diff options
Diffstat (limited to 'arch/arm/mach-uniphier/pll/pll-init-pro4.c')
| -rw-r--r-- | arch/arm/mach-uniphier/pll/pll-init-pro4.c | 116 |
1 files changed, 6 insertions, 110 deletions
diff --git a/arch/arm/mach-uniphier/pll/pll-init-pro4.c b/arch/arm/mach-uniphier/pll/pll-init-pro4.c index a7e4e0e..3ac48d6 100644 --- a/arch/arm/mach-uniphier/pll/pll-init-pro4.c +++ b/arch/arm/mach-uniphier/pll/pll-init-pro4.c @@ -1,5 +1,6 @@ /* - * Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com> + * Copyright (C) 2013-2014 Panasonic Corporation + * Copyright (C) 2015-2016 Socionext Inc. * * SPDX-License-Identifier: GPL-2.0+ */ @@ -10,12 +11,12 @@ #include "../init.h" #include "../sc-regs.h" -#include "../sg-regs.h" #undef DPLL_SSC_RATE_1PER -static int dpll_init(unsigned int dram_freq) +int uniphier_pro4_dpll_init(const struct uniphier_board_data *bd) { + unsigned int dram_freq = bd->dram_freq; u32 tmp; /* @@ -52,113 +53,8 @@ static int dpll_init(unsigned int dram_freq) tmp |= SC_DPLLCTRL2_NRSTDS; writel(tmp, SC_DPLLCTRL2); - return 0; -} - -static void vpll_init(void) -{ - u32 tmp, clk_mode_axosel; - - /* Set VPLL27A & VPLL27B */ - tmp = readl(SG_PINMON0); - clk_mode_axosel = tmp & SG_PINMON0_CLK_MODE_AXOSEL_MASK; - - /* 25MHz or 6.25MHz is default for Pro4R, no need to set VPLLA/B */ - if (clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ || - clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_6250KHZ) - return; - - /* Disable write protect of VPLL27ACTRL[2-7]*, VPLL27BCTRL[2-8] */ - tmp = readl(SC_VPLL27ACTRL); - tmp |= 0x00000001; - writel(tmp, SC_VPLL27ACTRL); - tmp = readl(SC_VPLL27BCTRL); - tmp |= 0x00000001; - writel(tmp, SC_VPLL27BCTRL); - - /* Unset VPLA_K_LD and VPLB_K_LD bit */ - tmp = readl(SC_VPLL27ACTRL3); - tmp &= ~0x10000000; - writel(tmp, SC_VPLL27ACTRL3); - tmp = readl(SC_VPLL27BCTRL3); - tmp &= ~0x10000000; - writel(tmp, SC_VPLL27BCTRL3); - - /* Set VPLA_M and VPLB_M to 0x20 */ - tmp = readl(SC_VPLL27ACTRL2); - tmp &= ~0x0000007f; - tmp |= 0x00000020; - writel(tmp, SC_VPLL27ACTRL2); - tmp = readl(SC_VPLL27BCTRL2); - tmp &= ~0x0000007f; - tmp |= 0x00000020; - writel(tmp, SC_VPLL27BCTRL2); - - if (clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ || - clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_6250KHZ) { - /* Set VPLA_K and VPLB_K for AXO: 25MHz */ - tmp = readl(SC_VPLL27ACTRL3); - tmp &= ~0x000fffff; - tmp |= 0x00066666; - writel(tmp, SC_VPLL27ACTRL3); - tmp = readl(SC_VPLL27BCTRL3); - tmp &= ~0x000fffff; - tmp |= 0x00066666; - writel(tmp, SC_VPLL27BCTRL3); - } else { - /* Set VPLA_K and VPLB_K for AXO: 24.576 MHz */ - tmp = readl(SC_VPLL27ACTRL3); - tmp &= ~0x000fffff; - tmp |= 0x000f5800; - writel(tmp, SC_VPLL27ACTRL3); - tmp = readl(SC_VPLL27BCTRL3); - tmp &= ~0x000fffff; - tmp |= 0x000f5800; - writel(tmp, SC_VPLL27BCTRL3); - } - - /* wait 1 usec */ - udelay(1); - - /* Set VPLA_K_LD and VPLB_K_LD to load K parameters */ - tmp = readl(SC_VPLL27ACTRL3); - tmp |= 0x10000000; - writel(tmp, SC_VPLL27ACTRL3); - tmp = readl(SC_VPLL27BCTRL3); - tmp |= 0x10000000; - writel(tmp, SC_VPLL27BCTRL3); - - /* Unset VPLA_SNRST and VPLB_SNRST bit */ - tmp = readl(SC_VPLL27ACTRL2); - tmp |= 0x10000000; - writel(tmp, SC_VPLL27ACTRL2); - tmp = readl(SC_VPLL27BCTRL2); - tmp |= 0x10000000; - writel(tmp, SC_VPLL27BCTRL2); - - /* Enable write protect of VPLL27ACTRL[2-7]*, VPLL27BCTRL[2-8] */ - tmp = readl(SC_VPLL27ACTRL); - tmp &= ~0x00000001; - writel(tmp, SC_VPLL27ACTRL); - tmp = readl(SC_VPLL27BCTRL); - tmp &= ~0x00000001; - writel(tmp, SC_VPLL27BCTRL); -} - -int uniphier_pro4_pll_init(const struct uniphier_board_data *bd) -{ - int ret; - - ret = dpll_init(bd->dram_freq); - if (ret) - return ret; - vpll_init(); - - /* - * Wait 500 usec until dpll get stable - * We wait 1 usec in vpll_init() so 1 usec can be saved here. - */ - udelay(499); + /* Wait until dpll gets stable */ + udelay(500); return 0; } |