[ARM] 3142/1: OMAP 2/5: Update files common to omap1 and omap2

Patch from Tony Lindgren

This patch syncs the mainline kernel with linux-omap tree.
The highlights of the patch are:

- Serial port and framebuffer init improvments by Imre Deak

- Common omap pin mux framework by Tony Lindgren

- Common omap clock framework by Tony Lindren

Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

14 files changed, 1583 insertions, 1739 deletions

diff --git a/arch/arm/plat-omap/Makefile b/arch/arm/plat-omap/Makefile
index 7e144f9cad1..9ccf1943fc9 100644
--- a/arch/arm/plat-omap/Makefile
+++ b/arch/arm/plat-omap/Makefile
@@ -3,7 +3,7 @@
 #
 
 # Common support
-obj-y := common.o sram.o sram-fn.o clock.o dma.o mux.o gpio.o mcbsp.o usb.o
+obj-y := common.o sram.o sram-fn.o clock.o devices.o dma.o mux.o gpio.o mcbsp.o usb.o
 obj-m :=
 obj-n :=
 obj-  :=
diff --git a/arch/arm/plat-omap/clock.c b/arch/arm/plat-omap/clock.c
index a020fe16428..7ce39b986e2 100644
--- a/arch/arm/plat-omap/clock.c
+++ b/arch/arm/plat-omap/clock.c
@@ -1,15 +1,20 @@
 /*
  *  linux/arch/arm/plat-omap/clock.c
  *
- *  Copyright (C) 2004 Nokia corporation
+ *  Copyright (C) 2004 - 2005 Nokia corporation
  *  Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
  *
+ *  Modified for omap shared clock framework by Tony Lindgren <tony@atomide.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.
  */
-#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/config.h>
 #include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
 #include <linux/list.h>
 #include <linux/errno.h>
 #include <linux/err.h>
@@ -18,562 +23,20 @@
 #include <asm/io.h>
 #include <asm/semaphore.h>
 #include <asm/hardware/clock.h>
-#include <asm/arch/board.h>
-#include <asm/arch/usb.h>
 
