Messages in this thread Patch in this message | | | From | Matthew Garrett <> | Subject | [PATCH V2 1/2] gmux: Add generic write32 function | Date | Mon, 13 Aug 2012 18:52:48 -0400 |
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Move the special-cased backlight update function to a generic gmux_write32 function.
Signed-off-by: Matthew Garrett <mjg@redhat.com> Cc: Seth Forshee <seth.forshee@canonical.com> ---
Fixed the typo and irrelevant hunk
drivers/platform/x86/apple-gmux.c | 23 +++++++++++++---------- 1 file changed, 13 insertions(+), 10 deletions(-)
diff --git a/drivers/platform/x86/apple-gmux.c b/drivers/platform/x86/apple-gmux.c index 905fa01..c9db5072 100644 --- a/drivers/platform/x86/apple-gmux.c +++ b/drivers/platform/x86/apple-gmux.c @@ -75,6 +75,18 @@ static inline u32 gmux_read32(struct apple_gmux_data *gmux_data, int port) return inl(gmux_data->iostart + port); } +static inline u32 gmux_write32(struct apple_gmux_data *gmux_data, int port, + u32 val) +{ + int i; + u8 tmpval; + + for (i = 0; i < 4; i++) { + tmpval = (val >> (i * 8)) & 0xff; + outb(tmpval, port + i); + } +} + static int gmux_get_brightness(struct backlight_device *bd) { struct apple_gmux_data *gmux_data = bl_get_data(bd); @@ -90,16 +102,7 @@ static int gmux_update_status(struct backlight_device *bd) if (bd->props.state & BL_CORE_SUSPENDED) return 0; - /* - * Older gmux versions require writing out lower bytes first then - * setting the upper byte to 0 to flush the values. Newer versions - * accept a single u32 write, but the old method also works, so we - * just use the old method for all gmux versions. - */ - gmux_write8(gmux_data, GMUX_PORT_BRIGHTNESS, brightness); - gmux_write8(gmux_data, GMUX_PORT_BRIGHTNESS + 1, brightness >> 8); - gmux_write8(gmux_data, GMUX_PORT_BRIGHTNESS + 2, brightness >> 16); - gmux_write8(gmux_data, GMUX_PORT_BRIGHTNESS + 3, 0); + gmux_write32(gmux_data, GMUX_PORT_BRIGHTNESS, brightness); return 0; } -- 1.7.11.2
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