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author | Álvaro Fernández Rojas <noltari@gmail.com> | 2020-05-28 19:08:55 +0200 |
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committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2020-05-28 19:12:43 +0200 |
commit | 77e97abf129c5028385dd72587eabab68db0d954 (patch) | |
tree | fc52a8c2ba346da77281f00538a1eb6de49deb5d /target/linux/bcm27xx/patches-5.4/950-0653-spi-Force-CS_HIGH-if-GPIO-descriptors-are-used.patch | |
parent | 5d3a0c6b26144eb5d62515b99613b5ad8dbdc717 (diff) | |
download | upstream-77e97abf129c5028385dd72587eabab68db0d954.tar.gz upstream-77e97abf129c5028385dd72587eabab68db0d954.tar.bz2 upstream-77e97abf129c5028385dd72587eabab68db0d954.zip |
bcm27xx: update to latest patches from RPi foundation
Also removes random module and switches to new bcm2711 thermal driver.
Boot tested on RPi 4B v1.1 4G.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0653-spi-Force-CS_HIGH-if-GPIO-descriptors-are-used.patch')
-rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0653-spi-Force-CS_HIGH-if-GPIO-descriptors-are-used.patch | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0653-spi-Force-CS_HIGH-if-GPIO-descriptors-are-used.patch b/target/linux/bcm27xx/patches-5.4/950-0653-spi-Force-CS_HIGH-if-GPIO-descriptors-are-used.patch new file mode 100644 index 0000000000..43d10486de --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0653-spi-Force-CS_HIGH-if-GPIO-descriptors-are-used.patch @@ -0,0 +1,48 @@ +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 +@@ -3032,6 +3032,7 @@ 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; + +@@ -3049,6 +3050,14 @@ 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, |