diff options
Diffstat (limited to 'target/linux/ar7/patches-4.9/003-MIPS-AR7-defer-registration-of-GPIO.patch')
| -rw-r--r-- | target/linux/ar7/patches-4.9/003-MIPS-AR7-defer-registration-of-GPIO.patch | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/target/linux/ar7/patches-4.9/003-MIPS-AR7-defer-registration-of-GPIO.patch b/target/linux/ar7/patches-4.9/003-MIPS-AR7-defer-registration-of-GPIO.patch new file mode 100644 index 0000000000..f256665baf --- /dev/null +++ b/target/linux/ar7/patches-4.9/003-MIPS-AR7-defer-registration-of-GPIO.patch @@ -0,0 +1,45 @@ +From 3a8d54573f9d187779d36d6b45e8e0288b82c31a Mon Sep 17 00:00:00 2001 +From: Jonas Gorski <jonas.gorski@gmail.com> +Date: Thu, 26 Oct 2017 23:25:44 +0200 +Subject: [PATCH 1/3] MIPS: AR7: defer registration of GPIO + +When called from prom init code, ar7_gpio_init() will fail as it will +call gpiochip_add() which relies on a working kmalloc() to alloc +the gpio_desc array and kmalloc is not useable yet at prom init time. + +Move ar7_gpio_init() to ar7_register_devices() (a device_initcall) +where kmalloc works. + +Fixes: 14e85c0e69d5 ("gpio: remove gpio_descs global array") +Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com> +--- +Text shamelessy stolen from commit 2ec459f2a77b8. + + arch/mips/ar7/platform.c | 4 ++++ + arch/mips/ar7/prom.c | 2 -- + 2 files changed, 4 insertions(+), 2 deletions(-) + +--- a/arch/mips/ar7/platform.c ++++ b/arch/mips/ar7/platform.c +@@ -655,6 +655,10 @@ static int __init ar7_register_devices(v + u32 val; + int res; + ++ res = ar7_gpio_init(); ++ if (res) ++ pr_warn("unable to register gpios: %d\n", res); ++ + res = ar7_register_uarts(); + if (res) + pr_err("unable to setup uart(s): %d\n", res); +--- a/arch/mips/ar7/prom.c ++++ b/arch/mips/ar7/prom.c +@@ -246,8 +246,6 @@ void __init prom_init(void) + ar7_init_cmdline(fw_arg0, (char **)fw_arg1); + ar7_init_env((struct env_var *)fw_arg2); + console_config(); +- +- ar7_gpio_init(); + } + + #define PORT(offset) (KSEG1ADDR(AR7_REGS_UART0 + (offset * 4))) |