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>
Acked-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Vyacheslav Tyrtov <v.tyrtov@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

diff --git a/Documentation/devicetree/bindings/clock/exynos5410-clock.txt b/Documentation/devicetree/bindings/clock/exynos5410-clock.txt
new file mode 100644 (file)
index 0000000..604a75c
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/exynos5410-clock.txt
@@ -0,0 +1,54 @@
+* 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 - required.
+
+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: Required external clock.
+
+       fin_pll: clock-fin-pll {
+               compatible = "fixed-clock";
+               reg = <0>;
+               #clock-cells = <0>;
+               clock-frequency = <24000000>;
+               clock-output-names = "fin_pll";
+       };
+
+Example 3: 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 8eb4799237f03d5106cfe52537c587fb7fc648dd..b572dd73f8a3d11a745a424c6f90d7444d938424 100644 (file)
--- 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 (file)
index 0000000..858b3ff
--- /dev/null
+++ b/drivers/clk/samsung/clk-exynos5410.c
@@ -0,0 +1,239 @@
+/*
+ * 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 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(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)
+{
+       void __iomem *reg_base;
+
+       reg_base = of_iomap(np, 0);
+       if (!reg_base)
+               panic("%s: failed to map registers\n", __func__);
+
+       samsung_clk_init(np, reg_base, CLK_NR_CLKS,
+                       exynos5410_clk_regs, ARRAY_SIZE(exynos5410_clk_regs),
+                       NULL, 0);
+
+       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_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 (file)
index 0000000..3df181f
--- /dev/null
+++ b/include/dt-bindings/clock/exynos5410.h
@@ -0,0 +1,32 @@
+#ifndef _DT_BINDINGS_CLOCK_EXYNOS_5410_H
+#define _DT_BINDINGS_CLOCK_EXYNOS_5410_H
+
+/* core clocks */
+#define CLK_FOUT_APLL 1
+#define CLK_FOUT_CPLL 2
+#define CLK_FOUT_MPLL 3
+#define CLK_FOUT_BPLL 4
+#define CLK_FOUT_KPLL 5
+
+/* 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 */