ARM: mach-shmobile: sh7377 clock framework V2

This patch is V2 of clock framework tables/code for sh7377.
MSTP support is included for the following hardware blocks:
KEYSC, SCIF, IIC, IRDA, FLCTL, USB, SDHI and UIO.

Signed-off-by: Magnus Damm <[e-mail]>
Signed-off-by: Paul Mundt <[e-mail]>

arch/arm/mach-shmobile/Kconfig

···
 	select CPU_V7
 	select HAVE_CLK
 	select COMMON_CLKDEV
+	select SH_CLK_CPG
 	select GENERIC_CLOCKEVENTS
 
 config ARCH_SH7372

arch/arm/mach-shmobile/Makefile

···
 
 # CPU objects
 obj-$(CONFIG_ARCH_SH7367)	+= setup-sh7367.o clock-sh7367.o intc-sh7367.o
-obj-$(CONFIG_ARCH_SH7377)	+= setup-sh7377.o clock-sh7367.o intc-sh7377.o
+obj-$(CONFIG_ARCH_SH7377)	+= setup-sh7377.o clock-sh7377.o intc-sh7377.o
 obj-$(CONFIG_ARCH_SH7372)	+= setup-sh7372.o clock-sh7372.o intc-sh7372.o
 
 # Pinmux setup

arch/arm/mach-shmobile/board-g4evm.c

···
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
+#include <asm/mach/time.h>
 
 /*
  * SDHI
···
 {
 	iotable_init(g4evm_io_desc, ARRAY_SIZE(g4evm_io_desc));
 
-	/* setup early devices, clocks and console here as well */
+	/* setup early devices and console here as well */
 	sh7377_add_early_devices();
-	sh7367_clock_init(); /* use g3 clocks for now */
 	shmobile_setup_console();
 }
 
···
 	gpio_request(GPIO_FN_EXTLP, NULL);
 	gpio_request(GPIO_FN_IDIN, NULL);
 
-	/* enable clock in SMSTPCR3 */
-	__raw_writel(__raw_readl(0xe615013c) & ~(1 << 22), 0xe615013c);
-
 	/* setup USB phy */
 	__raw_writew(0x0200, 0xe605810a);       /* USBCR1 */
 	__raw_writew(0x00e0, 0xe60581c0);       /* CPFCH */
···
 	platform_add_devices(g4evm_devices, ARRAY_SIZE(g4evm_devices));
 }
 
+static void __init g4evm_timer_init(void)
+{
+	sh7377_clock_init();
+	shmobile_timer.init();
+}
+
+static struct sys_timer g4evm_timer = {
+	.init		= g4evm_timer_init,
+};
+
 MACHINE_START(G4EVM, "g4evm")
 	.phys_io	= 0xe6000000,
 	.io_pg_offst	= ((0xe6000000) >> 18) & 0xfffc,
 	.map_io		= g4evm_map_io,
 	.init_irq	= sh7377_init_irq,
 	.init_machine	= g4evm_init,
-	.timer		= &shmobile_timer,
+	.timer		= &g4evm_timer,
 MACHINE_END

