[PATCH v5 2/8] ARM: S5P6440: Add Clock and PLL support
Kukjin Kim
kgene.kim at samsung.com
Wed Jan 13 18:50:28 EST 2010
This patch adds clock and pll support for S5P6440. This patch are based on
Harald Welte's patches and Ben's plat-samsung.
Signed-off-by: Thomas Abraham <thomas.ab at samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim at samsung.com>
---
arch/arm/mach-s5p6440/include/mach/regs-clock.h | 130 +++++
arch/arm/plat-s5p/clock.c | 136 +++++
arch/arm/plat-s5p/include/plat/pll.h | 83 +++
arch/arm/plat-s5p/include/plat/s5p-clock.h | 38 ++
arch/arm/plat-s5p/s5p6440-clock.c | 697 +++++++++++++++++++++++
arch/arm/plat-samsung/include/plat/clock.h | 1 +
6 files changed, 1085 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-s5p6440/include/mach/regs-clock.h
create mode 100644 arch/arm/plat-s5p/clock.c
create mode 100644 arch/arm/plat-s5p/include/plat/pll.h
create mode 100644 arch/arm/plat-s5p/include/plat/s5p-clock.h
create mode 100644 arch/arm/plat-s5p/s5p6440-clock.c
diff --git a/arch/arm/mach-s5p6440/include/mach/regs-clock.h b/arch/arm/mach-s5p6440/include/mach/regs-clock.h
new file mode 100644
index 0000000..b7af283
--- /dev/null
+++ b/arch/arm/mach-s5p6440/include/mach/regs-clock.h
@@ -0,0 +1,130 @@
+/* linux/arch/arm/mach-s5p6440/include/mach/regs-clock.h
+ *
+ * Copyright (c) 2009 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * S5P6440 - 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) (S5P_VA_CLK + (x))
+
+#define S5P_APLL_LOCK S5P_CLKREG(0x00)
+#define S5P_MPLL_LOCK S5P_CLKREG(0x04)
+#define S5P_EPLL_LOCK S5P_CLKREG(0x08)
+#define S5P_APLL_CON S5P_CLKREG(0x0C)
+#define S5P_MPLL_CON S5P_CLKREG(0x10)
+#define S5P_EPLL_CON S5P_CLKREG(0x14)
+#define S5P_EPLL_CON_K S5P_CLKREG(0x18)
+#define S5P_CLK_SRC0 S5P_CLKREG(0x1C)
+#define S5P_CLK_DIV0 S5P_CLKREG(0x20)
+#define S5P_CLK_DIV1 S5P_CLKREG(0x24)
+#define S5P_CLK_DIV2 S5P_CLKREG(0x28)
+#define S5P_CLK_OUT S5P_CLKREG(0x2C)
+#define S5P_CLK_GATE_HCLK0 S5P_CLKREG(0x30)
+#define S5P_CLK_GATE_PCLK S5P_CLKREG(0x34)
+#define S5P_CLK_GATE_SCLK0 S5P_CLKREG(0x38)
+#define S5P_CLK_GATE_MEM0 S5P_CLKREG(0x3C)
+#define S5P_CLK_DIV3 S5P_CLKREG(0x40)
+#define S5P_CLK_GATE_HCLK1 S5P_CLKREG(0x44)
+#define S5P_CLK_GATE_SCLK1 S5P_CLKREG(0x48)
+#define S5P_AHB_CON0 S5P_CLKREG(0x100)
+#define S5P_CLK_SRC1 S5P_CLKREG(0x10C)
+#define S5P_SWRESET S5P_CLKREG(0x114)
+#define S5P_SYS_ID S5P_CLKREG(0x118)
+#define S5P_SYS_OTHERS S5P_CLKREG(0x11C)
+#define S5P_MEM_CFG_STAT S5P_CLKREG(0x12C)
+#define S5P_PWR_CFG S5P_CLKREG(0x804)
+#define S5P_EINT_WAKEUP_MASK S5P_CLKREG(0x808)
+#define S5P_NORMAL_CFG S5P_CLKREG(0x810)
+#define S5P_STOP_CFG S5P_CLKREG(0x814)
+#define S5P_SLEEP_CFG S5P_CLKREG(0x818)
+#define S5P_OSC_FREQ S5P_CLKREG(0x820)
+#define S5P_OSC_STABLE S5P_CLKREG(0x824)
+#define S5P_PWR_STABLE S5P_CLKREG(0x828)
+#define S5P_MTC_STABLE S5P_CLKREG(0x830)
+#define S5P_OTHERS S5P_CLKREG(0x900)
+#define S5P_RST_STAT S5P_CLKREG(0x904)
