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authorHaojian Zhuang <haojian.zhuang@marvell.com>2009-07-15 19:47:24 +0800
committerEric Miao <eric.y.miao@gmail.com>2009-07-18 10:00:08 +0800
commiteb9069119d1c4bc856b4c1339abcad0105691e71 (patch)
tree736bcabcfb9f2e8f36f59391962b8e8b365898be /arch/arm/mach-pxa/zylonite_pxa300.c
parent22fe84394f405c673b362d23dcc2d5d095ab5f6c (diff)
[ARM] pxa: fix gpio issue in zylonite
WARNING: at drivers/gpio/gpiolib.c:83 gpio_ensure_requested+0x58/0xbc() autorequest GPIO-71 Modules linked in: [<c0028bd0>] (unwind_backtrace+0x0/0xe8) from [<c003c328>] (warn_slowpath_common+0x48/0x78) [<c003c328>] (warn_slowpath_common+0x48/0x78) from [<c003c394>] (warn_slowpath_fmt+0x28/0x38) [<c003c394>] (warn_slowpath_fmt+0x28/0x38) from [<c0146128>] (gpio_ensure_requested+0x58/0xbc) [<c0146128>] (gpio_ensure_requested+0x58/0xbc) from [<c0146308>] (gpio_direction_input+0x80/0xf4) [<c0146308>] (gpio_direction_input+0x80/0xf4) from [<c000c668>] (zylonite_pxa300_init+0x108/0x214) [<c000c668>] (zylonite_pxa300_init+0x108/0x214) from [<c000c4e4>] (zylonite_init+0x8/0x84) [<c000c4e4>] (zylonite_init+0x8/0x84) from [<c00097cc>] (customize_machine+0x18/0x24) [<c00097cc>] (customize_machine+0x18/0x24) from [<c00222e0>] (do_one_initcall+0x30/0x1b0) [<c00222e0>] (do_one_initcall+0x30/0x1b0) from [<c00083f4>] (kernel_init+0xa4/0x11c) [<c00083f4>] (kernel_init+0xa4/0x11c) from [<c0023f3c>] (kernel_thread_exit+0x0/0x8) ---[ end trace 1b75b31a2719ed1c ]--- This issue is caused by using gpio pin without request. Add gpio_request() into zylonite. To simplify the code, error checking is omitted since this is being performed early. Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com> Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
Diffstat (limited to 'arch/arm/mach-pxa/zylonite_pxa300.c')
-rw-r--r--arch/arm/mach-pxa/zylonite_pxa300.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/zylonite_pxa300.c b/arch/arm/mach-pxa/zylonite_pxa300.c
index cefd1c0a854a..84095440a878 100644
--- a/arch/arm/mach-pxa/zylonite_pxa300.c
+++ b/arch/arm/mach-pxa/zylonite_pxa300.c
@@ -197,10 +197,12 @@ static void __init zylonite_detect_lcd_panel(void)
for (i = 0; i < NUM_LCD_DETECT_PINS; i++) {
id = id << 1;
gpio = mfp_to_gpio(lcd_detect_pins[i]);
+ gpio_request(gpio, "LCD_ID_PINS");
gpio_direction_input(gpio);
if (gpio_get_value(gpio))
id = id | 0x1;
+ gpio_free(gpio);
}
/* lcd id, flush out bit 1 */