diff options
| author | Johan Hovold <jhovold@gmail.com> | 2013-03-12 20:21:34 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-20 13:10:54 -0700 |
| commit | 7be4a00d5c4aaef6e47e8e4032aaf015e76ae6a4 (patch) | |
| tree | 12d14adce387831654f8990556397bd1279bc0ab /arch/arm/mach-at91 | |
| parent | 6ec54bb6040ff10c575c505c564182841e0dda1e (diff) | |
ARM: w1-gpio: fix erroneous gpio requests
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>
Diffstat (limited to 'arch/arm/mach-at91')
| -rw-r--r-- | arch/arm/mach-at91/board-foxg20.c | 1 | ||||
| -rw-r--r-- | arch/arm/mach-at91/board-stamp9g20.c | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/board-foxg20.c b/arch/arm/mach-at91/board-foxg20.c index 191d37c16ba..1478294ae37 100644 --- 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_gpio_pdata = { /* 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 = { diff --git a/arch/arm/mach-at91/board-stamp9g20.c b/arch/arm/mach-at91/board-stamp9g20.c index 48a962b61fa..58a675868be 100644 --- 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_spi_devices[] = { 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 = { |