From: 黄涛 <huangtao@rock-chips.com>
Date: Sun, 27 May 2012 11:11:44 +0000 (+0800)
Subject: rk30: reset: pll enter slow mode when reset
X-Git-Tag: firefly_0821_release~9142^2~46
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6583eddfe85cec7e19ca1c41f056dbcd3da24643;p=firefly-linux-kernel-4.4.55.git

rk30: reset: pll enter slow mode when reset

slow down core periph. fix unable to boot sometime.
---

diff --git a/arch/arm/mach-rk30/reset.c b/arch/arm/mach-rk30/reset.c
index e2a22ba3eb05..d86811c21d13 100644
--- a/arch/arm/mach-rk30/reset.c
+++ b/arch/arm/mach-rk30/reset.c
@@ -29,6 +29,8 @@ static void rk30_arch_reset(char mode, const char *cmd)
 	dsb();
 	/* disable remap */
 	writel_relaxed(1 << (12 + 16), RK30_GRF_BASE + GRF_SOC_CON0);
+	/* pll enter slow mode */
+	writel_relaxed(PLL_MODE_SLOW(APLL_ID) | PLL_MODE_SLOW(CPLL_ID) | PLL_MODE_SLOW(GPLL_ID), RK30_CRU_BASE + CRU_MODE_CON);
 	dsb();
 	writel_relaxed(0xeca8, RK30_CRU_BASE + CRU_GLB_SRST_SND);
 	dsb();