Release 4.7 drivers/clk/mvebu/armada-38x.c
/*
* Marvell Armada 380/385 SoC clocks
*
* Copyright (C) 2014 Marvell
*
* Gregory CLEMENT <gregory.clement@free-electrons.com>
* Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
* Andrew Lunn <andrew@lunn.ch>
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/kernel.h>
#include <linux/clk-provider.h>
#include <linux/io.h>
#include <linux/of.h>
#include "common.h"
/*
* SAR[14:10] : Ratios between PCLK0, NBCLK, HCLK and DRAM clocks
*
* SAR[15] : TCLK frequency
* 0 = 250 MHz
* 1 = 200 MHz
*/
#define SAR_A380_TCLK_FREQ_OPT 15
#define SAR_A380_TCLK_FREQ_OPT_MASK 0x1
#define SAR_A380_CPU_DDR_L2_FREQ_OPT 10
#define SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK 0x1F
static const u32 armada_38x_tclk_frequencies[] __initconst = {
250000000,
200000000,
};
static u32 __init armada_38x_get_tclk_freq(void __iomem *sar)
{
u8 tclk_freq_select;
tclk_freq_select = ((readl(sar) >> SAR_A380_TCLK_FREQ_OPT) &
SAR_A380_TCLK_FREQ_OPT_MASK);
return armada_38x_tclk_frequencies[tclk_freq_select];
}
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static const u32 armada_38x_cpu_frequencies[] __initconst = {
0, 0, 0, 0,
1066 * 1000 * 1000, 0, 0, 0,
1332 * 1000 * 1000, 0, 0, 0,
1600 * 1000 * 1000,
};
static u32 __init armada_38x_get_cpu_freq(void __iomem *sar)
{
u8 cpu_freq_select;
cpu_freq_select = ((readl(sar) >> SAR_A380_CPU_DDR_L2_FREQ_OPT) &
SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK);
if (cpu_freq_select >= ARRAY_SIZE(armada_38x_cpu_frequencies)) {
pr_err("Selected CPU frequency (%d) unsupported\n",
cpu_freq_select);
return 0;
}
return armada_38x_cpu_frequencies[cpu_freq_select];
}
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enum { A380_CPU_TO_DDR, A380_CPU_TO_L2 };
static const struct coreclk_ratio armada_38x_coreclk_ratios[] __initconst = {
{ .id = A380_CPU_TO_L2, .name = "l2clk" },
{ .id = A380_CPU_TO_DDR, .name = "ddrclk" },
};
static const int armada_38x_cpu_l2_ratios[32][2] __initconst = {
{0, 1}, {0, 1}, {0, 1}, {0, 1},
{1, 2}, {0, 1}, {0, 1}, {0, 1},
{1, 2}, {0, 1}, {0, 1}, {0, 1},
{1, 2}, {0, 1}, {0, 1}, {0, 1},
{0, 1}, {0, 1}, {0, 1}, {0, 1},
{0, 1}, {0, 1}, {0, 1}, {0, 1},
{0, 1}, {0, 1}, {0, 1}, {0, 1},
{0, 1}, {0, 1}, {0, 1}, {0, 1},
};
static const int armada_38x_cpu_ddr_ratios[32][2] __initconst = {
{0, 1}, {0, 1}, {0, 1}, {0, 1},
{1, 2}, {0, 1}, {0, 1}, {0, 1},
{1, 2}, {0, 1}, {0, 1}, {0, 1},
{1, 2}, {0, 1}, {0, 1}, {0, 1},
{0, 1}, {0, 1}, {0, 1}, {0, 1},
{0, 1}, {0, 1}, {0, 1}, {0, 1},
{0, 1}, {0, 1}, {0, 1}, {0, 1},
{0, 1}, {0, 1}, {0, 1}, {0, 1},
};
static void __init armada_38x_get_clk_ratio(
void __iomem *sar, int id, int *mult, int *div)
{
u32 opt = ((readl(sar) >> SAR_A380_CPU_DDR_L2_FREQ_OPT) &
SAR_A380_CPU_DDR_L2_FREQ_OPT_MASK);
switch (id) {
case A380_CPU_TO_L2:
*mult = armada_38x_cpu_l2_ratios[opt][0];
*div = armada_38x_cpu_l2_ratios[opt][1];
break;
case A380_CPU_TO_DDR:
*mult = armada_38x_cpu_ddr_ratios[opt][0];
*div = armada_38x_cpu_ddr_ratios[opt][1];
break;
}
}
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static const struct coreclk_soc_desc armada_38x_coreclks = {
.get_tclk_freq = armada_38x_get_tclk_freq,
.get_cpu_freq = armada_38x_get_cpu_freq,
.get_clk_ratio = armada_38x_get_clk_ratio,
.ratios = armada_38x_coreclk_ratios,
.num_ratios = ARRAY_SIZE(armada_38x_coreclk_ratios),
};
static void __init armada_38x_coreclk_init(struct device_node *np)
{
mvebu_coreclk_setup(np, &armada_38x_coreclks);
}
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CLK_OF_DECLARE(armada_38x_core_clk, "marvell,armada-380-core-clock",
armada_38x_coreclk_init);
/*
* Clock Gating Control
*/
static const struct clk_gating_soc_desc armada_38x_gating_desc[] __initconst = {
{ "audio", NULL, 0 },
{ "ge2", NULL, 2 },
{ "ge1", NULL, 3 },
{ "ge0", NULL, 4 },
{ "pex1", NULL, 5 },
{ "pex2", NULL, 6 },
{ "pex3", NULL, 7 },
{ "pex0", NULL, 8 },
{ "usb3h0", NULL, 9 },
{ "usb3h1", NULL, 10 },
{ "usb3d", NULL, 11 },
{ "bm", NULL, 13 },
{ "crypto0z", NULL, 14 },
{ "sata0", NULL, 15 },
{ "crypto1z", NULL, 16 },
{ "sdio", NULL, 17 },
{ "usb2", NULL, 18 },
{ "crypto1", NULL, 21 },
{ "xor0", NULL, 22 },
{ "crypto0", NULL, 23 },
{ "tdm", NULL, 25 },
{ "xor1", NULL, 28 },
{ "sata1", NULL, 30 },
{ }
};
static void __init armada_38x_clk_gating_init(struct device_node *np)
{
mvebu_clk_gating_setup(np, armada_38x_gating_desc);
}
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CLK_OF_DECLARE(armada_38x_clk_gating, "marvell,armada-380-gating-clock",
armada_38x_clk_gating_init);
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