+#define S5P_WAKEUP_STAT S5P_CLKREG(0x908)
+#define S5P_SLPEN S5P_CLKREG(0x930)
+#define S5P_INFORM0 S5P_CLKREG(0xA00)
+#define S5P_INFORM1 S5P_CLKREG(0xA04)
+#define S5P_INFORM2 S5P_CLKREG(0xA08)
+#define S5P_INFORM3 S5P_CLKREG(0xA0C)
+
+/* CLKDIV0 */
+#define S5P_CLKDIV0_PCLK_MASK (0xf << 12)
+#define S5P_CLKDIV0_PCLK_SHIFT (12)
+#define S5P_CLKDIV0_HCLK_MASK (0xf << 8)
+#define S5P_CLKDIV0_HCLK_SHIFT (8)
+#define S5P_CLKDIV0_MPLL_MASK (0x1 << 4)
+#define S5P_CLKDIV0_ARM_MASK (0xf << 0)
+#define S5P_CLKDIV0_ARM_SHIFT (0)
+
+/* CLKDIV3 */
+#define S5P_CLKDIV3_PCLK_LOW_MASK (0xf << 12)
+#define S5P_CLKDIV3_PCLK_LOW_SHIFT (12)
+#define S5P_CLKDIV3_HCLK_LOW_MASK (0xf << 8)
+#define S5P_CLKDIV3_HCLK_LOW_SHIFT (8)
+
+/* HCLK0 GATE Registers */
+#define S5P_CLKCON_HCLK0_USB (1<<20)
+#define S5P_CLKCON_HCLK0_HSMMC2 (1<<19)
+#define S5P_CLKCON_HCLK0_HSMMC1 (1<<18)
+#define S5P_CLKCON_HCLK0_HSMMC0 (1<<17)
+#define S5P_CLKCON_HCLK0_POST0 (1<<5)
+
+/* HCLK1 GATE Registers */
+#define S5P_CLKCON_HCLK1_DISPCON (1<<1)
+
+/* PCLK GATE Registers */
+#define S5P_CLKCON_PCLK_IIS2 (1<<26)
+#define S5P_CLKCON_PCLK_SPI1 (1<<22)
+#define S5P_CLKCON_PCLK_SPI0 (1<<21)
+#define S5P_CLKCON_PCLK_GPIO (1<<18)
+#define S5P_CLKCON_PCLK_IIC0 (1<<17)
+#define S5P_CLKCON_PCLK_TSADC (1<<12)
+#define S5P_CLKCON_PCLK_PWM (1<<7)
+#define S5P_CLKCON_PCLK_RTC (1<<6)
+#define S5P_CLKCON_PCLK_WDT (1<<5)
+#define S5P_CLKCON_PCLK_UART3 (1<<4)
+#define S5P_CLKCON_PCLK_UART2 (1<<3)
+#define S5P_CLKCON_PCLK_UART1 (1<<2)
+#define S5P_CLKCON_PCLK_UART0 (1<<1)
+
+/* SCLK0 GATE Registers */
+#define S5P_CLKCON_SCLK0_MMC2_48 (1<<29)
+#define S5P_CLKCON_SCLK0_MMC1_48 (1<<28)
+#define S5P_CLKCON_SCLK0_MMC0_48 (1<<27)
+#define S5P_CLKCON_SCLK0_MMC2 (1<<26)
+#define S5P_CLKCON_SCLK0_MMC1 (1<<25)
+#define S5P_CLKCON_SCLK0_MMC0 (1<<24)
+#define S5P_CLKCON_SCLK0_SPI1_48 (1<<23)
+#define S5P_CLKCON_SCLK0_SPI0_48 (1<<22)
+#define S5P_CLKCON_SCLK0_SPI1 (1<<21)
+#define S5P_CLKCON_SCLK0_SPI0 (1<<20)
+#define S5P_CLKCON_SCLK0_UART (1<<5)
+
+/* SCLK1 GATE Registers */
+
+/* MEM0 GATE Registers */
+#define S5P_CLKCON_MEM0_HCLK_NFCON (1<<2)
+
+/*OTHERS Resgister */
+#define S5P_OTHERS_USB_SIG_MASK (1<<16)
+#define S5P_OTHERS_HCLK_LOW_SEL_MPLL (1<<6)
+
+/* Compatibility defines */
+#define ARM_CLK_DIV S5P_CLK_DIV0
+#define ARM_DIV_RATIO_SHIFT 0
+#define ARM_DIV_MASK (0xf << ARM_DIV_RATIO_SHIFT)
+
+#endif /* __ASM_ARCH_REGS_CLOCK_H */
diff --git a/arch/arm/plat-s5p/clock.c b/arch/arm/plat-s5p/clock.c
new file mode 100644
index 0000000..3d3c0f1
--- /dev/null
+++ b/arch/arm/plat-s5p/clock.c
@@ -0,0 +1,136 @@
+/* linux/arch/arm/plat-s5p/clock.c
+ *
+ * Copyright 2009 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * S5P - Common 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 <asm/div64.h>
+
+#include <plat/clock.h>
+#include <plat/clock-clksrc.h>
+#include <plat/s5p-clock.h>
+
+/* fin_apll, fin_mpll and fin_epll are all the same clock, which we call
+ * clk_ext_xtal_mux.
