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Subject[PATCH 2/6] clk: exynos5410: register clocks using common clock framework
Date
From: Tarek Dakhran <t.dakhran@samsung.com>

The EXYNOS5410 clocks are statically listed and registered
using the Samsung specific common clock helper functions.

Signed-off-by: Tarek Dakhran <t.dakhran@samsung.com>
Signed-off-by: Vyacheslav Tyrtov <v.tyrtov@samsung.com>
---
.../devicetree/bindings/clock/exynos5410-clock.txt | 72 ++++++
drivers/clk/samsung/Makefile | 1 +
drivers/clk/samsung/clk-exynos5410.c | 274 +++++++++++++++++++++
3 files changed, 347 insertions(+)
create mode 100644 Documentation/devicetree/bindings/clock/exynos5410-clock.txt
create mode 100644 drivers/clk/samsung/clk-exynos5410.c

diff --git a/Documentation/devicetree/bindings/clock/exynos5410-clock.txt b/Documentation/devicetree/bindings/clock/exynos5410-clock.txt
new file mode 100644
index 0000000..8c3a7c2
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/exynos5410-clock.txt
@@ -0,0 +1,72 @@
+* Samsung Exynos5410 Clock Controller
+
+The Exynos5410 clock controller generates and supplies clock to various
+controllers within the Exynos5410 SoC.
+
+Required Properties:
+
+- comptible: should be one of the following.
+ - "samsung,exynos5410-clock" - controller compatible with Exynos5410 SoC.
+
+- reg: physical base address of the controller and length of memory mapped
+ region.
+
+- #clock-cells: should be 1.
+
+The following is the list of clocks generated by the controller. Each clock is
+assigned an identifier and client nodes use this identifier to specify the
+clock which they consume.
+
+
+ [Core Clocks]
+
+ Clock ID
+ ----------------------------
+
+ fin_pll 1
+
+ [Clock Gate for Special Clocks]
+
+ Clock ID
+ ----------------------------
+ sclk_uart0 128
+ sclk_uart1 129
+ sclk_uart2 130
+ sclk_uart3 131
+ sclk_mmc0 132
+ sclk_mmc1 133
+ sclk_mmc2 134
+
+ [Peripheral Clock Gates]
+
+ Clock ID
+ ----------------------------
+
+ uart0 257
+ uart1 258
+ uart2 259
+ uart3 260
+ mct 315
+ mmc0 351
+ mmc1 352
+ mmc2 353
+
+Example 1: An example of a clock controller node is listed below.
+
+ clock: clock-controller@0x10010000 {
+ compatible = "samsung,exynos5410-clock";
+ reg = <0x10010000 0x30000>;
+ #clock-cells = <1>;
+ };
+
+Example 2: UART controller node that consumes the clock generated by the clock
+ controller. Refer to the standard clock bindings for information
+ about 'clocks' and 'clock-names' property.
+
+ serial@13820000 {
+ compatible = "samsung,exynos4210-uart";
+ reg = <0x13820000 0x100>;
+ interrupts = <0 54 0>;
+ clocks = <&clock 259>, <&clock 130>;
+ clock-names = "uart", "clk_uart_baud0";
+ };
diff --git a/drivers/clk/samsung/Makefile b/drivers/clk/samsung/Makefile
index 3413380..5a446ca 100644
--- a/drivers/clk/samsung/Makefile
+++ b/drivers/clk/samsung/Makefile
@@ -5,6 +5,7 @@
obj-$(CONFIG_COMMON_CLK) += clk.o clk-pll.o
obj-$(CONFIG_ARCH_EXYNOS4) += clk-exynos4.o
obj-$(CONFIG_SOC_EXYNOS5250) += clk-exynos5250.o
+obj-$(CONFIG_SOC_EXYNOS5410) += clk-exynos5410.o
obj-$(CONFIG_SOC_EXYNOS5420) += clk-exynos5420.o
obj-$(CONFIG_SOC_EXYNOS5440) += clk-exynos5440.o
obj-$(CONFIG_ARCH_EXYNOS) += clk-exynos-audss.o
diff --git a/drivers/clk/samsung/clk-exynos5410.c b/drivers/clk/samsung/clk-exynos5410.c
new file mode 100644
index 0000000..a5d6cac
--- /dev/null
+++ b/drivers/clk/samsung/clk-exynos5410.c
@@ -0,0 +1,274 @@
+/*
+ * Copyright (c) 2013 Samsung Electronics Co., Ltd.
