diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0646-spi-Force-CS_HIGH-if-GPIO-descriptors-are-used.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0646-spi-Force-CS_HIGH-if-GPIO-descriptors-are-used.patch | 48 |
1 files changed, 0 insertions, 48 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0646-spi-Force-CS_HIGH-if-GPIO-descriptors-are-used.patch b/target/linux/bcm27xx/patches-5.4/950-0646-spi-Force-CS_HIGH-if-GPIO-descriptors-are-used.patch deleted file mode 100644 index 8e85d6e29f..0000000000 --- a/target/linux/bcm27xx/patches-5.4/950-0646-spi-Force-CS_HIGH-if-GPIO-descriptors-are-used.patch +++ /dev/null @@ -1,48 +0,0 @@ -From 5f2eface651ba5da9caaa84ccca14b9202ba6202 Mon Sep 17 00:00:00 2001 -From: Phil Elwell <phil@raspberrypi.com> -Date: Fri, 17 Apr 2020 10:46:19 +0100 -Subject: [PATCH] spi: Force CS_HIGH if GPIO descriptors are used - -Commit f3186dd87669 ("spi: Optionally use GPIO descriptors for CS GPIOs") -amended of_spi_parse_dt() to always set SPI_CS_HIGH for SPI slaves whose -Chip Select is defined by a "cs-gpios" devicetree property. - -This change breaks drivers whose probe functions set the mode field of -the spi_device because in doing so they clear the SPI_CS_HIGH flag. - -Fix by setting SPI_CS_HIGH in spi_setup (under the same conditions as -in of_spi_parse_dt()). - -See also: 83b2a8fe43bd ("spi: spidev: Fix CS polarity if GPIO descriptors are used") - -Fixes: f3186dd87669 ("spi: Optionally use GPIO descriptors for CS GPIOs") -Signed-off-by: Phil Elwell <phil@raspberrypi.com> ---- - drivers/spi/spi.c | 9 +++++++++ - 1 file changed, 9 insertions(+) - ---- a/drivers/spi/spi.c -+++ b/drivers/spi/spi.c -@@ -3117,6 +3117,7 @@ static int __spi_validate_bits_per_word( - */ - int spi_setup(struct spi_device *spi) - { -+ struct spi_controller *ctlr = spi->controller; - unsigned bad_bits, ugly_bits; - int status; - -@@ -3134,6 +3135,14 @@ int spi_setup(struct spi_device *spi) - (SPI_TX_DUAL | SPI_TX_QUAD | SPI_TX_OCTAL | - SPI_RX_DUAL | SPI_RX_QUAD | SPI_RX_OCTAL))) - return -EINVAL; -+ -+ if (ctlr->use_gpio_descriptors && ctlr->cs_gpiods && -+ ctlr->cs_gpiods[spi->chip_select] && !(spi->mode & SPI_CS_HIGH)) { -+ dev_warn(&spi->dev, -+ "setup: forcing CS_HIGH (use_gpio_descriptors)\n"); -+ spi->mode |= SPI_CS_HIGH; -+ } -+ - /* help drivers fail *cleanly* when they need options - * that aren't supported with their current controller - * SPI_CS_WORD has a fallback software implementation, |