-#include "clock.h"
-#include "sram.h"
+#include <asm/arch/clock.h>
 
-static LIST_HEAD(clocks);
+LIST_HEAD(clocks);
 static DECLARE_MUTEX(clocks_sem);
-static DEFINE_SPINLOCK(clockfw_lock);
-static void propagate_rate(struct clk *  clk);
-/* UART clock function */
-static int set_uart_rate(struct clk * clk, unsigned long rate);
-/* External clock (MCLK & BCLK) functions */
-static int set_ext_clk_rate(struct clk *  clk, unsigned long rate);
-static long round_ext_clk_rate(struct clk *  clk, unsigned long rate);
-static void init_ext_clk(struct clk *  clk);
-/* MPU virtual clock functions */
-static int select_table_rate(struct clk *  clk, unsigned long rate);
-static long round_to_table_rate(struct clk *  clk, unsigned long rate);
-void clk_setdpll(__u16, __u16);
-
-static struct mpu_rate rate_table[] = {
-	/* MPU MHz, xtal MHz, dpll1 MHz, CKCTL, DPLL_CTL
-	 * armdiv, dspdiv, dspmmu, tcdiv, perdiv, lcddiv
-	 */
-#if defined(CONFIG_OMAP_ARM_216MHZ)
-	{ 216000000, 12000000, 216000000, 0x050d, 0x2910 }, /* 1/1/2/2/2/8 */
-#endif
-#if defined(CONFIG_OMAP_ARM_195MHZ)
-	{ 195000000, 13000000, 195000000, 0x050e, 0x2790 }, /* 1/1/2/2/4/8 */
-#endif
-#if defined(CONFIG_OMAP_ARM_192MHZ)
-	{ 192000000, 19200000, 192000000, 0x050f, 0x2510 }, /* 1/1/2/2/8/8 */
-	{ 192000000, 12000000, 192000000, 0x050f, 0x2810 }, /* 1/1/2/2/8/8 */
-	{  96000000, 12000000, 192000000, 0x055f, 0x2810 }, /* 2/2/2/2/8/8 */
-	{  48000000, 12000000, 192000000, 0x0baf, 0x2810 }, /* 4/8/4/4/8/8 */
-	{  24000000, 12000000, 192000000, 0x0fff, 0x2810 }, /* 8/8/8/8/8/8 */
-#endif
-#if defined(CONFIG_OMAP_ARM_182MHZ)
-	{ 182000000, 13000000, 182000000, 0x050e, 0x2710 }, /* 1/1/2/2/4/8 */
-#endif
-#if defined(CONFIG_OMAP_ARM_168MHZ)
-	{ 168000000, 12000000, 168000000, 0x010f, 0x2710 }, /* 1/1/1/2/8/8 */
-#endif
-#if defined(CONFIG_OMAP_ARM_150MHZ)
-	{ 150000000, 12000000, 150000000, 0x010a, 0x2cb0 }, /* 1/1/1/2/4/4 */
-#endif
-#if defined(CONFIG_OMAP_ARM_120MHZ)
-	{ 120000000, 12000000, 120000000, 0x010a, 0x2510 }, /* 1/1/1/2/4/4 */
-#endif
-#if defined(CONFIG_OMAP_ARM_96MHZ)
-	{  96000000, 12000000,  96000000, 0x0005, 0x2410 }, /* 1/1/1/1/2/2 */
-#endif
-#if defined(CONFIG_OMAP_ARM_60MHZ)
-	{  60000000, 12000000,  60000000, 0x0005, 0x2290 }, /* 1/1/1/1/2/2 */
-#endif
-#if defined(CONFIG_OMAP_ARM_30MHZ)
-	{  30000000, 12000000,  60000000, 0x0555, 0x2290 }, /* 2/2/2/2/2/2 */
-#endif
-	{ 0, 0, 0, 0, 0 },
-};
-
-
-static void ckctl_recalc(struct clk *  clk);
-int __clk_enable(struct clk *clk);
-void __clk_disable(struct clk *clk);
-void __clk_unuse(struct clk *clk);
-int __clk_use(struct clk *clk);
-
-
-static void followparent_recalc(struct clk *  clk)
-{
-	clk->rate = clk->parent->rate;
-}
-
-
-static void watchdog_recalc(struct clk *  clk)
-{
-	clk->rate = clk->parent->rate / 14;
-}
-
-static void uart_recalc(struct clk * clk)
-{
-	unsigned int val = omap_readl(clk->enable_reg);
-	if (val & clk->enable_bit)
-		clk->rate = 48000000;
-	else
-		clk->rate = 12000000;
-}
-
-static struct clk ck_ref = {
-	.name		= "ck_ref",
-	.rate		= 12000000,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-			  ALWAYS_ENABLED,
-};
-
-static struct clk ck_dpll1 = {
-	.name		= "ck_dpll1",
-	.parent		= &ck_ref,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-			  RATE_PROPAGATES | ALWAYS_ENABLED,
-};
-
-static struct clk ck_dpll1out = {
-	.name		= "ck_dpll1out",
-	.parent		= &ck_dpll1,
-	.flags		= CLOCK_IN_OMAP16XX,
-	.enable_reg	= ARM_IDLECT2,
-	.enable_bit	= EN_CKOUT_ARM,
-	.recalc		= &followparent_recalc,
-};
-
-static struct clk arm_ck = {
-	.name		= "arm_ck",
-	.parent		= &ck_dpll1,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-			  RATE_CKCTL | RATE_PROPAGATES | ALWAYS_ENABLED,
-	.rate_offset	= CKCTL_ARMDIV_OFFSET,
-	.recalc		= &ckctl_recalc,
-};
-
-static struct clk armper_ck = {