+ * Author: Tarek Dakhran <t.dakhran@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 Exynos5410 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 SRC_CPU 0x200
+#define DIV_CPU0 0x500
+#define SRC_CPERI1 0x4204
+#define DIV_TOP0 0x10510
+#define DIV_TOP1 0x10514
+#define DIV_FSYS1 0x1054c
+#define DIV_FSYS2 0x10550
+#define DIV_PERIC0 0x10558
+#define SRC_TOP0 0x10210
+#define SRC_TOP1 0x10214
+#define SRC_TOP2 0x10218
+#define SRC_FSYS 0x10244
+#define SRC_PERIC0 0x10250
+#define SRC_MASK_FSYS 0x10340
+#define SRC_MASK_PERIC0 0x10350
+#define GATE_BUS_FSYS0 0x10740
+#define GATE_IP_FSYS 0x10944
+#define GATE_IP_PERIC 0x10950
+#define GATE_IP_PERIS 0x10960
+#define SRC_CDREX 0x20200
+#define SRC_KFC 0x28200
+#define DIV_KFC0 0x28500
+
+/* list of PLLs */
+enum exynos5420_plls {
+ apll, cpll, mpll,
+ bpll, kpll,
+ nr_plls /* number of PLLs */
+};
+
+enum exynos5410_clks {
+ none,
+
+ /* core clocks */
+ fin_pll, fout_apll, fout_cpll, fout_mpll, fout_bpll, fout_kpll,
+
+ /* gate for special clocks (sclk) */
+ sclk_uart0 = 128, sclk_uart1, sclk_uart2, sclk_uart3, sclk_mmc0,
+ sclk_mmc1, sclk_mmc2,
+
+ /* gate clocks */
+ aclk66_peric = 256, uart0, uart1, uart2, uart3,
+ mct = 315,
+ sdmmc0 = 351, sdmmc1, sdmmc2,
+
+ nr_clks,
+};
+
+/*
+ * list of controller registers to be saved and restored during a
+ * suspend/resume cycle.
+ */
+
+static unsigned long exynos5410_clk_regs[] __initdata = {
+ SRC_CPU,
+ DIV_CPU0,
+ SRC_CPERI1,
+ DIV_TOP0,
+ DIV_TOP1,
+ DIV_FSYS1,
+ DIV_FSYS2,
+ DIV_PERIC0,
+ SRC_TOP0,
+ SRC_TOP1,
+ SRC_TOP2,
+ SRC_FSYS,
+ SRC_PERIC0,
+ SRC_MASK_FSYS,
+ SRC_MASK_PERIC0,
+ GATE_BUS_FSYS0,
+ GATE_IP_FSYS,
+ GATE_IP_PERIC,
+ GATE_IP_PERIS,
+ SRC_CDREX,
+ SRC_KFC,
+ DIV_KFC0,
+};
+
+/* list of all parent clocks */
+
+PNAME(apll_p) = { "fin_pll", "fout_apll", };
+PNAME(bpll_p) = { "fin_pll", "fout_bpll", };
+PNAME(cpll_p) = { "fin_pll", "fout_cpll" };
+PNAME(mpll_p) = { "fin_pll", "fout_mpll", };
+PNAME(kpll_p) = { "fin_pll", "fout_kpll", };
+
+PNAME(mout_cpu_p) = { "mout_apll", "sclk_mpll", };
+PNAME(mout_kfc_p) = { "mout_kpll", "sclk_mpll", };
+
+PNAME(mpll_user_p) = { "fin_pll", "sclk_mpll", };
+PNAME(bpll_user_p) = { "fin_pll", "sclk_bpll", };
+PNAME(mpll_bpll_p) = { "sclk_mpll_muxed", "sclk_bpll_muxed", };
+
+
+
+PNAME(group_main) = { "fin_pll", "fin_pll",
+ "sclk_hdmi27m", "sclk_dptxphty",
+ "sclk_usbhost20phy", "sclk_hdmiphy",
+ "sclk_mpll_bpll", "sclk_epll",
+ "sclk_vpll", "sclk_cpll" };
+
+/* fixed rate clocks generated outside the soc */
+struct samsung_fixed_rate_clock exynos5410_fixed_rate_ext_clks[] __initdata = {
+ FRATE(fin_pll, "fin_pll", NULL, CLK_IS_ROOT, 0),
+};
+
+struct samsung_mux_clock exynos5410_mux_clks[] __initdata = {
