diff options
| author | Magnus Damm <damm@igel.co.jp> | 2008-12-25 18:17:09 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-01-27 14:49:09 +0900 |
| commit | 18801be7f805b891876a6676ec7fac2e1acdec13 (patch) | |
| tree | 71b4366a89ac25980dc16bc1b33fbc6943f1155c /arch/sh/include | |
| parent | 5376071069ec8a7e6a8112beab16fc24f5139475 (diff) | |
| download | blackbird-op-linux-18801be7f805b891876a6676ec7fac2e1acdec13.tar.gz blackbird-op-linux-18801be7f805b891876a6676ec7fac2e1acdec13.zip | |
sh: make gpio_get/set_value() O(1)
This patch modifies the table based SuperH gpio implementation to
make use of direct table lookups. With this change the functions
gpio_get_value() and gpio_set_value() are O(1).
Tested on Migo-R using bitbanging mmc. Performance is improved from
11 KBytes/s to 26 Kbytes/s.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/include')
| -rw-r--r-- | arch/sh/include/asm/gpio.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/sh/include/asm/gpio.h b/arch/sh/include/asm/gpio.h index 90673658eb14..942fefa61c7e 100644 --- a/arch/sh/include/asm/gpio.h +++ b/arch/sh/include/asm/gpio.h @@ -20,7 +20,7 @@ #endif typedef unsigned short pinmux_enum_t; -typedef unsigned char pinmux_flag_t; +typedef unsigned short pinmux_flag_t; #define PINMUX_TYPE_NONE 0 #define PINMUX_TYPE_FUNCTION 1 @@ -34,6 +34,11 @@ typedef unsigned char pinmux_flag_t; #define PINMUX_FLAG_WANT_PULLUP (1 << 3) #define PINMUX_FLAG_WANT_PULLDOWN (1 << 4) +#define PINMUX_FLAG_DBIT_SHIFT 5 +#define PINMUX_FLAG_DBIT (0x1f << PINMUX_FLAG_DBIT_SHIFT) +#define PINMUX_FLAG_DREG_SHIFT 10 +#define PINMUX_FLAG_DREG (0x3f << PINMUX_FLAG_DREG_SHIFT) + struct pinmux_gpio { pinmux_enum_t enum_id; pinmux_flag_t flags; |
