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List: linux-backports
Subject: [PATCH] backport: declare GPIO own_desc functions if GPIOLIB is not defined
From: Luca Coelho <luca () coelho ! fi>
Date: 2020-12-16 14:26:34
Message-ID: 20201216142634.1625546-1-luca () coelho ! fi
[Download RAW message or body]
From: Luca Coelho <luciano.coelho@intel.com>
In kernels older than v5.4, the gpiochip_request_own_desc() and the
gpiochip_free_own_desc() functions are declared inside a
CONFIG_GPIOLIB ifdef, so we need to declare them in our implementation
to avoid compilation problems.
Change-Id: Ic6da0d7ff9d99c64d110da63fb950fb555fd2782
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
backport/compat/backport-5.3.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/backport/compat/backport-5.3.c b/backport/compat/backport-5.3.c
index f501448e24cd..46e6a11d8da3 100644
--- a/backport/compat/backport-5.3.c
+++ b/backport/compat/backport-5.3.c
@@ -45,6 +45,17 @@ static int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
}
#undef gpiochip_request_own_desc
+
+/* In kernels older than 5.4, these function declarations are inside a
+ * CONFIG_GPIOLIB ifdef, so we need to declare them here.
+ */
+#ifndef CONFIG_GPIOLIB
+extern struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *chip,
+ u16 hwnum,
+ const char *label);
+void gpiochip_free_own_desc(struct gpio_desc *desc);
+#endif /* CONFIG_GPIOLIB */
+
struct gpio_desc *backport_gpiochip_request_own_desc(struct gpio_chip *gc,
unsigned int hwnum,
const char *label,
--
2.29.2
--
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