+*/
+struct clk clk_ext_xtal_mux = {
+ .name = "ext_xtal",
+ .id = -1,
+};
+
+/* 48MHz USB Phy clock output */
+struct clk clk_48m = {
+ .name = "clk_48m",
+ .id = -1,
+ .rate = 48000000,
+};
+
+/* APLL clock output
+ * No need .ctrlbit, this is always on
+*/
+struct clk clk_fout_apll = {
+ .name = "fout_apll",
+ .id = -1,
+};
+
+/* MPLL clock output
+ * No need .ctrlbit, this is always on
+*/
+struct clk clk_fout_mpll = {
+ .name = "fout_mpll",
+ .id = -1,
+};
+
+/* EPLL clock output */
+struct clk clk_fout_epll = {
+ .name = "fout_epll",
+ .id = -1,
+ .ctrlbit = (1 << 31),
+};
+
+/* ARM clock */
+struct clk clk_arm = {
+ .name = "armclk",
+ .id = -1,
+ .rate = 0,
+ .ctrlbit = 0,
+};
+
+/* Possible clock sources for APLL Mux */
+static struct clk *clk_src_apll_list[] = {
+ [0] = &clk_fin_apll,
+ [1] = &clk_fout_apll,
+};
+
+struct clksrc_sources clk_src_apll = {
+ .sources = clk_src_apll_list,
+ .nr_sources = ARRAY_SIZE(clk_src_apll_list),
+};
+
+/* Possible clock sources for MPLL Mux */
+static struct clk *clk_src_mpll_list[] = {
+ [0] = &clk_fin_mpll,
+ [1] = &clk_fout_mpll,
+};
+
+struct clksrc_sources clk_src_mpll = {
+ .sources = clk_src_mpll_list,
+ .nr_sources = ARRAY_SIZE(clk_src_mpll_list),
+};
+
+/* Possible clock sources for EPLL Mux */
+static struct clk *clk_src_epll_list[] = {
+ [0] = &clk_fin_epll,
+ [1] = &clk_fout_epll,
+};
+
+struct clksrc_sources clk_src_epll = {
+ .sources = clk_src_epll_list,
+ .nr_sources = ARRAY_SIZE(clk_src_epll_list),
+};
+
+int s5p_gatectrl(void __iomem *reg, struct clk *clk, int enable)
+{
+ unsigned int ctrlbit = clk->ctrlbit;
+ u32 con;
+
+ con = __raw_readl(reg);
+ con = enable ? (con | ctrlbit) : (con & ~ctrlbit);
+ __raw_writel(con, reg);
+ return 0;
+}
+
+static struct clk *s5p_clks[] __initdata = {
+ &clk_ext_xtal_mux,
+ &clk_48m,
+ &clk_fout_apll,
+ &clk_fout_mpll,
+ &clk_fout_epll,
+ &clk_arm,
+};
+
+void __init s5p_register_clocks(unsigned long xtal_freq)
+{
+ int ret;
+
+ clk_ext_xtal_mux.rate = xtal_freq;
+
+ ret = s3c24xx_register_clocks(s5p_clks, ARRAY_SIZE(s5p_clks));
+ if (ret > 0)
+ printk(KERN_ERR "Failed to register s5p clocks\n");
+}
diff --git a/arch/arm/plat-s5p/include/plat/pll.h b/arch/arm/plat-s5p/include/plat/pll.h
new file mode 100644
index 0000000..d48325b
--- /dev/null
+++ b/arch/arm/plat-s5p/include/plat/pll.h
@@ -0,0 +1,83 @@
+/* arch/arm/plat-s5p/include/plat/pll.h
+ *
+ * Copyright (c) 2009 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * S5P PLL code
+ *
+ * Based on arch/arm/plat-s3c64xx/include/plat/pll.h
+ *
+ * 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.
+*/
+
+#define PLL45XX_MDIV_MASK (0x3FF)
+#define PLL45XX_PDIV_MASK (0x3F)
+#define PLL45XX_SDIV_MASK (0x7)
+#define PLL45XX_MDIV_SHIFT (16)
+#define PLL45XX_PDIV_SHIFT (8)
+#define PLL45XX_SDIV_SHIFT (0)
+
+#include <asm/div64.h>
+
+enum pll45xx_type_t {
+ pll_4500,
+ pll_4502,
+ pll_4508
+};
+
+static inline unsigned long s5p_get_pll45xx(unsigned long baseclk, u32 pll_con,
+ enum pll45xx_type_t pll_type)
+{
+ u32 mdiv, pdiv, sdiv;
+ u64 fvco = baseclk;
+
+ mdiv = (pll_con >> PLL45XX_MDIV_SHIFT) & PLL45XX_MDIV_MASK;
+ pdiv = (pll_con >> PLL45XX_PDIV_SHIFT) & PLL45XX_PDIV_MASK;
+ sdiv = (pll_con >> PLL45XX_SDIV_SHIFT) & PLL45XX_SDIV_MASK;
+
+ if (pll_type == pll_4508)
+ sdiv = sdiv - 1;
+
+ fvco *= mdiv;
+ do_div(fvco, (pdiv << sdiv));
+
+ return (unsigned long)fvco;
+}
+
+#define PLL90XX_MDIV_MASK (0xFF)
+#define PLL90XX_PDIV_MASK (0x3F)
+#define PLL90XX_SDIV_MASK (0x7)
+#define PLL90XX_KDIV_MASK (0xffff)
+#define PLL90XX_MDIV_SHIFT (16)
+#define PLL90XX_PDIV_SHIFT (8)
+#define PLL90XX_SDIV_SHIFT (0)
+#define PLL90XX_KDIV_SHIFT (0)
+
+static inline unsigned long s5p_get_pll90xx(unsigned long baseclk,
+ u32 pll_con, u32 pll_conk)
+{
+ unsigned long result;
+ u32 mdiv, pdiv, sdiv, kdiv;
+ u64 tmp;
+
+ mdiv = (pll_con >> PLL90XX_MDIV_SHIFT) & PLL90XX_MDIV_MASK;
+ pdiv = (pll_con >> PLL90XX_PDIV_SHIFT) & PLL90XX_PDIV_MASK;
+ sdiv = (pll_con >> PLL90XX_SDIV_SHIFT) & PLL90XX_SDIV_MASK;
+ kdiv = pll_conk & PLL90XX_KDIV_MASK;
+
+ /* We need to multiple baseclk by mdiv (the integer part) and kdiv
+ * which is in 2^16ths, so shift mdiv up (does not overflow) and
+ * add kdiv before multiplying. The use of tmp is to avoid any
+ * overflows before shifting bac down into result when multipling
+ * by the mdiv and kdiv pair.
