diff options
| author | Simon Horman <horms+renesas@verge.net.au> | 2014-05-15 20:32:01 +0900 |
|---|---|---|
| committer | Simon Horman <horms+renesas@verge.net.au> | 2014-06-17 19:56:18 +0900 |
| commit | 3e05f24aa95bb043f1103b41392b61ce83d2675e (patch) | |
| tree | fabff2f4596eeec7f4eb0b6baf2a88b172143a9f | |
| parent | 3325cbe8ab74731c88e70d172ffef74cbca13f18 (diff) | |
ARM: shmobile: r8a7779: Add helper to read mode pins
Add and use helper to read mode pins.
This will be re-used when moving marzen-reference to
the common clock framework.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
| -rw-r--r-- | arch/arm/mach-shmobile/clock-r8a7779.c | 11 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/include/mach/r8a7779.h | 1 | ||||
| -rw-r--r-- | arch/arm/mach-shmobile/setup-r8a7779.c | 18 |
3 files changed, 21 insertions, 9 deletions
diff --git a/arch/arm/mach-shmobile/clock-r8a7779.c b/arch/arm/mach-shmobile/clock-r8a7779.c index d81539a26dbd..5dd66a21f036 100644 --- a/arch/arm/mach-shmobile/clock-r8a7779.c +++ b/arch/arm/mach-shmobile/clock-r8a7779.c @@ -23,6 +23,7 @@ #include <linux/io.h> #include <linux/sh_clk.h> #include <linux/clkdev.h> +#include <mach/r8a7779.h> #include "clock.h" #include "common.h" @@ -52,9 +53,6 @@ #define MSTPCR3 IOMEM(0xffc8003c) #define MSTPSR1 IOMEM(0xffc80044) -#define MODEMR 0xffcc0020 - - /* ioremap() through clock mapping mandatory to avoid * collision with ARM coherent DMA virtual memory range. */ @@ -207,14 +205,9 @@ static struct clk_lookup lookups[] = { void __init r8a7779_clock_init(void) { - void __iomem *modemr = ioremap_nocache(MODEMR, PAGE_SIZE); - u32 mode; + u32 mode = r8a7779_read_mode_pins(); int k, ret = 0; - BUG_ON(!modemr); - mode = ioread32(modemr); - iounmap(modemr); - if (mode & MD(1)) { plla_clk.rate = 1500000000; diff --git a/arch/arm/mach-shmobile/include/mach/r8a7779.h b/arch/arm/mach-shmobile/include/mach/r8a7779.h index def10a29e09a..5ef0bad6334d 100644 --- a/arch/arm/mach-shmobile/include/mach/r8a7779.h +++ b/arch/arm/mach-shmobile/include/mach/r8a7779.h @@ -20,6 +20,7 @@ extern void r8a7779_add_early_devices(void); extern void r8a7779_add_standard_devices(void); extern void r8a7779_add_standard_devices_dt(void); extern void r8a7779_init_late(void); +extern u32 r8a7779_read_mode_pins(void); extern void r8a7779_clock_init(void); extern void r8a7779_pinmux_init(void); extern void r8a7779_pm_init(void); diff --git a/arch/arm/mach-shmobile/setup-r8a7779.c b/arch/arm/mach-shmobile/setup-r8a7779.c index 86ec4b625a78..25e1d0b72463 100644 --- a/arch/arm/mach-shmobile/setup-r8a7779.c +++ b/arch/arm/mach-shmobile/setup-r8a7779.c @@ -762,6 +762,24 @@ void __init r8a7779_add_standard_devices_dt(void) of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); } +#define MODEMR 0xffcc0020 + +u32 __init r8a7779_read_mode_pins(void) +{ + static u32 mode; + static bool mode_valid; + + if (!mode_valid) { + void __iomem *modemr = ioremap_nocache(MODEMR, PAGE_SIZE); + BUG_ON(!modemr); + mode = ioread32(modemr); + iounmap(modemr); + mode_valid = true; + } + + return mode; +} + static const char *r8a7779_compat_dt[] __initdata = { "renesas,r8a7779", NULL, |