sh: Remove unused SH4-202 support

This early prototype of the SH4 CPU was only used in the "microdev" board
that is now removed, so all of the SH4-202 supoprt can also be removed.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Link: https://lore.kernel.org/r/20230914155523.3839811-2-arnd@kernel.orgSigned-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>

arch/sh/Kconfig

@@ -383,10 +383,6 @@ config CPU_SUBTYPE_SH7760
 	bool "Support SH7760 processor"
 	select CPU_SH4
 
-config CPU_SUBTYPE_SH4_202
-	bool "Support SH4-202 processor"
-	select CPU_SH4
-
 # SH-4A Processor Support
 
 config CPU_SUBTYPE_SH7723
@@ -517,7 +513,6 @@ config SH_PCLK_FREQ
 			      CPU_SUBTYPE_SH7263 || \
 			      CPU_SUBTYPE_MXG
 	default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
-	default "66000000" if CPU_SUBTYPE_SH4_202
 	default "50000000"
 	help
 	  This option is used to specify the peripheral clock frequency.

arch/sh/kernel/cpu/sh4/Makefile

@@ -23,15 +23,11 @@ obj-$(CONFIG_CPU_SUBTYPE_SH7091)	+= setup-sh7750.o
 obj-$(CONFIG_CPU_SUBTYPE_SH7751)	+= setup-sh7750.o
 obj-$(CONFIG_CPU_SUBTYPE_SH7751R)	+= setup-sh7750.o
 obj-$(CONFIG_CPU_SUBTYPE_SH7760)	+= setup-sh7760.o
-obj-$(CONFIG_CPU_SUBTYPE_SH4_202)	+= setup-sh4-202.o
 
 # Primary on-chip clocks (common)
 ifndef CONFIG_CPU_SH4A
 clock-$(CONFIG_CPU_SH4)			:= clock-sh4.o
 endif
 
-# Additional clocks by subtype
-clock-$(CONFIG_CPU_SUBTYPE_SH4_202)	+= clock-sh4-202.o
-
 obj-y					+= $(clock-y)
 obj-$(CONFIG_PERF_EVENTS)		+= $(perf-y)

