mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 01:04:19 +08:00
3a64789568
There is no need to use clkdev inside the clock driver to retrieve the clocks for internal use. Instead __clk_lookup() helper can be used to look up clocks by their platform name. This patch modifies the behavior of _get_rate() helper to look up clocks by platform name and adjusts all users of it to pass platform names instead of clkdev aliases. Signed-off-by: Tomasz Figa <t.figa@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
139 lines
4.9 KiB
C
139 lines
4.9 KiB
C
/*
|
|
* Copyright (c) 2013 Samsung Electronics Co., Ltd.
|
|
* Author: Thomas Abraham <thomas.ab@samsung.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Common Clock Framework support for Exynos5440 SoC.
|
|
*/
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/clkdev.h>
|
|
#include <linux/clk-provider.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
|
|
#include "clk.h"
|
|
#include "clk-pll.h"
|
|
|
|
#define CLKEN_OV_VAL 0xf8
|
|
#define CPU_CLK_STATUS 0xfc
|
|
#define MISC_DOUT1 0x558
|
|
|
|
/*
|
|
* Let each supported clock get a unique id. This id is used to lookup the clock
|
|
* for device tree based platforms.
|
|
*/
|
|
enum exynos5440_clks {
|
|
none, xtal, arm_clk,
|
|
|
|
spi_baud = 16, pb0_250, pr0_250, pr1_250, b_250, b_125, b_200, sata,
|
|
usb, gmac0, cs250, pb0_250_o, pr0_250_o, pr1_250_o, b_250_o, b_125_o,
|
|
b_200_o, sata_o, usb_o, gmac0_o, cs250_o,
|
|
|
|
nr_clks,
|
|
};
|
|
|
|
/* parent clock name list */
|
|
PNAME(mout_armclk_p) = { "cplla", "cpllb" };
|
|
PNAME(mout_spi_p) = { "div125", "div200" };
|
|
|
|
/* fixed rate clocks generated outside the soc */
|
|
static struct samsung_fixed_rate_clock exynos5440_fixed_rate_ext_clks[] __initdata = {
|
|
FRATE(none, "xtal", NULL, CLK_IS_ROOT, 0),
|
|
};
|
|
|
|
/* fixed rate clocks */
|
|
static struct samsung_fixed_rate_clock exynos5440_fixed_rate_clks[] __initdata = {
|
|
FRATE(none, "ppll", NULL, CLK_IS_ROOT, 1000000000),
|
|
FRATE(none, "usb_phy0", NULL, CLK_IS_ROOT, 60000000),
|
|
FRATE(none, "usb_phy1", NULL, CLK_IS_ROOT, 60000000),
|
|
FRATE(none, "usb_ohci12", NULL, CLK_IS_ROOT, 12000000),
|
|
FRATE(none, "usb_ohci48", NULL, CLK_IS_ROOT, 48000000),
|
|
};
|
|
|
|
/* fixed factor clocks */
|
|
static struct samsung_fixed_factor_clock exynos5440_fixed_factor_clks[] __initdata = {
|
|
FFACTOR(none, "div250", "ppll", 1, 4, 0),
|
|
FFACTOR(none, "div200", "ppll", 1, 5, 0),
|
|
FFACTOR(none, "div125", "div250", 1, 2, 0),
|
|
};
|
|
|
|
/* mux clocks */
|
|
static struct samsung_mux_clock exynos5440_mux_clks[] __initdata = {
|
|
MUX(none, "mout_spi", mout_spi_p, MISC_DOUT1, 5, 1),
|
|
MUX_A(arm_clk, "arm_clk", mout_armclk_p,
|
|
CPU_CLK_STATUS, 0, 1, "armclk"),
|
|
};
|
|
|
|
/* divider clocks */
|
|
static struct samsung_div_clock exynos5440_div_clks[] __initdata = {
|
|
DIV(spi_baud, "div_spi", "mout_spi", MISC_DOUT1, 3, 2),
