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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / f404b66ce118343b77ae58f78cccd6381b329dd1 / . / arch / arm / mach-uniphier / clk / pll-pro4.c
blob: cdd1fd4bf162008449a1e095fb3c7d66b9052e48 [file] [log] [blame]
Masahiro Yamada6a3e4272016-09-17 03:33:09 +0900[diff] [blame]1/*
2 * Copyright (C) 2013-2014 Panasonic Corporation
3 * Copyright (C) 2015-2016 Socionext Inc.
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8#include <common.h>
9#include <linux/io.h>
10
11#include "../init.h"
12#include "../sc-regs.h"
13#include "../sg-regs.h"
14#include "pll.h"
15
16static void vpll_init(void)
17{
18 u32 tmp, clk_mode_axosel;
19
20 /* Set VPLL27A & VPLL27B */
21 tmp = readl(SG_PINMON0);
22 clk_mode_axosel = tmp & SG_PINMON0_CLK_MODE_AXOSEL_MASK;
23
24 /* 25MHz or 6.25MHz is default for Pro4R, no need to set VPLLA/B */
25 if (clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ ||
26 clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_6250KHZ)
27 return;
28
29 /* Disable write protect of VPLL27ACTRL[2-7]*, VPLL27BCTRL[2-8] */
30 tmp = readl(SC_VPLL27ACTRL);
31 tmp |= 0x00000001;
32 writel(tmp, SC_VPLL27ACTRL);
33 tmp = readl(SC_VPLL27BCTRL);
34 tmp |= 0x00000001;
35 writel(tmp, SC_VPLL27BCTRL);
36
37 /* Unset VPLA_K_LD and VPLB_K_LD bit */
38 tmp = readl(SC_VPLL27ACTRL3);
39 tmp &= ~0x10000000;
40 writel(tmp, SC_VPLL27ACTRL3);
41 tmp = readl(SC_VPLL27BCTRL3);
42 tmp &= ~0x10000000;
43 writel(tmp, SC_VPLL27BCTRL3);
44
45 /* Set VPLA_M and VPLB_M to 0x20 */
46 tmp = readl(SC_VPLL27ACTRL2);
47 tmp &= ~0x0000007f;
48 tmp |= 0x00000020;
49 writel(tmp, SC_VPLL27ACTRL2);
50 tmp = readl(SC_VPLL27BCTRL2);
51 tmp &= ~0x0000007f;
52 tmp |= 0x00000020;
53 writel(tmp, SC_VPLL27BCTRL2);
54
55 if (clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_25000KHZ ||
56 clk_mode_axosel == SG_PINMON0_CLK_MODE_AXOSEL_6250KHZ) {
57 /* Set VPLA_K and VPLB_K for AXO: 25MHz */
58 tmp = readl(SC_VPLL27ACTRL3);
59 tmp &= ~0x000fffff;
60 tmp |= 0x00066666;
61 writel(tmp, SC_VPLL27ACTRL3);
62 tmp = readl(SC_VPLL27BCTRL3);
63 tmp &= ~0x000fffff;
64 tmp |= 0x00066666;
65 writel(tmp, SC_VPLL27BCTRL3);
66 } else {
67 /* Set VPLA_K and VPLB_K for AXO: 24.576 MHz */
68 tmp = readl(SC_VPLL27ACTRL3);
69 tmp &= ~0x000fffff;
70 tmp |= 0x000f5800;
71 writel(tmp, SC_VPLL27ACTRL3);
72 tmp = readl(SC_VPLL27BCTRL3);
73 tmp &= ~0x000fffff;
74 tmp |= 0x000f5800;
75 writel(tmp, SC_VPLL27BCTRL3);
76 }
77
78 /* wait 1 usec */
79 udelay(1);
80
81 /* Set VPLA_K_LD and VPLB_K_LD to load K parameters */
82 tmp = readl(SC_VPLL27ACTRL3);
83 tmp |= 0x10000000;
84 writel(tmp, SC_VPLL27ACTRL3);
85 tmp = readl(SC_VPLL27BCTRL3);
86 tmp |= 0x10000000;
87 writel(tmp, SC_VPLL27BCTRL3);
88
89 /* Unset VPLA_SNRST and VPLB_SNRST bit */
90 tmp = readl(SC_VPLL27ACTRL2);
91 tmp |= 0x10000000;
92 writel(tmp, SC_VPLL27ACTRL2);
93 tmp = readl(SC_VPLL27BCTRL2);
94 tmp |= 0x10000000;
95 writel(tmp, SC_VPLL27BCTRL2);
96
97 /* Enable write protect of VPLL27ACTRL[2-7]*, VPLL27BCTRL[2-8] */
98 tmp = readl(SC_VPLL27ACTRL);
99 tmp &= ~0x00000001;
100 writel(tmp, SC_VPLL27ACTRL);
101 tmp = readl(SC_VPLL27BCTRL);
102 tmp &= ~0x00000001;
103 writel(tmp, SC_VPLL27BCTRL);
104}
105
106void uniphier_pro4_pll_init(void)
107{
108 vpll_init();
109 uniphier_ld4_dpll_ssc_en();
110}