arch/arm/cpu/armv7/am33xx/clock.c - filogic/uboot - Gitiles

 /*
  * clock.c
  *
  * clocks for AM33XX based boards
  *
  * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of
  * the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE.  See the
  * GNU General Public License for more details.
  */

 #include <common.h>
 #include <asm/arch/cpu.h>
 #include <asm/arch/clock.h>
 #include <asm/arch/hardware.h>
 #include <asm/io.h>

 #define PRCM_MOD_EN		0x2
 #define PRCM_FORCE_WAKEUP	0x2
 #define PRCM_FUNCTL		0x0

 #define PRCM_EMIF_CLK_ACTIVITY	BIT(2)
 #define PRCM_L3_GCLK_ACTIVITY	BIT(4)

 #define PLL_BYPASS_MODE		0x4
 #define ST_MN_BYPASS		0x00000100
 #define ST_DPLL_CLK		0x00000001
 #define CLK_SEL_MASK		0x7ffff
 #define CLK_DIV_MASK		0x1f
 #define CLK_DIV2_MASK		0x7f
 #define CLK_SEL_SHIFT		0x8
 #define CLK_MODE_SEL		0x7
 #define CLK_MODE_MASK		0xfffffff8
 #define CLK_DIV_SEL		0xFFFFFFE0
 #define CPGMAC0_IDLE		0x30000

 const struct cm_perpll *cmper = (struct cm_perpll *)CM_PER;
 const struct cm_wkuppll *cmwkup = (struct cm_wkuppll *)CM_WKUP;
 const struct cm_dpll *cmdpll = (struct cm_dpll *)CM_DPLL;

 static void enable_interface_clocks(void)
 {
 	/* Enable all the Interconnect Modules */
 	writel(PRCM_MOD_EN, &cmper->l3clkctrl);
 	while (readl(&cmper->l3clkctrl) != PRCM_MOD_EN)
 		;

 	writel(PRCM_MOD_EN, &cmper->l4lsclkctrl);
 	while (readl(&cmper->l4lsclkctrl) != PRCM_MOD_EN)
 		;

 	writel(PRCM_MOD_EN, &cmper->l4fwclkctrl);
 	while (readl(&cmper->l4fwclkctrl) != PRCM_MOD_EN)
 		;

 	writel(PRCM_MOD_EN, &cmwkup->wkl4wkclkctrl);
 	while (readl(&cmwkup->wkl4wkclkctrl) != PRCM_MOD_EN)
 		;

 	writel(PRCM_MOD_EN, &cmper->l3instrclkctrl);
 	while (readl(&cmper->l3instrclkctrl) != PRCM_MOD_EN)
 		;

 	writel(PRCM_MOD_EN, &cmper->l4hsclkctrl);
 	while (readl(&cmper->l4hsclkctrl) != PRCM_MOD_EN)
 		;

 	writel(PRCM_MOD_EN, &cmwkup->wkgpio0clkctrl);
 	while (readl(&cmwkup->wkgpio0clkctrl) != PRCM_MOD_EN)
 		;
 }

 /*
  * Force power domain wake up transition
  * Ensure that the corresponding interface clock is active before
  * using the peripheral
  */
 static void power_domain_wkup_transition(void)
 {
 	writel(PRCM_FORCE_WAKEUP, &cmper->l3clkstctrl);
 	writel(PRCM_FORCE_WAKEUP, &cmper->l4lsclkstctrl);
 	writel(PRCM_FORCE_WAKEUP, &cmwkup->wkclkstctrl);
 	writel(PRCM_FORCE_WAKEUP, &cmper->l4fwclkstctrl);
 	writel(PRCM_FORCE_WAKEUP, &cmper->l3sclkstctrl);
 }

 /*
  * Enable the peripheral clock for required peripherals
  */
 static void enable_per_clocks(void)
 {
 	/* Enable the control module though RBL would have done it*/
 	writel(PRCM_MOD_EN, &cmwkup->wkctrlclkctrl);
 	while (readl(&cmwkup->wkctrlclkctrl) != PRCM_MOD_EN)
 		;

 	/* Enable the module clock */
 	writel(PRCM_MOD_EN, &cmper->timer2clkctrl);
 	while (readl(&cmper->timer2clkctrl) != PRCM_MOD_EN)
 		;

