arch/arm/mach-shmobile/clock-sh73a0.c - kernel/mindspeed - Git at Google

 /*
  * sh73a0 clock framework support
  *
  * Copyright (C) 2010 Magnus Damm
  *
  * 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
  *
  * 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.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/io.h>
 #include <linux/sh_clk.h>
 #include <linux/clkdev.h>
 #include <mach/common.h>

 #define FRQCRA		0xe6150000
 #define FRQCRB		0xe6150004
 #define FRQCRD		0xe61500e4
 #define VCLKCR1		0xe6150008
 #define VCLKCR2		0xe615000C
 #define VCLKCR3		0xe615001C
 #define ZBCKCR		0xe6150010
 #define FLCKCR		0xe6150014
 #define SD0CKCR		0xe6150074
 #define SD1CKCR		0xe6150078
 #define SD2CKCR		0xe615007C
 #define FSIACKCR	0xe6150018
 #define FSIBCKCR	0xe6150090
 #define SUBCKCR		0xe6150080
 #define SPUACKCR	0xe6150084
 #define SPUVCKCR	0xe6150094
 #define MSUCKCR		0xe6150088
 #define HSICKCR		0xe615008C
 #define MFCK1CR		0xe6150098
 #define MFCK2CR		0xe615009C
 #define DSITCKCR	0xe6150060
 #define DSI0PCKCR	0xe6150064
 #define DSI1PCKCR	0xe6150068
 #define DSI0PHYCR	0xe615006C
 #define DSI1PHYCR	0xe6150070
 #define PLLECR		0xe61500d0
 #define PLL0CR		0xe61500d8
 #define PLL1CR		0xe6150028
 #define PLL2CR		0xe615002c
 #define PLL3CR		0xe61500dc
 #define SMSTPCR0	0xe6150130
 #define SMSTPCR1	0xe6150134
 #define SMSTPCR2	0xe6150138
 #define SMSTPCR3	0xe615013c
 #define SMSTPCR4	0xe6150140
 #define SMSTPCR5	0xe6150144
 #define CKSCR		0xe61500c0

 /* Fixed 32 KHz root clock from EXTALR pin */
 static struct clk r_clk = {
 	.rate           = 32768,
 };

 /*
  * 26MHz default rate for the EXTAL1 root input clock.
  * If needed, reset this with clk_set_rate() from the platform code.
  */
 struct clk sh73a0_extal1_clk = {
 	.rate		= 26000000,
 };

 /*
  * 48MHz default rate for the EXTAL2 root input clock.
  * If needed, reset this with clk_set_rate() from the platform code.
  */
 struct clk sh73a0_extal2_clk = {
 	.rate		= 48000000,
 };

 /* A fixed divide-by-2 block */
 static unsigned long div2_recalc(struct clk *clk)
 {
 	return clk->parent->rate / 2;
 }

 static struct clk_ops div2_clk_ops = {
 	.recalc		= div2_recalc,
 };

 /* Divide extal1 by two */
 static struct clk extal1_div2_clk = {
 	.ops		= &div2_clk_ops,
 	.parent		= &sh73a0_extal1_clk,
 };

 /* Divide extal2 by two */
 static struct clk extal2_div2_clk = {
 	.ops		= &div2_clk_ops,
 	.parent		= &sh73a0_extal2_clk,
 };

 static struct clk_ops main_clk_ops = {
 	.recalc		= followparent_recalc,
 };

 /* Main clock */
 static struct clk main_clk = {
 	.ops		= &main_clk_ops,
 };

 /* Divide Main clock by two */
 static struct clk main_div2_clk = {
 	.ops		= &div2_clk_ops,
 	.parent		= &main_clk,
 };

 /* PLL0, PLL1, PLL2, PLL3 */
 static unsigned long pll_recalc(struct clk *clk)
 {
 	unsigned long mult = 1;

 	if (__raw_readl(PLLECR) & (1 << clk->enable_bit)) {
 		mult = (((__raw_readl(clk->enable_reg) >> 24) & 0x3f) + 1);
 		/* handle CFG bit for PLL1 and PLL2 */
 		switch (clk->enable_bit) {
 		case 1:
 		case 2:
 			if (__raw_readl(clk->enable_reg) & (1 << 20))
 				mult *= 2;
 		}
 	}

 	return clk->parent->rate * mult;
 }

 static struct clk_ops pll_clk_ops = {
 	.recalc		= pll_recalc,
 };

 static struct clk pll0_clk = {
 	.ops		= &pll_clk_ops,
 	.flags		= CLK_ENABLE_ON_INIT,
 	.parent		= &main_clk,
 	.enable_reg	= (void __iomem *)PLL0CR,
 	.enable_bit	= 0,
 };

 static struct clk pll1_clk = {
 	.ops		= &pll_clk_ops,
 	.flags		= CLK_ENABLE_ON_INIT,
 	.parent		= &main_clk,
 	.enable_reg	= (void __iomem *)PLL1CR,
 	.enable_bit	= 1,
 };

 static struct clk pll2_clk = {
 	.ops		= &pll_clk_ops,
 	.flags		= CLK_ENABLE_ON_INIT,
 	.parent		= &main_clk,
 	.enable_reg	= (void __iomem *)PLL2CR,
 	.enable_bit	= 2,
 };

 static struct clk pll3_clk = {
 	.ops		= &pll_clk_ops,
 	.flags		= CLK_ENABLE_ON_INIT,
 	.parent		= &main_clk,
 	.enable_reg	= (void __iomem *)PLL3CR,
 	.enable_bit	= 3,
 };

