![Stephen Boyd](/assets/img/avatar_default.png)
Clock provider drivers generally shouldn't include clk.h because it's the consumer API. Only include clk.h in files that are using it. The clkdev.h header isn't always used either, so remove it and add in slab.h where files were relying on it to include slab for them. Cc: Chanwoo Choi <cw00.choi@samsung.com> Cc: Sylwester Nawrocki <s.nawrocki@samsung.com> Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
157 lines
5.4 KiB
C
157 lines
5.4 KiB
C
/*
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* Copyright (c) 2013 Samsung Electronics Co., Ltd.
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* Author: Thomas Abraham <thomas.ab@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Common Clock Framework support for Exynos5440 SoC.
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*/
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#include <dt-bindings/clock/exynos5440.h>
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#include <linux/clk-provider.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/notifier.h>
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#include <linux/reboot.h>
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#include "clk.h"
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#include "clk-pll.h"
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#define CLKEN_OV_VAL 0xf8
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#define CPU_CLK_STATUS 0xfc
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#define MISC_DOUT1 0x558
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static void __iomem *reg_base;
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/* parent clock name list */
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PNAME(mout_armclk_p) = { "cplla", "cpllb" };
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PNAME(mout_spi_p) = { "div125", "div200" };
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/* fixed rate clocks generated outside the soc */
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static struct samsung_fixed_rate_clock exynos5440_fixed_rate_ext_clks[] __initdata = {
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FRATE(0, "xtal", NULL, CLK_IS_ROOT, 0),
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};
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/* fixed rate clocks */
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static struct samsung_fixed_rate_clock exynos5440_fixed_rate_clks[] __initdata = {
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FRATE(0, "ppll", NULL, CLK_IS_ROOT, 1000000000),
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FRATE(0, "usb_phy0", NULL, CLK_IS_ROOT, 60000000),
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FRATE(0, "usb_phy1", NULL, CLK_IS_ROOT, 60000000),
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FRATE(0, "usb_ohci12", NULL, CLK_IS_ROOT, 12000000),
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FRATE(0, "usb_ohci48", NULL, CLK_IS_ROOT, 48000000),
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};
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/* fixed factor clocks */
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static struct samsung_fixed_factor_clock exynos5440_fixed_factor_clks[] __initdata = {
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FFACTOR(0, "div250", "ppll", 1, 4, 0),
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FFACTOR(0, "div200", "ppll", 1, 5, 0),
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FFACTOR(0, "div125", "div250", 1, 2, 0),
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};
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/* mux clocks */
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static struct samsung_mux_clock exynos5440_mux_clks[] __initdata = {
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MUX(0, "mout_spi", mout_spi_p, MISC_DOUT1, 5, 1),
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MUX_A(CLK_ARM_CLK, "arm_clk", mout_armclk_p,
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CPU_CLK_STATUS, 0, 1, "armclk"),
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};
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/* divider clocks */
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static struct samsung_div_clock exynos5440_div_clks[] __initdata = {
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DIV(CLK_SPI_BAUD, "div_spi", "mout_spi", MISC_DOUT1, 3, 2),
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};
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/* gate clocks */
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static struct samsung_gate_clock exynos5440_gate_clks[] __initdata = {
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GATE(CLK_PB0_250, "pb0_250", "div250", CLKEN_OV_VAL, 3, 0, 0),
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GATE(CLK_PR0_250, "pr0_250", "div250", CLKEN_OV_VAL, 4, 0, 0),
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GATE(CLK_PR1_250, "pr1_250", "div250", CLKEN_OV_VAL, 5, 0, 0),
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GATE(CLK_B_250, "b_250", "div250", CLKEN_OV_VAL, 9, 0, 0),
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GATE(CLK_B_125, "b_125", "div125", CLKEN_OV_VAL, 10, 0, 0),
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GATE(CLK_B_200, "b_200", "div200", CLKEN_OV_VAL, 11, 0, 0),
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GATE(CLK_SATA, "sata", "div200", CLKEN_OV_VAL, 12, 0, 0),
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GATE(CLK_USB, "usb", "div200", CLKEN_OV_VAL, 13, 0, 0),
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GATE(CLK_GMAC0, "gmac0", "div200", CLKEN_OV_VAL, 14, 0, 0),
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GATE(CLK_CS250, "cs250", "div250", CLKEN_OV_VAL, 19, 0, 0),
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GATE(CLK_PB0_250_O, "pb0_250_o", "pb0_250", CLKEN_OV_VAL, 3, 0, 0),
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GATE(CLK_PR0_250_O, "pr0_250_o", "pr0_250", CLKEN_OV_VAL, 4, 0, 0),