|
|
};
|
|
|
|
/* gate clocks */
|
|
static struct samsung_gate_clock exynos5440_gate_clks[] __initdata = {
|
|
GATE(pb0_250, "pb0_250", "div250", CLKEN_OV_VAL, 3, 0, 0),
|
|
GATE(pr0_250, "pr0_250", "div250", CLKEN_OV_VAL, 4, 0, 0),
|
|
GATE(pr1_250, "pr1_250", "div250", CLKEN_OV_VAL, 5, 0, 0),
|
|
GATE(b_250, "b_250", "div250", CLKEN_OV_VAL, 9, 0, 0),
|
|
GATE(b_125, "b_125", "div125", CLKEN_OV_VAL, 10, 0, 0),
|
|
GATE(b_200, "b_200", "div200", CLKEN_OV_VAL, 11, 0, 0),
|
|
GATE(sata, "sata", "div200", CLKEN_OV_VAL, 12, 0, 0),
|
|
GATE(usb, "usb", "div200", CLKEN_OV_VAL, 13, 0, 0),
|
|
GATE(gmac0, "gmac0", "div200", CLKEN_OV_VAL, 14, 0, 0),
|
|
GATE(cs250, "cs250", "div250", CLKEN_OV_VAL, 19, 0, 0),
|
|
GATE(pb0_250_o, "pb0_250_o", "pb0_250", CLKEN_OV_VAL, 3, 0, 0),
|
|
GATE(pr0_250_o, "pr0_250_o", "pr0_250", CLKEN_OV_VAL, 4, 0, 0),
|
|
GATE(pr1_250_o, "pr1_250_o", "pr1_250", CLKEN_OV_VAL, 5, 0, 0),
|
|
GATE(b_250_o, "b_250_o", "b_250", CLKEN_OV_VAL, 9, 0, 0),
|
|
GATE(b_125_o, "b_125_o", "b_125", CLKEN_OV_VAL, 10, 0, 0),
|
|
GATE(b_200_o, "b_200_o", "b_200", CLKEN_OV_VAL, 11, 0, 0),
|
|
GATE(sata_o, "sata_o", "sata", CLKEN_OV_VAL, 12, 0, 0),
|
|
GATE(usb_o, "usb_o", "usb", CLKEN_OV_VAL, 13, 0, 0),
|
|
GATE(gmac0_o, "gmac0_o", "gmac", CLKEN_OV_VAL, 14, 0, 0),
|
|
GATE(cs250_o, "cs250_o", "cs250", CLKEN_OV_VAL, 19, 0, 0),
|
|
};
|
|
|
|
static struct of_device_id ext_clk_match[] __initdata = {
|
|
{ .compatible = "samsung,clock-xtal", .data = (void *)0, },
|
|
{},
|
|
};
|
|
|
|
/* register exynos5440 clocks */
|
|
static void __init exynos5440_clk_init(struct device_node *np)
|
|
{
|
|
void __iomem *reg_base;
|
|
|
|
reg_base = of_iomap(np, 0);
|
|
if (!reg_base) {
|
|
pr_err("%s: failed to map clock controller registers,"
|
|
" aborting clock initialization\n", __func__);
|
|
return;
|
|
}
|
|
|
|
samsung_clk_init(np, reg_base, nr_clks, NULL, 0, NULL, 0);
|
|
samsung_clk_of_register_fixed_ext(exynos5440_fixed_rate_ext_clks,
|
|
ARRAY_SIZE(exynos5440_fixed_rate_ext_clks), ext_clk_match);
|
|
|
|
samsung_clk_register_pll2550x("cplla", "xtal", reg_base + 0x1c, 0x10);
|
|
samsung_clk_register_pll2550x("cpllb", "xtal", reg_base + 0x20, 0x10);
|
|
|
|
samsung_clk_register_fixed_rate(exynos5440_fixed_rate_clks,
|
|
ARRAY_SIZE(exynos5440_fixed_rate_clks));
|
|
samsung_clk_register_fixed_factor(exynos5440_fixed_factor_clks,
|
|
ARRAY_SIZE(exynos5440_fixed_factor_clks));
|
|
samsung_clk_register_mux(exynos5440_mux_clks,
|
|
ARRAY_SIZE(exynos5440_mux_clks));
|
|
samsung_clk_register_div(exynos5440_div_clks,
|
|
ARRAY_SIZE(exynos5440_div_clks));
|
|
samsung_clk_register_gate(exynos5440_gate_clks,
|
|
ARRAY_SIZE(exynos5440_gate_clks));
|
|
|
|
pr_info("Exynos5440: arm_clk = %ldHz\n", _get_rate("arm_clk"));
|
|
pr_info("exynos5440 clock initialization complete\n");
|
|
}
|
|
CLK_OF_DECLARE(exynos5440_clk, "samsung,exynos5440-clock", exynos5440_clk_init);
|