 	/* Select the Master osc 24 MHZ as Timer2 clock source */
 	writel(0x1, &cmdpll->clktimer2clk);

 	/* UART0 */
 	writel(PRCM_MOD_EN, &cmwkup->wkup_uart0ctrl);
 	while (readl(&cmwkup->wkup_uart0ctrl) != PRCM_MOD_EN)
 		;

 	/* MMC0*/
 	writel(PRCM_MOD_EN, &cmper->mmc0clkctrl);
 	while (readl(&cmper->mmc0clkctrl) != PRCM_MOD_EN)
 		;

 	/* i2c0 */
 	writel(PRCM_MOD_EN, &cmwkup->wkup_i2c0ctrl);
 	while (readl(&cmwkup->wkup_i2c0ctrl) != PRCM_MOD_EN)
 		;

 	/* gpio1 module */
 	writel(PRCM_MOD_EN, &cmper->gpio1clkctrl);
 	while (readl(&cmper->gpio1clkctrl) != PRCM_MOD_EN)
 		;

 	/* gpio2 module */
 	writel(PRCM_MOD_EN, &cmper->gpio2clkctrl);
 	while (readl(&cmper->gpio2clkctrl) != PRCM_MOD_EN)
 		;

 	/* gpio3 module */
 	writel(PRCM_MOD_EN, &cmper->gpio3clkctrl);
 	while (readl(&cmper->gpio3clkctrl) != PRCM_MOD_EN)
 		;

 	/* i2c1 */
 	writel(PRCM_MOD_EN, &cmper->i2c1clkctrl);
 	while (readl(&cmper->i2c1clkctrl) != PRCM_MOD_EN)
 		;

 	/* Ethernet */
 	writel(PRCM_MOD_EN, &cmper->cpgmac0clkctrl);
 	while ((readl(&cmper->cpgmac0clkctrl) & CPGMAC0_IDLE) != PRCM_FUNCTL)
 		;

 	/* spi0 */
 	writel(PRCM_MOD_EN, &cmper->spi0clkctrl);
 	while (readl(&cmper->spi0clkctrl) != PRCM_MOD_EN)
 		;
 }

 static void mpu_pll_config(void)
 {
 	u32 clkmode, clksel, div_m2;

 	clkmode = readl(&cmwkup->clkmoddpllmpu);
 	clksel = readl(&cmwkup->clkseldpllmpu);
 	div_m2 = readl(&cmwkup->divm2dpllmpu);

 	/* Set the PLL to bypass Mode */
 	writel(PLL_BYPASS_MODE, &cmwkup->clkmoddpllmpu);
 	while (readl(&cmwkup->idlestdpllmpu) != ST_MN_BYPASS)
 		;

 	clksel = clksel & (~CLK_SEL_MASK);
 	clksel = clksel | ((MPUPLL_M << CLK_SEL_SHIFT) | MPUPLL_N);
 	writel(clksel, &cmwkup->clkseldpllmpu);

 	div_m2 = div_m2 & ~CLK_DIV_MASK;
 	div_m2 = div_m2 | MPUPLL_M2;
 	writel(div_m2, &cmwkup->divm2dpllmpu);

 	clkmode = clkmode | CLK_MODE_SEL;
 	writel(clkmode, &cmwkup->clkmoddpllmpu);

 	while (readl(&cmwkup->idlestdpllmpu) != ST_DPLL_CLK)
 		;
 }

 static void core_pll_config(void)
 {
 	u32 clkmode, clksel, div_m4, div_m5, div_m6;

 	clkmode = readl(&cmwkup->clkmoddpllcore);
 	clksel = readl(&cmwkup->clkseldpllcore);
 	div_m4 = readl(&cmwkup->divm4dpllcore);
 	div_m5 = readl(&cmwkup->divm5dpllcore);
 	div_m6 = readl(&cmwkup->divm6dpllcore);

