Messages in this thread Patch in this message | | | From | Jaya Kumar <> | Subject | [RFC 2.6.28 3/3] mach-pxa: use batch set/get in am300epd | Date | Sun, 25 Jan 2009 17:54:49 +0800 |
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This patch to am300epd uses the batch gpiolib set/get API in order to significantly improve performance when transferring framebuffer data.
Cc: David Brownell <david-b@pacbell.net> Cc: Eric Miao <eric.miao@marvell.com> Cc: Paulius Zaleckas <paulius.zaleckas@teltonika.lt> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: linux-arm-kernel@lists.arm.linux.org.uk Cc: linux-fbdev-devel@lists.sourceforge.net Cc: linux-kernel@vger.kernel.org Cc: linux-embedded@vger.kernel.org Signed-off-by: Jaya Kumar <jayakumar.lkml@gmail.com> --- arch/arm/mach-pxa/am300epd.c | 23 ++++++++++++----------- 1 files changed, 12 insertions(+), 11 deletions(-)
diff --git a/arch/arm/mach-pxa/am300epd.c b/arch/arm/mach-pxa/am300epd.c index 4bd10a1..237e3be 100644 --- a/arch/arm/mach-pxa/am300epd.c +++ b/arch/arm/mach-pxa/am300epd.c @@ -187,24 +187,25 @@ static void am300_cleanup(struct broadsheetfb_par *par) static u16 am300_get_hdb(struct broadsheetfb_par *par) { - u16 res = 0; - int i; - - for (i = 0; i <= (DB15_GPIO_PIN - DB0_GPIO_PIN) ; i++) - res |= (gpio_get_value(DB0_GPIO_PIN + i)) ? (1 << i) : 0; + int err; + u32 val; - return res; + err = gpio_get_batch(DB0_GPIO_PIN, 0xFFFF, &val); + if (err) { + dev_err(&am300_device->dev, "get failed: %d\n", err); + return 0; + } + return (u16) val; } static void am300_set_hdb(struct broadsheetfb_par *par, u16 data) { - int i; - - for (i = 0; i <= (DB15_GPIO_PIN - DB0_GPIO_PIN) ; i++) - gpio_set_value(DB0_GPIO_PIN + i, (data >> i) & 0x01); + int err; + err = gpio_set_batch(DB0_GPIO_PIN, 0xFFFF, data); + if (err) + dev_err(&am300_device->dev, "set failed: %d\n", err); } - static void am300_set_ctl(struct broadsheetfb_par *par, unsigned char bit, u8 state) { -- 1.5.2.3
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