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| author | Johan Hovold <jhovold@gmail.com> | 2013-03-12 20:21:34 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-13 00:20:45 +0100 |
| commit | 2d798a3f20ae992b0b69a2b68c04ada397c32ed4 (patch) | |
| tree | a8eb78bbbcbf2f2ff7cb1b4f1d07979ad2aaee56 /arch/arm/mach-at91 | |
| parent | Linux 3.9-rc2 (diff) | |
| download | linux-2d798a3f20ae992b0b69a2b68c04ada397c32ed4.tar.xz linux-2d798a3f20ae992b0b69a2b68c04ada397c32ed4.zip | |
ARM: w1-gpio: fix erroneous gpio requests
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.
Cc: stable <stable@vger.kernel.org>
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 2ea7059b840b..c20a870ea9c9 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 a033b8df9fb2..869cbecf00b7 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 = { |