168 lines
4.4 KiB
C
168 lines
4.4 KiB
C
/*
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* Marvell Armada 380/385 SoC clocks
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*
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* Copyright (C) 2014 Marvell
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*
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* Gregory CLEMENT <gregory.clement@free-electrons.com>
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* Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
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* Andrew Lunn <andrew@lunn.ch>
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <linux/kernel.h>
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#include <linux/clk-provider.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include "common.h"
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/*
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* SAR[14:10] : Ratios between PCLK0, NBCLK, HCLK and DRAM clocks
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*
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* SAR[15] : TCLK frequency
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* 0 = 250 MHz
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* 1 = 200 MHz
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*/
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#define SAR_A380_TCLK_FREQ_OPT 15
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#define SAR_A380_TCLK_FREQ_OPT_MASK 0x1
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#define SAR_A380_CPU_DDR_L2_FREQ_OPT 10
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#define SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK 0x1F
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static const u32 armada_38x_tclk_frequencies[] __initconst = {
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250000000,
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200000000,
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};
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static u32 __init armada_38x_get_tclk_freq(void __iomem *sar)
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{
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u8 tclk_freq_select;
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tclk_freq_select = ((readl(sar) >> SAR_A380_TCLK_FREQ_OPT) &
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SAR_A380_TCLK_FREQ_OPT_MASK);
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return armada_38x_tclk_frequencies[tclk_freq_select];
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}
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static const u32 armada_38x_cpu_frequencies[] __initconst = {
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0, 0, 0, 0,
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1066 * 1000 * 1000, 0, 0, 0,
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1332 * 1000 * 1000, 0, 0, 0,
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1600 * 1000 * 1000,
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};
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static u32 __init armada_38x_get_cpu_freq(void __iomem *sar)
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{
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u8 cpu_freq_select;
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cpu_freq_select = ((readl(sar) >> SAR_A380_CPU_DDR_L2_FREQ_OPT) &
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SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK);
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if (cpu_freq_select >= ARRAY_SIZE(armada_38x_cpu_frequencies)) {
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pr_err("Selected CPU frequency (%d) unsupported\n",
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cpu_freq_select);
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return 0;
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}
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return armada_38x_cpu_frequencies[cpu_freq_select];
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}
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enum { A380_CPU_TO_DDR, A380_CPU_TO_L2 };
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static const struct coreclk_ratio armada_38x_coreclk_ratios[] __initconst = {
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{ .id = A380_CPU_TO_L2, .name = "l2clk" },
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{ .id = A380_CPU_TO_DDR, .name = "ddrclk" },
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};
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static const int armada_38x_cpu_l2_ratios[32][2] __initconst = {
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{0, 1}, {0, 1}, {0, 1}, {0, 1},
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{1, 2}, {0, 1}, {0, 1}, {0, 1},
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{1, 2}, {0, 1}, {0, 1}, {0, 1},
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{1, 2}, {0, 1}, {0, 1}, {0, 1},
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{0, 1}, {0, 1}, {0, 1}, {0, 1},
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{0, 1}, {0, 1}, {0, 1}, {0, 1},
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{0, 1}, {0, 1}, {0, 1}, {0, 1},
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{0, 1}, {0, 1}, {0, 1}, {0, 1},
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};
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static const int armada_38x_cpu_ddr_ratios[32][2] __initconst = {
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{0, 1}, {0, 1}, {0, 1}, {0, 1},
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{1, 2}, {0, 1}, {0, 1}, {0, 1},
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{1, 2}, {0, 1}, {0, 1}, {0, 1},
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{1, 2}, {0, 1}, {0, 1}, {0, 1},
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{0, 1}, {0, 1}, {0, 1}, {0, 1},
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{0, 1}, {0, 1}, {0, 1}, {0, 1},
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{0, 1}, {0, 1}, {0, 1}, {0, 1},
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{0, 1}, {0, 1}, {0, 1}, {0, 1},
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};
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static void __init armada_38x_get_clk_ratio(
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void __iomem *sar, int id, int *mult, int *div)
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{
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u32 opt = ((readl(sar) >> SAR_A380_CPU_DDR_L2_FREQ_OPT) &
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SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK);
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switch (id) {
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case A380_CPU_TO_L2:
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*mult = armada_38x_cpu_l2_ratios[opt][0];
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*div = armada_38x_cpu_l2_ratios[opt][1];
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break;
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case A380_CPU_TO_DDR:
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*mult = armada_38x_cpu_ddr_ratios[opt][0];
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*div = armada_38x_cpu_ddr_ratios[opt][1];
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break;
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}
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}
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static const struct coreclk_soc_desc armada_38x_coreclks = {
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.get_tclk_freq = armada_38x_get_tclk_freq,
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.get_cpu_freq = armada_38x_get_cpu_freq,
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.get_clk_ratio = armada_38x_get_clk_ratio,
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.ratios = armada_38x_coreclk_ratios,
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.num_ratios = ARRAY_SIZE(armada_38x_coreclk_ratios),
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};
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static void __init armada_38x_coreclk_init(struct device_node *np)
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{
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mvebu_coreclk_setup(np, &armada_38x_coreclks);
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}
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CLK_OF_DECLARE(armada_38x_core_clk, "marvell,armada-380-core-clock",
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armada_38x_coreclk_init);
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/*
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* Clock Gating Control
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*/
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static const struct clk_gating_soc_desc armada_38x_gating_desc[] __initconst = {
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{ "audio", NULL, 0 },
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{ "ge2", NULL, 2 },
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{ "ge1", NULL, 3 },
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{ "ge0", NULL, 4 },
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{ "pex1", NULL, 5 },
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{ "pex2", NULL, 6 },
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{ "pex3", NULL, 7 },
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{ "pex0", NULL, 8 },
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{ "usb3h0", NULL, 9 },
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{ "usb3h1", NULL, 10 },
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{ "usb3d", NULL, 11 },
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{ "bm", NULL, 13 },
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{ "crypto0z", NULL, 14 },
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{ "sata0", NULL, 15 },
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{ "crypto1z", NULL, 16 },
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{ "sdio", NULL, 17 },
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{ "usb2", NULL, 18 },
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{ "crypto1", NULL, 21 },
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{ "xor0", NULL, 22 },
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{ "crypto0", NULL, 23 },
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{ "tdm", NULL, 25 },
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{ "xor1", NULL, 28 },
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{ "sata1", NULL, 30 },
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{ }
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};
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static void __init armada_38x_clk_gating_init(struct device_node *np)
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{
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mvebu_clk_gating_setup(np, armada_38x_gating_desc);
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}
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CLK_OF_DECLARE(armada_38x_clk_gating, "marvell,armada-380-gating-clock",
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armada_38x_clk_gating_init);
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