2 * Marvell Armada 380/385 SoC clocks
4 * Copyright (C) 2014 Marvell
6 * Gregory CLEMENT <gregory.clement@free-electrons.com>
7 * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
8 * Andrew Lunn <andrew@lunn.ch>
10 * This file is licensed under the terms of the GNU General Public
11 * License version 2. This program is licensed "as is" without any
12 * warranty of any kind, whether express or implied.
15 #include <linux/kernel.h>
16 #include <linux/clk-provider.h>
22 * SAR[14:10] : Ratios between PCLK0, NBCLK, HCLK and DRAM clocks
24 * SAR[15] : TCLK frequency
29 #define SAR_A380_TCLK_FREQ_OPT 15
30 #define SAR_A380_TCLK_FREQ_OPT_MASK 0x1
31 #define SAR_A380_CPU_DDR_L2_FREQ_OPT 10
32 #define SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK 0x1F
34 static const u32 armada_38x_tclk_frequencies[] __initconst = {
39 static u32 __init armada_38x_get_tclk_freq(void __iomem *sar)
43 tclk_freq_select = ((readl(sar) >> SAR_A380_TCLK_FREQ_OPT) &
44 SAR_A380_TCLK_FREQ_OPT_MASK);
45 return armada_38x_tclk_frequencies[tclk_freq_select];
48 static const u32 armada_38x_cpu_frequencies[] __initconst = {
50 1066 * 1000 * 1000, 0, 0, 0,
51 1332 * 1000 * 1000, 0, 0, 0,
55 static u32 __init armada_38x_get_cpu_freq(void __iomem *sar)
59 cpu_freq_select = ((readl(sar) >> SAR_A380_CPU_DDR_L2_FREQ_OPT) &
60 SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK);
61 if (cpu_freq_select >= ARRAY_SIZE(armada_38x_cpu_frequencies)) {
62 pr_err("Selected CPU frequency (%d) unsupported\n",
67 return armada_38x_cpu_frequencies[cpu_freq_select];
70 enum { A380_CPU_TO_DDR, A380_CPU_TO_L2 };
72 static const struct coreclk_ratio armada_38x_coreclk_ratios[] __initconst = {
73 { .id = A380_CPU_TO_L2, .name = "l2clk" },
74 { .id = A380_CPU_TO_DDR, .name = "ddrclk" },
77 static const int armada_38x_cpu_l2_ratios[32][2] __initconst = {
78 {0, 1}, {0, 1}, {0, 1}, {0, 1},
79 {1, 2}, {0, 1}, {0, 1}, {0, 1},
80 {1, 2}, {0, 1}, {0, 1}, {0, 1},
81 {1, 2}, {0, 1}, {0, 1}, {0, 1},
82 {0, 1}, {0, 1}, {0, 1}, {0, 1},
83 {0, 1}, {0, 1}, {0, 1}, {0, 1},
84 {0, 1}, {0, 1}, {0, 1}, {0, 1},
85 {0, 1}, {0, 1}, {0, 1}, {0, 1},
88 static const int armada_38x_cpu_ddr_ratios[32][2] __initconst = {
89 {0, 1}, {0, 1}, {0, 1}, {0, 1},
90 {1, 2}, {0, 1}, {0, 1}, {0, 1},
91 {1, 2}, {0, 1}, {0, 1}, {0, 1},
92 {1, 2}, {0, 1}, {0, 1}, {0, 1},
93 {0, 1}, {0, 1}, {0, 1}, {0, 1},
94 {0, 1}, {0, 1}, {0, 1}, {0, 1},
95 {0, 1}, {0, 1}, {0, 1}, {0, 1},
96 {0, 1}, {0, 1}, {0, 1}, {0, 1},
99 static void __init armada_38x_get_clk_ratio(
100 void __iomem *sar, int id, int *mult, int *div)
102 u32 opt = ((readl(sar) >> SAR_A380_CPU_DDR_L2_FREQ_OPT) &
103 SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK);
107 *mult = armada_38x_cpu_l2_ratios[opt][0];
108 *div = armada_38x_cpu_l2_ratios[opt][1];
110 case A380_CPU_TO_DDR:
111 *mult = armada_38x_cpu_ddr_ratios[opt][0];
112 *div = armada_38x_cpu_ddr_ratios[opt][1];
117 static const struct coreclk_soc_desc armada_38x_coreclks = {
118 .get_tclk_freq = armada_38x_get_tclk_freq,
119 .get_cpu_freq = armada_38x_get_cpu_freq,
120 .get_clk_ratio = armada_38x_get_clk_ratio,
121 .ratios = armada_38x_coreclk_ratios,
122 .num_ratios = ARRAY_SIZE(armada_38x_coreclk_ratios),
125 static void __init armada_38x_coreclk_init(struct device_node *np)
127 mvebu_coreclk_setup(np, &armada_38x_coreclks);
129 CLK_OF_DECLARE(armada_38x_core_clk, "marvell,armada-380-core-clock",
130 armada_38x_coreclk_init);
133 * Clock Gating Control
135 static const struct clk_gating_soc_desc armada_38x_gating_desc[] __initconst = {
136 { "audio", NULL, 0 },
144 { "usb3h0", NULL, 9 },
145 { "usb3h1", NULL, 10 },
146 { "usb3d", NULL, 11 },
148 { "crypto0z", NULL, 14 },
149 { "sata0", NULL, 15 },
150 { "crypto1z", NULL, 16 },
151 { "sdio", NULL, 17 },
152 { "usb2", NULL, 18 },
153 { "crypto1", NULL, 21 },
154 { "xor0", NULL, 22 },
155 { "crypto0", NULL, 23 },
157 { "xor1", NULL, 28 },
158 { "sata1", NULL, 30 },
162 static void __init armada_38x_clk_gating_init(struct device_node *np)
164 mvebu_clk_gating_setup(np, armada_38x_gating_desc);
166 CLK_OF_DECLARE(armada_38x_clk_gating, "marvell,armada-380-gating-clock",
167 armada_38x_clk_gating_init);