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| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2019-07-09 20:32:28 +0200 |
|---|---|---|
| committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2019-07-14 12:44:14 +0200 |
| commit | 42954857190b9df16d9d873ecc7f6cc38e013e44 (patch) | |
| tree | 98c588f629ff534d458eb0884782ea99672d7634 /target/linux/brcm2708/patches-4.19/950-0161-spi-Make-GPIO-CSs-honour-the-SPI_NO_CS-flag.patch | |
| parent | f1875e902d0afb7d9b9e5285b4fd8da7f6c5e30a (diff) | |
| download | upstream-42954857190b9df16d9d873ecc7f6cc38e013e44.tar.gz upstream-42954857190b9df16d9d873ecc7f6cc38e013e44.tar.bz2 upstream-42954857190b9df16d9d873ecc7f6cc38e013e44.zip | |
brcm2708: add linux 4.19 support
Boot tested on Raspberry Pi B+ (BCM2708) and Raspberry Pi 2 (BCM2709)
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0161-spi-Make-GPIO-CSs-honour-the-SPI_NO_CS-flag.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0161-spi-Make-GPIO-CSs-honour-the-SPI_NO_CS-flag.patch | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0161-spi-Make-GPIO-CSs-honour-the-SPI_NO_CS-flag.patch b/target/linux/brcm2708/patches-4.19/950-0161-spi-Make-GPIO-CSs-honour-the-SPI_NO_CS-flag.patch new file mode 100644 index 0000000000..85584d654b --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0161-spi-Make-GPIO-CSs-honour-the-SPI_NO_CS-flag.patch @@ -0,0 +1,32 @@ +From ac1bfbc3e45d83d617ce9fbae7522bbd0be3a075 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Tue, 3 Jul 2018 14:23:47 +0100 +Subject: [PATCH 161/703] spi: Make GPIO CSs honour the SPI_NO_CS flag + +The SPI configuration state includes an SPI_NO_CS flag that disables +all CS line manipulation, for applications that want to manage their +own chip selects. However, this flag is ignored by the GPIO CS code +in the SPI framework. + +Correct this omission with a trivial patch. + +See: https://github.com/raspberrypi/linux/issues/2169 + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + drivers/spi/spi.c | 4 +++- + 1 file changed, 3 insertions(+), 1 deletion(-) + +--- a/drivers/spi/spi.c ++++ b/drivers/spi/spi.c +@@ -733,7 +733,9 @@ static void spi_set_cs(struct spi_device + enable = !enable; + + if (gpio_is_valid(spi->cs_gpio)) { +- gpio_set_value_cansleep(spi->cs_gpio, !enable); ++ /* Honour the SPI_NO_CS flag */ ++ if (!(spi->mode & SPI_NO_CS)) ++ gpio_set_value_cansleep(spi->cs_gpio, !enable); + /* Some SPI masters need both GPIO CS & slave_select */ + if ((spi->controller->flags & SPI_MASTER_GPIO_SS) && + spi->controller->set_cs) |