diff options
| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2016-09-21 22:42:19 (GMT) |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2016-09-22 16:00:23 (GMT) |
| commit | c72f4d4c2ebb3be9797ef6cd7dcbc2124c825f7a (patch) | |
| tree | 4a31e92876cb55753ac16aac95fb2dbe57236b3d /arch/arm/mach-uniphier/clk/pll-ld11.c | |
| parent | 0298f4c0032e2ba7e417aacc66da98887a2e0a5b (diff) | |
| download | u-boot-fsl-qoriq-c72f4d4c2ebb3be9797ef6cd7dcbc2124c825f7a.tar.xz | |
ARM: uniphier: add PLL init code for LD11 SoC
- Initialize PLLs (SPL initializes only DPLL to save the precious
SPL memory footprint)
- Adjust CPLL/MPLL to the final tape-out frequency
- Set the Cortex-A53 clock to the maximum frequency since it is
running at 500MHz (SPLL/4) on startup
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'arch/arm/mach-uniphier/clk/pll-ld11.c')
| -rw-r--r-- | arch/arm/mach-uniphier/clk/pll-ld11.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/clk/pll-ld11.c b/arch/arm/mach-uniphier/clk/pll-ld11.c new file mode 100644 index 0000000..8a4a748 --- /dev/null +++ b/arch/arm/mach-uniphier/clk/pll-ld11.c @@ -0,0 +1,32 @@ +/* + * Copyright (C) 2016 Socionext Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <linux/io.h> + +#include "../init.h" +#include "../sc64-regs.h" +#include "pll.h" + +void uniphier_ld11_pll_init(void) +{ + uniphier_ld20_sscpll_init(SC_CPLLCTRL, 1960, 1, 2); /* 2000MHz -> 1960MHz */ + /* do nothing for SPLL */ + uniphier_ld20_sscpll_init(SC_MPLLCTRL, 1600, 1, 2); /* 1500MHz -> 1600MHz */ + uniphier_ld20_sscpll_init(SC_VSPLLCTRL, UNIPHIER_PLL_FREQ_DEFAULT, 0, 2); + + mdelay(1); + + uniphier_ld20_sscpll_ssc_en(SC_CPLLCTRL); + uniphier_ld20_sscpll_ssc_en(SC_MPLLCTRL); + uniphier_ld20_sscpll_ssc_en(SC_VSPLLCTRL); + + uniphier_ld20_vpll27_init(SC_VPLL27FCTRL); + uniphier_ld20_vpll27_init(SC_VPLL27ACTRL); + + writel(0, SC_CA53_GEARSET); /* Gear0: CPLL/2 */ + writel(SC_CA_GEARUPD, SC_CA53_GEARUPD); +} |