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| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2010-11-02 12:27:34 +0100 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-11-10 09:59:43 +0100 |
| commit | 640dcfa0ff49ea1fcddad39e7c468683d9f00342 (patch) | |
| tree | 1905072e89e68e99872592ff525ea9ccece3c520 /arch/arm/mach-shmobile | |
| parent | fbdev: sh_mobile_hdmi: fix up compiler warnings. (diff) | |
| download | linux-640dcfa0ff49ea1fcddad39e7c468683d9f00342.tar.xz linux-640dcfa0ff49ea1fcddad39e7c468683d9f00342.zip | |
ARM: mach-shmobile: optimize PLLC2 frequency for HDMI
On ap4evb PLLC2 is only used as a parent of the HDMI clock, therefore it can
be reconfigured freely to improve HDMI clock precision.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/arm/mach-shmobile')
| -rw-r--r-- | arch/arm/mach-shmobile/board-ap4evb.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c index 32d9e2816e56..732baed08578 100644 --- a/arch/arm/mach-shmobile/board-ap4evb.c +++ b/arch/arm/mach-shmobile/board-ap4evb.c @@ -669,10 +669,15 @@ static struct platform_device lcdc1_device = { }, }; +static long ap4evb_clk_optimize(unsigned long target, unsigned long *best_freq, + unsigned long *parent_freq); + + static struct sh_mobile_hdmi_info hdmi_info = { .lcd_chan = &sh_mobile_lcdc1_info.ch[0], .lcd_dev = &lcdc1_device.dev, .flags = HDMI_SND_SRC_SPDIF, + .clk_optimize_parent = ap4evb_clk_optimize, }; static struct resource hdmi_resources[] = { @@ -699,6 +704,25 @@ static struct platform_device hdmi_device = { }, }; +static long ap4evb_clk_optimize(unsigned long target, unsigned long *best_freq, + unsigned long *parent_freq) +{ + struct clk *hdmi_ick = clk_get(&hdmi_device.dev, "ick"); + long error; + + if (IS_ERR(hdmi_ick)) { + int ret = PTR_ERR(hdmi_ick); + pr_err("Cannot get HDMI ICK: %d\n", ret); + return ret; + } + + error = clk_round_parent(hdmi_ick, target, best_freq, parent_freq, 1, 64); + + clk_put(hdmi_ick); + + return error; +} + static struct gpio_led ap4evb_leds[] = { { .name = "led4", |