diff mbox

clk: rockchip: optimize the configuration for 800MHz and 1GHz on RK3399

Message ID 1477970526-26388-1-git-send-email-zhengxing@rock-chips.com (mailing list archive)
State New, archived
Headers show

Commit Message

zhengxing Nov. 1, 2016, 3:22 a.m. UTC 
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(-)

Comments

Heiko Stübner Nov. 1, 2016, 11:25 p.m. UTC | #1 
Am Dienstag, 1. November 2016, 11:22:06 CET schrieb Xing Zheng:
> 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>

applied to my clk-branch for 4.10


Thanks
Heiko
diff mbox

Patch

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),