From 726bd223105c04f7bf5eacdc2540819c301061f7 Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Mon, 1 May 2017 09:38:13 +0200 Subject: powerpc/8xx: Adding support of IRQ in MPC8xx GPIO This patch allows the use of IRQ to notify the change of GPIO status on MPC8xx CPM IO ports. This then allows to associate IRQs to GPIOs in the Device Tree. Ex: CPM1_PIO_C: gpio-controller@960 { #gpio-cells = <2>; compatible = "fsl,cpm1-pario-bank-c"; reg = <0x960 0x10>; fsl,cpm1-gpio-irq-mask = <0x0fff>; interrupts = <1 2 6 9 10 11 14 15 23 24 26 31>; interrupt-parent = <&CPM_PIC>; gpio-controller; }; The property 'fsl,cpm1-gpio-irq-mask' defines which of the 16 GPIOs have the associated interrupts defined in the 'interrupts' property. Signed-off-by: Christophe Leroy Signed-off-by: Scott Wood --- arch/powerpc/include/asm/cpm1.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/cpm1.h b/arch/powerpc/include/asm/cpm1.h index 8ee4211ca0c6..14ad37865000 100644 --- a/arch/powerpc/include/asm/cpm1.h +++ b/arch/powerpc/include/asm/cpm1.h @@ -560,6 +560,8 @@ typedef struct risc_timer_pram { #define CPM_PIN_SECONDARY 2 #define CPM_PIN_GPIO 4 #define CPM_PIN_OPENDRAIN 8 +#define CPM_PIN_FALLEDGE 16 +#define CPM_PIN_ANYEDGE 0 enum cpm_port { CPM_PORTA, -- cgit v1.2.3 From 61baf15555129f69720334f232b153890895ef71 Mon Sep 17 00:00:00 2001 From: Scott Wood Date: Fri, 5 May 2017 01:22:06 -0500 Subject: powerpc/64e: Don't place the stack beyond TASK_SIZE Commit f4ea6dcb08ea ("powerpc/mm: Enable mappings above 128TB") increased the task size on book3s, and introduced a mechanism to dynamically control whether a task uses these larger addresses. While the change to the task size itself was ifdef-protected to only apply on book3s, the change to STACK_TOP_USER64 was not. On book3e, this had the effect of trying to use addresses up to 128TiB for the stack despite a 64TiB task size limit -- which broke 64-bit userspace producing the following errors: Starting init: /sbin/init exists but couldn't execute it (error -14) Starting init: /bin/sh exists but couldn't execute it (error -14) Kernel panic - not syncing: No working init found. Try passing init= option to kernel. See Linux Documentation/admin-guide/init.rst for guidance. Fixes: f4ea6dcb08ea ("powerpc/mm: Enable mappings above 128TB") Cc: Aneesh Kumar K.V Signed-off-by: Scott Wood --- arch/powerpc/include/asm/processor.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index a4b1d8d6b793..a2123f291ab0 100644 --- a/arch/powerpc/include/asm/processor.h +++ b/arch/powerpc/include/asm/processor.h @@ -151,8 +151,13 @@ void release_thread(struct task_struct *); #ifdef __powerpc64__ +#ifdef CONFIG_PPC_BOOK3S_64 /* Limit stack to 128TB */ #define STACK_TOP_USER64 TASK_SIZE_128TB +#else +#define STACK_TOP_USER64 TASK_SIZE_USER64 +#endif + #define STACK_TOP_USER32 TASK_SIZE_USER32 #define STACK_TOP (is_32bit_task() ? \ -- cgit v1.2.3