[PATCH v2 2/7 RE-SEND] ARM: S5P6442: Add clock support for S5P6442
Kukjin Kim
kgene.kim at samsung.com
Thu Jan 28 22:49:53 EST 2010
This patch adds clock support for S5P6442. This patch adds the clock
register definitions and the various system clocks in S5P6442.
Signed-off-by: Adityapratap Sharma <aditya.ps at samsung.com>
Signed-off-by: Atul Dahiya <atul.dahiya at samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim at samsung.com>
---
arch/arm/mach-s5p6442/Makefile | 2 +-
arch/arm/mach-s5p6442/clock.c | 247 +++++++++++++++++++++++
arch/arm/mach-s5p6442/include/mach/pwm-clock.h | 62 ++++++
arch/arm/mach-s5p6442/include/mach/regs-clock.h | 103 ++++++++++
arch/arm/mach-s5p6442/include/mach/tick.h | 24 +++
5 files changed, 437 insertions(+), 1 deletions(-)
create mode 100644 arch/arm/mach-s5p6442/clock.c
create mode 100644 arch/arm/mach-s5p6442/include/mach/pwm-clock.h
create mode 100644 arch/arm/mach-s5p6442/include/mach/regs-clock.h
create mode 100644 arch/arm/mach-s5p6442/include/mach/tick.h
diff --git a/arch/arm/mach-s5p6442/Makefile b/arch/arm/mach-s5p6442/Makefile
index 0a45d01..f1b3e75 100644
--- a/arch/arm/mach-s5p6442/Makefile
+++ b/arch/arm/mach-s5p6442/Makefile
@@ -12,7 +12,7 @@ obj- :=
# Core support for S5P6442 system
-obj-$(CONFIG_CPU_S5P6442) += cpu.o init.o
+obj-$(CONFIG_CPU_S5P6442) += cpu.o init.o clock.o
# machine support
diff --git a/arch/arm/mach-s5p6442/clock.c b/arch/arm/mach-s5p6442/clock.c
new file mode 100644
index 0000000..e8ba43e
--- /dev/null
+++ b/arch/arm/mach-s5p6442/clock.c
@@ -0,0 +1,246 @@
+/* linux/arch/arm/mach-s5p6442/clock.c
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * S5P6442 - Clock support
+ *
+ * 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.
+*/
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/sysdev.h>
+#include <linux/io.h>
+
+#include <mach/map.h>
+
+#include <plat/cpu-freq.h>
+#include <mach/regs-clock.h>
+#include <plat/clock.h>
+#include <plat/cpu.h>
+#include <plat/pll.h>
+#include <plat/s5p-clock.h>
+#include <plat/clock-clksrc.h>
+#include <plat/s5p6442.h>
+
+static struct clk clk_pd1 = {
+ .name = "pclkd1",
+ .id = -1,
+ .ops = &clk_ops_def_setrate,
+};
+
+static struct clksrc_clk clk_mout_apll = {
+ .clk = {
+ .name = "mout_apll",
+ .id = -1,
+ },
+ .sources = &clk_src_apll,
+ .reg_src = { .reg = S5P_CLK_SRC0, .shift = 0, .size = 1 },
+};
+
+static struct clksrc_clk clk_mout_epll = {
+ .clk = {
+ .name = "mout_epll",
+ .id = -1,
+ },
+ .sources = &clk_src_epll,
+ .reg_src = { .reg = S5P_CLK_SRC0, .shift = 8, .size = 1 },
+};
+
+static struct clksrc_clk clk_mout_mpll = {
+ .clk = {
+ .name = "mout_mpll",
+ .id = -1,
+ },
+ .sources = &clk_src_mpll,
+ .reg_src = { .reg = S5P_CLK_SRC0, .shift = 4, .size = 1 },
+};
+
+int s5p6442_clk_ip3_ctrl(struct clk *clk, int enable)
+{
+ return s5p_gatectrl(S5P_CLKGATE_IP3, clk, enable);
+}
+
+/* Clock initialisation code */
+static struct clksrc_clk *init_parents[] = {
+ &clk_mout_apll,
+ &clk_mout_epll,
