From 682e09ff9f3514e79ee3382988b74f63b4bdd06b Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Sat, 17 Sep 2016 03:33:11 +0900 Subject: ARM: uniphier: add PLL init code for LD20 SoC Initialize the DPLL (PLL for DRAM) in SPL, and others in U-Boot proper. Split the common code into pll-base-ld20.c for easier re-use. Signed-off-by: Masahiro Yamada --- arch/arm/mach-uniphier/clk/pll-ld20.c | 40 +++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 arch/arm/mach-uniphier/clk/pll-ld20.c (limited to 'arch/arm/mach-uniphier/clk/pll-ld20.c') diff --git a/arch/arm/mach-uniphier/clk/pll-ld20.c b/arch/arm/mach-uniphier/clk/pll-ld20.c new file mode 100644 index 0000000..5e545da --- /dev/null +++ b/arch/arm/mach-uniphier/clk/pll-ld20.c @@ -0,0 +1,40 @@ +/* + * Copyright (C) 2016 Socionext Inc. + * Author: Masahiro Yamada + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include + +#include "../init.h" +#include "../sc64-regs.h" +#include "pll.h" + +int uniphier_ld20_pll_init(const struct uniphier_board_data *bd) +{ + unsigned int dpll_ssc_rate = UNIPHIER_BD_DPLL_SSC_GET_RATE(bd->flags); + + uniphier_ld20_sscpll_init(SC_CPLLCTRL, UNIPHIER_PLL_FREQ_DEFAULT, 0, 4); + /* do nothing for SPLL */ + uniphier_ld20_sscpll_init(SC_SPLL2CTRL, UNIPHIER_PLL_FREQ_DEFAULT, 0, 4); + uniphier_ld20_sscpll_init(SC_MPLLCTRL, UNIPHIER_PLL_FREQ_DEFAULT, 0, 2); + uniphier_ld20_sscpll_init(SC_VPPLLCTRL, UNIPHIER_PLL_FREQ_DEFAULT, 0, 4); + uniphier_ld20_sscpll_init(SC_GPPLLCTRL, UNIPHIER_PLL_FREQ_DEFAULT, 0, 2); + + mdelay(1); + + if (dpll_ssc_rate > 0) { + uniphier_ld20_sscpll_ssc_en(SC_DPLL0CTRL); + uniphier_ld20_sscpll_ssc_en(SC_DPLL1CTRL); + uniphier_ld20_sscpll_ssc_en(SC_DPLL2CTRL); + } + + uniphier_ld20_vpll27_init(SC_VPLL27FCTRL); + uniphier_ld20_vpll27_init(SC_VPLL27ACTRL); + + uniphier_ld20_dspll_init(SC_VPLL8KCTRL); + uniphier_ld20_dspll_init(SC_A2PLLCTRL); + + return 0; +} -- cgit v1.1