Messages in this thread Patch in this message | | | From | Geert Uytterhoeven <> | Subject | [PATCH 08/10] spi: sh-msiof: Move clock management to (un)prepare_message() | Date | Thu, 20 Feb 2014 15:43:07 +0100 |
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From: Geert Uytterhoeven <geert+renesas@linux-m68k.org>
Move clock management and pin configuration from the bitbang chipselect() method to the SPI core prepare_message() and unprepare_message() methods.
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> --- drivers/spi/spi-sh-msiof.c | 56 +++++++++++++++++++++++++++----------------- 1 file changed, 34 insertions(+), 22 deletions(-)
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index 31624fb4997d..7add4be37987 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -472,9 +472,40 @@ static int sh_msiof_spi_setup(struct spi_device *spi) return spi_bitbang_setup(spi); } +static int sh_msiof_prepare_message(struct spi_master *master, + struct spi_message *msg) +{ + struct sh_msiof_spi_priv *p = spi_master_get_devdata(master); + const struct spi_device *spi = msg->spi; + + if (!test_and_set_bit(0, &p->flags)) { + pm_runtime_get_sync(&p->pdev->dev); + clk_enable(p->clk); + } + + /* Configure pins before asserting CS */ + sh_msiof_spi_set_pin_regs(p, !!(spi->mode & SPI_CPOL), + !!(spi->mode & SPI_CPHA), + !!(spi->mode & SPI_3WIRE), + !!(spi->mode & SPI_LSB_FIRST), + !!(spi->mode & SPI_CS_HIGH)); + return 0; +} + +static int sh_msiof_unprepare_message(struct spi_master *master, + struct spi_message *msg) +{ + struct sh_msiof_spi_priv *p = spi_master_get_devdata(master); + + if (test_and_clear_bit(0, &p->flags)) { + clk_disable(p->clk); + pm_runtime_put(&p->pdev->dev); + } + return 0; +} + static void sh_msiof_spi_chipselect(struct spi_device *spi, int is_on) { - struct sh_msiof_spi_priv *p = spi_master_get_devdata(spi->master); int value; /* chip select is active low unless SPI_CS_HIGH is set */ @@ -483,29 +514,8 @@ static void sh_msiof_spi_chipselect(struct spi_device *spi, int is_on) else value = (is_on == BITBANG_CS_ACTIVE) ? 0 : 1; - if (is_on == BITBANG_CS_ACTIVE) { - if (!test_and_set_bit(0, &p->flags)) { - pm_runtime_get_sync(&p->pdev->dev); - clk_enable(p->clk); - } - - /* Configure pins before asserting CS */ - sh_msiof_spi_set_pin_regs(p, !!(spi->mode & SPI_CPOL), - !!(spi->mode & SPI_CPHA), - !!(spi->mode & SPI_3WIRE), - !!(spi->mode & SPI_LSB_FIRST), - !!(spi->mode & SPI_CS_HIGH)); - } - if (spi->cs_gpio >= 0) gpio_set_value(spi->cs_gpio, value); - - if (is_on == BITBANG_CS_INACTIVE) { - if (test_and_clear_bit(0, &p->flags)) { - clk_disable(p->clk); - pm_runtime_put(&p->pdev->dev); - } - } } static int sh_msiof_spi_txrx_once(struct sh_msiof_spi_priv *p, @@ -810,6 +820,8 @@ static int sh_msiof_spi_probe(struct platform_device *pdev) 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; p->bitbang.master = master; p->bitbang.chipselect = sh_msiof_spi_chipselect; -- 1.7.9.5
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