+ &clk_mout_mpll,
+};
+
+#define GET_DIV(clk, field) ((((clk) & field##_MASK) >> field##_SHIFT) + 1)
+
+void __init_or_cpufreq s5p6442_setup_clocks(void)
+{
+ struct clk *xtal_clk;
+ unsigned long xtal;
+ unsigned long fclk;
+ unsigned long a2m;
+ unsigned long epll;
+ unsigned long apll;
+ unsigned long mpll;
+ unsigned int ptr;
+ unsigned long hclkd0 = 0;
+ unsigned long hclkd1 = 0;
+ unsigned long pclkd0 = 0;
+ unsigned long pclkd1 = 0;
+ u32 clkdiv0;
+ u32 clkdiv3;
+ u32 mux_stat0;
+ u32 mux_stat1;
+
+ printk(KERN_DEBUG "%s: registering clocks\n", __func__);
+
+ clkdiv0 = __raw_readl(S5P_CLK_DIV0);
+ printk(KERN_DEBUG "%s: clkdiv0 = %08x\n", __func__, clkdiv0);
+
+ clkdiv3 = __raw_readl(S5P_CLK_DIV3);
+ printk(KERN_DEBUG "%s: clkdiv3 = %08x\n", __func__, clkdiv3);
+
+ xtal_clk = clk_get(NULL, "xtal");
+ BUG_ON(IS_ERR(xtal_clk));
+
+ xtal = clk_get_rate(xtal_clk);
+ clk_put(xtal_clk);
+
+ printk(KERN_DEBUG "%s: xtal is %ld\n", __func__, xtal);
+
+ apll = s5p_get_pll45xx(xtal, __raw_readl(S5P_APLL_CON), pll_4508);
+ mpll = s5p_get_pll45xx(xtal, __raw_readl(S5P_MPLL_CON), pll_4502);
+ epll = s5p_get_pll45xx(xtal, __raw_readl(S5P_EPLL_CON), pll_4500);
+
+ printk(KERN_INFO "S5P64XX: PLL settings, A=%ld.%ldMHz, M=%ld.%ldMHz," \
+ " E=%ld.%ldMHz\n",
+ print_mhz(apll), print_mhz(mpll), print_mhz(epll));
+
+ fclk = apll / GET_DIV(clkdiv0, S5P_CLKDIV0_APLL);
+
+ mux_stat1 = __raw_readl(S5P_CLK_MUX_STAT1);
+ mux_stat0 = __raw_readl(S5P_CLK_MUX_STAT0);
+
+ switch ((mux_stat1 & S5P_CLK_MUX_STAT1_D0SYNC_MASK) >> \
+ S5P_CLK_MUX_STAT1_D0SYNC_SHIFT) {
+ case 0x1: /* Asynchronous mode */
+ switch ((mux_stat0 & S5P_CLK_MUX_STAT0_MUXD0_MASK) \
+ >> S5P_CLK_MUX_STAT0_MUXD0_SHIFT) {
+ case 0x1: /* MPLL source */
+ hclkd0 = mpll / GET_DIV(clkdiv0, S5P_CLKDIV0_D0CLK);
+ pclkd0 = hclkd0 / GET_DIV(clkdiv0, S5P_CLKDIV0_P0CLK);
+ break;
+ case 0x2: /* A2M source */
+ a2m = apll / GET_DIV(clkdiv0, S5P_CLKDIV0_A2M);
+ hclkd0 = a2m / GET_DIV(clkdiv0, S5P_CLKDIV0_D0CLK);
+ pclkd0 = hclkd0 / GET_DIV(clkdiv0, S5P_CLKDIV0_P0CLK);
+ break;
+ default:
+ break;
+
+ }
+
+ switch ((mux_stat0 & S5P_CLK_MUX_STAT0_MUXD1_MASK) >> \
+ S5P_CLK_MUX_STAT0_MUXD1_SHIFT) {
+ case 0x1: /* MPLL source */
+ hclkd1 = mpll / GET_DIV(clkdiv0, S5P_CLKDIV0_D1CLK);
+ pclkd1 = hclkd0 / GET_DIV(clkdiv0, S5P_CLKDIV0_P1CLK);
+ break;
+ case 0x2: /* A2M source */
+ a2m = apll / GET_DIV(clkdiv0, S5P_CLKDIV0_A2M);
+ hclkd1 = a2m / GET_DIV(clkdiv0, S5P_CLKDIV0_D1CLK);
+ pclkd1 = hclkd0 / GET_DIV(clkdiv0, S5P_CLKDIV0_P1CLK);
+ break;
+ default:
+ break;
+ }
+ break;
+
+ case 0x2: /* Synchronous mode */
+ hclkd0 = fclk / GET_DIV(clkdiv0, S5P_CLKDIV0_D0CLK);
+ pclkd0 = hclkd0 / GET_DIV(clkdiv0, S5P_CLKDIV0_P0CLK);
+ hclkd1 = fclk / GET_DIV(clkdiv0, S5P_CLKDIV0_D1CLK);
+ pclkd1 = hclkd1 / GET_DIV(clkdiv0, S5P_CLKDIV0_P1CLK);
+ break;
+ default:
+ printk(KERN_ERR "failed to get sync/async mode status register\n");
+ break;
+ }
+
+ printk(KERN_INFO "S5P64XX: HCLKD0=%ld.%ldMHz, HCLKD1=%ld.%ldMHz," \