arch/arm/mach-shmobile/clock-sh7377.c

···
+/*
+ * SH7377 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 <mach/common.h>
+#include <asm/clkdev.h>
+
+/* SH7377 registers */
+#define RTFRQCR    0xe6150000
+#define SYFRQCR    0xe6150004
+#define CMFRQCR    0xe61500E0
+#define VCLKCR1    0xe6150008
+#define VCLKCR2    0xe615000C
+#define VCLKCR3    0xe615001C
+#define FMSICKCR   0xe6150010
+#define FMSOCKCR   0xe6150014
+#define FSICKCR    0xe6150018
+#define PLLC1CR    0xe6150028
+#define PLLC2CR    0xe615002C
+#define SUBUSBCKCR 0xe6150080
+#define SPUCKCR    0xe6150084
+#define MSUCKCR    0xe6150088
+#define MVI3CKCR   0xe6150090
+#define HDMICKCR   0xe6150094
+#define MFCK1CR    0xe6150098
+#define MFCK2CR    0xe615009C
+#define DSITCKCR   0xe6150060
+#define DSIPCKCR   0xe6150064
+#define SMSTPCR0   0xe6150130
+#define SMSTPCR1   0xe6150134
+#define SMSTPCR2   0xe6150138
+#define SMSTPCR3   0xe615013C
+#define SMSTPCR4   0xe6150140
+
+/* Fixed 32 KHz root clock from EXTALR pin */
+static struct clk r_clk = {
+	.rate           = 32768,
+};
+
+/*
+ * 26MHz default rate for the EXTALC1 root input clock.
+ * If needed, reset this with clk_set_rate() from the platform code.
+ */
+struct clk sh7377_extalc1_clk = {
+	.rate		= 26666666,
+};
+
+/*
+ * 48MHz default rate for the EXTAL2 root input clock.
+ * If needed, reset this with clk_set_rate() from the platform code.
+ */
+struct clk sh7377_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 extalc1 by two */
+static struct clk extalc1_div2_clk = {
+	.ops		= &div2_clk_ops,
+	.parent		= &sh7377_extalc1_clk,
+};
+
+/* Divide extal2 by two */
+static struct clk extal2_div2_clk = {
+	.ops		= &div2_clk_ops,
+	.parent		= &sh7377_extal2_clk,
+};
+
+/* Divide extal2 by four */
+static struct clk extal2_div4_clk = {
+	.ops		= &div2_clk_ops,
+	.parent		= &extal2_div2_clk,
+};
+
+/* PLLC1 */
+static unsigned long pllc1_recalc(struct clk *clk)
+{
+	unsigned long mult = 1;
+
+	if (__raw_readl(PLLC1CR) & (1 << 14))
+		mult = (((__raw_readl(RTFRQCR) >> 24) & 0x3f) + 1) * 2;
+
+	return clk->parent->rate * mult;
+}
+
+static struct clk_ops pllc1_clk_ops = {
+	.recalc		= pllc1_recalc,
+};
+
+static struct clk pllc1_clk = {
+	.ops		= &pllc1_clk_ops,
+	.flags		= CLK_ENABLE_ON_INIT,
+	.parent		= &extalc1_div2_clk,
+};
+
+/* Divide PLLC1 by two */
+static struct clk pllc1_div2_clk = {
+	.ops		= &div2_clk_ops,
+	.parent		= &pllc1_clk,
+};
+
+/* PLLC2 */
+static unsigned long pllc2_recalc(struct clk *clk)
+{
+	unsigned long mult = 1;
+
+	if (__raw_readl(PLLC2CR) & (1 << 31))
+		mult = (((__raw_readl(PLLC2CR) >> 24) & 0x3f) + 1) * 2;
+
+	return clk->parent->rate * mult;
+}
+
+static struct clk_ops pllc2_clk_ops = {
+	.recalc		= pllc2_recalc,
+};
+
