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 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 ath79_spi_probe(struct platform_device *pdev) { struct spi_master *master; struct ath79_spi *sp; struct ath79_spi_platform_data *pdata; struct resource *r; unsigned long rate; int ret; master = spi_alloc_master(&pdev->dev, sizeof(*sp)); if (master == NULL) { dev_err(&pdev->dev, "failed to allocate spi master\n"); return -ENOMEM; } sp = spi_master_get_devdata(master); platform_set_drvdata(pdev, sp); pdata = dev_get_platdata(&pdev->dev); master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 32); master->setup = ath79_spi_setup; master->cleanup = ath79_spi_cleanup; if (pdata) { master->bus_num = pdata->bus_num; master->num_chipselect = pdata->num_chipselect; } sp->bitbang.master = spi_master_get(master); sp->bitbang.chipselect = ath79_spi_chipselect; sp->bitbang.txrx_word[SPI_MODE_0] = ath79_spi_txrx_mode0; sp->bitbang.setup_transfer = spi_bitbang_setup_transfer; sp->bitbang.flags = SPI_CS_HIGH; r = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (r == NULL) { ret = -ENOENT; goto err_put_master; } sp->base = ioremap(r->start, resource_size(r)); if (!sp->base) { ret = -ENXIO; goto err_put_master; } sp->clk = clk_get(&pdev->dev, "ahb"); if (IS_ERR(sp->clk)) { ret = PTR_ERR(sp->clk); goto err_unmap; } ret = clk_enable(sp->clk); if (ret) goto err_clk_put; rate = DIV_ROUND_UP(clk_get_rate(sp->clk), MHZ); if (!rate) { ret = -EINVAL; goto err_clk_disable; } sp->rrw_delay = ATH79_SPI_RRW_DELAY_FACTOR / rate; dev_dbg(&pdev->dev, "register read/write delay is %u nsecs\n", sp->rrw_delay); ath79_spi_enable(sp); ret = spi_bitbang_start(&sp->bitbang); if (ret) goto err_disable; return 0; err_disable: ath79_spi_disable(sp); err_clk_disable: clk_disable(sp->clk); err_clk_put: clk_put(sp->clk); err_unmap: iounmap(sp->base); err_put_master: spi_master_put(sp->bitbang.master); return ret; }