 /* Divide PLL1 by two */
 static struct clk pll1_div2_clk = {
 	.ops		= &div2_clk_ops,
 	.parent		= &pll1_clk,
 };

 static struct clk *main_clks[] = {
 	&r_clk,
 	&sh73a0_extal1_clk,
 	&sh73a0_extal2_clk,
 	&extal1_div2_clk,
 	&extal2_div2_clk,
 	&main_clk,
 	&main_div2_clk,
 	&pll0_clk,
 	&pll1_clk,
 	&pll2_clk,
 	&pll3_clk,
 	&pll1_div2_clk,
 };

 static void div4_kick(struct clk *clk)
 {
 	unsigned long value;

 	/* set KICK bit in FRQCRB to update hardware setting */
 	value = __raw_readl(FRQCRB);
 	value |= (1 << 31);
 	__raw_writel(value, FRQCRB);
 }

 static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 18,
 			  24, 0, 36, 48, 7 };

 static struct clk_div_mult_table div4_div_mult_table = {
 	.divisors = divisors,
 	.nr_divisors = ARRAY_SIZE(divisors),
 };

 static struct clk_div4_table div4_table = {
 	.div_mult_table = &div4_div_mult_table,
 	.kick = div4_kick,
 };

 enum { DIV4_I, DIV4_ZG, DIV4_M3, DIV4_B, DIV4_M1, DIV4_M2,
 	DIV4_Z, DIV4_ZTR, DIV4_ZT, DIV4_ZX, DIV4_HP, DIV4_NR };

 #define DIV4(_reg, _bit, _mask, _flags) \
 	SH_CLK_DIV4(&pll1_clk, _reg, _bit, _mask, _flags)

 static struct clk div4_clks[DIV4_NR] = {
 	[DIV4_I] = DIV4(FRQCRA, 20, 0xfff, CLK_ENABLE_ON_INIT),
 	[DIV4_ZG] = DIV4(FRQCRA, 16, 0xbff, CLK_ENABLE_ON_INIT),
 	[DIV4_M3] = DIV4(FRQCRA, 12, 0xfff, CLK_ENABLE_ON_INIT),
 	[DIV4_B] = DIV4(FRQCRA, 8, 0xfff, CLK_ENABLE_ON_INIT),
 	[DIV4_M1] = DIV4(FRQCRA, 4, 0xfff, 0),
 	[DIV4_M2] = DIV4(FRQCRA, 0, 0xfff, 0),
 	[DIV4_Z] = DIV4(FRQCRB, 24, 0xbff, 0),
 	[DIV4_ZTR] = DIV4(FRQCRB, 20, 0xfff, 0),
 	[DIV4_ZT] = DIV4(FRQCRB, 16, 0xfff, 0),
 	[DIV4_ZX] = DIV4(FRQCRB, 12, 0xfff, 0),
 	[DIV4_HP] = DIV4(FRQCRB, 4, 0xfff, 0),
 };

 enum { DIV6_VCK1, DIV6_VCK2, DIV6_VCK3, DIV6_ZB1,
 	DIV6_FLCTL, DIV6_SDHI0, DIV6_SDHI1, DIV6_SDHI2,
 	DIV6_FSIA, DIV6_FSIB, DIV6_SUB,
 	DIV6_SPUA, DIV6_SPUV, DIV6_MSU,
 	DIV6_HSI,  DIV6_MFG1, DIV6_MFG2,
 	DIV6_DSIT, DIV6_DSI0P, DIV6_DSI1P,
 	DIV6_NR };

 static struct clk div6_clks[DIV6_NR] = {
 	[DIV6_VCK1] = SH_CLK_DIV6(&pll1_div2_clk, VCLKCR1, 0),
 	[DIV6_VCK2] = SH_CLK_DIV6(&pll1_div2_clk, VCLKCR2, 0),
 	[DIV6_VCK3] = SH_CLK_DIV6(&pll1_div2_clk, VCLKCR3, 0),
 	[DIV6_ZB1] = SH_CLK_DIV6(&pll1_div2_clk, ZBCKCR, CLK_ENABLE_ON_INIT),
 	[DIV6_FLCTL] = SH_CLK_DIV6(&pll1_div2_clk, FLCKCR, 0),
 	[DIV6_SDHI0] = SH_CLK_DIV6(&pll1_div2_clk, SD0CKCR, 0),
 	[DIV6_SDHI1] = SH_CLK_DIV6(&pll1_div2_clk, SD1CKCR, 0),
 	[DIV6_SDHI2] = SH_CLK_DIV6(&pll1_div2_clk, SD2CKCR, 0),
 	[DIV6_FSIA] = SH_CLK_DIV6(&pll1_div2_clk, FSIACKCR, 0),
 	[DIV6_FSIB] = SH_CLK_DIV6(&pll1_div2_clk, FSIBCKCR, 0),
 	[DIV6_SUB] = SH_CLK_DIV6(&sh73a0_extal2_clk, SUBCKCR, 0),
 	[DIV6_SPUA] = SH_CLK_DIV6(&pll1_div2_clk, SPUACKCR, 0),
 	[DIV6_SPUV] = SH_CLK_DIV6(&pll1_div2_clk, SPUVCKCR, 0),
 	[DIV6_MSU] = SH_CLK_DIV6(&pll1_div2_clk, MSUCKCR, 0),
 	[DIV6_HSI] = SH_CLK_DIV6(&pll1_div2_clk, HSICKCR, 0),
 	[DIV6_MFG1] = SH_CLK_DIV6(&pll1_div2_clk, MFCK1CR, 0),
 	[DIV6_MFG2] = SH_CLK_DIV6(&pll1_div2_clk, MFCK2CR, 0),
 	[DIV6_DSIT] = SH_CLK_DIV6(&pll1_div2_clk, DSITCKCR, 0),
 	[DIV6_DSI0P] = SH_CLK_DIV6(&pll1_div2_clk, DSI0PCKCR, 0),
 	[DIV6_DSI1P] = SH_CLK_DIV6(&pll1_div2_clk, DSI1PCKCR, 0),
 };