+static struct clk pllc2_clk = {
+	.ops		= &pllc2_clk_ops,
+	.flags		= CLK_ENABLE_ON_INIT,
+	.parent		= &extalc1_div2_clk,
+};
+
+static struct clk *main_clks[] = {
+	&r_clk,
+	&sh7377_extalc1_clk,
+	&sh7377_extal2_clk,
+	&extalc1_div2_clk,
+	&extal2_div2_clk,
+	&extal2_div4_clk,
+	&pllc1_clk,
+	&pllc1_div2_clk,
+	&pllc2_clk,
+};
+
+static void div4_kick(struct clk *clk)
+{
+	unsigned long value;
+
+	/* set KICK bit in SYFRQCR to update hardware setting */
+	value = __raw_readl(SYFRQCR);
+	value |= (1 << 31);
+	__raw_writel(value, SYFRQCR);
+}
+
+static int divisors[] = { 2, 3, 4, 6, 8, 12, 16, 18,
+			  24, 32, 36, 48, 0, 72, 96, 0 };
+
+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_B, DIV4_M1, DIV4_CSIR,
+       DIV4_ZTR, DIV4_ZT, DIV4_Z, DIV4_HP,
+       DIV4_ZS, DIV4_ZB, DIV4_ZB3, DIV4_CP, DIV4_NR };
+
+#define DIV4(_reg, _bit, _mask, _flags) \
+  SH_CLK_DIV4(&pllc1_clk, _reg, _bit, _mask, _flags)
+
+static struct clk div4_clks[DIV4_NR] = {
+	[DIV4_I] = DIV4(RTFRQCR, 20, 0x6fff, CLK_ENABLE_ON_INIT),
+	[DIV4_ZG] = DIV4(RTFRQCR, 16, 0x6fff, CLK_ENABLE_ON_INIT),
+	[DIV4_B] = DIV4(RTFRQCR, 8, 0x6fff, CLK_ENABLE_ON_INIT),
+	[DIV4_M1] = DIV4(RTFRQCR, 4, 0x6fff, CLK_ENABLE_ON_INIT),
+	[DIV4_CSIR] = DIV4(RTFRQCR, 0, 0x6fff, 0),
+	[DIV4_ZTR] = DIV4(SYFRQCR, 20, 0x6fff, 0),
+	[DIV4_ZT] = DIV4(SYFRQCR, 16, 0x6fff, 0),
+	[DIV4_Z] = DIV4(SYFRQCR, 12, 0x6fff, 0),
+	[DIV4_HP] = DIV4(SYFRQCR, 4, 0x6fff, 0),
+	[DIV4_ZS] = DIV4(CMFRQCR, 12, 0x6fff, 0),
+	[DIV4_ZB] = DIV4(CMFRQCR, 8, 0x6fff, 0),
+	[DIV4_ZB3] = DIV4(CMFRQCR, 4, 0x6fff, 0),
+	[DIV4_CP] = DIV4(CMFRQCR, 0, 0x6fff, 0),
+};
+
+enum { DIV6_VCK1, DIV6_VCK2, DIV6_VCK3, DIV6_FMSI, DIV6_FMSO,
+       DIV6_FSI, DIV6_SUB, DIV6_SPU, DIV6_MSU, DIV6_MVI3, DIV6_HDMI,
+       DIV6_MF1, DIV6_MF2, DIV6_DSIT, DIV6_DSIP,
+       DIV6_NR };
+
+static struct clk div6_clks[] = {
+	[DIV6_VCK1] = SH_CLK_DIV6(&pllc1_div2_clk, VCLKCR1, 0),
+	[DIV6_VCK2] = SH_CLK_DIV6(&pllc1_div2_clk, VCLKCR2, 0),
+	[DIV6_VCK3] = SH_CLK_DIV6(&pllc1_div2_clk, VCLKCR3, 0),
+	[DIV6_FMSI] = SH_CLK_DIV6(&pllc1_div2_clk, FMSICKCR, 0),
+	[DIV6_FMSO] = SH_CLK_DIV6(&pllc1_div2_clk, FMSOCKCR, 0),
+	[DIV6_FSI] = SH_CLK_DIV6(&pllc1_div2_clk, FSICKCR, 0),
+	[DIV6_SUB] = SH_CLK_DIV6(&sh7377_extal2_clk, SUBUSBCKCR, 0),
+	[DIV6_SPU] = SH_CLK_DIV6(&pllc1_div2_clk, SPUCKCR, 0),
+	[DIV6_MSU] = SH_CLK_DIV6(&pllc1_div2_clk, MSUCKCR, 0),
+	[DIV6_MVI3] = SH_CLK_DIV6(&pllc1_div2_clk, MVI3CKCR, 0),
+	[DIV6_HDMI] = SH_CLK_DIV6(&pllc1_div2_clk, HDMICKCR, 0),
+	[DIV6_MF1] = SH_CLK_DIV6(&pllc1_div2_clk, MFCK1CR, 0),
+	[DIV6_MF2] = SH_CLK_DIV6(&pllc1_div2_clk, MFCK2CR, 0),
+	[DIV6_DSIT] = SH_CLK_DIV6(&pllc1_div2_clk, DSITCKCR, 0),
+	[DIV6_DSIP] = SH_CLK_DIV6(&pllc1_div2_clk, DSIPCKCR, 0),
+};
+
+enum { MSTP001,