+ */
+
+ tmp = baseclk;
+ tmp *= (mdiv << 16) + kdiv;
+ do_div(tmp, (pdiv << sdiv));
+ result = tmp >> 16;
+
+ return result;
+}
diff --git a/arch/arm/plat-s5p/include/plat/s5p-clock.h b/arch/arm/plat-s5p/include/plat/s5p-clock.h
new file mode 100644
index 0000000..e1a7444
--- /dev/null
+++ b/arch/arm/plat-s5p/include/plat/s5p-clock.h
@@ -0,0 +1,38 @@
+/* linux/arch/arm/plat-s5p/include/plat/s5p-clock.h
+ *
+ * Copyright 2009 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * Header file for s5p 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.
+*/
+
+#ifndef __ASM_PLAT_S5P_CLOCK_H
+#define __ASM_PLAT_S5P_CLOCK_H __FILE__
+
+#include <linux/clk.h>
+
+#define GET_DIV(clk, field) ((((clk) & field##_MASK) >> field##_SHIFT) + 1)
+
+#define clk_fin_apll clk_ext_xtal_mux
+#define clk_fin_mpll clk_ext_xtal_mux
+#define clk_fin_epll clk_ext_xtal_mux
+
+extern struct clk clk_ext_xtal_mux;
+extern struct clk clk_48m;
+extern struct clk clk_fout_apll;
+extern struct clk clk_fout_mpll;
+extern struct clk clk_fout_epll;
+extern struct clk clk_arm;
+
+extern struct clksrc_sources clk_src_apll;
+extern struct clksrc_sources clk_src_mpll;
+extern struct clksrc_sources clk_src_epll;
+
+extern int s5p6440_clk48m_ctrl(struct clk *clk, int enable);
+extern int s5p_gatectrl(void __iomem *reg, struct clk *clk, int enable);
+
+#endif /* __ASM_PLAT_S5P_CLOCK_H */
diff --git a/arch/arm/plat-s5p/s5p6440-clock.c b/arch/arm/plat-s5p/s5p6440-clock.c
new file mode 100644
index 0000000..4b0c9f4
--- /dev/null
+++ b/arch/arm/plat-s5p/s5p6440-clock.c
@@ -0,0 +1,697 @@
+/* linux/arch/arm/plat-s5p/s5p6440-clock.c
+ *
+ * Copyright (c) 2009 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
+ * S5P6440 - 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/hardware.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/clock-clksrc.h>
+#include <plat/s5p-clock.h>
+#include <plat/pll.h>
+
+/* APLL Mux output clock */
+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 int s5p6440_epll_enable(struct clk *clk, int enable)
+{
+ unsigned int ctrlbit = clk->ctrlbit;
+ unsigned int epll_con = __raw_readl(S5P_EPLL_CON) & ~ctrlbit;
+
+ if (enable)
+ __raw_writel(epll_con | ctrlbit, S5P_EPLL_CON);
+ else
+ __raw_writel(epll_con, S5P_EPLL_CON);
+
+ return 0;
+}
+
+unsigned long s5p6440_epll_get_rate(struct clk *clk)
+{
+ return clk->rate;
+}
+
+static u32 epll_div[][5] = {
+ { 36000000, 0, 48, 1, 4 },
+ { 48000000, 0, 32, 1, 3 },
+ { 60000000, 0, 40, 1, 3 },
+ { 72000000, 0, 48, 1, 3 },
+ { 84000000, 0, 28, 1, 2 },
+ { 96000000, 0, 32, 1, 2 },
+ { 32768000, 45264, 43, 1, 4 },
+ { 45158000, 6903, 30, 1, 3 },
+ { 49152000, 50332, 32, 1, 3 },
+ { 67738000, 10398, 45, 1, 3 },
+ { 73728000, 9961, 49, 1, 3 }
+};
+
+static int s5p6440_epll_set_rate(struct clk *clk, unsigned long rate)
+{
+ unsigned int epll_con, epll_con_k;
+ unsigned int i;
+
+ if (clk->rate == rate) /* Return if nothing changed */
+ return 0;
+
+ epll_con = __raw_readl(S5P_EPLL_CON);
+ epll_con_k = __raw_readl(S5P_EPLL_CON_K);
+
+ epll_con_k &= ~(PLL90XX_KDIV_MASK);
+ epll_con &= ~(PLL90XX_MDIV_MASK | PLL90XX_PDIV_MASK | PLL90XX_SDIV_MASK);
+
+ for (i = 0; i < ARRAY_SIZE(epll_div); i++) {
+ if (epll_div[i][0] == rate) {
+ epll_con_k |= (epll_div[i][1] << PLL90XX_KDIV_SHIFT);
+ epll_con |= (epll_div[i][2] << PLL90XX_MDIV_SHIFT) |
+ (epll_div[i][3] << PLL90XX_PDIV_SHIFT) |
+ (epll_div[i][4] << PLL90XX_SDIV_SHIFT);
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(epll_div)) {
+ printk(KERN_ERR "%s: Invalid Clock EPLL Frequency\n", __func__);
+ return -EINVAL;
+ }
+
+ __raw_writel(epll_con, S5P_EPLL_CON);
+ __raw_writel(epll_con_k, S5P_EPLL_CON_K);
+
+ clk->rate = rate;
+
+ return 0;
+}
+
+static struct clk_ops s5p6440_epll_ops = {
+ .get_rate = s5p6440_epll_get_rate,
+ .set_rate = s5p6440_epll_set_rate,
+};
+
+static struct clksrc_clk clk_mout_epll = {
+ .clk = {
+ .name = "mout_epll",
+ .id = -1,
+ },
+ .sources = &clk_src_epll,
+ .reg_src = { .reg = S5P_CLK_SRC0, .shift = 2, .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 = 1, .size = 1 },
+};
+
+struct clk clk_h_low = {
+ .name = "hclk_low",
+ .id = -1,
+ .rate = 0,
+ .parent = NULL,
+ .ctrlbit = 0,