 enum { MSTP001,
 	MSTP129, MSTP128, MSTP127, MSTP126, MSTP125, MSTP118, MSTP116, MSTP100,
 	MSTP219,
 	MSTP207, MSTP206, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200,
 	MSTP331, MSTP329, MSTP325, MSTP323, MSTP318,
 	MSTP314, MSTP313, MSTP312, MSTP311,
 	MSTP303, MSTP302, MSTP301, MSTP300,
 	MSTP411, MSTP410, MSTP403,
 	MSTP_NR };

 #define MSTP(_parent, _reg, _bit, _flags) \
 	SH_CLK_MSTP32(_parent, _reg, _bit, _flags)

 static struct clk mstp_clks[MSTP_NR] = {
 	[MSTP001] = MSTP(&div4_clks[DIV4_HP], SMSTPCR0, 1, 0), /* IIC2 */
 	[MSTP129] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 29, 0), /* CEU1 */
 	[MSTP128] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 28, 0), /* CSI2-RX1 */
 	[MSTP127] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 27, 0), /* CEU0 */
 	[MSTP126] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 26, 0), /* CSI2-RX0 */
 	[MSTP125] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR1, 25, 0), /* TMU0 */
 	[MSTP118] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 18, 0), /* DSITX0 */
 	[MSTP116] = MSTP(&div4_clks[DIV4_HP], SMSTPCR1, 16, 0), /* IIC0 */
 	[MSTP100] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 0, 0), /* LCDC0 */
 	[MSTP219] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 19, 0), /* SCIFA7 */
 	[MSTP207] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 7, 0), /* SCIFA5 */
 	[MSTP206] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 6, 0), /* SCIFB */
 	[MSTP204] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 4, 0), /* SCIFA0 */
 	[MSTP203] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 3, 0), /* SCIFA1 */
 	[MSTP202] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 2, 0), /* SCIFA2 */
 	[MSTP201] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 1, 0), /* SCIFA3 */
 	[MSTP200] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 0, 0), /* SCIFA4 */
 	[MSTP331] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR3, 31, 0), /* SCIFA6 */
 	[MSTP329] = MSTP(&r_clk, SMSTPCR3, 29, 0), /* CMT10 */
 	[MSTP325] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR3, 25, 0), /* IrDA */
 	[MSTP323] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 23, 0), /* IIC1 */
 	[MSTP318] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 18, 0), /* SY-DMAC */
 	[MSTP314] = MSTP(&div6_clks[DIV6_SDHI0], SMSTPCR3, 14, 0), /* SDHI0 */
 	[MSTP313] = MSTP(&div6_clks[DIV6_SDHI1], SMSTPCR3, 13, 0), /* SDHI1 */
 	[MSTP312] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 12, 0), /* MMCIF0 */
 	[MSTP311] = MSTP(&div6_clks[DIV6_SDHI2], SMSTPCR3, 11, 0), /* SDHI2 */
 	[MSTP303] = MSTP(&main_div2_clk, SMSTPCR3, 3, 0), /* TPU1 */
 	[MSTP302] = MSTP(&main_div2_clk, SMSTPCR3, 2, 0), /* TPU2 */
 	[MSTP301] = MSTP(&main_div2_clk, SMSTPCR3, 1, 0), /* TPU3 */
 	[MSTP300] = MSTP(&main_div2_clk, SMSTPCR3, 0, 0), /* TPU4 */
 	[MSTP411] = MSTP(&div4_clks[DIV4_HP], SMSTPCR4, 11, 0), /* IIC3 */
 	[MSTP410] = MSTP(&div4_clks[DIV4_HP], SMSTPCR4, 10, 0), /* IIC4 */
 	[MSTP403] = MSTP(&r_clk, SMSTPCR4, 3, 0), /* KEYSC */
 };

 static struct clk_lookup lookups[] = {
 	/* main clocks */
 	CLKDEV_CON_ID("r_clk", &r_clk),

