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Groups > linux.kernel > #1433575

[PATCH v2 1/2] clk: hi6220: Change syspll and media_syspll clk to 1.19GHz

From Guodong Xu <guodong.xu@linaro.org>
Newsgroups linux.kernel
Subject [PATCH v2 1/2] clk: hi6220: Change syspll and media_syspll clk to 1.19GHz
Date 2016-06-29 10:50 +0200
Message-ID <rPjm1-1VD-17@gated-at.bofh.it> (permalink)
Organization linux.* mail to news gateway

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From: Xinliang Liu <xinliang.liu@linaro.org>

In the bootloader of HiKey/96boards, syspll and media_syspll clk
was initialized to 1.19GHz. So, here changes it in kernel accordingly.

1.19GHz was chosen over 1.2GHz because at 1.19GHz we get more precise
HDMI pixel clock (1.19G/16 = 74.4MHz) for 1280x720p@60Hz HDMI
(74.25MHz required by standards). Closer pixel clock means better
compatibility to HDMI monitors.

Signed-off-by: Guodong Xu <guodong.xu@linaro.org>
Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
---
 drivers/clk/hisilicon/clk-hi6220.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/hisilicon/clk-hi6220.c b/drivers/clk/hisilicon/clk-hi6220.c
index f02cb41..a36ffcb 100644
--- a/drivers/clk/hisilicon/clk-hi6220.c
+++ b/drivers/clk/hisilicon/clk-hi6220.c
@@ -34,8 +34,8 @@ static struct hisi_fixed_rate_clock hi6220_fixed_rate_clks[] __initdata = {
 	{ HI6220_PLL_BBP,	"bbppll0",	NULL, 0, 245760000, },
 	{ HI6220_PLL_GPU,	"gpupll",	NULL, 0, 1000000000,},
 	{ HI6220_PLL1_DDR,	"ddrpll1",	NULL, 0, 1066000000,},
-	{ HI6220_PLL_SYS,	"syspll",	NULL, 0, 1200000000,},
-	{ HI6220_PLL_SYS_MEDIA,	"media_syspll",	NULL, 0, 1200000000,},
+	{ HI6220_PLL_SYS,	"syspll",	NULL, 0, 1190400000,},
+	{ HI6220_PLL_SYS_MEDIA,	"media_syspll",	NULL, 0, 1190400000,},
 	{ HI6220_DDR_SRC,	"ddr_sel_src",  NULL, 0, 1200000000,},
 	{ HI6220_PLL_MEDIA,	"media_pll",    NULL, 0, 1440000000,},
 	{ HI6220_PLL_DDR,	"ddrpll0",      NULL, 0, 1600000000,},
-- 
1.9.1

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[PATCH v2 1/2] clk: hi6220: Change syspll and media_syspll clk to 1.19GHz Guodong Xu <guodong.xu@linaro.org> - 2016-06-29 10:50 +0200
  Re: [PATCH v2 1/2] clk: hi6220: Change syspll and media_syspll clk to 1.19GHz Michael Turquette <mturquette@baylibre.com> - 2016-07-07 00:30 +0200

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