During a reset the gpiolib warns about using the reset gpio without explicit requesting it before:
[ 147.930000] ------------[ cut here ]------------ [ 147.930000] WARNING: at drivers/gpio/gpiolib.c:103 gpio_ensure_requested+0x68/0xcc() [ 147.930000] autorequest GPIO-5 [ 147.930000] Modules linked in: ath5k ath mac80211 ipv6 cfg80211 compat arc4 crypto_blkcipher aead gpio_button_hotplug [ 147.930000] Call Trace: [ 147.930000] [<8004e3bc>] dump_stack+0x8/0x34 [ 147.930000] [<80058430>] warn_slowpath_common+0x78/0xa4 [ 147.930000] [<800584e4>] warn_slowpath_fmt+0x2c/0x38 [ 147.930000] [<80166f18>] gpio_ensure_requested+0x68/0xcc [ 147.930000] [<80167264>] gpio_direction_output+0xdc/0x168 [ 147.930000] [<8004aba8>] ar2315_restart+0x28/0x54 [ 147.930000] [<80069778>] sys_reboot+0x178/0x1c0 [ 147.930000] [<80043670>] stack_done+0x20/0x40 [ 147.930000] [ 147.930000] ---[ end trace 2c7a53d8549562d6 ]--- This is fixed with this patch by using another gpiolib api call which includes the missing request. Signed-off-by: Michael Heimpold <m...@heimpold.de> --- target/linux/atheros/patches-3.10/100-board.patch | 2 +- target/linux/atheros/patches-3.8/100-board.patch | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/target/linux/atheros/patches-3.10/100-board.patch b/target/linux/atheros/patches-3.10/100-board.patch index 5fb3e00..96be80d 100644 --- a/target/linux/atheros/patches-3.10/100-board.patch +++ b/target/linux/atheros/patches-3.10/100-board.patch @@ -2659,7 +2659,7 @@ + /* Cold reset does not work on the AR2315/6, use the GPIO reset bits a workaround. + * give it some time to attempt a gpio based hardware reset + * (atheros reference design workaround) */ -+ gpio_direction_output(AR2315_RESET_GPIO, 0); ++ gpio_request_one(AR2315_RESET_GPIO, GPIOF_OUT_INIT_LOW, "Reset"); + mdelay(100); + + /* Some boards (e.g. Senao EOC-2610) don't implement the reset logic diff --git a/target/linux/atheros/patches-3.8/100-board.patch b/target/linux/atheros/patches-3.8/100-board.patch index 8663156..32667e9 100644 --- a/target/linux/atheros/patches-3.8/100-board.patch +++ b/target/linux/atheros/patches-3.8/100-board.patch @@ -2659,7 +2659,7 @@ + /* Cold reset does not work on the AR2315/6, use the GPIO reset bits a workaround. + * give it some time to attempt a gpio based hardware reset + * (atheros reference design workaround) */ -+ gpio_direction_output(AR2315_RESET_GPIO, 0); ++ gpio_request_one(AR2315_RESET_GPIO, GPIOF_OUT_INIT_LOW, "Reset"); + mdelay(100); + + /* Some boards (e.g. Senao EOC-2610) don't implement the reset logic -- 1.7.10.4 _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