 	/* Set the PLL to bypass Mode */
 	writel(PLL_BYPASS_MODE, &cmwkup->clkmoddpllcore);

 	while (readl(&cmwkup->idlestdpllcore) != ST_MN_BYPASS)
 		;

 	clksel = clksel & (~CLK_SEL_MASK);
 	clksel = clksel | ((COREPLL_M << CLK_SEL_SHIFT) | COREPLL_N);
 	writel(clksel, &cmwkup->clkseldpllcore);

 	div_m4 = div_m4 & ~CLK_DIV_MASK;
 	div_m4 = div_m4 | COREPLL_M4;
 	writel(div_m4, &cmwkup->divm4dpllcore);

 	div_m5 = div_m5 & ~CLK_DIV_MASK;
 	div_m5 = div_m5 | COREPLL_M5;
 	writel(div_m5, &cmwkup->divm5dpllcore);

 	div_m6 = div_m6 & ~CLK_DIV_MASK;
 	div_m6 = div_m6 | COREPLL_M6;
 	writel(div_m6, &cmwkup->divm6dpllcore);

 	clkmode = clkmode | CLK_MODE_SEL;
 	writel(clkmode, &cmwkup->clkmoddpllcore);

 	while (readl(&cmwkup->idlestdpllcore) != ST_DPLL_CLK)
 		;
 }

 static void per_pll_config(void)
 {
 	u32 clkmode, clksel, div_m2;

 	clkmode = readl(&cmwkup->clkmoddpllper);
 	clksel = readl(&cmwkup->clkseldpllper);
 	div_m2 = readl(&cmwkup->divm2dpllper);

 	/* Set the PLL to bypass Mode */
 	writel(PLL_BYPASS_MODE, &cmwkup->clkmoddpllper);

 	while (readl(&cmwkup->idlestdpllper) != ST_MN_BYPASS)
 		;

 	clksel = clksel & (~CLK_SEL_MASK);
 	clksel = clksel | ((PERPLL_M << CLK_SEL_SHIFT) | PERPLL_N);
 	writel(clksel, &cmwkup->clkseldpllper);

 	div_m2 = div_m2 & ~CLK_DIV2_MASK;
 	div_m2 = div_m2 | PERPLL_M2;
 	writel(div_m2, &cmwkup->divm2dpllper);

 	clkmode = clkmode | CLK_MODE_SEL;
 	writel(clkmode, &cmwkup->clkmoddpllper);

 	while (readl(&cmwkup->idlestdpllper) != ST_DPLL_CLK)
 		;
 }

 void ddr_pll_config(unsigned int ddrpll_m)
 {
 	u32 clkmode, clksel, div_m2;

 	clkmode = readl(&cmwkup->clkmoddpllddr);
 	clksel = readl(&cmwkup->clkseldpllddr);
 	div_m2 = readl(&cmwkup->divm2dpllddr);

 	/* Set the PLL to bypass Mode */
 	clkmode = (clkmode & CLK_MODE_MASK) | PLL_BYPASS_MODE;
 	writel(clkmode, &cmwkup->clkmoddpllddr);

 	/* Wait till bypass mode is enabled */
 	while ((readl(&cmwkup->idlestdpllddr) & ST_MN_BYPASS)
 				!= ST_MN_BYPASS)
 		;

 	clksel = clksel & (~CLK_SEL_MASK);
 	clksel = clksel | ((ddrpll_m << CLK_SEL_SHIFT) | DDRPLL_N);
 	writel(clksel, &cmwkup->clkseldpllddr);

 	div_m2 = div_m2 & CLK_DIV_SEL;
 	div_m2 = div_m2 | DDRPLL_M2;
 	writel(div_m2, &cmwkup->divm2dpllddr);

 	clkmode = (clkmode & CLK_MODE_MASK) | CLK_MODE_SEL;
 	writel(clkmode, &cmwkup->clkmoddpllddr);

 	/* Wait till dpll is locked */
 	while ((readl(&cmwkup->idlestdpllddr) & ST_DPLL_CLK) != ST_DPLL_CLK)
 		;
 }

 void enable_emif_clocks(void)
 {
 	/* Enable the  EMIF_FW Functional clock */
 	writel(PRCM_MOD_EN, &cmper->emiffwclkctrl);
 	/* Enable EMIF0 Clock */
 	writel(PRCM_MOD_EN, &cmper->emifclkctrl);
 	/* Poll if module is functional */
 	while ((readl(&cmper->emifclkctrl)) != PRCM_MOD_EN)
 		;
 }

 /*
  * Configure the PLL/PRCM for necessary peripherals
  */
 void pll_init()
 {
 	mpu_pll_config();
 	core_pll_config();
 	per_pll_config();