+ MUX_A(none, "mout_apll", apll_p, SRC_CPU, 0, 1, "mout_apll"),
+ MUX_A(none, "mout_cpu", mout_cpu_p, SRC_CPU, 16, 1, "mout_cpu"),
+
+ MUX_A(none, "mout_kpll", kpll_p, SRC_KFC, 0, 1, "mout_kpll"),
+ MUX_A(none, "mout_kfc", mout_kfc_p, SRC_KFC, 16, 1, "mout_kfc"),
+
+ MUX(none, "sclk_mpll", mpll_p, SRC_CPERI1, 8, 1),
+ MUX(none, "sclk_mpll_muxed", mpll_user_p, SRC_TOP2, 20, 1),
+
+ MUX(none, "sclk_bpll", bpll_p, SRC_CDREX, 0, 1),
+ MUX(none, "sclk_bpll_muxed", bpll_user_p, SRC_TOP2, 24, 1),
+
+ MUX(none, "sclk_cpll", cpll_p, SRC_TOP2, 8, 1),
+
+ MUX(none, "sclk_mpll_bpll", mpll_bpll_p, SRC_TOP1, 20, 1),
+
+ MUX(none, "mout_mmc0", group_main, SRC_FSYS, 0, 4),
+ MUX(none, "mout_mmc1", group_main, SRC_FSYS, 4, 4),
+ MUX(none, "mout_mmc2", group_main, SRC_FSYS, 8, 4),
+
+ MUX(none, "mout_uart0", group_main, SRC_PERIC0, 0, 4),
+ MUX(none, "mout_uart1", group_main, SRC_PERIC0, 4, 4),
+ MUX(none, "mout_uart2", group_main, SRC_PERIC0, 8, 4),
+
+ MUX(none, "mout_aclk200", mpll_bpll_p, SRC_TOP0, 12, 1),
+ MUX(none, "mout_aclk400", mpll_bpll_p, SRC_TOP0, 20, 1),
+};
+
+struct samsung_div_clock exynos5410_div_clks[] __initdata = {
+
+ DIV(none, "div_arm", "mout_cpu", DIV_CPU0, 0, 3),
+ DIV(none, "div_arm2", "div_arm", DIV_CPU0, 28, 3),
+
+ DIV_A(none, "div_acp", "div_arm2", DIV_CPU0, 8, 3, "cpu_arm_clk"),
+ DIV_A(none, "div_cpud", "div_arm2", DIV_CPU0, 4, 3, "cpu_aclk_cpud"),
+ DIV_A(none, "div_atb", "div_arm2", DIV_CPU0, 16, 3, "cpu_atclk"),
+ DIV_A(none, "pclk_dbg", "div_arm2", DIV_CPU0, 20, 3, "cpu_pclk_dbg"),
+
+
+ DIV_A(none, "div_kfc", "mout_kfc", DIV_KFC0, 0, 3, "kfc_arm_clk"),
+ DIV_A(none, "div_aclk", "div_kfc", DIV_KFC0, 4, 3, "kfc_aclk_cpud"),
+ DIV_A(none, "div_pclk", "div_kfc", DIV_KFC0, 20, 3, "kfc_pclk_dbg"),
+
+
+ DIV(none, "aclk66_pre", "sclk_mpll_muxed", DIV_TOP1, 24, 3),
+ DIV(none, "aclk66", "aclk66_pre", DIV_TOP0, 0, 3),
+
+ DIV(none, "div_mmc0", "mout_mmc0", DIV_FSYS1, 0, 4),
+ DIV(none, "div_mmc1", "mout_mmc1", DIV_FSYS1, 16, 4),
+ DIV(none, "div_mmc2", "mout_mmc2", DIV_FSYS2, 0, 4),
+
+ DIV_F(none, "div_mmc_pre0", "div_mmc0",
+ DIV_FSYS1, 8, 8, CLK_SET_RATE_PARENT, 0),
+ DIV_F(none, "div_mmc_pre1", "div_mmc1",
+ DIV_FSYS1, 24, 8, CLK_SET_RATE_PARENT, 0),
+ DIV_F(none, "div_mmc_pre2", "div_mmc2",
+ DIV_FSYS2, 8, 8, CLK_SET_RATE_PARENT, 0),
+
+ DIV(none, "div_uart0", "mout_uart0", DIV_PERIC0, 0, 4),
+ DIV(none, "div_uart1", "mout_uart1", DIV_PERIC0, 4, 4),
+ DIV(none, "div_uart2", "mout_uart2", DIV_PERIC0, 8, 4),
+ DIV(none, "div_uart3", "mout_uart3", DIV_PERIC0, 12, 4),
+
+ DIV(none, "aclk200", "mout_aclk200", DIV_TOP0, 12, 3),
+ DIV(none, "aclk400", "mout_aclk400", DIV_TOP0, 24, 3),
+};
+
+struct samsung_gate_clock exynos5410_gate_clks[] __initdata = {
+
+ GATE(mct, "mct", "aclk66", GATE_IP_PERIS, 18, 0, 0),