-	.name		= "armper_ck",
-	.parent		= &ck_dpll1,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-			  RATE_CKCTL,
-	.enable_reg	= ARM_IDLECT2,
-	.enable_bit	= EN_PERCK,
-	.rate_offset	= CKCTL_PERDIV_OFFSET,
-	.recalc		= &ckctl_recalc,
-};
-
-static struct clk arm_gpio_ck = {
-	.name		= "arm_gpio_ck",
-	.parent		= &ck_dpll1,
-	.flags		= CLOCK_IN_OMAP1510,
-	.enable_reg	= ARM_IDLECT2,
-	.enable_bit	= EN_GPIOCK,
-	.recalc		= &followparent_recalc,
-};
-
-static struct clk armxor_ck = {
-	.name		= "armxor_ck",
-	.parent		= &ck_ref,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX,
-	.enable_reg	= ARM_IDLECT2,
-	.enable_bit	= EN_XORPCK,
-	.recalc		= &followparent_recalc,
-};
-
-static struct clk armtim_ck = {
-	.name		= "armtim_ck",
-	.parent		= &ck_ref,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX,
-	.enable_reg	= ARM_IDLECT2,
-	.enable_bit	= EN_TIMCK,
-	.recalc		= &followparent_recalc,
-};
-
-static struct clk armwdt_ck = {
-	.name		= "armwdt_ck",
-	.parent		= &ck_ref,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX,
-	.enable_reg	= ARM_IDLECT2,
-	.enable_bit	= EN_WDTCK,
-	.recalc		= &watchdog_recalc,
-};
-
-static struct clk arminth_ck16xx = {
-	.name		= "arminth_ck",
-	.parent		= &arm_ck,
-	.flags		= CLOCK_IN_OMAP16XX | ALWAYS_ENABLED,
-	.recalc		= &followparent_recalc,
-	/* Note: On 16xx the frequency can be divided by 2 by programming
-	 * ARM_CKCTL:ARM_INTHCK_SEL(14) to 1
-	 *
-	 * 1510 version is in TC clocks.
-	 */
-};
-
-static struct clk dsp_ck = {
-	.name		= "dsp_ck",
-	.parent		= &ck_dpll1,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-			  RATE_CKCTL,
-	.enable_reg	= ARM_CKCTL,
-	.enable_bit	= EN_DSPCK,
-	.rate_offset	= CKCTL_DSPDIV_OFFSET,
-	.recalc		= &ckctl_recalc,
-};
-
-static struct clk dspmmu_ck = {
-	.name		= "dspmmu_ck",
-	.parent		= &ck_dpll1,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-			  RATE_CKCTL | ALWAYS_ENABLED,
-	.rate_offset	= CKCTL_DSPMMUDIV_OFFSET,
-	.recalc		= &ckctl_recalc,
-};
-
-static struct clk dspper_ck = {
-	.name		= "dspper_ck",
-	.parent		= &ck_dpll1,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-			  RATE_CKCTL | DSP_DOMAIN_CLOCK | VIRTUAL_IO_ADDRESS,
-	.enable_reg	= DSP_IDLECT2,
-	.enable_bit	= EN_PERCK,
-	.rate_offset	= CKCTL_PERDIV_OFFSET,
-	.recalc		= &followparent_recalc,
-	//.recalc		= &ckctl_recalc,
-};
-
-static struct clk dspxor_ck = {
-	.name		= "dspxor_ck",
-	.parent		= &ck_ref,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-			  DSP_DOMAIN_CLOCK | VIRTUAL_IO_ADDRESS,
-	.enable_reg	= DSP_IDLECT2,
-	.enable_bit	= EN_XORPCK,
-	.recalc		= &followparent_recalc,
-};
-
-static struct clk dsptim_ck = {
-	.name		= "dsptim_ck",
-	.parent		= &ck_ref,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-			  DSP_DOMAIN_CLOCK | VIRTUAL_IO_ADDRESS,
-	.enable_reg	= DSP_IDLECT2,
-	.enable_bit	= EN_DSPTIMCK,
-	.recalc		= &followparent_recalc,
-};
-
-static struct clk tc_ck = {
-	.name		= "tc_ck",
-	.parent		= &ck_dpll1,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP730 |
-			  RATE_CKCTL | RATE_PROPAGATES | ALWAYS_ENABLED,
-	.rate_offset	= CKCTL_TCDIV_OFFSET,
-	.recalc		= &ckctl_recalc,
-};
-
-static struct clk arminth_ck1510 = {
-	.name		= "arminth_ck",
-	.parent		= &tc_ck,
-	.flags		= CLOCK_IN_OMAP1510 | ALWAYS_ENABLED,
-	.recalc		= &followparent_recalc,
-	/* Note: On 1510 the frequency follows TC_CK
-	 *
-	 * 16xx version is in MPU clocks.
-	 */
-};
-
-static struct clk tipb_ck = {
-	.name		= "tibp_ck",
-	.parent		= &tc_ck,
-	.flags		= CLOCK_IN_OMAP1510 | ALWAYS_ENABLED,
-	.recalc		= &followparent_recalc,
-};
-
-static struct clk l3_ocpi_ck = {
-	.name		= "l3_ocpi_ck",
-	.parent		= &tc_ck,
-	.flags		= CLOCK_IN_OMAP16XX,
-	.enable_reg	= ARM_IDLECT3,
-	.enable_bit	= EN_OCPI_CK,
-	.recalc		= &followparent_recalc,
-};
+DEFINE_SPINLOCK(clockfw_lock);
 
