clk: exynos5410: register clocks using common clock framework

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>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

4 files changed, 288 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/clock/exynos5410-clock.txt b/Documentation/devicetree/bindings/clock/exynos5410-clock.txt
new file mode 100644
index 000000000000..aeab635b07b5
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/exynos5410-clock.txt
@@ -0,0 +1,45 @@
+* Samsung Exynos5410 Clock Controller
+
+The Exynos5410 clock controller generates and supplies clock to various
+controllers within the Exynos5410 SoC.
+
+Required Properties:
+
+- compatible: should be "samsung,exynos5410-clock"
+
+- reg: physical base address of the controller and length of memory mapped
+  region.
+
+- #clock-cells: should be 1.
+
+All available clocks are defined as preprocessor macros in
+dt-bindings/clock/exynos5410.h header and can be used in device
+tree sources.
+
+External clock:
+
+There is clock that is generated outside the SoC. It
+is expected that it is defined using standard clock bindings
+with following clock-output-name:
+
+ - "fin_pll" - PLL input clock from XXTI
+
+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@12C20000 {
+                compatible = "samsung,exynos4210-uart";
+                reg = <0x12C00000 0x100>;
+                interrupts = <0 51 0>;
+                clocks = <&clock CLK_UART0>, <&clock CLK_SCLK_UART0>;
+                clock-names = "uart", "clk_uart_baud0";
+        };
diff --git a/drivers/clk/samsung/Makefile b/drivers/clk/samsung/Makefile
index 25646c61a02b..69e81773164e 100644
--- a/drivers/clk/samsung/Makefile
+++ b/drivers/clk/samsung/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_SOC_EXYNOS3250)	+= clk-exynos3250.o
 obj-$(CONFIG_ARCH_EXYNOS4)      += clk-exynos4.o
 obj-$(CONFIG_SOC_EXYNOS5250)    += clk-exynos5250.o
 obj-$(CONFIG_SOC_EXYNOS5260)    += clk-exynos5260.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 000000000000..c9505ab9ee70
--- /dev/null
+++ b/drivers/clk/samsung/clk-exynos5410.c
@@ -0,0 +1,209 @@
+/*
+ * 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 <dt-bindings/clock/exynos5410.h>
+
+#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"
+
+#define APLL_LOCK               0x0
+#define APLL_CON0               0x100
+#define CPLL_LOCK               0x10020
+#define CPLL_CON0               0x10120
+#define MPLL_LOCK               0x4000
+#define MPLL_CON0               0x4100
+#define BPLL_LOCK               0x20010
+#define BPLL_CON0               0x20110
+#define KPLL_LOCK               0x28000
+#define KPLL_CON0               0x28100
+
+#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 exynos5410_plls {
+        apll, cpll, mpll,
+        bpll, kpll,
+        nr_plls                 /* number of PLLs */
+};
+
+/* 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(group2_p)         = { "fin_pll", "fin_pll", "none", "none",
+                        "none", "none", "sclk_mpll_bpll",
+                         "none", "none", "sclk_cpll" };
+
+static struct samsung_mux_clock exynos5410_mux_clks[] __initdata = {
+        MUX(0, "mout_apll", apll_p, SRC_CPU, 0, 1),