+ .ops = &clk_ops_def_setrate,
+};
+
+struct clk clk_p_low = {
+ .name = "pclk_low",
+ .id = -1,
+ .rate = 0,
+ .parent = NULL,
+ .ctrlbit = 0,
+ .ops = &clk_ops_def_setrate,
+};
+
+enum perf_level {
+ L0 = 532*1000,
+ L1 = 266*1000,
+ L2 = 133*1000,
+};
+
+static const u32 clock_table[][3] = {
+ /*{ARM_CLK, DIVarm, DIVhclk}*/
+ {L0 * 1000, (0 << ARM_DIV_RATIO_SHIFT), (3 << S5P_CLKDIV0_HCLK_SHIFT)},
+ {L1 * 1000, (1 << ARM_DIV_RATIO_SHIFT), (1 << S5P_CLKDIV0_HCLK_SHIFT)},
+ {L2 * 1000, (3 << ARM_DIV_RATIO_SHIFT), (0 << S5P_CLKDIV0_HCLK_SHIFT)},
+};
+
+static unsigned long s5p6440_armclk_get_rate(struct clk *clk)
+{
+ unsigned long rate = clk_get_rate(clk->parent);
+ u32 clkdiv;
+
+ /* divisor mask starts at bit0, so no need to shift */
+ clkdiv = __raw_readl(ARM_CLK_DIV) & ARM_DIV_MASK;
+
+ return rate / (clkdiv + 1);
+}
+
+static unsigned long s5p6440_armclk_round_rate(struct clk *clk,
+ unsigned long rate)
+{
+ u32 iter;
+
+ for (iter = 1 ; iter < ARRAY_SIZE(clock_table) ; iter++) {
+ if (rate > clock_table[iter][0])
+ return clock_table[iter-1][0];
+ }
+
+ return clock_table[ARRAY_SIZE(clock_table) - 1][0];
+}
+
+static int s5p6440_armclk_set_rate(struct clk *clk, unsigned long rate)
+{
+ u32 round_tmp;
+ u32 iter;
+ u32 clk_div0_tmp;
+ u32 cur_rate = clk->ops->get_rate(clk);
+ unsigned long flags;
+
+ round_tmp = clk->ops->round_rate(clk, rate);
+ if (round_tmp == cur_rate)
+ return 0;
+
+
+ for (iter = 0 ; iter < ARRAY_SIZE(clock_table) ; iter++) {
+ if (round_tmp == clock_table[iter][0])
+ break;
+ }
+
+ if (iter >= ARRAY_SIZE(clock_table))
+ iter = ARRAY_SIZE(clock_table) - 1;
+
+ local_irq_save(flags);
+ if (cur_rate > round_tmp) {
+ /* Frequency Down */
+ clk_div0_tmp = __raw_readl(ARM_CLK_DIV) & ~(ARM_DIV_MASK);
+ clk_div0_tmp |= clock_table[iter][1];
+ __raw_writel(clk_div0_tmp, ARM_CLK_DIV);
+
+ clk_div0_tmp = __raw_readl(ARM_CLK_DIV) &
+ ~(S5P_CLKDIV0_HCLK_MASK);
+ clk_div0_tmp |= clock_table[iter][2];
+ __raw_writel(clk_div0_tmp, ARM_CLK_DIV);
+
+
+ } else {
+ /* Frequency Up */
+ clk_div0_tmp = __raw_readl(ARM_CLK_DIV) &
+ ~(S5P_CLKDIV0_HCLK_MASK);
+ clk_div0_tmp |= clock_table[iter][2];
+ __raw_writel(clk_div0_tmp, ARM_CLK_DIV);
+
+ clk_div0_tmp = __raw_readl(ARM_CLK_DIV) & ~(ARM_DIV_MASK);
+ clk_div0_tmp |= clock_table[iter][1];
+ __raw_writel(clk_div0_tmp, ARM_CLK_DIV);
+ }
+ local_irq_restore(flags);
+
+ clk->rate = clock_table[iter][0];
+
+ return 0;
+}
+
+static struct clk_ops s5p6440_clkarm_ops = {
+ .get_rate = s5p6440_armclk_get_rate,
+ .set_rate = s5p6440_armclk_set_rate,
+ .round_rate = s5p6440_armclk_round_rate,
+};
+
+static unsigned long s5p6440_clk_doutmpll_get_rate(struct clk *clk)
+{
+ unsigned long rate = clk_get_rate(clk->parent);
+
+ if (__raw_readl(S5P_CLK_DIV0) & S5P_CLKDIV0_MPLL_MASK)
+ rate /= 2;
+
+ return rate;
+}
+
+struct clk clk_dout_mpll = {
+ .name = "dout_mpll",
+ .id = -1,
+ .parent = &clk_mout_mpll.clk,
+ .ops = &(struct clk_ops) {
+ .get_rate = s5p6440_clk_doutmpll_get_rate,
+ },
+};
+
+int s5p6440_clk48m_ctrl(struct clk *clk, int enable)
+{
+ unsigned long flags;
+ u32 val;
+
+ /* can't rely on clock lock, this register has other usages */
+ local_irq_save(flags);
+
+ val = __raw_readl(S5P_OTHERS);
+ if (enable)
+ val |= S5P_OTHERS_USB_SIG_MASK;
+ else
+ val &= ~S5P_OTHERS_USB_SIG_MASK;
+
+ __raw_writel(val, S5P_OTHERS);
+
+ local_irq_restore(flags);
+
+ return 0;
+}
+
+static int s5p6440_pclk_ctrl(struct clk *clk, int enable)
+{
+ return s5p_gatectrl(S5P_CLK_GATE_PCLK, clk, enable);
+}
+
+static int s5p6440_hclk0_ctrl(struct clk *clk, int enable)
+{
+ return s5p_gatectrl(S5P_CLK_GATE_HCLK0, clk, enable);
+}
+
+static int s5p6440_hclk1_ctrl(struct clk *clk, int enable)
+{
+ return s5p_gatectrl(S5P_CLK_GATE_HCLK1, clk, enable);
+}
+
+static int s5p6440_sclk_ctrl(struct clk *clk, int enable)
+{
+ return s5p_gatectrl(S5P_CLK_GATE_SCLK0, clk, enable);
+}
+
+static int s5p6440_mem_ctrl(struct clk *clk, int enable)
+{
+ return s5p_gatectrl(S5P_CLK_GATE_MEM0, clk, enable);
+}
+
+/*
+ * The following clocks will be disabled during clock initialization. It is
+ * recommended to keep the following clocks disabled until the driver requests
+ * for enabling the clock.
