPI Master Controller
 * @dev: platform_device structure which contains plateform specific data
 *
 * This function will do the reverse action of davinci_spi_probe function
 * It will free the IRQ and SPI controller's memory region.
 * It will also call spi_bitbang_stop to destroy the work queue which was
 * created by spi_bitbang_start.
 */
static int __devexit davinci_spi_remove(struct device *d)
{
	struct platform_device *dev =
		container_of(d, struct platform_device, dev);
	struct davinci_spi *davinci_spi;
	struct spi_master *master;
	struct davinci_spi_platform_data *pdata = dev->dev.platform_data;

	master = dev_get_drvdata(&(dev)->dev);
	davinci_spi = spi_master_get_devdata(master);

	spi_bitbang_stop(&davinci_spi->bitbang);

	kfree(davinci_spi->dma_channels);
	clk_disable(pdata->clk_info);
	clk_put(pdata->clk_info);
	pdata->clk_info = NULL;
	spi_master_put(master);
	kfree(davinci_spi->tmp_buf);
	free_irq(davinci_spi->irq, davinci_spi);
	iounmap(davinci_spi->base);
	release_mem_region(davinci_spi->pbase, davinci_spi->region_size);

	return 0;
}

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;
}

static int s3c24xx_spi_remove(struct platform_device *dev)
{
	struct s3c24xx_spi *hw = platform_get_drvdata(dev);

	spi_bitbang_stop(&hw->bitbang);
	clk_disable(hw->clk);
	spi_master_put(hw->master);
	return 0;
}

static int dspi_remove(struct platform_device *pdev)
{
	struct fsl_dspi *dspi = platform_get_drvdata(pdev);

	/* Disconnect from the SPI framework */
	spi_bitbang_stop(&dspi->bitbang);
	spi_master_put(dspi->bitbang.master);

	return 0;
}

static int ath79_spi_remove(struct platform_device *pdev)
{
	struct ath79_spi *sp = platform_get_drvdata(pdev);

	spi_bitbang_stop(&sp->bitbang);
	ath79_spi_disable(sp);
	clk_disable(sp->clk);
	spi_master_put(sp->bitbang.master);

	return 0;
}

static int ar71xx_spi_remove(struct platform_device *pdev)
{
	struct ar71xx_spi *sp = platform_get_drvdata(pdev);

	spi_bitbang_stop(&sp->bitbang);
	iounmap(sp->base);
	platform_set_drvdata(pdev, NULL);
	spi_master_put(sp->bitbang.master);

	return 0;
}

static void __ath79_spi_remove(struct platform_device *pdev)
{
	struct ath79_spi *sp = platform_get_drvdata(pdev);

	spi_bitbang_stop(&sp->bitbang);
	ath79_spi_disable(sp);
	clk_disable(sp->clk);
	clk_put(sp->clk);
	iounmap(sp->base);
	platform_set_drvdata(pdev, NULL);
	spi_master_put(sp->bitbang.master);
}

static int tiny_spi_remove(struct platform_device *pdev)
{
	struct tiny_spi *hw = platform_get_drvdata(pdev);
	struct spi_master *master = hw->bitbang.master;
	unsigned int i;

	spi_bitbang_stop(&hw->bitbang);
	for (i = 0; i < hw->gpio_cs_count; i++)
		gpio_free(hw->gpio_cs[i]);
	spi_master_put(master);
	return 0;
}

static int dspi_remove(struct platform_device *pdev)
{
	struct spi_master *master = platform_get_drvdata(pdev);
	struct fsl_dspi *dspi = spi_master_get_devdata(master);

	/* Disconnect from the SPI framework */
	spi_bitbang_stop(&dspi->bitbang);
	clk_disable_unprepare(dspi->clk);
	spi_master_put(dspi->bitbang.master);

	return 0;
}

void xilinx_spi_deinit(struct spi_master *master)
{
	struct xilinx_spi *xspi;

	xspi = spi_master_get_devdata(master);

	spi_bitbang_stop(&xspi->bitbang);
	free_irq(xspi->irq, xspi);
	iounmap(xspi->regs);

	release_mem_region(xspi->mem.start, resource_size(&xspi->mem));
	spi_master_put(xspi->bitbang.master);
}

static int spi_gpio_remove(struct platform_device *pdev)
{
	struct spi_gpio *sp;
	struct spi_gpio_platform_data *pdata;

	pdata = pdev->dev.platform_data;
	sp = platform_get_drvdata(pdev);

	spi_bitbang_stop(&sp->bitbang);
	spi_master_put(sp->bitbang.master);

	return 0;
}

static int spi_imx_remove(struct vmm_device *dev)
{
	struct spi_master *master = vmm_devdrv_get_data(dev);
	struct spi_imx_data *spi_imx = spi_master_get_devdata(master);

	spi_bitbang_stop(&spi_imx->bitbang);

	writel(0, spi_imx->base + MXC_CSPICTRL);
	clk_disable_unprepare(spi_imx->clk_ipg);
	clk_disable_unprepare(spi_imx->clk_per);
	spi_master_put(master);

	return 0;
}

static int spi_remove(struct platform_device *pdev)
{
	struct ssc_pio_t *pio_info =
			(struct ssc_pio_t *)pdev->dev.platform_data;
	struct spi_stm_gpio *sp = platform_get_drvdata(pdev);

	dgb_print("\n");
	spi_bitbang_stop(&sp->bitbang);
	spi_master_put(sp->bitbang.master);
	stpio_free_pin(pio_info->clk);
	stpio_free_pin(pio_info->sdout);
	stpio_free_pin(pio_info->sdin);
	return 0;
}