+        MUX(0, "mout_cpu", mout_cpu_p, SRC_CPU, 16, 1),
+
+        MUX(0, "mout_kpll", kpll_p, SRC_KFC, 0, 1),
+        MUX(0, "mout_kfc", mout_kfc_p, SRC_KFC, 16, 1),
+
+        MUX(0, "sclk_mpll", mpll_p, SRC_CPERI1, 8, 1),
+        MUX(0, "sclk_mpll_muxed", mpll_user_p, SRC_TOP2, 20, 1),
+
+        MUX(0, "sclk_bpll", bpll_p, SRC_CDREX, 0, 1),
+        MUX(0, "sclk_bpll_muxed", bpll_user_p, SRC_TOP2, 24, 1),
+
+        MUX(0, "sclk_cpll", cpll_p, SRC_TOP2, 8, 1),
+
+        MUX(0, "sclk_mpll_bpll", mpll_bpll_p, SRC_TOP1, 20, 1),
+
+        MUX(0, "mout_mmc0", group2_p, SRC_FSYS, 0, 4),
+        MUX(0, "mout_mmc1", group2_p, SRC_FSYS, 4, 4),
+        MUX(0, "mout_mmc2", group2_p, SRC_FSYS, 8, 4),
+
+        MUX(0, "mout_uart0", group2_p, SRC_PERIC0, 0, 4),
+        MUX(0, "mout_uart1", group2_p, SRC_PERIC0, 4, 4),
+        MUX(0, "mout_uart2", group2_p, SRC_PERIC0, 8, 4),
+
+        MUX(0, "mout_aclk200", mpll_bpll_p, SRC_TOP0, 12, 1),
+        MUX(0, "mout_aclk400", mpll_bpll_p, SRC_TOP0, 20, 1),
+};
+
+static struct samsung_div_clock exynos5410_div_clks[] __initdata = {
+        DIV(0, "div_arm", "mout_cpu", DIV_CPU0, 0, 3),
+        DIV(0, "div_arm2", "div_arm", DIV_CPU0, 28, 3),
+
+        DIV(0, "div_acp", "div_arm2", DIV_CPU0, 8, 3),
+        DIV(0, "div_cpud", "div_arm2", DIV_CPU0, 4, 3),
+        DIV(0, "div_atb", "div_arm2", DIV_CPU0, 16, 3),
+        DIV(0, "pclk_dbg", "div_arm2", DIV_CPU0, 20, 3),
+
+        DIV(0, "div_kfc", "mout_kfc", DIV_KFC0, 0, 3),
+        DIV(0, "div_aclk", "div_kfc", DIV_KFC0, 4, 3),
+        DIV(0, "div_pclk", "div_kfc", DIV_KFC0, 20, 3),
+
+        DIV(0, "aclk66_pre", "sclk_mpll_muxed", DIV_TOP1, 24, 3),
+        DIV(0, "aclk66", "aclk66_pre", DIV_TOP0, 0, 3),
+
+        DIV(0, "div_mmc0", "mout_mmc0", DIV_FSYS1, 0, 4),
+        DIV(0, "div_mmc1", "mout_mmc1", DIV_FSYS1, 16, 4),
+        DIV(0, "div_mmc2", "mout_mmc2", DIV_FSYS2, 0, 4),
+
+        DIV_F(0, "div_mmc_pre0", "div_mmc0",
+                        DIV_FSYS1, 8, 8, CLK_SET_RATE_PARENT, 0),
+        DIV_F(0, "div_mmc_pre1", "div_mmc1",
+                        DIV_FSYS1, 24, 8, CLK_SET_RATE_PARENT, 0),
+        DIV_F(0, "div_mmc_pre2", "div_mmc2",
+                        DIV_FSYS2, 8, 8, CLK_SET_RATE_PARENT, 0),
+
+        DIV(0, "div_uart0", "mout_uart0", DIV_PERIC0, 0, 4),
+        DIV(0, "div_uart1", "mout_uart1", DIV_PERIC0, 4, 4),
+        DIV(0, "div_uart2", "mout_uart2", DIV_PERIC0, 8, 4),
+        DIV(0, "div_uart3", "mout_uart3", DIV_PERIC0, 12, 4),
+
+        DIV(0, "aclk200", "mout_aclk200", DIV_TOP0, 12, 3),
+        DIV(0, "aclk400", "mout_aclk400", DIV_TOP0, 24, 3),
+};
+
+static struct samsung_gate_clock exynos5410_gate_clks[] __initdata = {
+        GATE(CLK_MCT, "mct", "aclk66", GATE_IP_PERIS, 18, 0, 0),
+
+        GATE(CLK_SCLK_MMC0, "sclk_mmc0", "div_mmc_pre0",
+                        SRC_MASK_FSYS, 0, CLK_SET_RATE_PARENT, 0),
+        GATE(CLK_SCLK_MMC1, "sclk_mmc1", "div_mmc_pre1",
+                        SRC_MASK_FSYS, 4, CLK_SET_RATE_PARENT, 0),
+        GATE(CLK_SCLK_MMC2, "sclk_mmc2", "div_mmc_pre2",
+                        SRC_MASK_FSYS, 8, CLK_SET_RATE_PARENT, 0),
+
+        GATE(CLK_MMC0, "sdmmc0", "aclk200", GATE_BUS_FSYS0, 12, 0, 0),