+
+ GATE(sclk_mmc0, "sclk_mmc0", "div_mmc_pre0",
+ SRC_MASK_FSYS, 0, CLK_SET_RATE_PARENT, 0),
+ GATE(sclk_mmc1, "sclk_mmc1", "div_mmc_pre1",
+ SRC_MASK_FSYS, 4, CLK_SET_RATE_PARENT, 0),
+ GATE(sclk_mmc2, "sclk_mmc2", "div_mmc_pre2",
+ SRC_MASK_FSYS, 8, CLK_SET_RATE_PARENT, 0),
+
+ GATE(sdmmc0, "sdmmc0", "aclk200", GATE_BUS_FSYS0, 12, 0, 0),
+ GATE(sdmmc1, "sdmmc1", "aclk200", GATE_BUS_FSYS0, 13, 0, 0),
+ GATE(sdmmc2, "sdmmc2", "aclk200", GATE_BUS_FSYS0, 14, 0, 0),
+
+ GATE(uart0, "uart0", "aclk66", GATE_IP_PERIC, 0, 0, 0),
+ GATE(uart1, "uart1", "aclk66", GATE_IP_PERIC, 1, 0, 0),
+ GATE(uart2, "uart2", "aclk66", GATE_IP_PERIC, 2, 0, 0),
+
+ GATE(sclk_uart0, "sclk_uart0", "div_uart0",
+ SRC_MASK_PERIC0, 0, CLK_SET_RATE_PARENT, 0),
+ GATE(sclk_uart1, "sclk_uart1", "div_uart1",
+ SRC_MASK_PERIC0, 4, CLK_SET_RATE_PARENT, 0),
+ GATE(sclk_uart2, "sclk_uart2", "div_uart2",
+ SRC_MASK_PERIC0, 8, CLK_SET_RATE_PARENT, 0),
+
+};
+
+static struct samsung_pll_clock exynos5410_plls[nr_plls] __initdata = {
+ [apll] = PLL(pll_35xx, fout_apll, "fout_apll", "fin_pll", 0x0,
+ 0x100, NULL),
+ [cpll] = PLL(pll_35xx, fout_mpll, "fout_cpll", "fin_pll", 0x10020,
+ 0x10120, NULL),
+ [mpll] = PLL(pll_35xx, fout_mpll, "fout_mpll", "fin_pll", 0x4000,
+ 0x4100, NULL),
+ [bpll] = PLL(pll_35xx, fout_bpll, "fout_bpll", "fin_pll", 0x20010,
+ 0x20110, NULL),
+ [kpll] = PLL(pll_35xx, fout_kpll, "fout_kpll", "fin_pll", 0x28000,
+ 0x28100, NULL),
+};
+
+static struct of_device_id ext_clk_match[] __initdata = {
+ { .compatible = "samsung,exynos5410-oscclk", .data = (void *)0, },
+ { },
+};
+
+DEFINE_SPINLOCK(int_div_lock);
+
+/* register exynos5410 clocks */
+void __init exynos5410_clk_init(struct device_node *np)
+{
+ void __iomem *reg_base;
+
+ if (np) {
+ reg_base = of_iomap(np, 0);
+ if (!reg_base)
+ panic("%s: failed to map registers\n", __func__);
+ } else {
+ panic("%s: unable to determine soc\n", __func__);
+ }
+
+ samsung_clk_init(np, reg_base, nr_clks,
+ exynos5410_clk_regs, ARRAY_SIZE(exynos5410_clk_regs),
+ NULL, 0);
+ samsung_clk_of_register_fixed_ext(exynos5410_fixed_rate_ext_clks,
+ ARRAY_SIZE(exynos5410_fixed_rate_ext_clks),
+ ext_clk_match);
+ samsung_clk_register_pll(exynos5410_plls, ARRAY_SIZE(exynos5410_plls),
+ reg_base);
+
+ samsung_clk_register_mux(exynos5410_mux_clks,
+ ARRAY_SIZE(exynos5410_mux_clks));
+ samsung_clk_register_div(exynos5410_div_clks,
+ ARRAY_SIZE(exynos5410_div_clks));
+ samsung_clk_register_gate(exynos5410_gate_clks,
+ ARRAY_SIZE(exynos5410_gate_clks));
+
+ pr_info("Exynos5410: clock setup completed.\n");
+}
+CLK_OF_DECLARE(exynos5410_clk, "samsung,exynos5410-clock", exynos5410_clk_init);
--
1.8.1.5


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