 	/* Enable the required interconnect clocks */
 	enable_interface_clocks();

 	/* Power domain wake up transition */
 	power_domain_wkup_transition();

 	/* Enable the required peripherals */
 	enable_per_clocks();
 }
	/*
	* clock.c
	*
	* clocks for AM33XX based boards
	*
	* Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation; either version 2 of
	* the License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the
	* GNU General Public License for more details.
	*/

	#include <common.h>
	#include <asm/arch/cpu.h>
	#include <asm/arch/clock.h>
	#include <asm/arch/hardware.h>
	#include <asm/io.h>

	#define PRCM_MOD_EN 0x2
	#define PRCM_FORCE_WAKEUP 0x2
	#define PRCM_FUNCTL 0x0

	#define PRCM_EMIF_CLK_ACTIVITY BIT(2)
	#define PRCM_L3_GCLK_ACTIVITY BIT(4)

	#define PLL_BYPASS_MODE 0x4
	#define ST_MN_BYPASS 0x00000100
	#define ST_DPLL_CLK 0x00000001
	#define CLK_SEL_MASK 0x7ffff
	#define CLK_DIV_MASK 0x1f
	#define CLK_DIV2_MASK 0x7f
	#define CLK_SEL_SHIFT 0x8
	#define CLK_MODE_SEL 0x7
	#define CLK_MODE_MASK 0xfffffff8
	#define CLK_DIV_SEL 0xFFFFFFE0
	#define CPGMAC0_IDLE 0x30000

	const struct cm_perpll cmper = (struct cm_perpll )CM_PER;
	const struct cm_wkuppll cmwkup = (struct cm_wkuppll )CM_WKUP;
	const struct cm_dpll cmdpll = (struct cm_dpll )CM_DPLL;

	static void enable_interface_clocks(void)
	{
	/* Enable all the Interconnect Modules */
	writel(PRCM_MOD_EN, &cmper->l3clkctrl);
	while (readl(&cmper->l3clkctrl) != PRCM_MOD_EN)
	;

	writel(PRCM_MOD_EN, &cmper->l4lsclkctrl);
	while (readl(&cmper->l4lsclkctrl) != PRCM_MOD_EN)
	;

	writel(PRCM_MOD_EN, &cmper->l4fwclkctrl);
	while (readl(&cmper->l4fwclkctrl) != PRCM_MOD_EN)
	;

	writel(PRCM_MOD_EN, &cmwkup->wkl4wkclkctrl);
	while (readl(&cmwkup->wkl4wkclkctrl) != PRCM_MOD_EN)
	;

	writel(PRCM_MOD_EN, &cmper->l3instrclkctrl);
	while (readl(&cmper->l3instrclkctrl) != PRCM_MOD_EN)
	;

	writel(PRCM_MOD_EN, &cmper->l4hsclkctrl);
	while (readl(&cmper->l4hsclkctrl) != PRCM_MOD_EN)
	;

	writel(PRCM_MOD_EN, &cmwkup->wkgpio0clkctrl);
	while (readl(&cmwkup->wkgpio0clkctrl) != PRCM_MOD_EN)
	;
	}

	/*
	* Force power domain wake up transition
	* Ensure that the corresponding interface clock is active before
	* using the peripheral
	*/
	static void power_domain_wkup_transition(void)
	{
	writel(PRCM_FORCE_WAKEUP, &cmper->l3clkstctrl);
	writel(PRCM_FORCE_WAKEUP, &cmper->l4lsclkstctrl);
	writel(PRCM_FORCE_WAKEUP, &cmwkup->wkclkstctrl);
	writel(PRCM_FORCE_WAKEUP, &cmper->l4fwclkstctrl);
	writel(PRCM_FORCE_WAKEUP, &cmper->l3sclkstctrl);
	}

	/*
	* Enable the peripheral clock for required peripherals
	*/
	static void enable_per_clocks(void)
	{
	/* Enable the control module though RBL would have done it*/
	writel(PRCM_MOD_EN, &cmwkup->wkctrlclkctrl);
	while (readl(&cmwkup->wkctrlclkctrl) != PRCM_MOD_EN)
	;

	/* Enable the module clock */
	writel(PRCM_MOD_EN, &cmper->timer2clkctrl);
	while (readl(&cmper->timer2clkctrl) != PRCM_MOD_EN)
	;