+ */
+static struct clk init_clocks_disable[] = {
+ {
+ .name = "nand",
+ .id = -1,
+ .parent = &clk_h,
+ .enable = s5p6440_mem_ctrl,
+ .ctrlbit = S5P_CLKCON_MEM0_HCLK_NFCON,
+ }, {
+ .name = "adc",
+ .id = -1,
+ .parent = &clk_p_low,
+ .enable = s5p6440_pclk_ctrl,
+ .ctrlbit = S5P_CLKCON_PCLK_TSADC,
+ }, {
+ .name = "i2c",
+ .id = -1,
+ .parent = &clk_p_low,
+ .enable = s5p6440_pclk_ctrl,
+ .ctrlbit = S5P_CLKCON_PCLK_IIC0,
+ }, {
+ .name = "i2s_v40",
+ .id = 0,
+ .parent = &clk_p_low,
+ .enable = s5p6440_pclk_ctrl,
+ .ctrlbit = S5P_CLKCON_PCLK_IIS2,
+ }, {
+ .name = "spi",
+ .id = 0,
+ .parent = &clk_p_low,
+ .enable = s5p6440_pclk_ctrl,
+ .ctrlbit = S5P_CLKCON_PCLK_SPI0,
+ }, {
+ .name = "spi",
+ .id = 1,
+ .parent = &clk_p_low,
+ .enable = s5p6440_pclk_ctrl,
+ .ctrlbit = S5P_CLKCON_PCLK_SPI1,
+ }, {
+ .name = "sclk_spi_48",
+ .id = 0,
+ .parent = &clk_48m,
+ .enable = s5p6440_sclk_ctrl,
+ .ctrlbit = S5P_CLKCON_SCLK0_SPI0_48,
+ }, {
+ .name = "sclk_spi_48",
+ .id = 1,
+ .parent = &clk_48m,
+ .enable = s5p6440_sclk_ctrl,
+ .ctrlbit = S5P_CLKCON_SCLK0_SPI1_48,
+ }, {
+ .name = "mmc_48m",
+ .id = 0,
+ .parent = &clk_48m,
+ .enable = s5p6440_sclk_ctrl,
+ .ctrlbit = S5P_CLKCON_SCLK0_MMC0_48,
+ }, {
+ .name = "mmc_48m",
+ .id = 1,
+ .parent = &clk_48m,
+ .enable = s5p6440_sclk_ctrl,
+ .ctrlbit = S5P_CLKCON_SCLK0_MMC1_48,
+ }, {
+ .name = "mmc_48m",
+ .id = 2,
+ .parent = &clk_48m,
+ .enable = s5p6440_sclk_ctrl,
+ .ctrlbit = S5P_CLKCON_SCLK0_MMC2_48,
+ }, {
+ .name = "otg",
+ .id = -1,
+ .parent = &clk_h_low,
+ .enable = s5p6440_hclk0_ctrl,
+ .ctrlbit = S5P_CLKCON_HCLK0_USB
+ }, {
+ .name = "post",
+ .id = -1,
+ .parent = &clk_h_low,
+ .enable = s5p6440_hclk0_ctrl,
+ .ctrlbit = S5P_CLKCON_HCLK0_POST0
+ }, {
+ .name = "lcd",
+ .id = -1,
+ .parent = &clk_h_low,
+ .enable = s5p6440_hclk1_ctrl,
+ .ctrlbit = S5P_CLKCON_HCLK1_DISPCON,
+ }, {
+ .name = "hsmmc",
+ .id = 0,
+ .parent = &clk_h_low,
+ .enable = s5p6440_hclk0_ctrl,
+ .ctrlbit = S5P_CLKCON_HCLK0_HSMMC0,
+ }, {
+ .name = "hsmmc",
+ .id = 1,
+ .parent = &clk_h_low,
+ .enable = s5p6440_hclk0_ctrl,
+ .ctrlbit = S5P_CLKCON_HCLK0_HSMMC1,
+ }, {
+ .name = "hsmmc",
+ .id = 2,
+ .parent = &clk_h_low,
+ .enable = s5p6440_hclk0_ctrl,
+ .ctrlbit = S5P_CLKCON_HCLK0_HSMMC2,
+ }, {
+ .name = "rtc",
+ .id = -1,
+ .parent = &clk_p_low,
+ .enable = s5p6440_pclk_ctrl,
+ .ctrlbit = S5P_CLKCON_PCLK_RTC,
+ }, {
+ .name = "watchdog",
+ .id = -1,
+ .parent = &clk_p_low,
+ .enable = s5p6440_pclk_ctrl,
+ .ctrlbit = S5P_CLKCON_PCLK_WDT,
+ }, {
+ .name = "timers",
+ .id = -1,
+ .parent = &clk_p_low,
+ .enable = s5p6440_pclk_ctrl,
+ .ctrlbit = S5P_CLKCON_PCLK_PWM,
+ }
+};
+
+/*
+ * The following clocks will be enabled during clock initialization.