+       MSTP131, MSTP130, MSTP129, MSTP128, MSTP116, MSTP106, MSTP101,
+       MSTP223, MSTP207, MSTP206, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200,
+       MSTP331, MSTP329, MSTP325, MSTP323, MSTP322,
+       MSTP315, MSTP314, MSTP313,
+       MSTP403,
+       MSTP_NR };
+
+#define MSTP(_parent, _reg, _bit, _flags) \
+  SH_CLK_MSTP32(_parent, _reg, _bit, _flags)
+
+static struct clk mstp_clks[] = {
+	[MSTP001] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR0, 1, 0), /* IIC2 */
+	[MSTP131] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 31, 0), /* VEU3 */
+	[MSTP130] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 30, 0), /* VEU2 */
+	[MSTP129] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 29, 0), /* VEU1 */
+	[MSTP128] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 28, 0), /* VEU0 */
+	[MSTP116] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR1, 16, 0), /* IIC0 */
+	[MSTP106] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 6, 0), /* JPU */
+	[MSTP101] = MSTP(&div4_clks[DIV4_M1], SMSTPCR1, 1, 0), /* VPU */
+	[MSTP223] = MSTP(&div6_clks[DIV6_SPU], SMSTPCR2, 23, 0), /* SPU2 */
+	[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(&div6_clks[DIV6_SUB], SMSTPCR3, 23, 0), /* IIC1 */
+	[MSTP322] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR3, 22, 0), /* USB0 */
+	[MSTP315] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 15, 0), /* FLCTL */
+	[MSTP314] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 14, 0), /* SDHI0 */
+	[MSTP313] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 13, 0), /* SDHI1 */
+	[MSTP403] = MSTP(&r_clk, SMSTPCR4, 3, 0), /* KEYSC */
+};
+
+#define CLKDEV_CON_ID(_id, _clk) { .con_id = _id, .clk = _clk }
+#define CLKDEV_DEV_ID(_id, _clk) { .dev_id = _id, .clk = _clk }
+
+static struct clk_lookup lookups[] = {
+	/* main clocks */
+	CLKDEV_CON_ID("r_clk", &r_clk),
+	CLKDEV_CON_ID("extalc1", &sh7377_extalc1_clk),
+	CLKDEV_CON_ID("extal2", &sh7377_extal2_clk),
+	CLKDEV_CON_ID("extalc1_div2_clk", &extalc1_div2_clk),
+	CLKDEV_CON_ID("extal2_div2_clk", &extal2_div2_clk),
+	CLKDEV_CON_ID("extal2_div4_clk", &extal2_div4_clk),
+	CLKDEV_CON_ID("pllc1_clk", &pllc1_clk),
+	CLKDEV_CON_ID("pllc1_div2_clk", &pllc1_div2_clk),
+	CLKDEV_CON_ID("pllc2_clk", &pllc2_clk),
+
+	/* DIV4 clocks */
+	CLKDEV_CON_ID("i_clk", &div4_clks[DIV4_I]),
+	CLKDEV_CON_ID("zg_clk", &div4_clks[DIV4_ZG]),
+	CLKDEV_CON_ID("b_clk", &div4_clks[DIV4_B]),
+	CLKDEV_CON_ID("m1_clk", &div4_clks[DIV4_M1]),
+	CLKDEV_CON_ID("csir_clk", &div4_clks[DIV4_CSIR]),
+	CLKDEV_CON_ID("ztr_clk", &div4_clks[DIV4_ZTR]),
+	CLKDEV_CON_ID("zt_clk", &div4_clks[DIV4_ZT]),
+	CLKDEV_CON_ID("z_clk", &div4_clks[DIV4_Z]),
+	CLKDEV_CON_ID("hp_clk", &div4_clks[DIV4_HP]),
+	CLKDEV_CON_ID("zs_clk", &div4_clks[DIV4_ZS]),