	/* Select the Master osc 24 MHZ as Timer2 clock source */
	writel(0x1, &cmdpll->clktimer2clk);

	/* UART0 */
	writel(PRCM_MOD_EN, &cmwkup->wkup_uart0ctrl);
	while (readl(&cmwkup->wkup_uart0ctrl) != PRCM_MOD_EN)
	;

	/* MMC0*/
	writel(PRCM_MOD_EN, &cmper->mmc0clkctrl);
	while (readl(&cmper->mmc0clkctrl) != PRCM_MOD_EN)
	;

	/* i2c0 */
	writel(PRCM_MOD_EN, &cmwkup->wkup_i2c0ctrl);
	while (readl(&cmwkup->wkup_i2c0ctrl) != PRCM_MOD_EN)
	;

	/* gpio1 module */
	writel(PRCM_MOD_EN, &cmper->gpio1clkctrl);
	while (readl(&cmper->gpio1clkctrl) != PRCM_MOD_EN)
	;

	/* gpio2 module */
	writel(PRCM_MOD_EN, &cmper->gpio2clkctrl);
	while (readl(&cmper->gpio2clkctrl) != PRCM_MOD_EN)
	;

	/* gpio3 module */
	writel(PRCM_MOD_EN, &cmper->gpio3clkctrl);
	while (readl(&cmper->gpio3clkctrl) != PRCM_MOD_EN)
	;

	/* i2c1 */
	writel(PRCM_MOD_EN, &cmper->i2c1clkctrl);
	while (readl(&cmper->i2c1clkctrl) != PRCM_MOD_EN)
	;

	/* Ethernet */
	writel(PRCM_MOD_EN, &cmper->cpgmac0clkctrl);
	while ((readl(&cmper->cpgmac0clkctrl) & CPGMAC0_IDLE) != PRCM_FUNCTL)
	;

	/* spi0 */
	writel(PRCM_MOD_EN, &cmper->spi0clkctrl);
	while (readl(&cmper->spi0clkctrl) != PRCM_MOD_EN)
	;
	}

	static void mpu_pll_config(void)
	{
	u32 clkmode, clksel, div_m2;

	clkmode = readl(&cmwkup->clkmoddpllmpu);
	clksel = readl(&cmwkup->clkseldpllmpu);
	div_m2 = readl(&cmwkup->divm2dpllmpu);

	/* Set the PLL to bypass Mode */
	writel(PLL_BYPASS_MODE, &cmwkup->clkmoddpllmpu);
	while (readl(&cmwkup->idlestdpllmpu) != ST_MN_BYPASS)
	;

	clksel = clksel & (~CLK_SEL_MASK);
	clksel = clksel \| ((MPUPLL_M << CLK_SEL_SHIFT) \| MPUPLL_N);
	writel(clksel, &cmwkup->clkseldpllmpu);

	div_m2 = div_m2 & ~CLK_DIV_MASK;
	div_m2 = div_m2 \| MPUPLL_M2;
	writel(div_m2, &cmwkup->divm2dpllmpu);

	clkmode = clkmode \| CLK_MODE_SEL;
	writel(clkmode, &cmwkup->clkmoddpllmpu);

	while (readl(&cmwkup->idlestdpllmpu) != ST_DPLL_CLK)
	;
	}

	static void core_pll_config(void)
	{
	u32 clkmode, clksel, div_m4, div_m5, div_m6;

	clkmode = readl(&cmwkup->clkmoddpllcore);
	clksel = readl(&cmwkup->clkseldpllcore);
	div_m4 = readl(&cmwkup->divm4dpllcore);
	div_m5 = readl(&cmwkup->divm5dpllcore);
	div_m6 = readl(&cmwkup->divm6dpllcore);