+ */
+static struct clk init_clocks[] = {
+ {
+ .name = "gpio",
+ .id = -1,
+ .parent = &clk_p_low,
+ .enable = s5p6440_pclk_ctrl,
+ .ctrlbit = S5P_CLKCON_PCLK_GPIO,
+ }, {
+ .name = "uart",
+ .id = 0,
+ .parent = &clk_p_low,
+ .enable = s5p6440_pclk_ctrl,
+ .ctrlbit = S5P_CLKCON_PCLK_UART0,
+ }, {
+ .name = "uart",
+ .id = 1,
+ .parent = &clk_p_low,
+ .enable = s5p6440_pclk_ctrl,
+ .ctrlbit = S5P_CLKCON_PCLK_UART1,
+ }, {
+ .name = "uart",
+ .id = 2,
+ .parent = &clk_p_low,
+ .enable = s5p6440_pclk_ctrl,
+ .ctrlbit = S5P_CLKCON_PCLK_UART2,
+ }, {
+ .name = "uart",
+ .id = 3,
+ .parent = &clk_p_low,
+ .enable = s5p6440_pclk_ctrl,
+ .ctrlbit = S5P_CLKCON_PCLK_UART3,
+ }
+};
+
+static struct clk clk_iis_cd_v40 = {
+ .name = "iis_cdclk_v40",
+ .id = -1,
+};
+
+static struct clk clk_pcm_cd = {
+ .name = "pcm_cdclk",
+ .id = -1,
+};
+
+static struct clk *clkset_spi_mmc_list[] = {
+ &clk_mout_epll.clk,
+ &clk_dout_mpll,
+ &clk_fin_epll,
+};
+
+static struct clksrc_sources clkset_spi_mmc = {
+ .sources = clkset_spi_mmc_list,
+ .nr_sources = ARRAY_SIZE(clkset_spi_mmc_list),
+};
+
+static struct clk *clkset_uart_list[] = {
+ &clk_mout_epll.clk,
+ &clk_dout_mpll
+};
+
+static struct clksrc_sources clkset_uart = {
+ .sources = clkset_uart_list,
+ .nr_sources = ARRAY_SIZE(clkset_uart_list),
+};
+
+static struct clksrc_clk clksrcs[] = {
+ {
+ .clk = {
+ .name = "mmc_bus",
+ .id = 0,
+ .ctrlbit = S5P_CLKCON_SCLK0_MMC0,
+ .enable = s5p6440_sclk_ctrl,
+ },
+ .sources = &clkset_spi_mmc,
+ .reg_src = { .reg = S5P_CLK_SRC0, .shift = 18, .size = 2 },
+ .reg_div = { .reg = S5P_CLK_DIV1, .shift = 0, .size = 4 },
+ }, {
+ .clk = {
+ .name = "mmc_bus",
+ .id = 1,
+ .ctrlbit = S5P_CLKCON_SCLK0_MMC1,
+ .enable = s5p6440_sclk_ctrl,
+ },
+ .sources = &clkset_spi_mmc,
+ .reg_src = { .reg = S5P_CLK_SRC0, .shift = 20, .size = 2 },
+ .reg_div = { .reg = S5P_CLK_DIV1, .shift = 4, .size = 4 },
+ }, {
+ .clk = {
+ .name = "mmc_bus",
+ .id = 2,
+ .ctrlbit = S5P_CLKCON_SCLK0_MMC2,
+ .enable = s5p6440_sclk_ctrl,
+ },
+ .sources = &clkset_spi_mmc,
+ .reg_src = { .reg = S5P_CLK_SRC0, .shift = 22, .size = 2 },
+ .reg_div = { .reg = S5P_CLK_DIV1, .shift = 8, .size = 4 },
+ }, {
+ .clk = {
+ .name = "uclk1",
+ .id = -1,
+ .ctrlbit = S5P_CLKCON_SCLK0_UART,
+ .enable = s5p6440_sclk_ctrl,
+ },
+ .sources = &clkset_uart,
+ .reg_src = { .reg = S5P_CLK_SRC0, .shift = 13, .size = 1 },
+ .reg_div = { .reg = S5P_CLK_DIV2, .shift = 16, .size = 4 },
+ }, {
+ .clk = {
+ .name = "spi_epll",
+ .id = 0,
+ .ctrlbit = S5P_CLKCON_SCLK0_SPI0,
+ .enable = s5p6440_sclk_ctrl,
+ },
+ .sources = &clkset_spi_mmc,
+ .reg_src = { .reg = S5P_CLK_SRC0, .shift = 14, .size = 2 },
+ .reg_div = { .reg = S5P_CLK_DIV2, .shift = 0, .size = 4 },
+ }, {
+ .clk = {
+ .name = "spi_epll",
+ .id = 1,
+ .ctrlbit = S5P_CLKCON_SCLK0_SPI1,
+ .enable = s5p6440_sclk_ctrl,
+ },
+ .sources = &clkset_spi_mmc,
+ .reg_src = { .reg = S5P_CLK_SRC0, .shift = 16, .size = 2 },
+ .reg_div = { .reg = S5P_CLK_DIV2, .shift = 4, .size = 4 },
+ }
+};
+
+/* Clock initialisation code */
+static struct clksrc_clk *init_parents[] = {
+ &clk_mout_apll,
+ &clk_mout_epll,
+ &clk_mout_mpll,
+};
+
+void __init_or_cpufreq s5p6440_setup_clocks(void)
+{
+ struct clk *xtal_clk;
+ unsigned long xtal;
+ unsigned long fclk;
+ unsigned long hclk;
+ unsigned long hclk_low;
+ unsigned long pclk;
+ unsigned long pclk_low;
+ unsigned long epll;