+	CLKDEV_CON_ID("zb_clk", &div4_clks[DIV4_ZB]),
+	CLKDEV_CON_ID("zb3_clk", &div4_clks[DIV4_ZB3]),
+	CLKDEV_CON_ID("cp_clk", &div4_clks[DIV4_CP]),
+
+	/* 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("fmsi_clk", &div6_clks[DIV6_FMSI]),
+	CLKDEV_CON_ID("fmso_clk", &div6_clks[DIV6_FMSO]),
+	CLKDEV_CON_ID("fsi_clk", &div6_clks[DIV6_FSI]),
+	CLKDEV_CON_ID("sub_clk", &div6_clks[DIV6_SUB]),
+	CLKDEV_CON_ID("spu_clk", &div6_clks[DIV6_SPU]),
+	CLKDEV_CON_ID("msu_clk", &div6_clks[DIV6_MSU]),
+	CLKDEV_CON_ID("mvi3_clk", &div6_clks[DIV6_MVI3]),
+	CLKDEV_CON_ID("hdmi_clk", &div6_clks[DIV6_HDMI]),
+	CLKDEV_CON_ID("mf1_clk", &div6_clks[DIV6_MF1]),
+	CLKDEV_CON_ID("mf2_clk", &div6_clks[DIV6_MF2]),
+	CLKDEV_CON_ID("dsit_clk", &div6_clks[DIV6_DSIT]),
+	CLKDEV_CON_ID("dsip_clk", &div6_clks[DIV6_DSIP]),
+
+	/* MSTP32 clocks */
+	CLKDEV_DEV_ID("i2c-sh_mobile.2", &mstp_clks[MSTP001]), /* IIC2 */
+	CLKDEV_DEV_ID("uio_pdrv_genirq.4", &mstp_clks[MSTP131]), /* VEU3 */
+	CLKDEV_DEV_ID("uio_pdrv_genirq.3", &mstp_clks[MSTP130]), /* VEU2 */
+	CLKDEV_DEV_ID("uio_pdrv_genirq.2", &mstp_clks[MSTP129]), /* VEU1 */
+	CLKDEV_DEV_ID("uio_pdrv_genirq.1", &mstp_clks[MSTP128]), /* VEU0 */
+	CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[MSTP116]), /* IIC0 */
+	CLKDEV_DEV_ID("uio_pdrv_genirq.5", &mstp_clks[MSTP106]), /* JPU */
+	CLKDEV_DEV_ID("uio_pdrv_genirq.0", &mstp_clks[MSTP101]), /* VPU */
+	CLKDEV_DEV_ID("uio_pdrv_genirq.6", &mstp_clks[MSTP223]), /* SPU2DSP0 */
+	CLKDEV_DEV_ID("uio_pdrv_genirq.7", &mstp_clks[MSTP223]), /* SPU2DSP1 */
+	CLKDEV_DEV_ID("sh-sci.5", &mstp_clks[MSTP207]), /* SCIFA5 */
+	CLKDEV_DEV_ID("sh-sci.7", &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_CON_ID("cmt1", &mstp_clks[MSTP329]), /* CMT10 */
+	CLKDEV_DEV_ID("sh_irda", &mstp_clks[MSTP325]), /* IRDA */
+	CLKDEV_DEV_ID("i2c-sh_mobile.1", &mstp_clks[MSTP323]), /* IIC1 */
+	CLKDEV_DEV_ID("r8a66597_hcd.0", &mstp_clks[MSTP322]), /* USBHS */
+	CLKDEV_DEV_ID("r8a66597_udc.0", &mstp_clks[MSTP322]), /* USBHS */
+	CLKDEV_DEV_ID("sh_flctl", &mstp_clks[MSTP315]), /* FLCTL */
+	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_keysc.0", &mstp_clks[MSTP403]), /* KEYSC */
+};
+
+void __init sh7377_clock_init(void)
+{
+	int k, ret = 0;
+
+	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 sh7377 clocks\n");
+}

arch/arm/mach-shmobile/include/mach/common.h

···
 extern void sh7377_init_irq(void);
 extern void sh7377_add_early_devices(void);
 extern void sh7377_add_standard_devices(void);
+extern void sh7377_clock_init(void);
 extern void sh7377_pinmux_init(void);
+extern struct clk sh7377_extalc1_clk;
+extern struct clk sh7377_extal2_clk;
 
 extern void sh7372_init_irq(void);
 extern void sh7372_add_early_devices(void);