lkml.org 
[lkml]   [2020]   [Jan]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    SubjectApplied "spi: rspi: Add support for GPIO chip selects" to the spi tree
    The patch

    spi: rspi: Add support for GPIO chip selects

    has been applied to the spi tree at

    https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-5.6

    All being well this means that it will be integrated into the linux-next
    tree (usually sometime in the next 24 hours) and sent to Linus during
    the next merge window (or sooner if it is a bug fix), however if
    problems are discovered then the patch may be dropped or reverted.

    You may get further e-mails resulting from automated or manual testing
    and review of the tree, please engage with people reporting problems and
    send followup patches addressing any issues that are reported if needed.

    If any updates are required or you are submitting further changes they
    should be sent as incremental updates against current git, existing
    patches will not be replaced.

    Please add any relevant lists and maintainers to the CCs when replying
    to this mail.

    Thanks,
    Mark

    From 144d8f9781e60d89dfd614210d2cedbefbba8885 Mon Sep 17 00:00:00 2001
    From: Geert Uytterhoeven <geert+renesas@glider.be>
    Date: Thu, 2 Jan 2020 14:38:22 +0100
    Subject: [PATCH] spi: rspi: Add support for GPIO chip selects

    Add support for GPIO chip selects using GPIO descriptors. As the RSPI
    controller always drives a native chip select when performing a
    transfer, at least one native chip select must be left unused.

    Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
    Link: https://lore.kernel.org/r/20200102133822.29346-7-geert+renesas@glider.be
    Signed-off-by: Mark Brown <broonie@kernel.org>
    ---
    drivers/spi/spi-rspi.c | 9 ++++++++-
    1 file changed, 8 insertions(+), 1 deletion(-)

    diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
    index 2f5a856a9319..85575d45901c 100644
    --- a/drivers/spi/spi-rspi.c
    +++ b/drivers/spi/spi-rspi.c
    @@ -242,6 +242,7 @@ struct spi_ops {
    u16 mode_bits;
    u16 flags;
    u16 fifo_size;
    + u8 num_hw_ss;
    };

    /*
    @@ -934,7 +935,8 @@ static int rspi_prepare_message(struct spi_controller *ctlr,
    rspi->spcmd |= SPCMD_CPHA;

    /* Configure slave signal to assert */
    - rspi->spcmd |= SPCMD_SSLA(spi->chip_select);
    + rspi->spcmd |= SPCMD_SSLA(spi->cs_gpiod ? rspi->ctlr->unused_native_cs
    + : spi->chip_select);

    /* CMOS output mode and MOSI signal from previous transfer */
    rspi->sppcr = 0;
    @@ -1123,6 +1125,7 @@ static const struct spi_ops rspi_ops = {
    .mode_bits = SPI_CPHA | SPI_CPOL | SPI_LOOP,
    .flags = SPI_CONTROLLER_MUST_TX,
    .fifo_size = 8,
    + .num_hw_ss = 2,
    };

    static const struct spi_ops rspi_rz_ops = {
    @@ -1131,6 +1134,7 @@ static const struct spi_ops rspi_rz_ops = {
    .mode_bits = SPI_CPHA | SPI_CPOL | SPI_LOOP,
    .flags = SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX,
    .fifo_size = 8, /* 8 for TX, 32 for RX */
    + .num_hw_ss = 1,
    };

    static const struct spi_ops qspi_ops = {
    @@ -1141,6 +1145,7 @@ static const struct spi_ops qspi_ops = {
    SPI_RX_DUAL | SPI_RX_QUAD,
    .flags = SPI_CONTROLLER_MUST_RX | SPI_CONTROLLER_MUST_TX,
    .fifo_size = 32,
    + .num_hw_ss = 1,
    };

    #ifdef CONFIG_OF
    @@ -1256,6 +1261,8 @@ static int rspi_probe(struct platform_device *pdev)
    ctlr->mode_bits = ops->mode_bits;
    ctlr->flags = ops->flags;
    ctlr->dev.of_node = pdev->dev.of_node;
    + ctlr->use_gpio_descriptors = true;
    + ctlr->max_native_cs = rspi->ops->num_hw_ss;

    ret = platform_get_irq_byname_optional(pdev, "rx");
    if (ret < 0) {
    --
    2.20.1
    \
     
     \ /
      Last update: 2020-01-08 17:00    [W:5.095 / U:0.676 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site