 	/* DIV6 clocks */
 	CLKDEV_CON_ID("vck1_clk", &div6_clks[DIV6_VCK1]),
 	CLKDEV_CON_ID("vck2_clk", &div6_clks[DIV6_VCK2]),
 	CLKDEV_CON_ID("vck3_clk", &div6_clks[DIV6_VCK3]),
 	CLKDEV_CON_ID("sdhi0_clk", &div6_clks[DIV6_SDHI0]),
 	CLKDEV_CON_ID("sdhi1_clk", &div6_clks[DIV6_SDHI1]),
 	CLKDEV_CON_ID("sdhi2_clk", &div6_clks[DIV6_SDHI2]),
 	CLKDEV_ICK_ID("dsit_clk", "sh-mipi-dsi.0", &div6_clks[DIV6_DSIT]),
 	CLKDEV_ICK_ID("dsit_clk", "sh-mipi-dsi.1", &div6_clks[DIV6_DSIT]),
 	CLKDEV_ICK_ID("dsi0p_clk", "sh-mipi-dsi.0", &div6_clks[DIV6_DSI0P]),
 	CLKDEV_ICK_ID("dsi1p_clk", "sh-mipi-dsi.1", &div6_clks[DIV6_DSI1P]),

 	/* MSTP32 clocks */
 	CLKDEV_DEV_ID("i2c-sh_mobile.2", &mstp_clks[MSTP001]), /* I2C2 */
 	CLKDEV_DEV_ID("sh_mobile_ceu.1", &mstp_clks[MSTP129]), /* CEU1 */
 	CLKDEV_DEV_ID("sh-mobile-csi2.1", &mstp_clks[MSTP128]), /* CSI2-RX1 */
 	CLKDEV_DEV_ID("sh_mobile_ceu.0", &mstp_clks[MSTP127]), /* CEU0 */
 	CLKDEV_DEV_ID("sh-mobile-csi2.0", &mstp_clks[MSTP126]), /* CSI2-RX0 */
 	CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP125]), /* TMU00 */
 	CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP125]), /* TMU01 */
 	CLKDEV_DEV_ID("sh-mipi-dsi.0", &mstp_clks[MSTP118]), /* DSITX */
 	CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[MSTP116]), /* I2C0 */
 	CLKDEV_DEV_ID("sh_mobile_lcdc_fb.0", &mstp_clks[MSTP100]), /* LCDC0 */
 	CLKDEV_DEV_ID("sh-sci.7", &mstp_clks[MSTP219]), /* SCIFA7 */
 	CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP207]), /* SCIFA5 */
 	CLKDEV_DEV_ID("sh-sci.8", &mstp_clks[MSTP206]), /* SCIFB */
 	CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP204]), /* SCIFA0 */
 	CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP203]), /* SCIFA1 */
 	CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP202]), /* SCIFA2 */
 	CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP201]), /* SCIFA3 */
 	CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP200]), /* SCIFA4 */
 	CLKDEV_DEV_ID("sh-sci.6", &mstp_clks[MSTP331]), /* SCIFA6 */
 	CLKDEV_DEV_ID("sh_cmt.10", &mstp_clks[MSTP329]), /* CMT10 */
 	CLKDEV_DEV_ID("sh_irda.0", &mstp_clks[MSTP325]), /* IrDA */
 	CLKDEV_DEV_ID("i2c-sh_mobile.1", &mstp_clks[MSTP323]), /* I2C1 */
 	CLKDEV_DEV_ID("sh-dma-engine.0", &mstp_clks[MSTP318]), /* SY-DMAC */
 	CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[MSTP314]), /* SDHI0 */
 	CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[MSTP313]), /* SDHI1 */
 	CLKDEV_DEV_ID("sh_mmcif.0", &mstp_clks[MSTP312]), /* MMCIF0 */
 	CLKDEV_DEV_ID("sh_mobile_sdhi.2", &mstp_clks[MSTP311]), /* SDHI2 */
 	CLKDEV_DEV_ID("leds-renesas-tpu.12", &mstp_clks[MSTP303]), /* TPU1 */
 	CLKDEV_DEV_ID("leds-renesas-tpu.21", &mstp_clks[MSTP302]), /* TPU2 */
 	CLKDEV_DEV_ID("leds-renesas-tpu.30", &mstp_clks[MSTP301]), /* TPU3 */
 	CLKDEV_DEV_ID("leds-renesas-tpu.41", &mstp_clks[MSTP300]), /* TPU4 */
 	CLKDEV_DEV_ID("i2c-sh_mobile.3", &mstp_clks[MSTP411]), /* I2C3 */
 	CLKDEV_DEV_ID("i2c-sh_mobile.4", &mstp_clks[MSTP410]), /* I2C4 */
 	CLKDEV_DEV_ID("sh_keysc.0", &mstp_clks[MSTP403]), /* KEYSC */
 };

 void __init sh73a0_clock_init(void)
 {
 	int k, ret = 0;

 	/* Set SDHI clocks to a known state */
 	__raw_writel(0x108, SD0CKCR);
 	__raw_writel(0x108, SD1CKCR);
 	__raw_writel(0x108, SD2CKCR);

 	/* detect main clock parent */
 	switch ((__raw_readl(CKSCR) >> 28) & 0x03) {
 	case 0:
 		main_clk.parent = &sh73a0_extal1_clk;
 		break;
 	case 1:
 		main_clk.parent = &extal1_div2_clk;
 		break;
 	case 2:
 		main_clk.parent = &sh73a0_extal2_clk;
 		break;
 	case 3:
 		main_clk.parent = &extal2_div2_clk;
 		break;
 	}

 	for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
 		ret = clk_register(main_clks[k]);

 	if (!ret)
 		ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);

 	if (!ret)
 		ret = sh_clk_div6_register(div6_clks, DIV6_NR);

 	if (!ret)
 		ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR);

 	clkdev_add_table(lookups, ARRAY_SIZE(lookups));

 	if (!ret)
 		clk_init();
 	else
 		panic("failed to setup sh73a0 clocks\n");
 }
	/*
	* sh73a0 clock framework support
	*
	* Copyright (C) 2010 Magnus Damm
	*
	* 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
	*
	* 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.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	*/
	#include <linux/init.h>
	#include <linux/kernel.h>
	#include <linux/io.h>
	#include <linux/sh_clk.h>
	#include <linux/clkdev.h>
	#include <mach/common.h>