+ unsigned long apll;
+ unsigned long mpll;
+ unsigned int ptr;
+ u32 clkdiv0;
+ u32 clkdiv3;
+
+ /* Set S5P6440 functions for clk_fout_epll */
+ clk_fout_epll.enable = s5p6440_epll_enable;
+ clk_fout_epll.ops = &s5p6440_epll_ops;
+
+ /* Set S5P6440 functions for arm clock */
+ clk_arm.parent = &clk_mout_apll.clk;
+ clk_arm.ops = &s5p6440_clkarm_ops;
+ clk_48m.enable = s5p6440_clk48m_ctrl;
+
+ clkdiv0 = __raw_readl(S5P_CLK_DIV0);
+ clkdiv3 = __raw_readl(S5P_CLK_DIV3);
+
+ xtal_clk = clk_get(NULL, "ext_xtal");
+ BUG_ON(IS_ERR(xtal_clk));
+
+ xtal = clk_get_rate(xtal_clk);
+ clk_put(xtal_clk);
+
+ epll = s5p_get_pll90xx(xtal, __raw_readl(S5P_EPLL_CON),
+ __raw_readl(S5P_EPLL_CON_K));
+ mpll = s5p_get_pll45xx(xtal, __raw_readl(S5P_MPLL_CON), pll_4502);
+ apll = s5p_get_pll45xx(xtal, __raw_readl(S5P_APLL_CON), pll_4502);
+
+ printk(KERN_INFO "S5P6440: 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_ARM);
+ hclk = fclk / GET_DIV(clkdiv0, S5P_CLKDIV0_HCLK);
+ pclk = hclk / GET_DIV(clkdiv0, S5P_CLKDIV0_PCLK);
+
+ if (__raw_readl(S5P_OTHERS) & S5P_OTHERS_HCLK_LOW_SEL_MPLL) {
+ /* Asynchronous mode */
+ hclk_low = mpll / GET_DIV(clkdiv3, S5P_CLKDIV3_HCLK_LOW);
+ } else {
+ /* Synchronous mode */
+ hclk_low = apll / GET_DIV(clkdiv3, S5P_CLKDIV3_HCLK_LOW);
+ }
+
+ pclk_low = hclk_low / GET_DIV(clkdiv3, S5P_CLKDIV3_PCLK_LOW);
+
+ printk(KERN_INFO "S5P6440: HCLK=%ld.%ldMHz, HCLK_LOW=%ld.%ldMHz," \
+ " PCLK=%ld.%ldMHz, PCLK_LOW=%ld.%ldMHz\n",
+ print_mhz(hclk), print_mhz(hclk_low),
+ print_mhz(pclk), print_mhz(pclk_low));
+
+ clk_fout_mpll.rate = mpll;
+ clk_fout_epll.rate = epll;
+ clk_fout_apll.rate = apll;
+
+ clk_f.rate = fclk;
+ clk_h.rate = hclk;
+ clk_p.rate = pclk;
+ clk_h_low.rate = hclk_low;
+ clk_p_low.rate = pclk_low;
+
+ for (ptr = 0; ptr < ARRAY_SIZE(init_parents); ptr++)
+ s3c_set_clksrc(init_parents[ptr], true);
+
+ for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++)
+ s3c_set_clksrc(&clksrcs[ptr], true);
+}
+
+static struct clk *clks[] __initdata = {
+ &clk_ext,
+ &clk_mout_epll.clk,
+ &clk_mout_mpll.clk,
+ &clk_dout_mpll,
+ &clk_iis_cd_v40,
+ &clk_pcm_cd,
+ &clk_p_low,
+ &clk_h_low,
+};
+
+void __init s5p6440_register_clocks(void)
+{
+ struct clk *clkp;
+ int ret;
+ int ptr;
+
+ ret = s3c24xx_register_clocks(clks, ARRAY_SIZE(clks));
+ if (ret > 0)
+ printk(KERN_ERR "Failed to register %u clocks\n", ret);
+
+ s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs));
+ s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks));
+
+ clkp = init_clocks_disable;
+ for (ptr = 0; ptr < ARRAY_SIZE(init_clocks_disable); ptr++, clkp++) {
+
+ ret = s3c24xx_register_clock(clkp);
+ if (ret < 0) {
+ printk(KERN_ERR "Failed to register clock %s (%d)\n",
+ clkp->name, ret);
+ }
+ (clkp->enable)(clkp, 0);
+ }
+
+ s3c_pwmclk_init();
+}
diff --git a/arch/arm/plat-samsung/include/plat/clock.h b/arch/arm/plat-samsung/include/plat/clock.h
index 22e0114..ba9a1cd 100644
--- a/arch/arm/plat-samsung/include/plat/clock.h
+++ b/arch/arm/plat-samsung/include/plat/clock.h
@@ -95,6 +95,7 @@ extern void s3c_register_clocks(struct clk *clk, int nr_clks);
extern int s3c24xx_register_baseclocks(unsigned long xtal);
extern void s3c64xx_register_clocks(void);
+extern void s5p_register_clocks(unsigned long xtal_freq);
extern void s3c24xx_setup_clocks(unsigned long fclk,
unsigned long hclk,
--
1.6.2.5
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