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@xxxxxx>
---
v2: now using the generic sh clock-framework function
arch/arm/mach-shmobile/board-ap4evb.c | 23 +++++++++++++++++++++++
1 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c
index 46ca4d4..f01ba9f 100644
--- a/arch/arm/mach-shmobile/board-ap4evb.c
+++ b/arch/arm/mach-shmobile/board-ap4evb.c
@@ -631,9 +631,13 @@ 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,
+ .clk_optimize_parent = ap4evb_clk_optimize,
};
static struct resource hdmi_resources[] = {
@@ -660,6 +664,25 @@ 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",
--
1.7.2.3
--
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