	#define FRQCRA 0xe6150000
	#define FRQCRB 0xe6150004
	#define FRQCRD 0xe61500e4
	#define VCLKCR1 0xe6150008
	#define VCLKCR2 0xe615000C
	#define VCLKCR3 0xe615001C
	#define ZBCKCR 0xe6150010
	#define FLCKCR 0xe6150014
	#define SD0CKCR 0xe6150074
	#define SD1CKCR 0xe6150078
	#define SD2CKCR 0xe615007C
	#define FSIACKCR 0xe6150018
	#define FSIBCKCR 0xe6150090
	#define SUBCKCR 0xe6150080
	#define SPUACKCR 0xe6150084
	#define SPUVCKCR 0xe6150094
	#define MSUCKCR 0xe6150088
	#define HSICKCR 0xe615008C
	#define MFCK1CR 0xe6150098
	#define MFCK2CR 0xe615009C
	#define DSITCKCR 0xe6150060
	#define DSI0PCKCR 0xe6150064
	#define DSI1PCKCR 0xe6150068
	#define DSI0PHYCR 0xe615006C
	#define DSI1PHYCR 0xe6150070
	#define PLLECR 0xe61500d0
	#define PLL0CR 0xe61500d8
	#define PLL1CR 0xe6150028
	#define PLL2CR 0xe615002c
	#define PLL3CR 0xe61500dc
	#define SMSTPCR0 0xe6150130
	#define SMSTPCR1 0xe6150134
	#define SMSTPCR2 0xe6150138
	#define SMSTPCR3 0xe615013c
	#define SMSTPCR4 0xe6150140
	#define SMSTPCR5 0xe6150144
	#define CKSCR 0xe61500c0

	/* Fixed 32 KHz root clock from EXTALR pin */
	static struct clk r_clk = {
	.rate = 32768,
	};

	/*
	* 26MHz default rate for the EXTAL1 root input clock.
	* If needed, reset this with clk_set_rate() from the platform code.
	*/
	struct clk sh73a0_extal1_clk = {
	.rate = 26000000,
	};

	/*
	* 48MHz default rate for the EXTAL2 root input clock.
	* If needed, reset this with clk_set_rate() from the platform code.
	*/
	struct clk sh73a0_extal2_clk = {
	.rate = 48000000,
	};

	/* A fixed divide-by-2 block */
	static unsigned long div2_recalc(struct clk *clk)
	{
	return clk->parent->rate / 2;
	}

	static struct clk_ops div2_clk_ops = {
	.recalc = div2_recalc,
	};

	/* Divide extal1 by two */
	static struct clk extal1_div2_clk = {
	.ops = &div2_clk_ops,
	.parent = &sh73a0_extal1_clk,
	};

	/* Divide extal2 by two */
	static struct clk extal2_div2_clk = {
	.ops = &div2_clk_ops,
	.parent = &sh73a0_extal2_clk,
	};

	static struct clk_ops main_clk_ops = {
	.recalc = followparent_recalc,
	};

	/* Main clock */
	static struct clk main_clk = {
	.ops = &main_clk_ops,
	};

	/* Divide Main clock by two */
	static struct clk main_div2_clk = {
	.ops = &div2_clk_ops,
	.parent = &main_clk,
	};

	/* PLL0, PLL1, PLL2, PLL3 */
	static unsigned long pll_recalc(struct clk *clk)
	{
	unsigned long mult = 1;

	if (__raw_readl(PLLECR) & (1 << clk->enable_bit)) {
	mult = (((__raw_readl(clk->enable_reg) >> 24) & 0x3f) + 1);
	/* handle CFG bit for PLL1 and PLL2 */
	switch (clk->enable_bit) {
	case 1:
	case 2:
	if (__raw_readl(clk->enable_reg) & (1 << 20))
	mult *= 2;
	}
	}

	return clk->parent->rate * mult;
	}

	static struct clk_ops pll_clk_ops = {
	.recalc = pll_recalc,
	};

	static struct clk pll0_clk = {
	.ops = &pll_clk_ops,
	.flags = CLK_ENABLE_ON_INIT,
	.parent = &main_clk,
	.enable_reg = (void __iomem *)PLL0CR,
	.enable_bit = 0,
	};

	static struct clk pll1_clk = {
	.ops = &pll_clk_ops,
	.flags = CLK_ENABLE_ON_INIT,
	.parent = &main_clk,
	.enable_reg = (void __iomem *)PLL1CR,
	.enable_bit = 1,
	};

	static struct clk pll2_clk = {
	.ops = &pll_clk_ops,
	.flags = CLK_ENABLE_ON_INIT,
	.parent = &main_clk,
	.enable_reg = (void __iomem *)PLL2CR,
	.enable_bit = 2,
	};

	static struct clk pll3_clk = {
	.ops = &pll_clk_ops,
	.flags = CLK_ENABLE_ON_INIT,
	.parent = &main_clk,
	.enable_reg = (void __iomem *)PLL3CR,
	.enable_bit = 3,
	};

