| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Copyright (C) 2013-2014 Panasonic Corporation |
| * Copyright (C) 2015-2016 Socionext Inc. |
| */ |
| |
| #include <linux/delay.h> |
| #include <linux/io.h> |
| |
| #include "../init.h" |
| #include "../sc-regs.h" |
| |
| int uniphier_sld8_dpll_init(const struct uniphier_board_data *bd) |
| { |
| u32 tmp; |
| /* |
| * Set DPLL SSC parameters for DPLLCTRL3 |
| * [23] DIVN_TEST 0x1 |
| * [22:16] DIVN 0x50 |
| * [10] FREFSEL_TEST 0x1 |
| * [9:8] FREFSEL 0x2 |
| * [4] ICPD_TEST 0x1 |
| * [3:0] ICPD 0xb |
| */ |
| tmp = readl(SC_DPLLCTRL3); |
| tmp &= ~0x00ff0717; |
| tmp |= 0x00d0061b; |
| writel(tmp, SC_DPLLCTRL3); |
| |
| /* |
| * Set DPLL SSC parameters for DPLLCTRL |
| * <-1%> <-2%> |
| * [29:20] SSC_UPCNT 132 (0x084) 132 (0x084) |
| * [14:0] SSC_dK 6335(0x18bf) 12710(0x31a6) |
| */ |
| tmp = readl(SC_DPLLCTRL); |
| tmp &= ~0x3ff07fff; |
| #ifdef DPLL_SSC_RATE_1PER |
| tmp |= 0x084018bf; |
| #else |
| tmp |= 0x084031a6; |
| #endif |
| writel(tmp, SC_DPLLCTRL); |
| |
| /* |
| * Set DPLL SSC parameters for DPLLCTRL2 |
| * [31:29] SSC_STEP 0 |
| * [27] SSC_REG_REF 1 |
| * [26:20] SSC_M 79 (0x4f) |
| * [19:0] SSC_K 964689 (0xeb851) |
| */ |
| tmp = readl(SC_DPLLCTRL2); |
| tmp &= ~0xefffffff; |
| tmp |= 0x0cfeb851; |
| writel(tmp, SC_DPLLCTRL2); |
| |
| /* Wait 500 usec until dpll gets stable */ |
| udelay(500); |
| |
| return 0; |
| } |