-static struct clk tc1_ck = {
-	.name		= "tc1_ck",
-	.parent		= &tc_ck,
-	.flags		= CLOCK_IN_OMAP16XX,
-	.enable_reg	= ARM_IDLECT3,
-	.enable_bit	= EN_TC1_CK,
-	.recalc		= &followparent_recalc,
-};
+static struct clk_functions *arch_clock;
 
-static struct clk tc2_ck = {
-	.name		= "tc2_ck",
-	.parent		= &tc_ck,
-	.flags		= CLOCK_IN_OMAP16XX,
-	.enable_reg	= ARM_IDLECT3,
-	.enable_bit	= EN_TC2_CK,
-	.recalc		= &followparent_recalc,
-};
+/*-------------------------------------------------------------------------
+ * Standard clock functions defined in asm/hardware/clock.h
+ *-------------------------------------------------------------------------*/
 
-static struct clk dma_ck = {
-	.name		= "dma_ck",
-	.parent		= &tc_ck,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-			  ALWAYS_ENABLED,
-	.recalc		= &followparent_recalc,
-};
-
-static struct clk dma_lcdfree_ck = {
-	.name		= "dma_lcdfree_ck",
-	.parent		= &tc_ck,
-	.flags		= CLOCK_IN_OMAP16XX | ALWAYS_ENABLED,
-	.recalc		= &followparent_recalc,
-};
-
-static struct clk api_ck = {
-	.name		= "api_ck",
-	.parent		= &tc_ck,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX,
-	.enable_reg	= ARM_IDLECT2,
-	.enable_bit	= EN_APICK,
-	.recalc		= &followparent_recalc,
-};
-
-static struct clk lb_ck = {
-	.name		= "lb_ck",
-	.parent		= &tc_ck,
-	.flags		= CLOCK_IN_OMAP1510,
-	.enable_reg	= ARM_IDLECT2,
-	.enable_bit	= EN_LBCK,
-	.recalc		= &followparent_recalc,
-};
-
-static struct clk rhea1_ck = {
-	.name		= "rhea1_ck",
-	.parent		= &tc_ck,
-	.flags		= CLOCK_IN_OMAP16XX | ALWAYS_ENABLED,
-	.recalc		= &followparent_recalc,
-};
-
-static struct clk rhea2_ck = {
-	.name		= "rhea2_ck",
-	.parent		= &tc_ck,
-	.flags		= CLOCK_IN_OMAP16XX | ALWAYS_ENABLED,
-	.recalc		= &followparent_recalc,
-};
-
-static struct clk lcd_ck = {
-	.name		= "lcd_ck",
-	.parent		= &ck_dpll1,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | CLOCK_IN_OMAP730 |
-			  RATE_CKCTL,
-	.enable_reg	= ARM_IDLECT2,
-	.enable_bit	= EN_LCDCK,
-	.rate_offset	= CKCTL_LCDDIV_OFFSET,
-	.recalc		= &ckctl_recalc,
-};
-
-static struct clk uart1_1510 = {
-	.name		= "uart1_ck",
-	/* Direct from ULPD, no parent */
-	.rate		= 12000000,
-	.flags		= CLOCK_IN_OMAP1510 | ENABLE_REG_32BIT | ALWAYS_ENABLED,
-	.enable_reg	= MOD_CONF_CTRL_0,
-	.enable_bit	= 29,	/* Chooses between 12MHz and 48MHz */
-	.set_rate	= &set_uart_rate,
-	.recalc		= &uart_recalc,
-};
-
-static struct clk uart1_16xx = {
-	.name		= "uart1_ck",
-	/* Direct from ULPD, no parent */
-	.rate		= 48000000,
-	.flags		= CLOCK_IN_OMAP16XX | RATE_FIXED | ENABLE_REG_32BIT,
-	.enable_reg	= MOD_CONF_CTRL_0,
-	.enable_bit	= 29,
-};
-
-static struct clk uart2_ck = {
-	.name		= "uart2_ck",
-	/* Direct from ULPD, no parent */
-	.rate		= 12000000,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX | ENABLE_REG_32BIT |
-			  ALWAYS_ENABLED,
-	.enable_reg	= MOD_CONF_CTRL_0,
-	.enable_bit	= 30,	/* Chooses between 12MHz and 48MHz */
-	.set_rate	= &set_uart_rate,
-	.recalc		= &uart_recalc,
-};
-
-static struct clk uart3_1510 = {
-	.name		= "uart3_ck",
-	/* Direct from ULPD, no parent */
-	.rate		= 12000000,
-	.flags		= CLOCK_IN_OMAP1510 | ENABLE_REG_32BIT | ALWAYS_ENABLED,
-	.enable_reg	= MOD_CONF_CTRL_0,
-	.enable_bit	= 31,	/* Chooses between 12MHz and 48MHz */
-	.set_rate	= &set_uart_rate,
-	.recalc		= &uart_recalc,
-};
-
-static struct clk uart3_16xx = {
-	.name		= "uart3_ck",
-	/* Direct from ULPD, no parent */
-	.rate		= 48000000,
-	.flags		= CLOCK_IN_OMAP16XX | RATE_FIXED | ENABLE_REG_32BIT,
-	.enable_reg	= MOD_CONF_CTRL_0,
-	.enable_bit	= 31,
-};
-
-static struct clk usb_clko = {	/* 6 MHz output on W4_USB_CLKO */
-	.name		= "usb_clko",
-	/* Direct from ULPD, no parent */
-	.rate		= 6000000,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-			  RATE_FIXED | ENABLE_REG_32BIT,
-	.enable_reg	= ULPD_CLOCK_CTRL,
