powerpc/4xx: Create 4xx pseudo-platform in platforms/4xx

We have a lot of code in sysdev for supporting 4xx, ie. either 40x or
44x. Instead it would be cleaner if it was all in platforms/4xx.

This is slightly odd in that we don't actually define any machines in
the 4xx platform, as is usual for a platform directory. But still it
seems like a better result to have all this related code in a directory
by itself.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 0 insertions, 346 deletions

diff --git a/arch/powerpc/sysdev/ppc4xx_cpm.c b/arch/powerpc/sysdev/ppc4xx_cpm.c
deleted file mode 100644
index ba95adf81d8d..000000000000
--- a/arch/powerpc/sysdev/ppc4xx_cpm.c
+++ /dev/null
@@ -1,346 +0,0 @@
-/*
- * PowerPC 4xx Clock and Power Management
- *
- * Copyright (C) 2010, Applied Micro Circuits Corporation
- * Victor Gallardo (vgallardo@apm.com)
- *
- * Based on arch/powerpc/platforms/44x/idle.c:
- * Jerone Young <jyoung5@us.ibm.com>
- * Copyright 2008 IBM Corp.
- *
- * Based on arch/powerpc/sysdev/fsl_pmc.c:
- * Anton Vorontsov <avorontsov@ru.mvista.com>
- * Copyright 2009  MontaVista Software, Inc.
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * 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.
- *
- * 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/kernel.h>
-#include <linux/of_platform.h>
-#include <linux/sysfs.h>
-#include <linux/cpu.h>
-#include <linux/suspend.h>
-#include <asm/dcr.h>
-#include <asm/dcr-native.h>
-#include <asm/machdep.h>
-
-#define CPM_ER	0
-#define CPM_FR	1
-#define CPM_SR	2
-
-#define CPM_IDLE_WAIT	0
-#define CPM_IDLE_DOZE	1
-
-struct cpm {
-	dcr_host_t	dcr_host;
-	unsigned int	dcr_offset[3];
-	unsigned int	powersave_off;
-	unsigned int	unused;
-	unsigned int	idle_doze;
-	unsigned int	standby;
-	unsigned int	suspend;
-};
-
-static struct cpm cpm;
-
-struct cpm_idle_mode {
-	unsigned int enabled;
-	const char  *name;
-};
-
-static struct cpm_idle_mode idle_mode[] = {
-	[CPM_IDLE_WAIT] = { 1, "wait" }, /* default */
-	[CPM_IDLE_DOZE] = { 0, "doze" },
-};
-
-static unsigned int cpm_set(unsigned int cpm_reg, unsigned int mask)
-{
-	unsigned int value;
-
-	/* CPM controller supports 3 different types of sleep interface
-	 * known as class 1, 2 and 3. For class 1 units, they are
-	 * unconditionally put to sleep when the corresponding CPM bit is
-	 * set. For class 2 and 3 units this is not case; if they can be
-	 * put to to sleep, they will. Here we do not verify, we just
-	 * set them and expect them to eventually go off when they can.
-	 */
-	value = dcr_read(cpm.dcr_host, cpm.dcr_offset[cpm_reg]);
-	dcr_write(cpm.dcr_host, cpm.dcr_offset[cpm_reg], value | mask);
-
-	/* return old state, to restore later if needed */
-	return value;
-}
-
-static void cpm_idle_wait(void)
-{
-	unsigned long msr_save;
-
-	/* save off initial state */
-	msr_save = mfmsr();
-	/* sync required when CPM0_ER[CPU] is set */
-	mb();
-	/* set wait state MSR */
-	mtmsr(msr_save|MSR_WE|MSR_EE|MSR_CE|MSR_DE);
-	isync();
-	/* return to initial state */
-	mtmsr(msr_save);
-	isync();
-}
-
-static void cpm_idle_sleep(unsigned int mask)
-{
-	unsigned int er_save;
-
-	/* update CPM_ER state */
-	er_save = cpm_set(CPM_ER, mask);
-
-	/* go to wait state so that CPM0_ER[CPU] can take effect */
-	cpm_idle_wait();
-
-	/* restore CPM_ER state */
-	dcr_write(cpm.dcr_host, cpm.dcr_offset[CPM_ER], er_save);
-}
-
-static void cpm_idle_doze(void)
-{
-	cpm_idle_sleep(cpm.idle_doze);
-}
-
-static void cpm_idle_config(int mode)
-{
-	int i;
-
-	if (idle_mode[mode].enabled)
-		return;
-
-	for (i = 0; i < ARRAY_SIZE(idle_mode); i++)
-		idle_mode[i].enabled = 0;
-
-	idle_mode[mode].enabled = 1;
-}
-
-static ssize_t cpm_idle_show(struct kobject *kobj,
-			     struct kobj_attribute *attr, char *buf)
-{
-	char *s = buf;
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(idle_mode); i++) {
-		if (idle_mode[i].enabled)
-			s += sprintf(s, "[%s] ", idle_mode[i].name);
-		else
-			s += sprintf(s, "%s ", idle_mode[i].name);
-	}
-
-	*(s-1) = '\n'; /* convert the last space to a newline */
-
-	return s - buf;
-}
-
-static ssize_t cpm_idle_store(struct kobject *kobj,
