diff options
Diffstat (limited to 'drivers/spi/spi-sh-hspi.c')
| -rw-r--r-- | drivers/spi/spi-sh-hspi.c | 94 |
1 files changed, 27 insertions, 67 deletions
diff --git a/drivers/spi/spi-sh-hspi.c b/drivers/spi/spi-sh-hspi.c index 60cfae51c71..c8e795ef2e1 100644 --- a/drivers/spi/spi-sh-hspi.c +++ b/drivers/spi/spi-sh-hspi.c @@ -46,8 +46,6 @@ /* SPSR */ #define RXFL (1 << 2) -#define hspi2info(h) (h->dev->platform_data) - struct hspi_priv { void __iomem *addr; struct spi_master *master; @@ -89,7 +87,7 @@ static int hspi_status_check_timeout(struct hspi_priv *hspi, u32 mask, u32 val) if ((mask & hspi_read(hspi, SPSR)) == val) return 0; - msleep(20); + udelay(10); } dev_err(hspi->dev, "timeout\n"); @@ -99,21 +97,6 @@ static int hspi_status_check_timeout(struct hspi_priv *hspi, u32 mask, u32 val) /* * spi master function */ -static int hspi_prepare_transfer(struct spi_master *master) -{ - struct hspi_priv *hspi = spi_master_get_devdata(master); - - pm_runtime_get_sync(hspi->dev); - return 0; -} - -static int hspi_unprepare_transfer(struct spi_master *master) -{ - struct hspi_priv *hspi = spi_master_get_devdata(master); - - pm_runtime_put_sync(hspi->dev); - return 0; -} #define hspi_hw_cs_enable(hspi) hspi_hw_cs_ctrl(hspi, 0) #define hspi_hw_cs_disable(hspi) hspi_hw_cs_ctrl(hspi, 1) @@ -128,14 +111,9 @@ static void hspi_hw_setup(struct hspi_priv *hspi, { struct spi_device *spi = msg->spi; struct device *dev = hspi->dev; - u32 target_rate; u32 spcr, idiv_clk; u32 rate, best_rate, min, tmp; - target_rate = t ? t->speed_hz : 0; - if (!target_rate) - target_rate = spi->max_speed_hz; - /* * find best IDIV/CLKCx settings */ @@ -152,10 +130,10 @@ static void hspi_hw_setup(struct hspi_priv *hspi, rate /= 16; /* CLKCx calculation */ - rate /= (((idiv_clk & 0x1F) + 1) * 2) ; + rate /= (((idiv_clk & 0x1F) + 1) * 2); /* save best settings */ - tmp = abs(target_rate - rate); + tmp = abs(t->speed_hz - rate); if (tmp < min) { min = tmp; spcr = idiv_clk; @@ -168,7 +146,7 @@ static void hspi_hw_setup(struct hspi_priv *hspi, if (spi->mode & SPI_CPOL) spcr |= 1 << 6; - dev_dbg(dev, "speed %d/%d\n", target_rate, best_rate); + dev_dbg(dev, "speed %d/%d\n", t->speed_hz, best_rate); hspi_write(hspi, SPCR, spcr); hspi_write(hspi, SPSR, 0x0); @@ -212,7 +190,7 @@ static int hspi_transfer_one_message(struct spi_master *master, hspi_write(hspi, SPTBR, tx); - /* wait recive */ + /* wait receive */ ret = hspi_status_check_timeout(hspi, 0x4, 0x4); if (ret < 0) break; @@ -245,29 +223,6 @@ static int hspi_transfer_one_message(struct spi_master *master, return ret; } -static int hspi_setup(struct spi_device *spi) -{ - struct hspi_priv *hspi = spi_master_get_devdata(spi->master); - struct device *dev = hspi->dev; - - if (8 != spi->bits_per_word) { - dev_err(dev, "bits_per_word should be 8\n"); - return -EIO; - } - - dev_dbg(dev, "%s setup\n", spi->modalias); - - return 0; -} - -static void hspi_cleanup(struct spi_device *spi) -{ - struct hspi_priv *hspi = spi_master_get_devdata(spi->master); - struct device *dev = hspi->dev; - - dev_dbg(dev, "%s cleanup\n", spi->modalias); -} - static int hspi_probe(struct platform_device *pdev) { struct resource *res; @@ -289,15 +244,15 @@ static int hspi_probe(struct platform_device *pdev) return -ENOMEM; } - clk = clk_get(NULL, "shyway_clk"); + clk = clk_get(&pdev->dev, NULL); if (IS_ERR(clk)) { - dev_err(&pdev->dev, "shyway_clk is required\n"); + dev_err(&pdev->dev, "couldn't get clock\n"); ret = -EINVAL; goto error0; } hspi = spi_master_get_devdata(master); - dev_set_drvdata(&pdev->dev, hspi); + platform_set_drvdata(pdev, hspi); /* init hspi */ hspi->master = master; @@ -311,26 +266,25 @@ static int hspi_probe(struct platform_device *pdev) goto error1; } - master->num_chipselect = 1; + pm_runtime_enable(&pdev->dev); + master->bus_num = pdev->id; - master->setup = hspi_setup; - master->cleanup = hspi_cleanup; master->mode_bits = SPI_CPOL | SPI_CPHA; - master->prepare_transfer_hardware = hspi_prepare_transfer; + master->dev.of_node = pdev->dev.of_node; + master->auto_runtime_pm = true; master->transfer_one_message = hspi_transfer_one_message; - master->unprepare_transfer_hardware = hspi_unprepare_transfer; - ret = spi_register_master(master); + master->bits_per_word_mask = SPI_BPW_MASK(8); + + ret = devm_spi_register_master(&pdev->dev, master); if (ret < 0) { dev_err(&pdev->dev, "spi_register_master error.\n"); - goto error1; + goto error2; } - pm_runtime_enable(&pdev->dev); - - dev_info(&pdev->dev, "probed\n"); - return 0; + error2: + pm_runtime_disable(&pdev->dev); error1: clk_put(clk); error0: @@ -341,22 +295,28 @@ static int hspi_probe(struct platform_device *pdev) static int hspi_remove(struct platform_device *pdev) { - struct hspi_priv *hspi = dev_get_drvdata(&pdev->dev); + struct hspi_priv *hspi = platform_get_drvdata(pdev); pm_runtime_disable(&pdev->dev); clk_put(hspi->clk); - spi_unregister_master(hspi->master); return 0; } +static struct of_device_id hspi_of_match[] = { + { .compatible = "renesas,hspi", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, hspi_of_match); + static struct platform_driver hspi_driver = { .probe = hspi_probe, .remove = hspi_remove, .driver = { .name = "sh-hspi", .owner = THIS_MODULE, + .of_match_table = hspi_of_match, }, }; module_platform_driver(hspi_driver); @@ -364,4 +324,4 @@ module_platform_driver(hspi_driver); MODULE_DESCRIPTION("SuperH HSPI bus driver"); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>"); -MODULE_ALIAS("platform:sh_spi"); +MODULE_ALIAS("platform:sh-hspi"); |