-	.enable_bit	= USB_MCLK_EN_BIT,
-};
-
-static struct clk usb_hhc_ck1510 = {
-	.name		= "usb_hhc_ck",
-	/* Direct from ULPD, no parent */
-	.rate		= 48000000, /* Actually 2 clocks, 12MHz and 48MHz */
-	.flags		= CLOCK_IN_OMAP1510 |
-			  RATE_FIXED | ENABLE_REG_32BIT,
-	.enable_reg	= MOD_CONF_CTRL_0,
-	.enable_bit	= USB_HOST_HHC_UHOST_EN,
-};
-
-static struct clk usb_hhc_ck16xx = {
-	.name		= "usb_hhc_ck",
-	/* Direct from ULPD, no parent */
-	.rate		= 48000000,
-	/* OTG_SYSCON_2.OTG_PADEN == 0 (not 1510-compatible) */
-	.flags		= CLOCK_IN_OMAP16XX |
-			  RATE_FIXED | ENABLE_REG_32BIT,
-	.enable_reg	= OTG_BASE + 0x08 /* OTG_SYSCON_2 */,
-	.enable_bit	= 8 /* UHOST_EN */,
-};
-
-static struct clk usb_dc_ck = {
-	.name		= "usb_dc_ck",
-	/* Direct from ULPD, no parent */
-	.rate		= 48000000,
-	.flags		= CLOCK_IN_OMAP16XX | RATE_FIXED,
-	.enable_reg	= SOFT_REQ_REG,
-	.enable_bit	= 4,
-};
-
-static struct clk mclk_1510 = {
-	.name		= "mclk",
-	/* Direct from ULPD, no parent. May be enabled by ext hardware. */
-	.rate		= 12000000,
-	.flags		= CLOCK_IN_OMAP1510 | RATE_FIXED,
-};
-
-static struct clk mclk_16xx = {
-	.name		= "mclk",
-	/* Direct from ULPD, no parent. May be enabled by ext hardware. */
-	.flags		= CLOCK_IN_OMAP16XX,
-	.enable_reg	= COM_CLK_DIV_CTRL_SEL,
-	.enable_bit	= COM_ULPD_PLL_CLK_REQ,
-	.set_rate	= &set_ext_clk_rate,
-	.round_rate	= &round_ext_clk_rate,
-	.init		= &init_ext_clk,
-};
-
-static struct clk bclk_1510 = {
-	.name		= "bclk",
-	/* Direct from ULPD, no parent. May be enabled by ext hardware. */
-	.rate		= 12000000,
-	.flags		= CLOCK_IN_OMAP1510 | RATE_FIXED,
-};
-
-static struct clk bclk_16xx = {
-	.name		= "bclk",
-	/* Direct from ULPD, no parent. May be enabled by ext hardware. */
-	.flags		= CLOCK_IN_OMAP16XX,
-	.enable_reg	= SWD_CLK_DIV_CTRL_SEL,
-	.enable_bit	= SWD_ULPD_PLL_CLK_REQ,
-	.set_rate	= &set_ext_clk_rate,
-	.round_rate	= &round_ext_clk_rate,
-	.init		= &init_ext_clk,
-};
-
-static struct clk mmc1_ck = {
-	.name		= "mmc1_ck",
-	/* Functional clock is direct from ULPD, interface clock is ARMPER */
-	.parent		= &armper_ck,
-	.rate		= 48000000,
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-			  RATE_FIXED | ENABLE_REG_32BIT,
-	.enable_reg	= MOD_CONF_CTRL_0,
-	.enable_bit	= 23,
-};
-
-static struct clk mmc2_ck = {
-	.name		= "mmc2_ck",
-	/* Functional clock is direct from ULPD, interface clock is ARMPER */
-	.parent		= &armper_ck,
-	.rate		= 48000000,
-	.flags		= CLOCK_IN_OMAP16XX |
-			  RATE_FIXED | ENABLE_REG_32BIT,
-	.enable_reg	= MOD_CONF_CTRL_0,
-	.enable_bit	= 20,
-};
-
-static struct clk virtual_ck_mpu = {
-	.name		= "mpu",
-	.flags		= CLOCK_IN_OMAP1510 | CLOCK_IN_OMAP16XX |
-			  VIRTUAL_CLOCK | ALWAYS_ENABLED,
-	.parent		= &arm_ck, /* Is smarter alias for */
-	.recalc		= &followparent_recalc,
-	.set_rate	= &select_table_rate,
-	.round_rate	= &round_to_table_rate,
-};
-
-
-static struct clk *  onchip_clks[] = {
-	/* non-ULPD clocks */
-	&ck_ref,
-	&ck_dpll1,
-	/* CK_GEN1 clocks */
-	&ck_dpll1out,
-	&arm_ck,
-	&armper_ck,
-	&arm_gpio_ck,
-	&armxor_ck,
-	&armtim_ck,
-	&armwdt_ck,
-	&arminth_ck1510,  &arminth_ck16xx,
-	/* CK_GEN2 clocks */
-	&dsp_ck,
-	&dspmmu_ck,
-	&dspper_ck,
-	&dspxor_ck,
-	&dsptim_ck,
-	/* CK_GEN3 clocks */
-	&tc_ck,
-	&tipb_ck,
-	&l3_ocpi_ck,
-	&tc1_ck,
-	&tc2_ck,
-	&dma_ck,
-	&dma_lcdfree_ck,
-	&api_ck,
-	&lb_ck,
-	&rhea1_ck,
-	&rhea2_ck,
-	&lcd_ck,
-	/* ULPD clocks */
-	&uart1_1510,
-	&uart1_16xx,
-	&uart2_ck,
-	&uart3_1510,
-	&uart3_16xx,
-	&usb_clko,
-	&usb_hhc_ck1510, &usb_hhc_ck16xx,
-	&usb_dc_ck,
-	&mclk_1510,  &mclk_16xx,
-	&bclk_1510,  &bclk_16xx,
-	&mmc1_ck,
-	&mmc2_ck,
-	/* Virtual clocks */
-	&virtual_ck_mpu,
-};
-
-struct clk *clk_get(struct device *dev, const char *id)
+struct clk * clk_get(struct device *dev, const char *id)
 {
 	struct clk *p, *clk = ERR_PTR(-ENOENT);
 