+        GATE(CLK_MMC1, "sdmmc1", "aclk200", GATE_BUS_FSYS0, 13, 0, 0),
+        GATE(CLK_MMC2, "sdmmc2", "aclk200", GATE_BUS_FSYS0, 14, 0, 0),
+
+        GATE(CLK_UART0, "uart0", "aclk66", GATE_IP_PERIC, 0, 0, 0),
+        GATE(CLK_UART1, "uart1", "aclk66", GATE_IP_PERIC, 1, 0, 0),
+        GATE(CLK_UART2, "uart2", "aclk66", GATE_IP_PERIC, 2, 0, 0),
+
+        GATE(CLK_SCLK_UART0, "sclk_uart0", "div_uart0",
+                        SRC_MASK_PERIC0, 0, CLK_SET_RATE_PARENT, 0),
+        GATE(CLK_SCLK_UART1, "sclk_uart1", "div_uart1",
+                        SRC_MASK_PERIC0, 4, CLK_SET_RATE_PARENT, 0),
+        GATE(CLK_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, CLK_FOUT_APLL, "fout_apll", "fin_pll", APLL_LOCK,
+                APLL_CON0, NULL),
+        [cpll] = PLL(pll_35xx, CLK_FOUT_CPLL, "fout_cpll", "fin_pll", CPLL_LOCK,
+                CPLL_CON0, NULL),
+        [mpll] = PLL(pll_35xx, CLK_FOUT_MPLL, "fout_mpll", "fin_pll", MPLL_LOCK,
+                MPLL_CON0, NULL),
+        [bpll] = PLL(pll_35xx, CLK_FOUT_BPLL, "fout_bpll", "fin_pll", BPLL_LOCK,
+                BPLL_CON0, NULL),
+        [kpll] = PLL(pll_35xx, CLK_FOUT_KPLL, "fout_kpll", "fin_pll", KPLL_LOCK,
+                KPLL_CON0, NULL),
+};
+
+/* register exynos5410 clocks */
+static void __init exynos5410_clk_init(struct device_node *np)
+{
+        struct samsung_clk_provider *ctx;
+        void __iomem *reg_base;
+
+        reg_base = of_iomap(np, 0);
+        if (!reg_base)
+                panic("%s: failed to map registers\n", __func__);
+
+        ctx = samsung_clk_init(np, reg_base, CLK_NR_CLKS);
+
+        samsung_clk_register_pll(ctx, exynos5410_plls,
+                        ARRAY_SIZE(exynos5410_plls), reg_base);
+
+        samsung_clk_register_mux(ctx, exynos5410_mux_clks,
+                        ARRAY_SIZE(exynos5410_mux_clks));
+        samsung_clk_register_div(ctx, exynos5410_div_clks,
+                        ARRAY_SIZE(exynos5410_div_clks));
+        samsung_clk_register_gate(ctx, exynos5410_gate_clks,
+                        ARRAY_SIZE(exynos5410_gate_clks));
+
+        pr_debug("Exynos5410: clock setup completed.\n");
+}
+CLK_OF_DECLARE(exynos5410_clk, "samsung,exynos5410-clock", exynos5410_clk_init);
diff --git a/include/dt-bindings/clock/exynos5410.h b/include/dt-bindings/clock/exynos5410.h
new file mode 100644
index 000000000000..9b180f032e2d
--- /dev/null
+++ b/include/dt-bindings/clock/exynos5410.h
@@ -0,0 +1,33 @@
+#ifndef _DT_BINDINGS_CLOCK_EXYNOS_5410_H
+#define _DT_BINDINGS_CLOCK_EXYNOS_5410_H
+
+/* core clocks */
+#define CLK_FIN_PLL 1
+#define CLK_FOUT_APLL 2
+#define CLK_FOUT_CPLL 3
+#define CLK_FOUT_MPLL 4
+#define CLK_FOUT_BPLL 5
+#define CLK_FOUT_KPLL 6
+
+/* gate for special clocks (sclk) */
+#define CLK_SCLK_UART0 128
+#define CLK_SCLK_UART1 129
+#define CLK_SCLK_UART2 130
+#define CLK_SCLK_UART3 131
+#define CLK_SCLK_MMC0 132
+#define CLK_SCLK_MMC1 133
+#define CLK_SCLK_MMC2 134
+
+/* gate clocks */
+#define CLK_UART0 257
+#define CLK_UART1 258
+#define CLK_UART2 259
+#define CLK_UART3 260
+#define CLK_MCT 315
+#define CLK_MMC0 351
+#define CLK_MMC1 352
+#define CLK_MMC2 353
+
+#define CLK_NR_CLKS 512
+
+#endif /* _DT_BINDINGS_CLOCK_EXYNOS_5410_H */