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sh: Avoid using IRQ0 on SH3 and SH4 

IRQ0 is no longer returned by platform_get_irq() and its ilk -- they now
return -EINVAL instead.  However, the kernel code supporting SH3/4-based
SoCs still maps the IRQ #s starting at 0 -- modify that code to start the
IRQ #s from 16 instead.

The patch should mostly affect the AP-SH4A-3A/AP-SH4AD-0A boards as they
indeed are using IRQ0 for the SMSC911x compatible Ethernet chip.

Fixes: ce753ad154 ("platform: finally disallow IRQ0 in platform_get_irq() and its ilk")
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/r/71105dbf-cdb0-72e1-f9eb-eeda8e321696@omp.ru
Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
This commit is contained in:
Sergey Shtylyov 2023-06-01 23:22:17 +03:00 committed by John Paul Adrian Glaubitz
parent bc9d1f0cec
commit a8ac296114
6 changed files with 9 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/sh/include/mach-common/mach/highlander.h
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@ -176,7 +176,7 @@
#define IVDR_CK_ON 4 /* iVDR Clock ON */
#endif
#define HL_FPGA_IRQ_BASE 200
#define HL_FPGA_IRQ_BASE (200 + 16)
#define HL_NR_IRL 15
#define IRQ_AX88796 (HL_FPGA_IRQ_BASE + 0)

2
arch/sh/include/mach-common/mach/r2d.h
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@ -47,7 +47,7 @@
#define IRLCNTR1 (PA_BCR + 0) /* Interrupt Control Register1 */
#define R2D_FPGA_IRQ_BASE 100
#define R2D_FPGA_IRQ_BASE (100 + 16)
#define IRQ_VOYAGER (R2D_FPGA_IRQ_BASE + 0)
#define IRQ_EXT (R2D_FPGA_IRQ_BASE + 1)

2
arch/sh/include/mach-dreamcast/mach/sysasic.h
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@ -22,7 +22,7 @@
takes.
*/
#define HW_EVENT_IRQ_BASE 48
#define HW_EVENT_IRQ_BASE (48 + 16)
/* IRQ 13 */
#define HW_EVENT_VSYNC (HW_EVENT_IRQ_BASE + 5) /* VSync */

2
arch/sh/include/mach-se/mach/se7724.h
View File

@ -37,7 +37,7 @@
#define IRQ2_IRQ evt2irq(0x640)
/* Bits in IRQ012 registers */
#define SE7724_FPGA_IRQ_BASE 220
#define SE7724_FPGA_IRQ_BASE (220 + 16)
/* IRQ0 */
#define IRQ0_BASE SE7724_FPGA_IRQ_BASE

4
arch/sh/kernel/cpu/sh3/entry.S
View File

@ -470,9 +470,9 @@ ENTRY(handle_interrupt)
mov r4, r0 ! save vector->jmp table offset for later
shlr2 r4 ! vector to IRQ# conversion
add #-0x10, r4
cmp/pz r4 ! is it a valid IRQ?
mov #0x10, r5
cmp/hs r5, r4 ! is it a valid IRQ?
bt 10f
/*

6
include/linux/sh_intc.h
View File

@ -13,9 +13,9 @@
/*
* Convert back and forth between INTEVT and IRQ values.
*/
#ifdef CONFIG_CPU_HAS_INTEVT
#define evt2irq(evt) (((evt) >> 5) - 16)
#define irq2evt(irq) (((irq) + 16) << 5)
#ifdef CONFIG_CPU_HAS_INTEVT /* Avoid IRQ0 (invalid for platform devices) */
#define evt2irq(evt) ((evt) >> 5)
#define irq2evt(irq) ((irq) << 5)
#else
#define evt2irq(evt) (evt)
#define irq2evt(irq) (irq)