+ " PCLKD0=%ld.%ldMHz, PCLKD1=%ld.%ldMHz\n",
+ print_mhz(hclkd0), print_mhz(hclkd1),
+ print_mhz(pclkd0), print_mhz(pclkd1));
+
+ clk_fout_mpll.rate = mpll;
+ clk_fout_epll.rate = epll;
+ clk_fout_apll.rate = apll;
+
+ clk_f.rate = fclk;
+ clk_pd1.rate = pclkd1;
+
+ /* For backward compatibility */
+ clk_h.rate = hclkd1;
+ clk_p.rate = pclkd1;
+
+ for (ptr = 0; ptr < ARRAY_SIZE(init_parents); ptr++)
+ s3c_set_clksrc(init_parents[ptr], true);
+}
+
+static struct clk init_clocks[] = {
+ {
+ .name = "systimer",
+ .id = -1,
+ .parent = &clk_pd1,
+ .enable = s5p6442_clk_ip3_ctrl,
+ .ctrlbit = (1<<16),
+ }, {
+ .name = "uart",
+ .id = 0,
+ .parent = &clk_pd1,
+ .enable = s5p6442_clk_ip3_ctrl,
+ .ctrlbit = (1<<17),
+ }, {
+ .name = "uart",
+ .id = 1,
+ .parent = &clk_pd1,
+ .enable = s5p6442_clk_ip3_ctrl,
+ .ctrlbit = (1<<18),
+ }, {
+ .name = "uart",
+ .id = 2,
+ .parent = &clk_pd1,
+ .enable = s5p6442_clk_ip3_ctrl,
+ .ctrlbit = (1<<19),
+ }, {
+ .name = "timers",
+ .id = -1,
+ .parent = &clk_pd1,
+ .enable = s5p6442_clk_ip3_ctrl,
+ .ctrlbit = (1<<23),
+ },
+};
+
+static struct clk *clks[] __initdata = {
+ &clk_ext,
+ &clk_epll,
+ &clk_pd1,
+ &clk_mout_epll.clk,
+ &clk_mout_mpll.clk,
+};
+
+void __init s5p6442_register_clocks(void)
+{
+ int ret;
+
+ ret = s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));
+
+ s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks));
+
+ s3c_pwmclk_init();
+}
diff --git a/arch/arm/mach-s5p6442/include/mach/pwm-clock.h b/arch/arm/mach-s5p6442/include/mach/pwm-clock.h
new file mode 100644
index 0000000..081247e
--- /dev/null
+++ b/arch/arm/mach-s5p6442/include/mach/pwm-clock.h
@@ -0,0 +1,69 @@
+/* linux/arch/arm/mach-s5p6442/include/mach/pwm-clock.h
+ *
+ * Copyright 2008 Simtec Electronics
+ * Ben Dooks <ben at simtec.co.uk>
+ * http://armlinux.simtec.co.uk/
+ *
+ * Copyright 2010 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * Based on arch/arm/plat-s3c24xx/include/mach/pwm-clock.h
+ *
+ * S5P6442 - pwm clock and timer support
+ *
+ * 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.
+*/
+
+#ifndef __ASM_ARCH_PWMCLK_H
+#define __ASM_ARCH_PWMCLK_H __FILE__
+
+/**
+ * pwm_cfg_src_is_tclk() - return whether the given mux config is a tclk
+ * @cfg: The timer TCFG1 register bits shifted down to 0.
+ *
+ * Return true if the given configuration from TCFG1 is a TCLK instead
+ * any of the TDIV clocks.
+ */
+static inline int pwm_cfg_src_is_tclk(unsigned long tcfg)
+{
+ return tcfg == S3C2410_TCFG1_MUX_TCLK;
+}
+
+/**
+ * tcfg_to_divisor() - convert tcfg1 setting to a divisor
+ * @tcfg1: The tcfg1 setting, shifted down.
+ *
+ * Get the divisor value for the given tcfg1 setting. We assume the
+ * caller has already checked to see if this is not a TCLK source.
+ */
+static inline unsigned long tcfg_to_divisor(unsigned long tcfg1)
+{
+ return 1 << (1 + tcfg1);
+}
+
+/**
+ * pwm_tdiv_has_div1() - does the tdiv setting have a /1
+ *
+ * Return true if we have a /1 in the tdiv setting.
