OMAP3: PM: Adding smartreflex device file. (0c0a5d61) · Commits · 戴 / test

arch/arm/mach-omap2/Makefile

+1 −1

Original line number	Diff line number	Diff line
		@@ -62,7 +62,7 @@ obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o voltage.o \
		cpuidle34xx.o pm_bus.o
		obj-$(CONFIG_ARCH_OMAP4) += pm44xx.o pm_bus.o
		obj-$(CONFIG_PM_DEBUG) += pm-debug.o
		obj-$(CONFIG_OMAP_SMARTREFLEX) += smartreflex.o
		obj-$(CONFIG_OMAP_SMARTREFLEX) += sr_device.o smartreflex.o

		AFLAGS_sleep24xx.o :=-Wa,-march=armv6
		AFLAGS_sleep34xx.o :=-Wa,-march=armv7-a

arch/arm/mach-omap2/pm.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -21,6 +21,7 @@

		#include "powerdomain.h"
		#include "clockdomain.h"
		#include "pm.h"

		static struct omap_device_pm_latency *pm_lats;

		@@ -167,6 +168,7 @@ postcore_initcall(omap2_common_pm_init);
		static int __init omap2_common_pm_late_init(void)
		{
		omap_voltage_late_init();
		omap_devinit_smartreflex();

		return 0;
		}

arch/arm/mach-omap2/pm.h

+14 −0

Original line number	Diff line number	Diff line
		@@ -11,6 +11,8 @@
		#ifndef __ARCH_ARM_MACH_OMAP2_PM_H
		#define __ARCH_ARM_MACH_OMAP2_PM_H

		#include <linux/err.h>

		#include "powerdomain.h"

		extern void *omap3_secure_ram_storage;
		@@ -110,4 +112,16 @@ extern void enable_omap3630_toggle_l2_on_restore(void);
		static inline void enable_omap3630_toggle_l2_on_restore(void) { }
		#endif /* defined(CONFIG_PM) && defined(CONFIG_ARCH_OMAP3) */

		#ifdef CONFIG_OMAP_SMARTREFLEX
		extern int omap_devinit_smartreflex(void);
		extern void omap_enable_smartreflex_on_init(void);
		#else
		static inline int omap_devinit_smartreflex(void)
		{
		return -EINVAL;
		}

		static inline void omap_enable_smartreflex_on_init(void) {}
		#endif

		#endif

arch/arm/mach-omap2/sr_device.c

0 → 100644

+131 −0

Original line number	Diff line number	Diff line
		/*
		* OMAP3/OMAP4 smartreflex device file
		*
		* Author: Thara Gopinath <thara@ti.com>
		*
		* Based originally on code from smartreflex.c
		* Copyright (C) 2010 Texas Instruments, Inc.
		* Thara Gopinath <thara@ti.com>
		*
		* Copyright (C) 2008 Nokia Corporation
		* Kalle Jokiniemi
		*
		* Copyright (C) 2007 Texas Instruments, Inc.
		* Lesly A M <x0080970@ti.com>
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 as
		* published by the Free Software Foundation.
		*/

		#include <linux/err.h>
		#include <linux/slab.h>

		#include <plat/omap_device.h>
		#include <plat/smartreflex.h>
		#include <plat/voltage.h>

		#include "control.h"

		static bool sr_enable_on_init;

		static struct omap_device_pm_latency omap_sr_latency[] = {
		{
		.deactivate_func = omap_device_idle_hwmods,
		.activate_func = omap_device_enable_hwmods,
		.flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST
		},
		};

		/* Read EFUSE values from control registers for OMAP3430 */
		static void __init sr_set_nvalues(struct omap_volt_data *volt_data,
		struct omap_sr_data *sr_data)
		{
		struct omap_sr_nvalue_table *nvalue_table;
		int i, count = 0;

		while (volt_data[count].volt_nominal)
		count++;

		nvalue_table = kzalloc(sizeof(struct omap_sr_nvalue_table)*count,
		GFP_KERNEL);

		for (i = 0; i < count; i++) {
		u32 v = omap_ctrl_readl(volt_data[i].sr_efuse_offs);

		nvalue_table[i].efuse_offs = volt_data[i].sr_efuse_offs;
		nvalue_table[i].nvalue = v;
		}

		sr_data->nvalue_table = nvalue_table;
		sr_data->nvalue_count = count;
		}

		static int sr_dev_init(struct omap_hwmod oh, void user)
		{
		struct omap_sr_data *sr_data;
		struct omap_device *od;
		struct omap_volt_data *volt_data;
		char *name = "smartreflex";
		static int i;

		sr_data = kzalloc(sizeof(struct omap_sr_data), GFP_KERNEL);
		if (!sr_data) {
		pr_err("%s: Unable to allocate memory for %s sr_data.Error!\n",
		__func__, oh->name);
		return -ENOMEM;
		}

		if (!oh->vdd_name) {
		pr_err("%s: No voltage domain specified for %s."
		"Cannot initialize\n", __func__, oh->name);
		goto exit;
		}

		sr_data->ip_type = oh->class->rev;
		sr_data->senn_mod = 0x1;
		sr_data->senp_mod = 0x1;

		sr_data->voltdm = omap_voltage_domain_lookup(oh->vdd_name);
		if (IS_ERR(sr_data->voltdm)) {
		pr_err("%s: Unable to get voltage domain pointer for VDD %s\n",
		__func__, oh->vdd_name);
		goto exit;
		}

		omap_voltage_get_volttable(sr_data->voltdm, &volt_data);
		if (!volt_data) {
		pr_warning("%s: No Voltage table registerd fo VDD%d."
		"Something really wrong\n\n", __func__, i + 1);
		goto exit;
		}

		sr_set_nvalues(volt_data, sr_data);

		sr_data->enable_on_init = sr_enable_on_init;

		od = omap_device_build(name, i, oh, sr_data, sizeof(*sr_data),
		omap_sr_latency,
		ARRAY_SIZE(omap_sr_latency), 0);
		if (IS_ERR(od))
		pr_warning("%s: Could not build omap_device for %s: %s.\n\n",
		__func__, name, oh->name);
		exit:
		i++;
		kfree(sr_data);
		return 0;
		}

		/*
		* API to be called from board files to enable smartreflex
		* autocompensation at init.
		*/
		void __init omap_enable_smartreflex_on_init(void)
		{
		sr_enable_on_init = true;
		}

		int __init omap_devinit_smartreflex(void)
		{
		return omap_hwmod_for_each_by_class("smartreflex", sr_dev_init, NULL);
		}

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