	/* Divide PLL1 by two */
	static struct clk pll1_div2_clk = {
	.ops = &div2_clk_ops,
	.parent = &pll1_clk,
	};

	static struct clk *main_clks[] = {
	&r_clk,
	&sh73a0_extal1_clk,
	&sh73a0_extal2_clk,
	&extal1_div2_clk,
	&extal2_div2_clk,
	&main_clk,
	&main_div2_clk,
	&pll0_clk,
	&pll1_clk,
	&pll2_clk,
	&pll3_clk,
	&pll1_div2_clk,
	};

	static void div4_kick(struct clk *clk)
	{
	unsigned long value;

	/* set KICK bit in FRQCRB to update hardware setting */
	value = __raw_readl(FRQCRB);
	value \|= (1 << 31);
	__raw_writel(value, FRQCRB);
	}

	static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 18,
	24, 0, 36, 48, 7 };

	static struct clk_div_mult_table div4_div_mult_table = {
	.divisors = divisors,
	.nr_divisors = ARRAY_SIZE(divisors),
	};

	static struct clk_div4_table div4_table = {
	.div_mult_table = &div4_div_mult_table,
	.kick = div4_kick,
	};

	enum { DIV4_I, DIV4_ZG, DIV4_M3, DIV4_B, DIV4_M1, DIV4_M2,
	DIV4_Z, DIV4_ZTR, DIV4_ZT, DIV4_ZX, DIV4_HP, DIV4_NR };

	#define DIV4(_reg, _bit, _mask, _flags) \
	SH_CLK_DIV4(&pll1_clk, _reg, _bit, _mask, _flags)

	static struct clk div4_clks[DIV4_NR] = {
	[DIV4_I] = DIV4(FRQCRA, 20, 0xfff, CLK_ENABLE_ON_INIT),
	[DIV4_ZG] = DIV4(FRQCRA, 16, 0xbff, CLK_ENABLE_ON_INIT),
	[DIV4_M3] = DIV4(FRQCRA, 12, 0xfff, CLK_ENABLE_ON_INIT),
	[DIV4_B] = DIV4(FRQCRA, 8, 0xfff, CLK_ENABLE_ON_INIT),
	[DIV4_M1] = DIV4(FRQCRA, 4, 0xfff, 0),
	[DIV4_M2] = DIV4(FRQCRA, 0, 0xfff, 0),
	[DIV4_Z] = DIV4(FRQCRB, 24, 0xbff, 0),
	[DIV4_ZTR] = DIV4(FRQCRB, 20, 0xfff, 0),
	[DIV4_ZT] = DIV4(FRQCRB, 16, 0xfff, 0),
	[DIV4_ZX] = DIV4(FRQCRB, 12, 0xfff, 0),
	[DIV4_HP] = DIV4(FRQCRB, 4, 0xfff, 0),
	};

	enum { DIV6_VCK1, DIV6_VCK2, DIV6_VCK3, DIV6_ZB1,
	DIV6_FLCTL, DIV6_SDHI0, DIV6_SDHI1, DIV6_SDHI2,
	DIV6_FSIA, DIV6_FSIB, DIV6_SUB,
	DIV6_SPUA, DIV6_SPUV, DIV6_MSU,
	DIV6_HSI, DIV6_MFG1, DIV6_MFG2,
	DIV6_DSIT, DIV6_DSI0P, DIV6_DSI1P,
	DIV6_NR };

	static struct clk div6_clks[DIV6_NR] = {
	[DIV6_VCK1] = SH_CLK_DIV6(&pll1_div2_clk, VCLKCR1, 0),
	[DIV6_VCK2] = SH_CLK_DIV6(&pll1_div2_clk, VCLKCR2, 0),
	[DIV6_VCK3] = SH_CLK_DIV6(&pll1_div2_clk, VCLKCR3, 0),
	[DIV6_ZB1] = SH_CLK_DIV6(&pll1_div2_clk, ZBCKCR, CLK_ENABLE_ON_INIT),
	[DIV6_FLCTL] = SH_CLK_DIV6(&pll1_div2_clk, FLCKCR, 0),
	[DIV6_SDHI0] = SH_CLK_DIV6(&pll1_div2_clk, SD0CKCR, 0),
	[DIV6_SDHI1] = SH_CLK_DIV6(&pll1_div2_clk, SD1CKCR, 0),
	[DIV6_SDHI2] = SH_CLK_DIV6(&pll1_div2_clk, SD2CKCR, 0),
	[DIV6_FSIA] = SH_CLK_DIV6(&pll1_div2_clk, FSIACKCR, 0),
	[DIV6_FSIB] = SH_CLK_DIV6(&pll1_div2_clk, FSIBCKCR, 0),
	[DIV6_SUB] = SH_CLK_DIV6(&sh73a0_extal2_clk, SUBCKCR, 0),
	[DIV6_SPUA] = SH_CLK_DIV6(&pll1_div2_clk, SPUACKCR, 0),
	[DIV6_SPUV] = SH_CLK_DIV6(&pll1_div2_clk, SPUVCKCR, 0),
	[DIV6_MSU] = SH_CLK_DIV6(&pll1_div2_clk, MSUCKCR, 0),
	[DIV6_HSI] = SH_CLK_DIV6(&pll1_div2_clk, HSICKCR, 0),
	[DIV6_MFG1] = SH_CLK_DIV6(&pll1_div2_clk, MFCK1CR, 0),
	[DIV6_MFG2] = SH_CLK_DIV6(&pll1_div2_clk, MFCK2CR, 0),
	[DIV6_DSIT] = SH_CLK_DIV6(&pll1_div2_clk, DSITCKCR, 0),
	[DIV6_DSI0P] = SH_CLK_DIV6(&pll1_div2_clk, DSI0PCKCR, 0),
	[DIV6_DSI1P] = SH_CLK_DIV6(&pll1_div2_clk, DSI1PCKCR, 0),
	};

