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| author | Robert Jarzmik <robert.jarzmik@free.fr> | 2011-12-11 13:59:27 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2011-12-12 15:44:23 +0100 |
| commit | 905f3ccbd4e074d99461bd547dad63a04a9abf42 (patch) | |
| tree | 0a05c6dfc5514b9095788647582a5cb730787f1d /arch/arm/mach-pxa/speed-pxa27x.c | |
| parent | b2c6ef5d7e7b092544591b9770ab0d7b37a74d8d (diff) | |
| download | barebox-905f3ccbd4e074d99461bd547dad63a04a9abf42.tar.gz barebox-905f3ccbd4e074d99461bd547dad63a04a9abf42.tar.xz | |
drivers/video: add PXA framebuffer support
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-pxa/speed-pxa27x.c')
| -rw-r--r-- | arch/arm/mach-pxa/speed-pxa27x.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/speed-pxa27x.c b/arch/arm/mach-pxa/speed-pxa27x.c index e8d147fc5d..0317d539a1 100644 --- a/arch/arm/mach-pxa/speed-pxa27x.c +++ b/arch/arm/mach-pxa/speed-pxa27x.c @@ -18,3 +18,27 @@ unsigned long pxa_get_uartclk(void) { return 14857000; } + +/* + * Return the current LCD clock frequency in units of 10kHz as + */ +static unsigned int pxa_get_lcdclk_10khz(void) +{ + unsigned long ccsr; + unsigned int l, L, k, K; + + ccsr = CCSR; + + l = ccsr & 0x1f; + k = (l <= 7) ? 1 : (l <= 16) ? 2 : 4; + + L = l * BASE_CLK; + K = L / k; + + return (K / 10000); +} + +unsigned long pxa_get_lcdclk(void) +{ + return pxa_get_lcdclk_10khz() * 10000; +} |