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1// SPDX-License-Identifier: GPL-2.02/*3 * Marvell Armada 380/385 SoC clocks4 *5 * Copyright (C) 2014 Marvell6 *7 * Gregory CLEMENT <gregory.clement@free-electrons.com>8 * Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>9 * Andrew Lunn <andrew@lunn.ch>10 *11 */12 13#include <linux/kernel.h>14#include <linux/clk-provider.h>15#include <linux/io.h>16#include <linux/of.h>17#include "common.h"18 19/*20 * SAR[14:10] : Ratios between PCLK0, NBCLK, HCLK and DRAM clocks21 *22 * SAR[15]    : TCLK frequency23 *		 0 = 250 MHz24 *		 1 = 200 MHz25 */26 27#define SAR_A380_TCLK_FREQ_OPT		  1528#define SAR_A380_TCLK_FREQ_OPT_MASK	  0x129#define SAR_A380_CPU_DDR_L2_FREQ_OPT	  1030#define SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK 0x1F31 32static const u32 armada_38x_tclk_frequencies[] __initconst = {33	250000000,34	200000000,35};36 37static u32 __init armada_38x_get_tclk_freq(void __iomem *sar)38{39	u8 tclk_freq_select;40 41	tclk_freq_select = ((readl(sar) >> SAR_A380_TCLK_FREQ_OPT) &42			    SAR_A380_TCLK_FREQ_OPT_MASK);43	return armada_38x_tclk_frequencies[tclk_freq_select];44}45 46static const u32 armada_38x_cpu_frequencies[] __initconst = {47	666 * 1000 * 1000,  0, 800 * 1000 * 1000, 0,48	1066 * 1000 * 1000, 0, 1200 * 1000 * 1000, 0,49	1332 * 1000 * 1000, 0, 0, 0,50	1600 * 1000 * 1000, 0, 0, 0,51	1866 * 1000 * 1000, 0, 0, 2000 * 1000 * 1000,52};53 54static u32 __init armada_38x_get_cpu_freq(void __iomem *sar)55{56	u8 cpu_freq_select;57 58	cpu_freq_select = ((readl(sar) >> SAR_A380_CPU_DDR_L2_FREQ_OPT) &59			   SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK);60	if (cpu_freq_select >= ARRAY_SIZE(armada_38x_cpu_frequencies)) {61		pr_err("Selected CPU frequency (%d) unsupported\n",62			cpu_freq_select);63		return 0;64	}65 66	return armada_38x_cpu_frequencies[cpu_freq_select];67}68 69enum { A380_CPU_TO_DDR, A380_CPU_TO_L2 };70 71static const struct coreclk_ratio armada_38x_coreclk_ratios[] __initconst = {72	{ .id = A380_CPU_TO_L2,	 .name = "l2clk" },73	{ .id = A380_CPU_TO_DDR, .name = "ddrclk" },74};75 76static const int armada_38x_cpu_l2_ratios[32][2] __initconst = {77	{1, 2}, {0, 1}, {1, 2}, {0, 1},78	{1, 2}, {0, 1}, {1, 2}, {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}, {1, 2},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};86 87static const int armada_38x_cpu_ddr_ratios[32][2] __initconst = {88	{0, 1}, {0, 1}, {0, 1}, {0, 1},89	{1, 2}, {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}, {7, 15},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};97 98static void __init armada_38x_get_clk_ratio(99	void __iomem *sar, int id, int *mult, int *div)100{101	u32 opt = ((readl(sar) >> SAR_A380_CPU_DDR_L2_FREQ_OPT) &102		SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK);103 104	switch (id) {105	case A380_CPU_TO_L2:106		*mult = armada_38x_cpu_l2_ratios[opt][0];107		*div = armada_38x_cpu_l2_ratios[opt][1];108		break;109	case A380_CPU_TO_DDR:110		*mult = armada_38x_cpu_ddr_ratios[opt][0];111		*div = armada_38x_cpu_ddr_ratios[opt][1];112		break;113	}114}115 116static const struct coreclk_soc_desc armada_38x_coreclks = {117	.get_tclk_freq = armada_38x_get_tclk_freq,118	.get_cpu_freq = armada_38x_get_cpu_freq,119	.get_clk_ratio = armada_38x_get_clk_ratio,120	.ratios = armada_38x_coreclk_ratios,121	.num_ratios = ARRAY_SIZE(armada_38x_coreclk_ratios),122};123 124static void __init armada_38x_coreclk_init(struct device_node *np)125{126	mvebu_coreclk_setup(np, &armada_38x_coreclks);127}128CLK_OF_DECLARE(armada_38x_core_clk, "marvell,armada-380-core-clock",129	       armada_38x_coreclk_init);130 131/*132 * Clock Gating Control133 */134static const struct clk_gating_soc_desc armada_38x_gating_desc[] __initconst = {135	{ "audio", NULL, 0 },136	{ "ge2", NULL, 2 },137	{ "ge1", NULL, 3 },138	{ "ge0", NULL, 4 },139	{ "pex1", NULL, 5 },140	{ "pex2", NULL, 6 },141	{ "pex3", NULL, 7 },142	{ "pex0", NULL, 8 },143	{ "usb3h0", NULL, 9 },144	{ "usb3h1", NULL, 10 },145	{ "usb3d", NULL, 11 },146	{ "bm", NULL, 13 },147	{ "crypto0z", NULL, 14 },148	{ "sata0", NULL, 15 },149	{ "crypto1z", NULL, 16 },150	{ "sdio", NULL, 17 },151	{ "usb2", NULL, 18 },152	{ "crypto1", NULL, 21 },153	{ "xor0", NULL, 22 },154	{ "crypto0", NULL, 23 },155	{ "tdm", NULL, 25 },156	{ "xor1", NULL, 28 },157	{ "sata1", NULL, 30 },158	{ }159};160 161static void __init armada_38x_clk_gating_init(struct device_node *np)162{163	mvebu_clk_gating_setup(np, armada_38x_gating_desc);164}165CLK_OF_DECLARE(armada_38x_clk_gating, "marvell,armada-380-gating-clock",166	       armada_38x_clk_gating_init);167