@@ -590,534 +53,200 @@ struct clk *clk_get(struct device *dev, const char *id)
 }
 EXPORT_SYMBOL(clk_get);
 
-
-void clk_put(struct clk *clk)
-{
-	if (clk && !IS_ERR(clk))
-		module_put(clk->owner);
-}
-EXPORT_SYMBOL(clk_put);
-
-
-int __clk_enable(struct clk *clk)
-{
-	__u16 regval16;
-	__u32 regval32;
-
-	if (clk->flags & ALWAYS_ENABLED)
-		return 0;
-
-	if (unlikely(clk->enable_reg == 0)) {
-		printk(KERN_ERR "clock.c: Enable for %s without enable code\n",
-		       clk->name);
-		return 0;
-	}
-
-	if (clk->flags & DSP_DOMAIN_CLOCK) {
-		__clk_use(&api_ck);
-	}
-
-	if (clk->flags & ENABLE_REG_32BIT) {
-		if (clk->flags & VIRTUAL_IO_ADDRESS) {
-			regval32 = __raw_readl(clk->enable_reg);
-			regval32 |= (1 << clk->enable_bit);
-			__raw_writel(regval32, clk->enable_reg);
-		} else {
-			regval32 = omap_readl(clk->enable_reg);
-			regval32 |= (1 << clk->enable_bit);
-			omap_writel(regval32, clk->enable_reg);
-		}
-	} else {
-		if (clk->flags & VIRTUAL_IO_ADDRESS) {
-			regval16 = __raw_readw(clk->enable_reg);
-			regval16 |= (1 << clk->enable_bit);
-			__raw_writew(regval16, clk->enable_reg);
-		} else {
-			regval16 = omap_readw(clk->enable_reg);
-			regval16 |= (1 << clk->enable_bit);
-			omap_writew(regval16, clk->enable_reg);
-		}
-	}
-
-	if (clk->flags & DSP_DOMAIN_CLOCK) {
-		__clk_unuse(&api_ck);
-	}
-
-	return 0;
-}
-
-
-void __clk_disable(struct clk *clk)
-{
-	__u16 regval16;
-	__u32 regval32;
-
-	if (clk->enable_reg == 0)
-		return;
-
-	if (clk->flags & DSP_DOMAIN_CLOCK) {
-		__clk_use(&api_ck);
-	}
-
-	if (clk->flags & ENABLE_REG_32BIT) {
-		if (clk->flags & VIRTUAL_IO_ADDRESS) {
-			regval32 = __raw_readl(clk->enable_reg);
-			regval32 &= ~(1 << clk->enable_bit);
-			__raw_writel(regval32, clk->enable_reg);
-		} else {
-			regval32 = omap_readl(clk->enable_reg);
-			regval32 &= ~(1 << clk->enable_bit);
-			omap_writel(regval32, clk->enable_reg);
-		}
-	} else {
-		if (clk->flags & VIRTUAL_IO_ADDRESS) {
-			regval16 = __raw_readw(clk->enable_reg);
-			regval16 &= ~(1 << clk->enable_bit);
-			__raw_writew(regval16, clk->enable_reg);
-		} else {
-			regval16 = omap_readw(clk->enable_reg);
-			regval16 &= ~(1 << clk->enable_bit);
-			omap_writew(regval16, clk->enable_reg);
-		}
-	}
-
-	if (clk->flags & DSP_DOMAIN_CLOCK) {
-		__clk_unuse(&api_ck);
-	}
-}
-
-
-void __clk_unuse(struct clk *clk)
-{
-	if (clk->usecount > 0 && !(--clk->usecount)) {
-		__clk_disable(clk);
-		if (likely(clk->parent))
-			__clk_unuse(clk->parent);
-	}
-}
-
-
-int __clk_use(struct clk *clk)
-{
-	int ret = 0;
-	if (clk->usecount++ == 0) {
-		if (likely(clk->parent))
-			ret = __clk_use(clk->parent);
-
-		if (unlikely(ret != 0)) {
-			clk->usecount--;
-			return ret;
-		}
-
-		ret = __clk_enable(clk);
-
-		if (unlikely(ret != 0) && clk->parent) {
-			__clk_unuse(clk->parent);
-			clk->usecount--;
-		}
-	}
-
-	return ret;
-}
-
-
 int clk_enable(struct clk *clk)
 {
 	unsigned long flags;
-	int ret;
+	int ret = 0;
 
 	spin_lock_irqsave(&clockfw_lock, flags);
-	ret = __clk_enable(clk);
+	if (clk->enable)
+		ret = clk->enable(clk);
+	else if (arch_clock->clk_enable)
+		ret = arch_clock->clk_enable(clk);
+	else
+		printk(KERN_ERR "Could not enable clock %s\n", clk->name);
 	spin_unlock_irqrestore(&clockfw_lock, flags);
+
 	return ret;
 }
 EXPORT_SYMBOL(clk_enable);
 
-
 void clk_disable(struct clk *clk)
 {
 	unsigned long flags;
 
 	spin_lock_irqsave(&clockfw_lock, flags);
-	__clk_disable(clk);
+	if (clk->disable)
+		clk->disable(clk);
+	else if (arch_clock->clk_disable)
+		arch_clock->clk_disable(clk);
+	else
+		printk(KERN_ERR "Could not disable clock %s\n", clk->name);
 	spin_unlock_irqrestore(&clockfw_lock, flags);
 }
 EXPORT_SYMBOL(clk_disable);
 
-
 int clk_use(struct clk *clk)
 {
 	unsigned long flags;
 	int ret = 0;
 
 	spin_lock_irqsave(&clockfw_lock, flags);
-	ret = __clk_use(clk);
+	if (arch_clock->clk_use)
+		ret = arch_clock->clk_use(clk);
 	spin_unlock_irqrestore(&clockfw_lock, flags);
+
 	return ret;
 }
 EXPORT_SYMBOL(clk_use);
 
