diff options
| author | Simon Horman <horms+renesas@verge.net.au> | 2014-05-15 11:32:01 (GMT) |
|---|---|---|
| committer | Simon Horman <horms+renesas@verge.net.au> | 2014-06-17 10:56:18 (GMT) |
| commit | 3e05f24aa95bb043f1103b41392b61ce83d2675e (patch) | |
| tree | fabff2f4596eeec7f4eb0b6baf2a88b172143a9f /arch/arm/mach-shmobile/setup-r8a7779.c | |
| parent | 3325cbe8ab74731c88e70d172ffef74cbca13f18 (diff) | |
| download | linux-3e05f24aa95bb043f1103b41392b61ce83d2675e.tar.xz | |
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>
Diffstat (limited to 'arch/arm/mach-shmobile/setup-r8a7779.c')
| -rw-r--r-- | arch/arm/mach-shmobile/setup-r8a7779.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/setup-r8a7779.c b/arch/arm/mach-shmobile/setup-r8a7779.c index 86ec4b6..25e1d0b 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, |