[ 31/75] ARM: w1-gpio: fix erroneous gpio requests

Greg Kroah-Hartman
2013-03-18T21:57:28Z

From: Johan Hovold <jhovold@gmail.com>

commit 2d798a3f20ae992b0b69a2b68c04ada397c32ed4 upstream.

Fix regression introduced by commit d2323cf773 ("onewire: w1-gpio: add
ext_pullup_enable pin in platform data") which added a gpio entry to the
platform data, but did not add the required initialisers to the board
files using it. Consequently, the driver would request gpio 0 at probe,
which could break other uses of the corresponding pin.

On AT91 requesting gpio 0 changes the pin muxing for PIOA0, which, for
instance, breaks SPI0 on at91sam9g20.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/arm/mach-at91/board-foxg20.c | 1 +
arch/arm/mach-at91/board-stamp9g20.c | 1 +
arch/arm/mach-ixp4xx/vulcan-setup.c | 1 +
arch/arm/mach-pxa/raumfeld.c | 1 +
4 files changed, 4 insertions(+)

--- a/arch/arm/mach-at91/board-foxg20.c
+++ b/arch/arm/mach-at91/board-foxg20.c
@@ -176,6 +176,7 @@ static struct w1_gpio_platform_data w1_g
/* If you choose to use a pin other than PB16 it needs to be 3.3V */
.pin = AT91_PIN_PB16,
.is_open_drain = 1,
+ .ext_pullup_enable_pin = -EINVAL,
};

static struct platform_device w1_device = {
--- a/arch/arm/mach-at91/board-stamp9g20.c
+++ b/arch/arm/mach-at91/board-stamp9g20.c
@@ -188,6 +188,7 @@ static struct spi_board_info portuxg20_s
static struct w1_gpio_platform_data w1_gpio_pdata = {
.pin = AT91_PIN_PA29,
.is_open_drain = 1,
+ .ext_pullup_enable_pin = -EINVAL,
};

static struct platform_device w1_device = {
--- a/arch/arm/mach-ixp4xx/vulcan-setup.c
+++ b/arch/arm/mach-ixp4xx/vulcan-setup.c
@@ -163,6 +163,7 @@ static struct platform_device vulcan_max

static struct w1_gpio_platform_data vulcan_w1_gpio_pdata = {
.pin = 14,
+ .ext_pullup_enable_pin = -EINVAL,
};

static struct platform_device vulcan_w1_gpio = {
--- a/arch/arm/mach-pxa/raumfeld.c
+++ b/arch/arm/mach-pxa/raumfeld.c
@@ -505,6 +505,7 @@ static struct w1_gpio_platform_data w1_g
.pin = GPIO_ONE_WIRE,
.is_open_drain = 0,
.enable_external_pullup = w1_enable_external_pullup,
+ .ext_pullup_enable_pin = -EINVAL,
};

struct platform_device raumfeld_w1_gpio_device = {