From 0d9839b3334d7769e1d89ebc68e01d91e5672c74 Mon Sep 17 00:00:00 2001 From: Shunqian Zheng Date: Wed, 11 May 2016 15:18:17 +0800 Subject: rockchip: gru: update the hynix lpddr3 config to run at 928MHz Update the DDR config and DRAM driver to allow running at up to 928MHz. Kevin config/clock rate are not being changed, but Gru now runs at 928 MHz. BRANCH=none BUG=chrome-os-partner:51537 TEST=booted Kevin and Gru to Linux prompt. Ran stressapptest for 10 min on Gru, Change-Id: I66c1a171d5c7d05b2878c7bc5eaa0d436c7a1be2 Signed-off-by: Martin Roth Original-Commit-Id: 8baf0d82816a7ea1c4428e15caeefa2795d001f9 Original-Change-Id: I5e1d6d1025f10203da8f11afc3bbdf95f133c586 Original-Signed-off-by: Shunqian Zheng Original-Signed-off-by: Vadim Bendebury Original-Reviewed-on: https://chromium-review.googlesource.com/343984 Original-Reviewed-by: Stephen Barber Reviewed-on: https://review.coreboot.org/15027 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh --- src/soc/rockchip/rk3399/clock.c | 4 ++++ src/soc/rockchip/rk3399/sdram.c | 2 +- 2 files changed, 5 insertions(+), 1 deletion(-) (limited to 'src/soc/rockchip') diff --git a/src/soc/rockchip/rk3399/clock.c b/src/soc/rockchip/rk3399/clock.c index 6222b77730..ba66230e23 100644 --- a/src/soc/rockchip/rk3399/clock.c +++ b/src/soc/rockchip/rk3399/clock.c @@ -549,6 +549,10 @@ void rkclk_configure_ddr(unsigned int hz) dpll_cfg = (struct pll_div) {.refdiv = 1, .fbdiv = 100, .postdiv1 = 3, .postdiv2 = 1}; break; + case 928*MHz: + dpll_cfg = (struct pll_div) + {.refdiv = 1, .fbdiv = 116, .postdiv1 = 3, .postdiv2 = 1}; + break; default: die("Unsupported SDRAM frequency, add to clock.c!"); } diff --git a/src/soc/rockchip/rk3399/sdram.c b/src/soc/rockchip/rk3399/sdram.c index 83c0ee6255..1536910e2c 100644 --- a/src/soc/rockchip/rk3399/sdram.c +++ b/src/soc/rockchip/rk3399/sdram.c @@ -819,7 +819,7 @@ void sdram_init(const struct rk3399_sdram_params *sdram_params) if ((sdram_params->dramtype == DDR3 && sdram_params->ddr_freq > 800*MHz) || (sdram_params->dramtype == LPDDR3 - && sdram_params->ddr_freq > 800*MHz) || + && sdram_params->ddr_freq > 928*MHz) || (sdram_params->dramtype == LPDDR4 && sdram_params->ddr_freq > 800*MHz)) die("SDRAM frequency is to high!"); -- cgit v1.2.3