-
 void clk_unuse(struct clk *clk)
 {
 	unsigned long flags;
 
 	spin_lock_irqsave(&clockfw_lock, flags);
-	__clk_unuse(clk);
+	if (arch_clock->clk_unuse)
+		arch_clock->clk_unuse(clk);
 	spin_unlock_irqrestore(&clockfw_lock, flags);
 }
 EXPORT_SYMBOL(clk_unuse);
 
-
 int clk_get_usecount(struct clk *clk)
 {
-        return clk->usecount;
-}
-EXPORT_SYMBOL(clk_get_usecount);
-
-
-unsigned long clk_get_rate(struct clk *clk)
-{
-	return clk->rate;
-}
-EXPORT_SYMBOL(clk_get_rate);
-
-
-static __u16 verify_ckctl_value(__u16 newval)
-{
-	/* This function checks for following limitations set
-	 * by the hardware (all conditions must be true):
-	 * DSPMMU_CK == DSP_CK  or  DSPMMU_CK == DSP_CK/2
-	 * ARM_CK >= TC_CK
-	 * DSP_CK >= TC_CK
-	 * DSPMMU_CK >= TC_CK
-	 *
-	 * In addition following rules are enforced:
-	 * LCD_CK <= TC_CK
-	 * ARMPER_CK <= TC_CK
-	 *
-	 * However, maximum frequencies are not checked for!
-	 */
-	__u8 per_exp;
-	__u8 lcd_exp;
-	__u8 arm_exp;
-	__u8 dsp_exp;
-	__u8 tc_exp;
-	__u8 dspmmu_exp;
-
-	per_exp = (newval >> CKCTL_PERDIV_OFFSET) & 3;
-	lcd_exp = (newval >> CKCTL_LCDDIV_OFFSET) & 3;
-	arm_exp = (newval >> CKCTL_ARMDIV_OFFSET) & 3;
-	dsp_exp = (newval >> CKCTL_DSPDIV_OFFSET) & 3;
-	tc_exp = (newval >> CKCTL_TCDIV_OFFSET) & 3;
-	dspmmu_exp = (newval >> CKCTL_DSPMMUDIV_OFFSET) & 3;
-
-	if (dspmmu_exp < dsp_exp)
-		dspmmu_exp = dsp_exp;
-	if (dspmmu_exp > dsp_exp+1)
-		dspmmu_exp = dsp_exp+1;
-	if (tc_exp < arm_exp)
-		tc_exp = arm_exp;
-	if (tc_exp < dspmmu_exp)
-		tc_exp = dspmmu_exp;
-	if (tc_exp > lcd_exp)
-		lcd_exp = tc_exp;
-	if (tc_exp > per_exp)
-		per_exp = tc_exp;
+	unsigned long flags;
+	int ret = 0;
 
-	newval &= 0xf000;
-	newval |= per_exp << CKCTL_PERDIV_OFFSET;
-	newval |= lcd_exp << CKCTL_LCDDIV_OFFSET;
-	newval |= arm_exp << CKCTL_ARMDIV_OFFSET;
-	newval |= dsp_exp << CKCTL_DSPDIV_OFFSET;
-	newval |= tc_exp << CKCTL_TCDIV_OFFSET;
-	newval |= dspmmu_exp << CKCTL_DSPMMUDIV_OFFSET;
+	spin_lock_irqsave(&clockfw_lock, flags);
+	ret = clk->usecount;
+	spin_unlock_irqrestore(&clockfw_lock, flags);
 
-	return newval;
+	return ret;
 }
+EXPORT_SYMBOL(clk_get_usecount);
 
-
-static int calc_dsor_exp(struct clk *clk, unsigned long rate)
+unsigned long clk_get_rate(struct clk *clk)
 {
-	/* Note: If target frequency is too low, this function will return 4,
-	 * which is invalid value. Caller must check for this value and act
-	 * accordingly.
-	 *
-	 * Note: This function does not check for following limitations set
-	 * by the hardware (all conditions must be true):
-	 * DSPMMU_CK == DSP_CK  or  DSPMMU_CK == DSP_CK/2
-	 * ARM_CK >= TC_CK
-	 * DSP_CK >= TC_CK
-	 * DSPMMU_CK >= TC_CK
-	 */
-	unsigned long realrate;
-	struct clk *  parent;
-	unsigned  dsor_exp;
-
-	if (unlikely(!(clk->flags & RATE_CKCTL)))
-		return -EINVAL;
-
-	parent = clk->parent;
-	if (unlikely(parent == 0))
-		return -EIO;
-
-	realrate = parent->rate;
-	for (dsor_exp=0; dsor_exp<4; dsor_exp++) {
-		if (realrate <= rate)
-			break;
+	unsigned long flags;
+	unsigned long ret = 0;
 
-		realrate /= 2;
-	}
+	spin_lock_irqsave(&clockfw_lock, flags);
+	ret = clk->rate;
+	spin_unlock_irqrestore(&clockfw_lock, flags);
 
