From mboxrd@z Thu Jan 1 00:00:00 1970 From: Geert Uytterhoeven Date: Thu, 20 Feb 2014 14:43:09 +0000 Subject: [PATCH 10/10] spi: sh-msiof: Use core message handling instead of spi-bitbang Message-Id: <1392907389-21798-11-git-send-email-geert@linux-m68k.org> List-Id: References: <1392907389-21798-1-git-send-email-geert@linux-m68k.org> In-Reply-To: <1392907389-21798-1-git-send-email-geert@linux-m68k.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Mark Brown Cc: Takashi Yoshii , Magnus Damm , linux-spi@vger.kernel.org, linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven From: Geert Uytterhoeven The only remaining feature of spi-bitbang used by this driver is the chipselect() callback, which just does conditional GPIO. This is handled fine by the SPI core's spi_set_cs(), hence switch the driver to use the core message handling through our own transfer_one() method. Remove the call to spi_master_put() in sh_msiof_spi_remove(), as our SPI master is now registered using devm_spi_register_master() (spi_bitbang_start() uses the non-managed version). Signed-off-by: Geert Uytterhoeven --- drivers/spi/Kconfig | 1 - drivers/spi/spi-sh-msiof.c | 65 ++++++++++++-------------------------------- 2 files changed, 17 insertions(+), 49 deletions(-) diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 339da4b15ec2..35d5c029393a 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -416,7 +416,6 @@ config SPI_SH_MSIOF tristate "SuperH MSIOF SPI controller" depends on HAVE_CLK depends on SUPERH || ARCH_SHMOBILE || COMPILE_TEST - select SPI_BITBANG help SPI driver for SuperH and SH Mobile MSIOF blocks. diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index bd300fcb7116..642b0b637df1 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -26,7 +26,6 @@ #include #include -#include #include @@ -36,7 +35,6 @@ struct sh_msiof_chipdata { }; struct sh_msiof_spi_priv { - struct spi_bitbang bitbang; /* must be first for spi_bitbang.c */ void __iomem *mapbase; struct clk *clk; struct platform_device *pdev; @@ -452,8 +450,7 @@ static int sh_msiof_spi_setup(struct spi_device *spi) */ spi->cs_gpio = (uintptr_t)spi->controller_data; } - - return spi_bitbang_setup(spi); + return 0; } static int sh_msiof_prepare_message(struct spi_master *master, @@ -488,20 +485,6 @@ static int sh_msiof_unprepare_message(struct spi_master *master, return 0; } -static void sh_msiof_spi_chipselect(struct spi_device *spi, int is_on) -{ - int value; - - /* chip select is active low unless SPI_CS_HIGH is set */ - if (spi->mode & SPI_CS_HIGH) - value = (is_on = BITBANG_CS_ACTIVE) ? 1 : 0; - else - value = (is_on = BITBANG_CS_ACTIVE) ? 0 : 1; - - if (spi->cs_gpio >= 0) - gpio_set_value(spi->cs_gpio, value); -} - static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p, void (*tx_fifo)(struct sh_msiof_spi_priv *, const void *, int, int), @@ -571,9 +554,11 @@ static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p, return ret; } -static int sh_msiof_spi_txrx(struct spi_device *spi, struct spi_transfer *t) +static int sh_msiof_transfer_one(struct spi_master *master, + struct spi_device *spi, + struct spi_transfer *t) { - struct sh_msiof_spi_priv *p = spi_master_get_devdata(spi->master); + struct sh_msiof_spi_priv *p = spi_master_get_devdata(master); void (*tx_fifo)(struct sh_msiof_spi_priv *, const void *, int, int); void (*rx_fifo)(struct sh_msiof_spi_priv *, void *, int, int); int bits; @@ -654,13 +639,6 @@ static int sh_msiof_spi_txrx(struct spi_device *spi, struct spi_transfer *t) words -= n; } - return bytes_done; -} - -static u32 sh_msiof_spi_txrx_word(struct spi_device *spi, unsigned nsecs, - u32 word, u8 bits) -{ - BUG(); /* unused but needed by bitbang code */ return 0; } @@ -795,7 +773,7 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) if (p->info->rx_fifo_override) p->rx_fifo_size = p->info->rx_fifo_override; - /* init master and bitbang code */ + /* init master code */ master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; master->mode_bits |= SPI_LSB_FIRST | SPI_3WIRE; master->flags = p->chipdata->master_flags; @@ -803,24 +781,20 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) master->dev.of_node = pdev->dev.of_node; master->num_chipselect = p->info->num_chipselect; master->setup = sh_msiof_spi_setup; - master->cleanup = spi_bitbang_cleanup; master->prepare_message = sh_msiof_prepare_message; master->unprepare_message = sh_msiof_unprepare_message; master->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32); + master->transfer_one = sh_msiof_transfer_one; - p->bitbang.master = master; - p->bitbang.chipselect = sh_msiof_spi_chipselect; - p->bitbang.setup_transfer = spi_bitbang_setup_transfer; - p->bitbang.txrx_bufs = sh_msiof_spi_txrx; - p->bitbang.txrx_word[SPI_MODE_0] = sh_msiof_spi_txrx_word; - p->bitbang.txrx_word[SPI_MODE_1] = sh_msiof_spi_txrx_word; - p->bitbang.txrx_word[SPI_MODE_2] = sh_msiof_spi_txrx_word; - p->bitbang.txrx_word[SPI_MODE_3] = sh_msiof_spi_txrx_word; + ret = devm_spi_register_master(&pdev->dev, master); + if (ret < 0) { + dev_err(&pdev->dev, "spi_register_master error.\n"); + goto err2; + } - ret = spi_bitbang_start(&p->bitbang); - if (ret = 0) - return 0; + return 0; + err2: pm_runtime_disable(&pdev->dev); clk_unprepare(p->clk); err1: @@ -831,15 +805,10 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) static int sh_msiof_spi_remove(struct platform_device *pdev) { struct sh_msiof_spi_priv *p = platform_get_drvdata(pdev); - int ret; - ret = spi_bitbang_stop(&p->bitbang); - if (!ret) { - pm_runtime_disable(&pdev->dev); - clk_unprepare(p->clk); - spi_master_put(p->bitbang.master); - } - return ret; + pm_runtime_disable(&pdev->dev); + clk_unprepare(p->clk); + return 0; } static struct platform_device_id spi_driver_ids[] = { -- 1.7.9.5