orion.c
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/*
* Marvell Orion SoC clocks
*
* Copyright (C) 2014 Thomas Petazzoni
*
* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
*
* 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"
static const struct coreclk_ratio orion_coreclk_ratios[] __initconst = {
{ .id = 0, .name = "ddrclk", }
};
/*
* Orion 5182
*/
#define SAR_MV88F5182_TCLK_FREQ 8
#define SAR_MV88F5182_TCLK_FREQ_MASK 0x3
static u32 __init mv88f5182_get_tclk_freq(void __iomem *sar)
{
u32 opt = (readl(sar) >> SAR_MV88F5182_TCLK_FREQ) &
SAR_MV88F5182_TCLK_FREQ_MASK;
if (opt == 1)
return 150000000;
else if (opt == 2)
return 166666667;
else
return 0;
}
#define SAR_MV88F5182_CPU_FREQ 4
#define SAR_MV88F5182_CPU_FREQ_MASK 0xf
static u32 __init mv88f5182_get_cpu_freq(void __iomem *sar)
{
u32 opt = (readl(sar) >> SAR_MV88F5182_CPU_FREQ) &
SAR_MV88F5182_CPU_FREQ_MASK;
if (opt == 0)
return 333333333;
else if (opt == 1 || opt == 2)
return 400000000;
else if (opt == 3)
return 500000000;
else
return 0;
}
static void __init mv88f5182_get_clk_ratio(void __iomem *sar, int id,
int *mult, int *div)
{
u32 opt = (readl(sar) >> SAR_MV88F5182_CPU_FREQ) &
SAR_MV88F5182_CPU_FREQ_MASK;
if (opt == 0 || opt == 1) {
*mult = 1;
*div = 2;
} else if (opt == 2 || opt == 3) {
*mult = 1;
*div = 3;
} else {
*mult = 0;
*div = 1;
}
}
static const struct coreclk_soc_desc mv88f5182_coreclks = {
.get_tclk_freq = mv88f5182_get_tclk_freq,
.get_cpu_freq = mv88f5182_get_cpu_freq,
.get_clk_ratio = mv88f5182_get_clk_ratio,
.ratios = orion_coreclk_ratios,
.num_ratios = ARRAY_SIZE(orion_coreclk_ratios),
};
static void __init mv88f5182_clk_init(struct device_node *np)
{
return mvebu_coreclk_setup(np, &mv88f5182_coreclks);
}
CLK_OF_DECLARE(mv88f5182_clk, "marvell,mv88f5182-core-clock", mv88f5182_clk_init);
/*
* Orion 5281
*/
static u32 __init mv88f5281_get_tclk_freq(void __iomem *sar)
{
/* On 5281, tclk is always 166 Mhz */
return 166666667;
}
#define SAR_MV88F5281_CPU_FREQ 4
#define SAR_MV88F5281_CPU_FREQ_MASK 0xf
static u32 __init mv88f5281_get_cpu_freq(void __iomem *sar)
{
u32 opt = (readl(sar) >> SAR_MV88F5281_CPU_FREQ) &
SAR_MV88F5281_CPU_FREQ_MASK;
if (opt == 1 || opt == 2)
return 400000000;
else if (opt == 3)
return 500000000;
else
return 0;
}
static void __init mv88f5281_get_clk_ratio(void __iomem *sar, int id,
int *mult, int *div)
{
u32 opt = (readl(sar) >> SAR_MV88F5281_CPU_FREQ) &
SAR_MV88F5281_CPU_FREQ_MASK;
if (opt == 1) {
*mult = 1;
*div = 2;
} else if (opt == 2 || opt == 3) {
*mult = 1;
*div = 3;
} else {
*mult = 0;
*div = 1;
}
}
static const struct coreclk_soc_desc mv88f5281_coreclks = {
.get_tclk_freq = mv88f5281_get_tclk_freq,
.get_cpu_freq = mv88f5281_get_cpu_freq,
.get_clk_ratio = mv88f5281_get_clk_ratio,
.ratios = orion_coreclk_ratios,
.num_ratios = ARRAY_SIZE(orion_coreclk_ratios),
};
static void __init mv88f5281_clk_init(struct device_node *np)
{
return mvebu_coreclk_setup(np, &mv88f5281_coreclks);
}
CLK_OF_DECLARE(mv88f5281_clk, "marvell,mv88f5281-core-clock", mv88f5281_clk_init);
/*
* Orion 6183
*/
#define SAR_MV88F6183_TCLK_FREQ 9
#define SAR_MV88F6183_TCLK_FREQ_MASK 0x1
static u32 __init mv88f6183_get_tclk_freq(void __iomem *sar)
{
u32 opt = (readl(sar) >> SAR_MV88F6183_TCLK_FREQ) &
SAR_MV88F6183_TCLK_FREQ_MASK;
if (opt == 0)
return 133333333;
else if (opt == 1)
return 166666667;
else
return 0;
}
#define SAR_MV88F6183_CPU_FREQ 1
#define SAR_MV88F6183_CPU_FREQ_MASK 0x3f
static u32 __init mv88f6183_get_cpu_freq(void __iomem *sar)
{
u32 opt = (readl(sar) >> SAR_MV88F6183_CPU_FREQ) &
SAR_MV88F6183_CPU_FREQ_MASK;
if (opt == 9)
return 333333333;
else if (opt == 17)
return 400000000;
else
return 0;
}
static void __init mv88f6183_get_clk_ratio(void __iomem *sar, int id,
int *mult, int *div)
{
u32 opt = (readl(sar) >> SAR_MV88F6183_CPU_FREQ) &
SAR_MV88F6183_CPU_FREQ_MASK;
if (opt == 9 || opt == 17) {
*mult = 1;
*div = 2;
} else {
*mult = 0;
*div = 1;
}
}
static const struct coreclk_soc_desc mv88f6183_coreclks = {
.get_tclk_freq = mv88f6183_get_tclk_freq,
.get_cpu_freq = mv88f6183_get_cpu_freq,
.get_clk_ratio = mv88f6183_get_clk_ratio,
.ratios = orion_coreclk_ratios,
.num_ratios = ARRAY_SIZE(orion_coreclk_ratios),
};
static void __init mv88f6183_clk_init(struct device_node *np)
{
return mvebu_coreclk_setup(np, &mv88f6183_coreclks);
}
CLK_OF_DECLARE(mv88f6183_clk, "marvell,mv88f6183-core-clock", mv88f6183_clk_init);