	enum { MSTP001,
	MSTP129, MSTP128, MSTP127, MSTP126, MSTP125, MSTP118, MSTP116, MSTP100,
	MSTP219,
	MSTP207, MSTP206, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200,
	MSTP331, MSTP329, MSTP325, MSTP323, MSTP318,
	MSTP314, MSTP313, MSTP312, MSTP311,
	MSTP303, MSTP302, MSTP301, MSTP300,
	MSTP411, MSTP410, MSTP403,
	MSTP_NR };

	#define MSTP(_parent, _reg, _bit, _flags) \
	SH_CLK_MSTP32(_parent, _reg, _bit, _flags)

	static struct clk mstp_clks[MSTP_NR] = {
	[MSTP001] = MSTP(&div4_clks[DIV4_HP], SMSTPCR0, 1, 0), /* IIC2 */
	[MSTP129] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 29, 0), /* CEU1 */
	[MSTP128] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 28, 0), /* CSI2-RX1 */
	[MSTP127] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 27, 0), /* CEU0 */
	[MSTP126] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 26, 0), /* CSI2-RX0 */
	[MSTP125] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR1, 25, 0), /* TMU0 */
	[MSTP118] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 18, 0), /* DSITX0 */
	[MSTP116] = MSTP(&div4_clks[DIV4_HP], SMSTPCR1, 16, 0), /* IIC0 */
	[MSTP100] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 0, 0), /* LCDC0 */
	[MSTP219] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 19, 0), /* SCIFA7 */
	[MSTP207] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 7, 0), /* SCIFA5 */
	[MSTP206] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 6, 0), /* SCIFB */
	[MSTP204] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 4, 0), /* SCIFA0 */
	[MSTP203] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 3, 0), /* SCIFA1 */
	[MSTP202] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 2, 0), /* SCIFA2 */
	[MSTP201] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 1, 0), /* SCIFA3 */
	[MSTP200] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 0, 0), /* SCIFA4 */
	[MSTP331] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR3, 31, 0), /* SCIFA6 */
	[MSTP329] = MSTP(&r_clk, SMSTPCR3, 29, 0), /* CMT10 */
	[MSTP325] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR3, 25, 0), /* IrDA */
	[MSTP323] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 23, 0), /* IIC1 */
	[MSTP318] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 18, 0), /* SY-DMAC */
	[MSTP314] = MSTP(&div6_clks[DIV6_SDHI0], SMSTPCR3, 14, 0), /* SDHI0 */
	[MSTP313] = MSTP(&div6_clks[DIV6_SDHI1], SMSTPCR3, 13, 0), /* SDHI1 */
	[MSTP312] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 12, 0), /* MMCIF0 */
	[MSTP311] = MSTP(&div6_clks[DIV6_SDHI2], SMSTPCR3, 11, 0), /* SDHI2 */
	[MSTP303] = MSTP(&main_div2_clk, SMSTPCR3, 3, 0), /* TPU1 */
	[MSTP302] = MSTP(&main_div2_clk, SMSTPCR3, 2, 0), /* TPU2 */
	[MSTP301] = MSTP(&main_div2_clk, SMSTPCR3, 1, 0), /* TPU3 */
	[MSTP300] = MSTP(&main_div2_clk, SMSTPCR3, 0, 0), /* TPU4 */
	[MSTP411] = MSTP(&div4_clks[DIV4_HP], SMSTPCR4, 11, 0), /* IIC3 */
	[MSTP410] = MSTP(&div4_clks[DIV4_HP], SMSTPCR4, 10, 0), /* IIC4 */
	[MSTP403] = MSTP(&r_clk, SMSTPCR4, 3, 0), /* KEYSC */
	};

	static struct clk_lookup lookups[] = {
	/* main clocks */
	CLKDEV_CON_ID("r_clk", &r_clk),

	/* DIV6 clocks */
	CLKDEV_CON_ID("vck1_clk", &div6_clks[DIV6_VCK1]),
	CLKDEV_CON_ID("vck2_clk", &div6_clks[DIV6_VCK2]),
	CLKDEV_CON_ID("vck3_clk", &div6_clks[DIV6_VCK3]),
	CLKDEV_CON_ID("sdhi0_clk", &div6_clks[DIV6_SDHI0]),
	CLKDEV_CON_ID("sdhi1_clk", &div6_clks[DIV6_SDHI1]),
	CLKDEV_CON_ID("sdhi2_clk", &div6_clks[DIV6_SDHI2]),
	CLKDEV_ICK_ID("dsit_clk", "sh-mipi-dsi.0", &div6_clks[DIV6_DSIT]),
	CLKDEV_ICK_ID("dsit_clk", "sh-mipi-dsi.1", &div6_clks[DIV6_DSIT]),
	CLKDEV_ICK_ID("dsi0p_clk", "sh-mipi-dsi.0", &div6_clks[DIV6_DSI0P]),
	CLKDEV_ICK_ID("dsi1p_clk", "sh-mipi-dsi.1", &div6_clks[DIV6_DSI1P]),

