mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 06:55:13 +08:00
c3828949a2
Convert the remaining files to SPDX license description. Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
157 lines
3.9 KiB
C
157 lines
3.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Marvell Armada 39x SoC clocks
|
|
*
|
|
* Copyright (C) 2015 Marvell
|
|
*
|
|
* Gregory CLEMENT <gregory.clement@free-electrons.com>
|
|
* Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
|
|
* Andrew Lunn <andrew@lunn.ch>
|
|
* Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
|
|
*
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
#include "common.h"
|
|
|
|
/*
|
|
* SARL[14:10] : Ratios between CPU, NBCLK, HCLK and DCLK.
|
|
*
|
|
* SARL[15] : TCLK frequency
|
|
* 0 = 250 MHz
|
|
* 1 = 200 MHz
|
|
*
|
|
* SARH[0] : Reference clock frequency
|
|
* 0 = 25 Mhz
|
|
* 1 = 40 Mhz
|
|
*/
|
|
|
|
#define SARL 0
|
|
#define SARL_A390_TCLK_FREQ_OPT 15
|
|
#define SARL_A390_TCLK_FREQ_OPT_MASK 0x1
|
|
#define SARL_A390_CPU_DDR_L2_FREQ_OPT 10
|
|
#define SARL_A390_CPU_DDR_L2_FREQ_OPT_MASK 0x1F
|
|
#define SARH 4
|
|
#define SARH_A390_REFCLK_FREQ BIT(0)
|
|
|
|
static const u32 armada_39x_tclk_frequencies[] __initconst = {
|
|
250000000,
|
|
200000000,
|
|
};
|
|
|
|
static u32 __init armada_39x_get_tclk_freq(void __iomem *sar)
|
|
{
|
|
u8 tclk_freq_select;
|
|
|
|
tclk_freq_select = ((readl(sar + SARL) >> SARL_A390_TCLK_FREQ_OPT) &
|
|
SARL_A390_TCLK_FREQ_OPT_MASK);
|
|
return armada_39x_tclk_frequencies[tclk_freq_select];
|
|
}
|
|
|
|
static const u32 armada_39x_cpu_frequencies[] __initconst = {
|
|
[0x0] = 666 * 1000 * 1000,
|
|
[0x2] = 800 * 1000 * 1000,
|
|
[0x3] = 800 * 1000 * 1000,
|
|
[0x4] = 1066 * 1000 * 1000,
|
|
[0x5] = 1066 * 1000 * 1000,
|
|
[0x6] = 1200 * 1000 * 1000,
|
|
[0x8] = 1332 * 1000 * 1000,
|
|
[0xB] = 1600 * 1000 * 1000,
|
|
[0xC] = 1600 * 1000 * 1000,
|
|
[0x12] = 1800 * 1000 * 1000,
|
|
[0x1E] = 1800 * 1000 * 1000,
|
|
};
|
|
|
|
static u32 __init armada_39x_get_cpu_freq(void __iomem *sar)
|
|
{
|
|
u8 cpu_freq_select;
|
|
|
|
cpu_freq_select = ((readl(sar + SARL) >> SARL_A390_CPU_DDR_L2_FREQ_OPT) &
|
|
SARL_A390_CPU_DDR_L2_FREQ_OPT_MASK);
|
|
if (cpu_freq_select >= ARRAY_SIZE(armada_39x_cpu_frequencies)) {
|
|
pr_err("Selected CPU frequency (%d) unsupported\n",
|
|
cpu_freq_select);
|
|
return 0;
|
|
}
|
|
|
|
return armada_39x_cpu_frequencies[cpu_freq_select];
|
|
}
|
|
|
|
enum { A390_CPU_TO_NBCLK, A390_CPU_TO_HCLK, A390_CPU_TO_DCLK };
|
|
|
|
static const struct coreclk_ratio armada_39x_coreclk_ratios[] __initconst = {
|
|
{ .id = A390_CPU_TO_NBCLK, .name = "nbclk" },
|
|
{ .id = A390_CPU_TO_HCLK, .name = "hclk" },
|
|
{ .id = A390_CPU_TO_DCLK, .name = "dclk" },
|
|
};
|
|
|
|
static void __init armada_39x_get_clk_ratio(
|
|
void __iomem *sar, int id, int *mult, int *div)
|
|
{
|
|
switch (id) {
|
|
case A390_CPU_TO_NBCLK:
|
|
*mult = 1;
|
|
*div = 2;
|
|
break;
|
|
case A390_CPU_TO_HCLK:
|
|
*mult = 1;
|
|
*div = 4;
|
|
break;
|
|
case A390_CPU_TO_DCLK:
|
|
*mult = 1;
|
|
*div = 2;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static u32 __init armada_39x_refclk_ratio(void __iomem *sar)
|
|
{
|
|
if (readl(sar + SARH) & SARH_A390_REFCLK_FREQ)
|
|
return 40 * 1000 * 1000;
|
|
else
|
|
return 25 * 1000 * 1000;
|
|
}
|
|
|
|
static const struct coreclk_soc_desc armada_39x_coreclks = {
|
|
.get_tclk_freq = armada_39x_get_tclk_freq,
|
|
.get_cpu_freq = armada_39x_get_cpu_freq,
|
|
.get_clk_ratio = armada_39x_get_clk_ratio,
|
|
.get_refclk_freq = armada_39x_refclk_ratio,
|
|
.ratios = armada_39x_coreclk_ratios,
|
|
.num_ratios = ARRAY_SIZE(armada_39x_coreclk_ratios),
|
|
};
|
|
|
|
static void __init armada_39x_coreclk_init(struct device_node *np)
|
|
{
|
|
mvebu_coreclk_setup(np, &armada_39x_coreclks);
|
|
}
|
|
CLK_OF_DECLARE(armada_39x_core_clk, "marvell,armada-390-core-clock",
|
|
armada_39x_coreclk_init);
|
|
|
|
/*
|
|
* Clock Gating Control
|
|
*/
|
|
static const struct clk_gating_soc_desc armada_39x_gating_desc[] __initconst = {
|
|
{ "pex1", NULL, 5 },
|
|
{ "pex2", NULL, 6 },
|
|
{ "pex3", NULL, 7 },
|
|
{ "pex0", NULL, 8 },
|
|
{ "usb3h0", NULL, 9 },
|
|
{ "usb3h1", NULL, 10 },
|
|
{ "sata0", NULL, 15 },
|
|
{ "sdio", NULL, 17 },
|
|
{ "xor0", NULL, 22 },
|
|
{ "xor1", NULL, 28 },
|
|
{ }
|
|
};
|
|
|
|
static void __init armada_39x_clk_gating_init(struct device_node *np)
|
|
{
|
|
mvebu_clk_gating_setup(np, armada_39x_gating_desc);
|
|
}
|
|
CLK_OF_DECLARE(armada_39x_clk_gating, "marvell,armada-390-gating-clock",
|
|
armada_39x_clk_gating_init);
|