Re: [PATCH -next] arm: Select GPIO_GENERIC_PLATFORM for CRAGG_6410

From: Guenter Roeck
Date: Mon Jan 11 2016 - 20:24:54 EST


On 01/11/2016 04:52 PM, Krzysztof Kozlowski wrote:
On 12.01.2016 02:00, Guenter Roeck wrote:
Since commit 0f4630f3720e ("gpio: generic: factor into gpio_chip struct"),
all users of struct bgpio_pdata depend on GPIO_GENERIC.

This results in the following build error.

arch/arm/mach-s3c64xx/mach-crag6410.c:270:3: warning:
excess elements in struct initializer
arch/arm/mach-s3c64xx/mach-crag6410.c:270:3: warning:
(near initialization for '(anonymous)')
arch/arm/mach-s3c64xx/mach-crag6410.c:271:2: error:
invalid use of undefined type 'struct bgpio_pdata'

Fixes: 0f4630f3720e ("gpio: generic: factor into gpio_chip struct")
Cc: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
I don't know if this is the correct way to fix this problem.
If not, please consider this to be a bug report.

arch/arm/mach-s3c64xx/Kconfig | 1 +
1 file changed, 1 insertion(+)


Thanks for the report! I think that:

1. Other boards using the bgpio_pdata might be also affected:
mach-clps711x/board-autcpu12.c
mach-clps711x/board-p720t.c
mach-imx/mach-mx21ads.c

2. The boards does not directly depend on the GPIO_GENERIC.
If GPIO_GENERIC is not selected then it still might create
a basic-mmio-gpio device. The device of course won't be in
such case supported by any driver.


Instead to solve the error the structure should be
always visible so:


-- >8 --
From: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
Date: Tue, 12 Jan 2016 09:46:06 +0900
Subject: [PATCH] gpio: generic: Fix build error of missing bgpio_pdata
declaration

Commit 0f4630f3720e ("gpio: generic: factor into gpio_chip struct")
introduced struct bgpio_pdata along with users but made the declaration
hidden by CONFIG_GPIO_GENERIC.

This results in the following build error:

arch/arm/mach-s3c64xx/mach-crag6410.c:270:3: warning: excess elements in struct initializer
arch/arm/mach-s3c64xx/mach-crag6410.c:270:3: warning: (near initialization for '(anonymous)')
arch/arm/mach-s3c64xx/mach-crag6410.c:271:2: error: invalid use of undefined type 'struct bgpio_pdata'

Fixes: 0f4630f3720e ("gpio: generic: factor into gpio_chip struct")
Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>

Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx>

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
---
include/linux/gpio/driver.h | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index e2d05fd0e6e3..7b9054366e7a 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -220,14 +220,13 @@ static inline void *gpiochip_get_data(struct gpio_chip *chip)

struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc);

-#if IS_ENABLED(CONFIG_GPIO_GENERIC)
-
struct bgpio_pdata {
const char *label;
int base;
int ngpio;
};

+#if IS_ENABLED(CONFIG_GPIO_GENERIC)
int bgpio_init(struct gpio_chip *gc, struct device *dev,
unsigned long sz, void __iomem *dat, void __iomem *set,
void __iomem *clr, void __iomem *dirout, void __iomem *dirin,