-			      struct kobj_attribute *attr,
-			      const char *buf, size_t n)
-{
-	int i;
-	char *p;
-	int len;
-
-	p = memchr(buf, '\n', n);
-	len = p ? p - buf : n;
-
-	for (i = 0; i < ARRAY_SIZE(idle_mode); i++) {
-		if (strncmp(buf, idle_mode[i].name, len) == 0) {
-			cpm_idle_config(i);
-			return n;
-		}
-	}
-
-	return -EINVAL;
-}
-
-static struct kobj_attribute cpm_idle_attr =
-	__ATTR(idle, 0644, cpm_idle_show, cpm_idle_store);
-
-static void cpm_idle_config_sysfs(void)
-{
-	struct device *dev;
-	unsigned long ret;
-
-	dev = get_cpu_device(0);
-
-	ret = sysfs_create_file(&dev->kobj,
-				&cpm_idle_attr.attr);
-	if (ret)
-		printk(KERN_WARNING
-		       "cpm: failed to create idle sysfs entry\n");
-}
-
-static void cpm_idle(void)
-{
-	if (idle_mode[CPM_IDLE_DOZE].enabled)
-		cpm_idle_doze();
-	else
-		cpm_idle_wait();
-}
-
-static int cpm_suspend_valid(suspend_state_t state)
-{
-	switch (state) {
-	case PM_SUSPEND_STANDBY:
-		return !!cpm.standby;
-	case PM_SUSPEND_MEM:
-		return !!cpm.suspend;
-	default:
-		return 0;
-	}
-}
-
-static void cpm_suspend_standby(unsigned int mask)
-{
-	unsigned long tcr_save;
-
-	/* disable decrement interrupt */
-	tcr_save = mfspr(SPRN_TCR);
-	mtspr(SPRN_TCR, tcr_save & ~TCR_DIE);
-
-	/* go to sleep state */
-	cpm_idle_sleep(mask);
-
-	/* restore decrement interrupt */
-	mtspr(SPRN_TCR, tcr_save);
-}
-
-static int cpm_suspend_enter(suspend_state_t state)
-{
-	switch (state) {
-	case PM_SUSPEND_STANDBY:
-		cpm_suspend_standby(cpm.standby);
-		break;
-	case PM_SUSPEND_MEM:
-		cpm_suspend_standby(cpm.suspend);
-		break;
-	}
-
-	return 0;
-}
-
-static struct platform_suspend_ops cpm_suspend_ops = {
-	.valid		= cpm_suspend_valid,
-	.enter		= cpm_suspend_enter,
-};
-
-static int cpm_get_uint_property(struct device_node *np,
-				 const char *name)
-{
-	int len;
-	const unsigned int *prop = of_get_property(np, name, &len);
-
-	if (prop == NULL || len < sizeof(u32))
-		return 0;
-
-	return *prop;
-}
-
-static int __init cpm_init(void)
-{
-	struct device_node *np;
-	int dcr_base, dcr_len;
-	int ret = 0;
-
-	if (!cpm.powersave_off) {
-		cpm_idle_config(CPM_IDLE_WAIT);
-		ppc_md.power_save = &cpm_idle;
-	}
-
-	np = of_find_compatible_node(NULL, NULL, "ibm,cpm");
-	if (!np) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	dcr_base = dcr_resource_start(np, 0);
-	dcr_len = dcr_resource_len(np, 0);
-
-	if (dcr_base == 0 || dcr_len == 0) {
-		printk(KERN_ERR "cpm: could not parse dcr property for %s\n",
-		       np->full_name);
-		ret = -EINVAL;
-		goto node_put;
-	}
-
-	cpm.dcr_host = dcr_map(np, dcr_base, dcr_len);
-
-	if (!DCR_MAP_OK(cpm.dcr_host)) {
-		printk(KERN_ERR "cpm: failed to map dcr property for %s\n",
-		       np->full_name);
-		ret = -EINVAL;
-		goto node_put;
-	}
-
-	/* All 4xx SoCs with a CPM controller have one of two
-	 * different order for the CPM registers. Some have the
-	 * CPM registers in the following order (ER,FR,SR). The
-	 * others have them in the following order (SR,ER,FR).
-	 */
-
-	if (cpm_get_uint_property(np, "er-offset") == 0) {
-		cpm.dcr_offset[CPM_ER] = 0;
-		cpm.dcr_offset[CPM_FR] = 1;
-		cpm.dcr_offset[CPM_SR] = 2;
-	} else {
-		cpm.dcr_offset[CPM_ER] = 1;
-		cpm.dcr_offset[CPM_FR] = 2;
-		cpm.dcr_offset[CPM_SR] = 0;
-	}
-
-	/* Now let's see what IPs to turn off for the following modes */
-
-	cpm.unused = cpm_get_uint_property(np, "unused-units");
-	cpm.idle_doze = cpm_get_uint_property(np, "idle-doze");
-	cpm.standby = cpm_get_uint_property(np, "standby");
-	cpm.suspend = cpm_get_uint_property(np, "suspend");
-
-	/* If some IPs are unused let's turn them off now */
-
-	if (cpm.unused) {
-		cpm_set(CPM_ER, cpm.unused);
-		cpm_set(CPM_FR, cpm.unused);
-	}
-
-	/* Now let's export interfaces */
-
-	if (!cpm.powersave_off && cpm.idle_doze)
-		cpm_idle_config_sysfs();
-
-	if (cpm.standby || cpm.suspend)
-		suspend_set_ops(&cpm_suspend_ops);
-node_put:
-	of_node_put(np);
-out:
-	return ret;
-}
-
-late_initcall(cpm_init);
-
-static int __init cpm_powersave_off(char *arg)
-{
-	cpm.powersave_off = 1;
-	return 0;
-}
-__setup("powersave=off", cpm_powersave_off);