	/* MSTP32 clocks */
	CLKDEV_DEV_ID("i2c-sh_mobile.2", &mstp_clks[MSTP001]), /* I2C2 */
	CLKDEV_DEV_ID("sh_mobile_ceu.1", &mstp_clks[MSTP129]), /* CEU1 */
	CLKDEV_DEV_ID("sh-mobile-csi2.1", &mstp_clks[MSTP128]), /* CSI2-RX1 */
	CLKDEV_DEV_ID("sh_mobile_ceu.0", &mstp_clks[MSTP127]), /* CEU0 */
	CLKDEV_DEV_ID("sh-mobile-csi2.0", &mstp_clks[MSTP126]), /* CSI2-RX0 */
	CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP125]), /* TMU00 */
	CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP125]), /* TMU01 */
	CLKDEV_DEV_ID("sh-mipi-dsi.0", &mstp_clks[MSTP118]), /* DSITX */
	CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[MSTP116]), /* I2C0 */
	CLKDEV_DEV_ID("sh_mobile_lcdc_fb.0", &mstp_clks[MSTP100]), /* LCDC0 */
	CLKDEV_DEV_ID("sh-sci.7", &mstp_clks[MSTP219]), /* SCIFA7 */
	CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP207]), /* SCIFA5 */
	CLKDEV_DEV_ID("sh-sci.8", &mstp_clks[MSTP206]), /* SCIFB */
	CLKDEV_DEV_ID("sh-sci.0", &mstp_clks[MSTP204]), /* SCIFA0 */
	CLKDEV_DEV_ID("sh-sci.1", &mstp_clks[MSTP203]), /* SCIFA1 */
	CLKDEV_DEV_ID("sh-sci.2", &mstp_clks[MSTP202]), /* SCIFA2 */
	CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP201]), /* SCIFA3 */
	CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP200]), /* SCIFA4 */
	CLKDEV_DEV_ID("sh-sci.6", &mstp_clks[MSTP331]), /* SCIFA6 */
	CLKDEV_DEV_ID("sh_cmt.10", &mstp_clks[MSTP329]), /* CMT10 */
	CLKDEV_DEV_ID("sh_irda.0", &mstp_clks[MSTP325]), /* IrDA */
	CLKDEV_DEV_ID("i2c-sh_mobile.1", &mstp_clks[MSTP323]), /* I2C1 */
	CLKDEV_DEV_ID("sh-dma-engine.0", &mstp_clks[MSTP318]), /* SY-DMAC */
	CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[MSTP314]), /* SDHI0 */
	CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[MSTP313]), /* SDHI1 */
	CLKDEV_DEV_ID("sh_mmcif.0", &mstp_clks[MSTP312]), /* MMCIF0 */
	CLKDEV_DEV_ID("sh_mobile_sdhi.2", &mstp_clks[MSTP311]), /* SDHI2 */
	CLKDEV_DEV_ID("leds-renesas-tpu.12", &mstp_clks[MSTP303]), /* TPU1 */
	CLKDEV_DEV_ID("leds-renesas-tpu.21", &mstp_clks[MSTP302]), /* TPU2 */
	CLKDEV_DEV_ID("leds-renesas-tpu.30", &mstp_clks[MSTP301]), /* TPU3 */
	CLKDEV_DEV_ID("leds-renesas-tpu.41", &mstp_clks[MSTP300]), /* TPU4 */
	CLKDEV_DEV_ID("i2c-sh_mobile.3", &mstp_clks[MSTP411]), /* I2C3 */
	CLKDEV_DEV_ID("i2c-sh_mobile.4", &mstp_clks[MSTP410]), /* I2C4 */
	CLKDEV_DEV_ID("sh_keysc.0", &mstp_clks[MSTP403]), /* KEYSC */
	};

	void __init sh73a0_clock_init(void)
	{
	int k, ret = 0;

	/* Set SDHI clocks to a known state */
	__raw_writel(0x108, SD0CKCR);
	__raw_writel(0x108, SD1CKCR);
	__raw_writel(0x108, SD2CKCR);

	/* detect main clock parent */
	switch ((__raw_readl(CKSCR) >> 28) & 0x03) {
	case 0:
	main_clk.parent = &sh73a0_extal1_clk;
	break;
	case 1:
	main_clk.parent = &extal1_div2_clk;
	break;
	case 2:
	main_clk.parent = &sh73a0_extal2_clk;
	break;
	case 3:
	main_clk.parent = &extal2_div2_clk;
	break;
	}

	for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
	ret = clk_register(main_clks[k]);

	if (!ret)
	ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table);

	if (!ret)
	ret = sh_clk_div6_register(div6_clks, DIV6_NR);

	if (!ret)
	ret = sh_clk_mstp32_register(mstp_clks, MSTP_NR);

	clkdev_add_table(lookups, ARRAY_SIZE(lookups));

	if (!ret)
	clk_init();
	else
	panic("failed to setup sh73a0 clocks\n");
	}