arch/sh/kernel/cpu/sh4/clock-sh4-202.c

-// SPDX-License-Identifier: GPL-2.0
-/*
- * arch/sh/kernel/cpu/sh4/clock-sh4-202.c
- *
- * Additional SH4-202 support for the clock framework
- *
- *  Copyright (C) 2005  Paul Mundt
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/clkdev.h>
-#include <asm/clock.h>
-#include <asm/freq.h>
-
-#define CPG2_FRQCR3	0xfe0a0018
-
-static int frqcr3_divisors[] = { 1, 2, 3, 4, 6, 8, 16 };
-static int frqcr3_values[]   = { 0, 1, 2, 3, 4, 5, 6  };
-
-static unsigned long emi_clk_recalc(struct clk *clk)
-{
-	int idx = __raw_readl(CPG2_FRQCR3) & 0x0007;
-	return clk->parent->rate / frqcr3_divisors[idx];
-}
-
-static inline int frqcr3_lookup(struct clk *clk, unsigned long rate)
-{
-	int divisor = clk->parent->rate / rate;
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(frqcr3_divisors); i++)
-		if (frqcr3_divisors[i] == divisor)
-			return frqcr3_values[i];
-
-	/* Safe fallback */
-	return 5;
-}
-
-static struct sh_clk_ops sh4202_emi_clk_ops = {
-	.recalc		= emi_clk_recalc,
-};
-
-static struct clk sh4202_emi_clk = {
-	.flags		= CLK_ENABLE_ON_INIT,
-	.ops		= &sh4202_emi_clk_ops,
-};
-
-static unsigned long femi_clk_recalc(struct clk *clk)
-{
-	int idx = (__raw_readl(CPG2_FRQCR3) >> 3) & 0x0007;
-	return clk->parent->rate / frqcr3_divisors[idx];
-}
-
-static struct sh_clk_ops sh4202_femi_clk_ops = {
-	.recalc		= femi_clk_recalc,
-};
-
-static struct clk sh4202_femi_clk = {
-	.flags		= CLK_ENABLE_ON_INIT,
-	.ops		= &sh4202_femi_clk_ops,
-};
-
-static void shoc_clk_init(struct clk *clk)
-{
-	int i;
-
-	/*
-	 * For some reason, the shoc_clk seems to be set to some really
-	 * insane value at boot (values outside of the allowable frequency
-	 * range for instance). We deal with this by scaling it back down
-	 * to something sensible just in case.
-	 *
-	 * Start scaling from the high end down until we find something
-	 * that passes rate verification..
-	 */
-	for (i = 0; i < ARRAY_SIZE(frqcr3_divisors); i++) {
-		int divisor = frqcr3_divisors[i];
-
-		if (clk->ops->set_rate(clk, clk->parent->rate / divisor) == 0)
-			break;
-	}
-
-	WARN_ON(i == ARRAY_SIZE(frqcr3_divisors));	/* Undefined clock */
-}
-
-static unsigned long shoc_clk_recalc(struct clk *clk)
-{
-	int idx = (__raw_readl(CPG2_FRQCR3) >> 6) & 0x0007;
-	return clk->parent->rate / frqcr3_divisors[idx];
-}
-
-static int shoc_clk_verify_rate(struct clk *clk, unsigned long rate)
-{
-	struct clk *bclk = clk_get(NULL, "bus_clk");
-	unsigned long bclk_rate = clk_get_rate(bclk);
-
-	clk_put(bclk);
-
-	if (rate > bclk_rate)
-		return 1;
-	if (rate > 66000000)
-		return 1;
-
-	return 0;
-}
-
-static int shoc_clk_set_rate(struct clk *clk, unsigned long rate)
-{
-	unsigned long frqcr3;
-	unsigned int tmp;
-
-	/* Make sure we have something sensible to switch to */
-	if (shoc_clk_verify_rate(clk, rate) != 0)
-		return -EINVAL;
-
-	tmp = frqcr3_lookup(clk, rate);
-
-	frqcr3 = __raw_readl(CPG2_FRQCR3);
-	frqcr3 &= ~(0x0007 << 6);
-	frqcr3 |= tmp << 6;
-	__raw_writel(frqcr3, CPG2_FRQCR3);
-
-	clk->rate = clk->parent->rate / frqcr3_divisors[tmp];
-
-	return 0;
-}
-
-static struct sh_clk_ops sh4202_shoc_clk_ops = {
-	.init		= shoc_clk_init,
-	.recalc		= shoc_clk_recalc,
-	.set_rate	= shoc_clk_set_rate,
-};
-
-static struct clk sh4202_shoc_clk = {
-	.flags		= CLK_ENABLE_ON_INIT,
-	.ops		= &sh4202_shoc_clk_ops,
-};
-
-static struct clk *sh4202_onchip_clocks[] = {
-	&sh4202_emi_clk,
-	&sh4202_femi_clk,
-	&sh4202_shoc_clk,
-};
-
-static struct clk_lookup lookups[] = {
-	/* main clocks */
-	CLKDEV_CON_ID("emi_clk", &sh4202_emi_clk),
-	CLKDEV_CON_ID("femi_clk", &sh4202_femi_clk),
-	CLKDEV_CON_ID("shoc_clk", &sh4202_shoc_clk),
-};
-
-int __init arch_clk_init(void)
-{
-	struct clk *clk;
-	int i, ret = 0;
-
-	cpg_clk_init();
-
-	clk = clk_get(NULL, "master_clk");
-	for (i = 0; i < ARRAY_SIZE(sh4202_onchip_clocks); i++) {
-		struct clk *clkp = sh4202_onchip_clocks[i];
-
-		clkp->parent = clk;
-		ret |= clk_register(clkp);
-	}
-
-	clk_put(clk);
-
-	clkdev_add_table(lookups, ARRAY_SIZE(lookups));
-
-	return ret;
-}

