brcm2708: rename target to bcm27xx

[openwrt/openwrt.git] / target / linux / brcm2708 / patches-4.19 / 950-0698-regulator-gpio-Allow-nonexclusive-GPIO-access.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0698-regulator-gpio-Allow-nonexclusive-GPIO-access.patch b/target/linux/brcm2708/patches-4.19/950-0698-regulator-gpio-Allow-nonexclusive-GPIO-access.patch
deleted file mode 100644 (file)
index a940736..0000000
--- a/target/linux/brcm2708/patches-4.19/950-0698-regulator-gpio-Allow-nonexclusive-GPIO-access.patch
+++ /dev/null
@@ -1,79 +0,0 @@
-From f6d983b7bc9ae79d0eb4dea7bc30a1ad5ff428a7 Mon Sep 17 00:00:00 2001
-From: Linus Walleij <linus.walleij@linaro.org>
-Date: Fri, 12 Oct 2018 14:54:12 +0200
-Subject: [PATCH] regulator/gpio: Allow nonexclusive GPIO access
-
-commit b0ce7b29bfcd090ddba476f45a75ec0a797b048a upstream.
-
-[ This is a partial cherry-pick, omitting the regulator
-change which isn't required ]
-
-This allows nonexclusive (simultaneous) access to a single
-GPIO line for the fixed regulator enable line. This happens
-when several regulators use the same GPIO for enabling and
-disabling a regulator, and all need a handle on their GPIO
-descriptor.
-
-This solution with a special flag is not entirely elegant
-and should ideally be replaced by something more careful as
-this makes it possible for several consumers to
-enable/disable the same GPIO line to the left and right
-without any consistency. The current use inside the regulator
-core should however be fine as it takes special care to
-handle this.
-
-For the state of the GPIO backend, this is still the
-lesser evil compared to going back to global GPIO
-numbers.
-
-Cc: Marek Szyprowski <m.szyprowski@samsung.com>
-Cc: Jon Hunter <jonathanh@nvidia.com>
-Fixes: efdfeb079cc3 ("regulator: fixed: Convert to use GPIO descriptor only")
-Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
-Tested-by: Jon Hunter <jonathanh@nvidia.com>
-Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
-Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
-Signed-off-by: Mark Brown <broonie@kernel.org>
----
- drivers/gpio/gpiolib.c        | 19 +++++++++++++++++--
- include/linux/gpio/consumer.h |  1 +
- 2 files changed, 18 insertions(+), 2 deletions(-)
-
---- a/drivers/gpio/gpiolib.c
-+++ b/drivers/gpio/gpiolib.c
-@@ -3988,8 +3988,23 @@ struct gpio_desc *__must_check gpiod_get
-        * the device name as label
-        */
-       status = gpiod_request(desc, con_id ? con_id : devname);
--      if (status < 0)
--              return ERR_PTR(status);
-+      if (status < 0) {
-+              if (status == -EBUSY && flags & GPIOD_FLAGS_BIT_NONEXCLUSIVE) {
-+                      /*
-+                       * This happens when there are several consumers for
-+                       * the same GPIO line: we just return here without
-+                       * further initialization. It is a bit if a hack.
-+                       * This is necessary to support fixed regulators.
-+                       *
-+                       * FIXME: Make this more sane and safe.
-+                       */
-+                      dev_info(dev, "nonexclusive access to GPIO for %s\n",
-+                               con_id ? con_id : devname);
-+                      return desc;
-+              } else {
-+                      return ERR_PTR(status);
-+              }
-+      }
- 
-       status = gpiod_configure_flags(desc, con_id, lookupflags, flags);
-       if (status < 0) {
---- a/include/linux/gpio/consumer.h
-+++ b/include/linux/gpio/consumer.h
-@@ -30,6 +30,7 @@ struct gpio_descs {
- #define GPIOD_FLAGS_BIT_DIR_OUT               BIT(1)
- #define GPIOD_FLAGS_BIT_DIR_VAL               BIT(2)
- #define GPIOD_FLAGS_BIT_OPEN_DRAIN    BIT(3)
-+#define GPIOD_FLAGS_BIT_NONEXCLUSIVE  BIT(4)
- 
- /**
-  * Optional flags that can be passed to one of gpiod_* to configure direction