+ */
+static inline unsigned int pwm_tdiv_has_div1(void)
+{
+ return 0;
+}
+
+/**
+ * pwm_tdiv_div_bits() - calculate TCFG1 divisor value.
+ * @div: The divisor to calculate the bit information for.
+ *
+ * Turn a divisor into the necessary bit field for TCFG1.
+ */
+static inline unsigned long pwm_tdiv_div_bits(unsigned int div)
+{
+ return ilog2(div) - 1;
+}
+
+#define S3C_TCFG1_MUX_TCLK S3C2410_TCFG1_MUX_TCLK
+
+#endif /* __ASM_ARCH_PWMCLK_H */
diff --git a/arch/arm/mach-s5p6442/include/mach/regs-clock.h b/arch/arm/mach-s5p6442/include/mach/regs-clock.h
new file mode 100644
index 0000000..ec4911a
--- /dev/null
+++ b/arch/arm/mach-s5p6442/include/mach/regs-clock.h
@@ -0,0 +1,103 @@
+/* linux/arch/arm/mach-s5p6442/include/mach/regs-clock.h
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * S5P6442 - Clock register definitions
+ *
+ * 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.
+*/
+
+#ifndef __ASM_ARCH_REGS_CLOCK_H
+#define __ASM_ARCH_REGS_CLOCK_H __FILE__
+
+#include <mach/map.h>
+
+#define S5P_CLKREG(x) (S3C_VA_SYS + (x))
+
+#define S5P_APLL_LOCK S5P_CLKREG(0x00)
+#define S5P_MPLL_LOCK S5P_CLKREG(0x08)
+#define S5P_EPLL_LOCK S5P_CLKREG(0x10)
+#define S5P_VPLL_LOCK S5P_CLKREG(0x20)
+
+#define S5P_APLL_CON S5P_CLKREG(0x100)
+#define S5P_MPLL_CON S5P_CLKREG(0x108)
+#define S5P_EPLL_CON S5P_CLKREG(0x110)
+#define S5P_VPLL_CON S5P_CLKREG(0x120)
+
+#define S5P_CLK_SRC0 S5P_CLKREG(0x200)
+#define S5P_CLK_SRC1 S5P_CLKREG(0x204)
+#define S5P_CLK_SRC2 S5P_CLKREG(0x208)
+#define S5P_CLK_SRC3 S5P_CLKREG(0x20C)
+#define S5P_CLK_SRC4 S5P_CLKREG(0x210)
+#define S5P_CLK_SRC5 S5P_CLKREG(0x214)
+#define S5P_CLK_SRC6 S5P_CLKREG(0x218)
+
+#define S5P_CLK_SRC_MASK0 S5P_CLKREG(0x280)
+#define S5P_CLK_SRC_MASK1 S5P_CLKREG(0x284)
+
+#define S5P_CLK_DIV0 S5P_CLKREG(0x300)
+#define S5P_CLK_DIV1 S5P_CLKREG(0x304)
+#define S5P_CLK_DIV2 S5P_CLKREG(0x308)
+#define S5P_CLK_DIV3 S5P_CLKREG(0x30C)
+#define S5P_CLK_DIV4 S5P_CLKREG(0x310)
+#define S5P_CLK_DIV5 S5P_CLKREG(0x314)
+#define S5P_CLK_DIV6 S5P_CLKREG(0x318)
+
+#define S5P_CLKGATE_IP3 S5P_CLKREG(0x46C)
+
+/* CLK_OUT */
+#define S5P_CLK_OUT_SHIFT (12)
+#define S5P_CLK_OUT_MASK (0x1F << S5P_CLK_OUT_SHIFT)
+#define S5P_CLK_OUT S5P_CLKREG(0x500)
+
+#define S5P_CLK_DIV_STAT0 S5P_CLKREG(0x1000)
+#define S5P_CLK_DIV_STAT1 S5P_CLKREG(0x1004)
+
+#define S5P_CLK_MUX_STAT0 S5P_CLKREG(0x1100)
+#define S5P_CLK_MUX_STAT1 S5P_CLKREG(0x1104)
+
+#define S5P_MDNIE_SEL S5P_CLKREG(0x7008)
+
+/* Register Bit definition */
+#define S5P_EPLL_EN (1<<31)
+#define S5P_EPLL_MASK 0xffffffff
+#define S5P_EPLLVAL(_m, _p, _s) ((_m) << 16 | ((_p) << 8) | ((_s)))
+
+/* CLKDIV0 */