-	return dsor_exp;
+	return ret;
 }
+EXPORT_SYMBOL(clk_get_rate);
 
-
-static void ckctl_recalc(struct clk *  clk)
+void clk_put(struct clk *clk)
 {
-	int dsor;
-
-	/* Calculate divisor encoded as 2-bit exponent */
-	if (clk->flags & DSP_DOMAIN_CLOCK) {
-		/* The clock control bits are in DSP domain,
-		 * so api_ck is needed for access.
-		 * Note that DSP_CKCTL virt addr = phys addr, so
-		 * we must use __raw_readw() instead of omap_readw().
-		 */
-		__clk_use(&api_ck);
-		dsor = 1 << (3 & (__raw_readw(DSP_CKCTL) >> clk->rate_offset));
-		__clk_unuse(&api_ck);
-	} else {
-		dsor = 1 << (3 & (omap_readw(ARM_CKCTL) >> clk->rate_offset));
-	}
-	if (unlikely(clk->rate == clk->parent->rate / dsor))
-		return; /* No change, quick exit */
-	clk->rate = clk->parent->rate / dsor;
-
-	if (unlikely(clk->flags & RATE_PROPAGATES))
-		propagate_rate(clk);
+	if (clk && !IS_ERR(clk))
+		module_put(clk->owner);
 }
+EXPORT_SYMBOL(clk_put);
 
+/*-------------------------------------------------------------------------
+ * Optional clock functions defined in asm/hardware/clock.h
+ *-------------------------------------------------------------------------*/
 
 long clk_round_rate(struct clk *clk, unsigned long rate)
 {
-	int dsor_exp;
-
-	if (clk->flags & RATE_FIXED)
-		return clk->rate;
-
-	if (clk->flags & RATE_CKCTL) {
-		dsor_exp = calc_dsor_exp(clk, rate);
-		if (dsor_exp < 0)
-			return dsor_exp;
-		if (dsor_exp > 3)
-			dsor_exp = 3;
-		return clk->parent->rate / (1 << dsor_exp);
-	}
+	unsigned long flags;
+	long ret = 0;
 
-	if(clk->round_rate != 0)
-		return clk->round_rate(clk, rate);
+	spin_lock_irqsave(&clockfw_lock, flags);
+	if (arch_clock->clk_round_rate)
+		ret = arch_clock->clk_round_rate(clk, rate);
+	spin_unlock_irqrestore(&clockfw_lock, flags);
 
-	return clk->rate;
+	return ret;
 }
 EXPORT_SYMBOL(clk_round_rate);
 
-
-static void propagate_rate(struct clk *  clk)
-{
-	struct clk **  clkp;
-
-	for (clkp = onchip_clks; clkp < onchip_clks+ARRAY_SIZE(onchip_clks); clkp++) {
-		if (likely((*clkp)->parent != clk)) continue;
-		if (likely((*clkp)->recalc))
-			(*clkp)->recalc(*clkp);
-	}
-}
-
-
-static int select_table_rate(struct clk *  clk, unsigned long rate)
+int clk_set_rate(struct clk *clk, unsigned long rate)
 {
-	/* Find the highest supported frequency <= rate and switch to it */
-	struct mpu_rate *  ptr;
-
-	if (clk != &virtual_ck_mpu)
-		return -EINVAL;
-
-	for (ptr = rate_table; ptr->rate; ptr++) {
-		if (ptr->xtal != ck_ref.rate)
-			continue;
-
-		/* DPLL1 cannot be reprogrammed without risking system crash */
-		if (likely(ck_dpll1.rate!=0) && ptr->pll_rate != ck_dpll1.rate)
-			continue;
-
-		/* Can check only after xtal frequency check */
-		if (ptr->rate <= rate)
-			break;
-	}
-
-	if (!ptr->rate)
-		return -EINVAL;
+	unsigned long flags;
+	int ret = 0;
 
-	/*
-	 * In most cases we should not need to reprogram DPLL.
-	 * Reprogramming the DPLL is tricky, it must be done from SRAM.
-	 */
-	omap_sram_reprogram_clock(ptr->dpllctl_val, ptr->ckctl_val);
+	spin_lock_irqsave(&clockfw_lock, flags);
+	if (arch_clock->clk_set_rate)
+		ret = arch_clock->clk_set_rate(clk, rate);
+	spin_unlock_irqrestore(&clockfw_lock, flags);
 
-	ck_dpll1.rate = ptr->pll_rate;
-	propagate_rate(&ck_dpll1);
-	return 0;
+	return ret;
 }
+EXPORT_SYMBOL(clk_set_rate);
 
-
-static long round_to_table_rate(struct clk *  clk, unsigned long rate)
+int clk_set_parent(struct clk *clk, struct clk *parent)
 {
-	/* Find the highest supported frequency <= rate */
-	struct mpu_rate *  ptr;
-	long  highest_rate;
-
-	if (clk != &virtual_ck_mpu)
-		return -EINVAL;
-
-	highest_rate = -EINVAL;
-
-	for (ptr = rate_table; ptr->rate; ptr++) {
-		if (ptr->xtal != ck_ref.rate)
-			continue;
-
-		highest_rate = ptr->rate;
+	unsigned long flags;
+	int ret = 0;