brcm2708: rename target to bcm27xx

[openwrt/openwrt.git] / target / linux / brcm2708 / patches-4.19 / 950-0010-spi-bcm2835-Support-pin-groups-other-than-7-11.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0010-spi-bcm2835-Support-pin-groups-other-than-7-11.patch b/target/linux/brcm2708/patches-4.19/950-0010-spi-bcm2835-Support-pin-groups-other-than-7-11.patch
deleted file mode 100644 (file)
index 0517999..0000000
--- a/target/linux/brcm2708/patches-4.19/950-0010-spi-bcm2835-Support-pin-groups-other-than-7-11.patch
+++ /dev/null
@@ -1,80 +0,0 @@
-From 61ca6adb1fc93622bb85acc18b6ce4f620c8c690 Mon Sep 17 00:00:00 2001
-From: Phil Elwell <phil@raspberrypi.org>
-Date: Wed, 24 Jun 2015 14:10:44 +0100
-Subject: [PATCH] spi-bcm2835: Support pin groups other than 7-11
-
-The spi-bcm2835 driver automatically uses GPIO chip-selects due to
-some unreliability of the native ones. In doing so it chooses the
-same pins as the native chip-selects would use, but the existing
-code always uses pins 7 and 8, wherever the SPI function is mapped.
-
-Search the pinctrl group assigned to the driver for pins that
-correspond to native chip-selects, and use those for GPIO chip-
-selects.
-
-Signed-off-by: Phil Elwell <phil@raspberrypi.org>
----
- drivers/spi/spi-bcm2835.c | 45 ++++++++++++++++++++++++++++++++-------
- 1 file changed, 37 insertions(+), 8 deletions(-)
-
---- a/drivers/spi/spi-bcm2835.c
-+++ b/drivers/spi/spi-bcm2835.c
-@@ -687,6 +687,8 @@ static int bcm2835_spi_setup(struct spi_
- {
-       int err;
-       struct gpio_chip *chip;
-+      struct device_node *pins;
-+      u32 pingroup_index;
-       /*
-        * sanity checking the native-chipselects
-        */
-@@ -703,15 +705,42 @@ static int bcm2835_spi_setup(struct spi_
-                       "setup: only two native chip-selects are supported\n");
-               return -EINVAL;
-       }
--      /* now translate native cs to GPIO */
- 
--      /* get the gpio chip for the base */
--      chip = gpiochip_find("pinctrl-bcm2835", chip_match_name);
--      if (!chip)
--              return 0;
-+      /* now translate native cs to GPIO */
-+      /* first look for chip select pins in the devices pin groups */
-+      for (pingroup_index = 0;
-+           (pins = of_parse_phandle(spi->master->dev.of_node,
-+                                   "pinctrl-0",
-+                                    pingroup_index)) != 0;
-+           pingroup_index++) {
-+              u32 pin;
-+              u32 pin_index;
-+              for (pin_index = 0;
-+                   of_property_read_u32_index(pins,
-+                                              "brcm,pins",
-+                                              pin_index,
-+                                              &pin) == 0;
-+                   pin_index++) {
-+                      if (((spi->chip_select == 0) &&
-+                           ((pin == 8) || (pin == 36) || (pin == 46))) ||
-+                          ((spi->chip_select == 1) &&
-+                           ((pin == 7) || (pin == 35)))) {
-+                              spi->cs_gpio = pin;
-+                              break;
-+                      }
-+              }
-+              of_node_put(pins);
-+      }
-+      /* if that fails, assume GPIOs 7-11 are used */
-+      if (!gpio_is_valid(spi->cs_gpio) ) {
-+              /* get the gpio chip for the base */
-+              chip = gpiochip_find("pinctrl-bcm2835", chip_match_name);
-+              if (!chip)
-+                      return 0;
- 
--      /* and calculate the real CS */
--      spi->cs_gpio = chip->base + 8 - spi->chip_select;
-+              /* and calculate the real CS */
-+              spi->cs_gpio = chip->base + 8 - spi->chip_select;
-+      }
- 
-       /* and set up the "mode" and level */
-       dev_info(&spi->dev, "setting up native-CS%i as GPIO %i\n",