	/* Set the PLL to bypass Mode */
	writel(PLL_BYPASS_MODE, &cmwkup->clkmoddpllcore);

	while (readl(&cmwkup->idlestdpllcore) != ST_MN_BYPASS)
	;

	clksel = clksel & (~CLK_SEL_MASK);
	clksel = clksel \| ((COREPLL_M << CLK_SEL_SHIFT) \| COREPLL_N);
	writel(clksel, &cmwkup->clkseldpllcore);

	div_m4 = div_m4 & ~CLK_DIV_MASK;
	div_m4 = div_m4 \| COREPLL_M4;
	writel(div_m4, &cmwkup->divm4dpllcore);

	div_m5 = div_m5 & ~CLK_DIV_MASK;
	div_m5 = div_m5 \| COREPLL_M5;
	writel(div_m5, &cmwkup->divm5dpllcore);

	div_m6 = div_m6 & ~CLK_DIV_MASK;
	div_m6 = div_m6 \| COREPLL_M6;
	writel(div_m6, &cmwkup->divm6dpllcore);

	clkmode = clkmode \| CLK_MODE_SEL;
	writel(clkmode, &cmwkup->clkmoddpllcore);

	while (readl(&cmwkup->idlestdpllcore) != ST_DPLL_CLK)
	;
	}

	static void per_pll_config(void)
	{
	u32 clkmode, clksel, div_m2;

	clkmode = readl(&cmwkup->clkmoddpllper);
	clksel = readl(&cmwkup->clkseldpllper);
	div_m2 = readl(&cmwkup->divm2dpllper);

	/* Set the PLL to bypass Mode */
	writel(PLL_BYPASS_MODE, &cmwkup->clkmoddpllper);

	while (readl(&cmwkup->idlestdpllper) != ST_MN_BYPASS)
	;

	clksel = clksel & (~CLK_SEL_MASK);
	clksel = clksel \| ((PERPLL_M << CLK_SEL_SHIFT) \| PERPLL_N);
	writel(clksel, &cmwkup->clkseldpllper);

	div_m2 = div_m2 & ~CLK_DIV2_MASK;
	div_m2 = div_m2 \| PERPLL_M2;
	writel(div_m2, &cmwkup->divm2dpllper);

	clkmode = clkmode \| CLK_MODE_SEL;
	writel(clkmode, &cmwkup->clkmoddpllper);

	while (readl(&cmwkup->idlestdpllper) != ST_DPLL_CLK)
	;
	}

	void ddr_pll_config(unsigned int ddrpll_m)
	{
	u32 clkmode, clksel, div_m2;

	clkmode = readl(&cmwkup->clkmoddpllddr);
	clksel = readl(&cmwkup->clkseldpllddr);
	div_m2 = readl(&cmwkup->divm2dpllddr);

	/* Set the PLL to bypass Mode */
	clkmode = (clkmode & CLK_MODE_MASK) \| PLL_BYPASS_MODE;
	writel(clkmode, &cmwkup->clkmoddpllddr);

	/* Wait till bypass mode is enabled */
	while ((readl(&cmwkup->idlestdpllddr) & ST_MN_BYPASS)
	!= ST_MN_BYPASS)
	;

	clksel = clksel & (~CLK_SEL_MASK);
	clksel = clksel \| ((ddrpll_m << CLK_SEL_SHIFT) \| DDRPLL_N);
	writel(clksel, &cmwkup->clkseldpllddr);

	div_m2 = div_m2 & CLK_DIV_SEL;
	div_m2 = div_m2 \| DDRPLL_M2;
	writel(div_m2, &cmwkup->divm2dpllddr);

	clkmode = (clkmode & CLK_MODE_MASK) \| CLK_MODE_SEL;
	writel(clkmode, &cmwkup->clkmoddpllddr);

	/* Wait till dpll is locked */
	while ((readl(&cmwkup->idlestdpllddr) & ST_DPLL_CLK) != ST_DPLL_CLK)
	;
	}

	void enable_emif_clocks(void)
	{
	/* Enable the EMIF_FW Functional clock */
	writel(PRCM_MOD_EN, &cmper->emiffwclkctrl);
	/* Enable EMIF0 Clock */
	writel(PRCM_MOD_EN, &cmper->emifclkctrl);
	/* Poll if module is functional */
	while ((readl(&cmper->emifclkctrl)) != PRCM_MOD_EN)
	;
	}

	/*
	* Configure the PLL/PRCM for necessary peripherals
	*/
	void pll_init()
	{
	mpu_pll_config();
	core_pll_config();
	per_pll_config();

	/* Enable the required interconnect clocks */
	enable_interface_clocks();

	/* Power domain wake up transition */
	power_domain_wkup_transition();

	/* Enable the required peripherals */
	enable_per_clocks();
	}