ARM: S5P6442: Add clock support for S5P6442

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@samsung.com>
Signed-off-by: Atul Dahiya <atul.dahiya@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

3 files changed, 198 insertions, 0 deletions

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 000000000000..15e8525da0f1
--- /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@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 000000000000..d8360b5d4ece
--- /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 000000000000..e1d4cabf8297
--- /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 */