openwrt/target/linux/bcm27xx/patches-5.15/950-0696-spi-gpio-Add-sck-idle-input-property.patch
John Audia 738b04c881 kernel: bump 5.15 to 5.15.86
Removed upstreamed:
  pending-5.15/101-Use-stddefs.h-instead-of-compiler.h.patch[1]
  ipq806x/patches-5.15/122-01-clk-qcom-clk-krait-fix-wrong-div2-functions.patch[2]
  bcm27xx/patches-5.15/950-0198-drm-fourcc-Add-packed-10bit-YUV-4-2-0-format.patch[3]

Manually rebased:
  ramips/patches-5.15/100-PCI-mt7621-Add-MediaTek-MT7621-PCIe-host-controller-.patch[4]

Added patch/backported:
  ramips/patches-5.15/107-PCI-mt7621-Add-sentinel-to-quirks-table.patch[5]

All other patches automatically rebased.

1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.86&id=c160505c9b574b346031fdf2c649d19e7939ca11
2. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.86&id=a051e10bfc6906d29dae7a31f0773f2702edfe1b
3. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.86&id=ec1727f89ecd6f2252c0c75e200058819f7ce47a
4. Quilt gave this output when I applied the patch to rebase it:
% quilt push -f
Applying patch platform/100-PCI-mt7621-Add-MediaTek-MT7621-PCIe-host-controller-.patch
patching file arch/mips/ralink/Kconfig
patching file drivers/pci/controller/Kconfig
patching file drivers/pci/controller/Makefile
patching file drivers/staging/Kconfig
patching file drivers/staging/Makefile
patching file drivers/staging/mt7621-pci/Kconfig
patching file drivers/staging/mt7621-pci/Makefile
patching file drivers/staging/mt7621-pci/TODO
patching file drivers/staging/mt7621-pci/mediatek,mt7621-pci.txt
patching file drivers/staging/mt7621-pci/pci-mt7621.c
Hunk #1 FAILED at 1.
Not deleting file drivers/staging/mt7621-pci/pci-mt7621.c as content differs from patch
1 out of 1 hunk FAILED -- saving rejects to file drivers/staging/mt7621-pci/pci-mt7621.c.rej
patching file drivers/pci/controller/pcie-mt7621.c
Applied patch platform/100-PCI-mt7621-Add-MediaTek-MT7621-PCIe-host-controller-.patch (forced; needs refresh)

Upon inspecting drivers/staging/mt7621-pci/pci-mt7621.c.rej, it seems that
the original patch wants to delete drivers/staging/mt7621-pci/pci-mt7621.c
but upstream's version was not an exact match.  I opted to delete that
file.

5. Suggestion by hauke: 19098934f9
"This patch is in upstream kernel, but it was backported to the old
staging driver in kernel 5.15."

Build system: x86_64
Build-tested: bcm2711/RPi4B, filogic/xiaomi_redmi-router-ax6000-ubootmod
Run-tested: bcm2711/RPi4B, filogic/xiaomi_redmi-router-ax6000-ubootmod

Signed-off-by: John Audia <therealgraysky@proton.me>
2023-01-03 23:55:45 +01:00

58 lines
1.9 KiB
Diff

From c979072887ef70aab2ab6e71544853df71017925 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.com>
Date: Wed, 12 Jan 2022 08:23:28 +0000
Subject: [PATCH] spi: gpio: Add sck-idle-input property
The sck-idle-input property indicates that the spi-gpio driver should
return the SCK line to an input when the chip select signals are
inactive.
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
---
drivers/spi/spi-gpio.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
--- a/drivers/spi/spi-gpio.c
+++ b/drivers/spi/spi-gpio.c
@@ -35,6 +35,7 @@ struct spi_gpio {
struct gpio_desc *sck;
struct gpio_desc *miso;
struct gpio_desc *mosi;
+ bool sck_idle_input;
struct gpio_desc **cs_gpios;
};
@@ -201,8 +202,12 @@ static void spi_gpio_chipselect(struct s
struct spi_gpio *spi_gpio = spi_to_spi_gpio(spi);
/* set initial clock line level */
- if (is_active)
- gpiod_set_value_cansleep(spi_gpio->sck, spi->mode & SPI_CPOL);
+ if (is_active) {
+ if (spi_gpio->sck_idle_input)
+ gpiod_direction_output(spi_gpio->sck, spi->mode & SPI_CPOL);
+ else
+ gpiod_set_value_cansleep(spi_gpio->sck, spi->mode & SPI_CPOL);
+ }
/* Drive chip select line, if we have one */
if (spi_gpio->cs_gpios) {
@@ -211,6 +216,9 @@ static void spi_gpio_chipselect(struct s
/* SPI chip selects are normally active-low */
gpiod_set_value_cansleep(cs, (spi->mode & SPI_CS_HIGH) ? is_active : !is_active);
}
+
+ if (spi_gpio->sck_idle_input && !is_active)
+ gpiod_direction_input(spi_gpio->sck);
}
static int spi_gpio_setup(struct spi_device *spi)
@@ -299,6 +307,7 @@ static int spi_gpio_request(struct devic
if (IS_ERR(spi_gpio->miso))
return PTR_ERR(spi_gpio->miso);
+ spi_gpio->sck_idle_input = device_property_read_bool(dev, "sck-idle-input");
spi_gpio->sck = devm_gpiod_get(dev, "sck", GPIOD_OUT_LOW);
return PTR_ERR_OR_ZERO(spi_gpio->sck);
}