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GATE(CLK_PR1_250_O, "pr1_250_o", "pr1_250", CLKEN_OV_VAL, 5, 0, 0),
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GATE(CLK_B_250_O, "b_250_o", "b_250", CLKEN_OV_VAL, 9, 0, 0),
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GATE(CLK_B_125_O, "b_125_o", "b_125", CLKEN_OV_VAL, 10, 0, 0),
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GATE(CLK_B_200_O, "b_200_o", "b_200", CLKEN_OV_VAL, 11, 0, 0),
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GATE(CLK_SATA_O, "sata_o", "sata", CLKEN_OV_VAL, 12, 0, 0),
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GATE(CLK_USB_O, "usb_o", "usb", CLKEN_OV_VAL, 13, 0, 0),
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GATE(CLK_GMAC0_O, "gmac0_o", "gmac", CLKEN_OV_VAL, 14, 0, 0),
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GATE(CLK_CS250_O, "cs250_o", "cs250", CLKEN_OV_VAL, 19, 0, 0),
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};
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static const struct of_device_id ext_clk_match[] __initconst = {
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{ .compatible = "samsung,clock-xtal", .data = (void *)0, },
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{},
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};
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static int exynos5440_clk_restart_notify(struct notifier_block *this,
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unsigned long code, void *unused)
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{
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u32 val, status;
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status = readl_relaxed(reg_base + 0xbc);
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val = readl_relaxed(reg_base + 0xcc);
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val = (val & 0xffff0000) | (status & 0xffff);
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writel_relaxed(val, reg_base + 0xcc);
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return NOTIFY_DONE;
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}
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/*
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* Exynos5440 Clock restart notifier, handles restart functionality
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*/
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static struct notifier_block exynos5440_clk_restart_handler = {
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.notifier_call = exynos5440_clk_restart_notify,
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.priority = 128,
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};
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/* register exynos5440 clocks */
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static void __init exynos5440_clk_init(struct device_node *np)
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{
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struct samsung_clk_provider *ctx;
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reg_base = of_iomap(np, 0);
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if (!reg_base) {
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pr_err("%s: failed to map clock controller registers,"
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" aborting clock initialization\n", __func__);
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return;
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}
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ctx = samsung_clk_init(np, reg_base, CLK_NR_CLKS);
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if (!ctx)
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panic("%s: unable to allocate context.\n", __func__);
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samsung_clk_of_register_fixed_ext(ctx, exynos5440_fixed_rate_ext_clks,
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ARRAY_SIZE(exynos5440_fixed_rate_ext_clks), ext_clk_match);
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samsung_clk_register_pll2550x("cplla", "xtal", reg_base + 0x1c, 0x10);
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samsung_clk_register_pll2550x("cpllb", "xtal", reg_base + 0x20, 0x10);
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samsung_clk_register_fixed_rate(ctx, exynos5440_fixed_rate_clks,
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ARRAY_SIZE(exynos5440_fixed_rate_clks));
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samsung_clk_register_fixed_factor(ctx, exynos5440_fixed_factor_clks,
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ARRAY_SIZE(exynos5440_fixed_factor_clks));
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samsung_clk_register_mux(ctx, exynos5440_mux_clks,
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ARRAY_SIZE(exynos5440_mux_clks));
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samsung_clk_register_div(ctx, exynos5440_div_clks,
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ARRAY_SIZE(exynos5440_div_clks));
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samsung_clk_register_gate(ctx, exynos5440_gate_clks,
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ARRAY_SIZE(exynos5440_gate_clks));
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samsung_clk_of_add_provider(np, ctx);
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if (register_restart_handler(&exynos5440_clk_restart_handler))
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pr_warn("exynos5440 clock can't register restart handler\n");
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pr_info("Exynos5440: arm_clk = %ldHz\n", _get_rate("arm_clk"));
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pr_info("exynos5440 clock initialization complete\n");
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}
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CLK_OF_DECLARE(exynos5440_clk, "samsung,exynos5440-clock", exynos5440_clk_init);
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