+#define S5P_CLKDIV0_APLL_SHIFT (0)
+#define S5P_CLKDIV0_APLL_MASK (0x7 << S5P_CLKDIV0_APLL_SHIFT)
+#define S5P_CLKDIV0_A2M_SHIFT (4)
+#define S5P_CLKDIV0_A2M_MASK (0x7 << S5P_CLKDIV0_A2M_SHIFT)
+#define S5P_CLKDIV0_D0CLK_SHIFT (16)
+#define S5P_CLKDIV0_D0CLK_MASK (0xF << S5P_CLKDIV0_D0CLK_SHIFT)
+#define S5P_CLKDIV0_P0CLK_SHIFT (20)
+#define S5P_CLKDIV0_P0CLK_MASK (0x7 << S5P_CLKDIV0_P0CLK_SHIFT)
+#define S5P_CLKDIV0_D1CLK_SHIFT (24)
+#define S5P_CLKDIV0_D1CLK_MASK (0xF << S5P_CLKDIV0_D1CLK_SHIFT)
+#define S5P_CLKDIV0_P1CLK_SHIFT (28)
+#define S5P_CLKDIV0_P1CLK_MASK (0x7 << S5P_CLKDIV0_P1CLK_SHIFT)
+
+/* Clock MUX status Registers */
+#define S5P_CLK_MUX_STAT0_APLL_SHIFT (0)
+#define S5P_CLK_MUX_STAT0_APLL_MASK (0x7 << S5P_CLK_MUX_STAT0_APLL_SHIFT)
+#define S5P_CLK_MUX_STAT0_MPLL_SHIFT (4)
+#define S5P_CLK_MUX_STAT0_MPLL_MASK (0x7 << S5P_CLK_MUX_STAT0_MPLL_SHIFT)
+#define S5P_CLK_MUX_STAT0_EPLL_SHIFT (8)
+#define S5P_CLK_MUX_STAT0_EPLL_MASK (0x7 << S5P_CLK_MUX_STAT0_EPLL_SHIFT)
+#define S5P_CLK_MUX_STAT0_VPLL_SHIFT (12)
+#define S5P_CLK_MUX_STAT0_VPLL_MASK (0x7 << S5P_CLK_MUX_STAT0_VPLL_SHIFT)
+#define S5P_CLK_MUX_STAT0_MUXARM_SHIFT (16)
+#define S5P_CLK_MUX_STAT0_MUXARM_MASK (0x7 << S5P_CLK_MUX_STAT0_MUXARM_SHIFT)
+#define S5P_CLK_MUX_STAT0_MUXD0_SHIFT (20)
+#define S5P_CLK_MUX_STAT0_MUXD0_MASK (0x7 << S5P_CLK_MUX_STAT0_MUXD0_SHIFT)
+#define S5P_CLK_MUX_STAT0_MUXD1_SHIFT (24)
+#define S5P_CLK_MUX_STAT0_MUXD1_MASK (0x7 << S5P_CLK_MUX_STAT0_MUXD1_SHIFT)
+#define S5P_CLK_MUX_STAT1_D1SYNC_SHIFT (24)
+#define S5P_CLK_MUX_STAT1_D1SYNC_MASK (0x7 << S5P_CLK_MUX_STAT1_D1SYNC_SHIFT)
+#define S5P_CLK_MUX_STAT1_D0SYNC_SHIFT (28)
+#define S5P_CLK_MUX_STAT1_D0SYNC_MASK (0x7 << S5P_CLK_MUX_STAT1_D0SYNC_SHIFT)
+
+#endif /* __ASM_ARCH_REGS_CLOCK_H */
diff --git a/arch/arm/mach-s5p6442/include/mach/tick.h b/arch/arm/mach-s5p6442/include/mach/tick.h
new file mode 100644
index 0000000..2763c08
--- /dev/null
+++ b/arch/arm/mach-s5p6442/include/mach/tick.h
@@ -0,0 +1,26 @@
+/* linux/arch/arm/mach-s5p6442/include/mach/tick.h
+ *
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * Based on arch/arm/mach-s3c6400/include/mach/tick.h
+ *
+ * S5P6442 - Timer tick support definitions
+ *
+ * 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.
+*/
+
+#ifndef __ASM_ARCH_TICK_H
+#define __ASM_ARCH_TICK_H __FILE__
+
+static inline u32 s3c24xx_ostimer_pending(void)
+{
+ u32 pend = __raw_readl(VA_VIC0 + VIC_RAW_STATUS);
+ return pend & (1 << (IRQ_TIMER4_VIC - S5P_IRQ_VIC0(0)));
+}
+
+#define TICK_MAX (0xffffffff)
+
+#endif /* __ASM_ARCH_TICK_H */
--
1.6.2.5
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