lkml.org 
[lkml]   [2016]   [Oct]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] clk: rockchip: optimize the configuration for 800MHz and 1GHz on RK3399
Date
Usually, the 800MHz and 1GHz are supplied for CPLL and NPLL in the RK3399.
But dues to the carelessly copying from RK3036 when the RK3399 bringing up,
the refdiv == 6, it will increase the lock time, and it is not an optimal
configuration.

Please let's fix them for the lock time and jitter are lower:
800 MHz:
- FVCO == 2.4 GHz, revdiv == 1.
1 GHz:
- FVCO == 3 GHz, revdiv == 1.

Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>
---

drivers/clk/rockchip/clk-rk3399.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/rockchip/clk-rk3399.c b/drivers/clk/rockchip/clk-rk3399.c
index a5a3f41..28aff45 100644
--- a/drivers/clk/rockchip/clk-rk3399.c
+++ b/drivers/clk/rockchip/clk-rk3399.c
@@ -77,7 +77,7 @@ static struct rockchip_pll_rate_table rk3399_pll_rates[] = {
RK3036_PLL_RATE(1104000000, 1, 46, 1, 1, 1, 0),
RK3036_PLL_RATE(1100000000, 12, 550, 1, 1, 1, 0),
RK3036_PLL_RATE(1008000000, 1, 84, 2, 1, 1, 0),
- RK3036_PLL_RATE(1000000000, 6, 500, 2, 1, 1, 0),
+ RK3036_PLL_RATE(1000000000, 1, 125, 3, 1, 1, 0),
RK3036_PLL_RATE( 984000000, 1, 82, 2, 1, 1, 0),
RK3036_PLL_RATE( 960000000, 1, 80, 2, 1, 1, 0),
RK3036_PLL_RATE( 936000000, 1, 78, 2, 1, 1, 0),
@@ -87,7 +87,7 @@ static struct rockchip_pll_rate_table rk3399_pll_rates[] = {
RK3036_PLL_RATE( 864000000, 1, 72, 2, 1, 1, 0),
RK3036_PLL_RATE( 840000000, 1, 70, 2, 1, 1, 0),
RK3036_PLL_RATE( 816000000, 1, 68, 2, 1, 1, 0),
- RK3036_PLL_RATE( 800000000, 6, 400, 2, 1, 1, 0),
+ RK3036_PLL_RATE( 800000000, 1, 100, 3, 1, 1, 0),
RK3036_PLL_RATE( 700000000, 6, 350, 2, 1, 1, 0),
RK3036_PLL_RATE( 696000000, 1, 58, 2, 1, 1, 0),
RK3036_PLL_RATE( 676000000, 3, 169, 2, 1, 1, 0),
--
2.7.4

\
 
 \ /
  Last update: 2016-11-01 04:27    [W:2.675 / U:0.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site