From f4f57c58b5899efbad2f0d9c9dd8d44b0619395e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Heiko=20St=C3=BCbner?= Date: Mon, 20 Mar 2017 12:40:33 +0100 Subject: [PATCH] rockchip: rk3188: Setup the armclk in spl The armclk starts in slow mode (24MHz) on the rk3188, which results in U-Boot startup taking a lot of time (U-Boot itself, but also the rc4 decoding done in the bootrom). With default pmic settings we can always reach a safe frequency of 600MHz which is also the frequency the proprietary loader left the armclk at, without needing access to the systems pmic. Signed-off-by: Heiko Stuebner Acked-by: Simon Glass --- arch/arm/mach-rockchip/rk3188-board-spl.c | 24 +++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/arch/arm/mach-rockchip/rk3188-board-spl.c b/arch/arm/mach-rockchip/rk3188-board-spl.c index 117f6b8f42..c3e174db9e 100644 --- a/arch/arm/mach-rockchip/rk3188-board-spl.c +++ b/arch/arm/mach-rockchip/rk3188-board-spl.c @@ -4,6 +4,7 @@ * SPDX-License-Identifier: GPL-2.0+ */ +#include #include #include #include @@ -76,6 +77,27 @@ u32 spl_boot_mode(const u32 boot_device) return MMCSD_MODE_RAW; } +static int setup_arm_clock(void) +{ + struct udevice *dev; + struct clk clk; + int ret; + + ret = rockchip_get_clk(&dev); + if (ret) + return ret; + + clk.id = CLK_ARM; + ret = clk_request(dev, &clk); + if (ret < 0) + return ret; + + ret = clk_set_rate(&clk, 600000000); + + clk_free(&clk); + return ret; +} + void board_init_f(ulong dummy) { struct udevice *pinctrl, *dev; @@ -144,6 +166,8 @@ void board_init_f(ulong dummy) return; } + setup_arm_clock(); + #if defined(CONFIG_ROCKCHIP_SPL_BACK_TO_BROM) && !defined(CONFIG_SPL_BOARD_INIT) back_to_bootrom(); #endif -- GitLab