diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0134-spi-spi-bcm2835-Disable-forced-software-CS.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0134-spi-spi-bcm2835-Disable-forced-software-CS.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0134-spi-spi-bcm2835-Disable-forced-software-CS.patch b/target/linux/bcm27xx/patches-5.4/950-0134-spi-spi-bcm2835-Disable-forced-software-CS.patch new file mode 100644 index 0000000000..0abe5059c0 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0134-spi-spi-bcm2835-Disable-forced-software-CS.patch @@ -0,0 +1,47 @@ +From dc1e3fefce7abd7532fbc74e26df61a8ced1dcd6 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.org> +Date: Tue, 15 Jan 2019 12:41:15 +0000 +Subject: [PATCH] spi: spi-bcm2835: Disable forced software CS + +With GPIO CS used by the DTBs, allow hardware CS to be selected by an +overlay. + +Signed-off-by: Phil Elwell <phil@raspberrypi.org> +--- + drivers/spi/spi-bcm2835.c | 37 ------------------------------------- + 1 file changed, 37 deletions(-) + +--- a/drivers/spi/spi-bcm2835.c ++++ b/drivers/spi/spi-bcm2835.c +@@ -1230,31 +1230,6 @@ static int bcm2835_spi_setup(struct spi_ + return -EINVAL; + } + +- /* +- * Translate native CS to GPIO +- * +- * FIXME: poking around in the gpiolib internals like this is +- * not very good practice. Find a way to locate the real problem +- * and fix it. Why is the GPIO descriptor in spi->cs_gpiod +- * sometimes not assigned correctly? Erroneous device trees? +- */ +- +- /* get the gpio chip for the base */ +- chip = gpiochip_find("pinctrl-bcm2835", chip_match_name); +- if (!chip) +- return 0; +- +- spi->cs_gpiod = gpiochip_request_own_desc(chip, 8 - spi->chip_select, +- DRV_NAME, +- GPIO_LOOKUP_FLAGS_DEFAULT, +- GPIOD_OUT_LOW); +- if (IS_ERR(spi->cs_gpiod)) +- return PTR_ERR(spi->cs_gpiod); +- +- /* and set up the "mode" and level */ +- dev_info(&spi->dev, "setting up native-CS%i to use GPIO\n", +- spi->chip_select); +- + return 0; + } + |