arch/sh/kernel/cpu/sh4/setup-sh4-202.c

-// SPDX-License-Identifier: GPL-2.0
-/*
- * SH4-202 Setup
- *
- *  Copyright (C) 2006  Paul Mundt
- *  Copyright (C) 2009  Magnus Damm
- */
-#include <linux/platform_device.h>
-#include <linux/init.h>
-#include <linux/serial.h>
-#include <linux/serial_sci.h>
-#include <linux/sh_timer.h>
-#include <linux/sh_intc.h>
-#include <linux/io.h>
-#include <asm/platform_early.h>
-
-static struct plat_sci_port scif0_platform_data = {
-	.scscr		= SCSCR_REIE,
-	.type		= PORT_SCIF,
-};
-
-static struct resource scif0_resources[] = {
-	DEFINE_RES_MEM(0xffe80000, 0x100),
-	DEFINE_RES_IRQ(evt2irq(0x700)),
-	DEFINE_RES_IRQ(evt2irq(0x720)),
-	DEFINE_RES_IRQ(evt2irq(0x760)),
-	DEFINE_RES_IRQ(evt2irq(0x740)),
-};
-
-static struct platform_device scif0_device = {
-	.name		= "sh-sci",
-	.id		= 0,
-	.resource	= scif0_resources,
-	.num_resources	= ARRAY_SIZE(scif0_resources),
-	.dev		= {
-		.platform_data	= &scif0_platform_data,
-	},
-};
-
-static struct sh_timer_config tmu0_platform_data = {
-	.channels_mask = 7,
-};
-
-static struct resource tmu0_resources[] = {
-	DEFINE_RES_MEM(0xffd80000, 0x30),
-	DEFINE_RES_IRQ(evt2irq(0x400)),
-	DEFINE_RES_IRQ(evt2irq(0x420)),
-	DEFINE_RES_IRQ(evt2irq(0x440)),
-};
-
-static struct platform_device tmu0_device = {
-	.name		= "sh-tmu",
-	.id		= 0,
-	.dev = {
-		.platform_data	= &tmu0_platform_data,
-	},
-	.resource	= tmu0_resources,
-	.num_resources	= ARRAY_SIZE(tmu0_resources),
-};
-
-static struct platform_device *sh4202_devices[] __initdata = {
-	&scif0_device,
-	&tmu0_device,
-};
-
-static int __init sh4202_devices_setup(void)
-{
-	return platform_add_devices(sh4202_devices,
-				    ARRAY_SIZE(sh4202_devices));
-}
-arch_initcall(sh4202_devices_setup);
-
-static struct platform_device *sh4202_early_devices[] __initdata = {
-	&scif0_device,
-	&tmu0_device,
-};
-
-void __init plat_early_device_setup(void)
-{
-	sh_early_platform_add_devices(sh4202_early_devices,
-				   ARRAY_SIZE(sh4202_early_devices));
-}
-
-enum {
-	UNUSED = 0,
-
-	/* interrupt sources */
-	IRL0, IRL1, IRL2, IRL3, /* only IRLM mode supported */
-	HUDI, TMU0, TMU1, TMU2, RTC, SCIF, WDT,
-};
-
-static struct intc_vect vectors[] __initdata = {
-	INTC_VECT(HUDI, 0x600),
-	INTC_VECT(TMU0, 0x400), INTC_VECT(TMU1, 0x420),
-	INTC_VECT(TMU2, 0x440), INTC_VECT(TMU2, 0x460),
-	INTC_VECT(RTC, 0x480), INTC_VECT(RTC, 0x4a0),
-	INTC_VECT(RTC, 0x4c0),
-	INTC_VECT(SCIF, 0x700), INTC_VECT(SCIF, 0x720),
-	INTC_VECT(SCIF, 0x740), INTC_VECT(SCIF, 0x760),
-	INTC_VECT(WDT, 0x560),
-};
-
-static struct intc_prio_reg prio_registers[] __initdata = {
-	{ 0xffd00004, 0, 16, 4, /* IPRA */ { TMU0, TMU1, TMU2, RTC } },
-	{ 0xffd00008, 0, 16, 4, /* IPRB */ { WDT, 0, 0, 0 } },
-	{ 0xffd0000c, 0, 16, 4, /* IPRC */ { 0, 0, SCIF, HUDI } },
-	{ 0xffd00010, 0, 16, 4, /* IPRD */ { IRL0, IRL1, IRL2, IRL3 } },
-};
-
-static DECLARE_INTC_DESC(intc_desc, "sh4-202", vectors, NULL,
-			 NULL, prio_registers, NULL);
-
-static struct intc_vect vectors_irlm[] __initdata = {
-	INTC_VECT(IRL0, 0x240), INTC_VECT(IRL1, 0x2a0),
-	INTC_VECT(IRL2, 0x300), INTC_VECT(IRL3, 0x360),
-};
-
-static DECLARE_INTC_DESC(intc_desc_irlm, "sh4-202_irlm", vectors_irlm, NULL,
-			 NULL, prio_registers, NULL);
-
-void __init plat_irq_setup(void)
-{
-	register_intc_controller(&intc_desc);
-}
-
-#define INTC_ICR	0xffd00000UL
-#define INTC_ICR_IRLM   (1<<7)
-
-void __init plat_irq_setup_pins(int mode)
-{
-	switch (mode) {
-	case IRQ_MODE_IRQ: /* individual interrupt mode for IRL3-0 */
-		__raw_writew(__raw_readw(INTC_ICR) | INTC_ICR_IRLM, INTC_ICR);
-		register_intc_controller(&intc_desc_irlm);
-		break;
-	default:
-		BUG();
-	}
-}