From patchwork Sun May 8 21:25:01 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rafael Wysocki X-Patchwork-Id: 766642 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter2.kernel.org (8.14.4/8.14.3) with ESMTP id p48LR3ow019299 for ; Sun, 8 May 2011 21:27:04 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754372Ab1EHV0d (ORCPT ); Sun, 8 May 2011 17:26:33 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:59279 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753315Ab1EHVZn (ORCPT ); Sun, 8 May 2011 17:25:43 -0400 Received: from localhost (localhost.localdomain [127.0.0.1]) by ogre.sisk.pl (Postfix) with ESMTP id 8089B1AE4F7; Sun, 8 May 2011 23:19:31 +0200 (CEST) Received: from ogre.sisk.pl ([127.0.0.1]) by localhost (ogre.sisk.pl [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 28077-05; Sun, 8 May 2011 23:19:00 +0200 (CEST) Received: from ferrari.rjw.lan (220-bem-13.acn.waw.pl [82.210.184.220]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ogre.sisk.pl (Postfix) with ESMTP id 4A8D01AE793; Sun, 8 May 2011 23:19:00 +0200 (CEST) From: "Rafael J. Wysocki" To: Linux PM mailing list Subject: [PATCH 4/5] ARM / shmobile: Support for I/O power domains for SH7372 (v4) Date: Sun, 8 May 2011 23:25:01 +0200 User-Agent: KMail/1.13.6 (Linux/2.6.39-rc5+; KDE/4.6.0; x86_64; ; ) Cc: Greg KH , LKML , Kevin Hilman , Grant Likely , Magnus Damm , linux-sh@vger.kernel.org, MyungJoo Ham , Guennadi Liakhovetski References: <201104290154.12966.rjw@sisk.pl> <201105082320.57185.rjw@sisk.pl> In-Reply-To: <201105082320.57185.rjw@sisk.pl> MIME-Version: 1.0 Message-Id: <201105082325.02212.rjw@sisk.pl> X-Virus-Scanned: amavisd-new at ogre.sisk.pl using MkS_Vir for Linux Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Sun, 08 May 2011 21:27:04 +0000 (UTC) From: Rafael J. Wysocki Use the generic power domains support introduced by the previous patch to implement support for power domains on SH7372. Signed-off-by: Rafael J. Wysocki --- arch/arm/mach-shmobile/Makefile | 4 + arch/arm/mach-shmobile/board-mackerel.c | 3 arch/arm/mach-shmobile/include/mach/sh7372.h | 16 ++++ arch/arm/mach-shmobile/pm-sh7372.c | 97 +++++++++++++++++++++++++++ 4 files changed, 120 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe linux-sh" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Index: linux-2.6/arch/arm/mach-shmobile/board-mackerel.c =================================================================== --- linux-2.6.orig/arch/arm/mach-shmobile/board-mackerel.c +++ linux-2.6/arch/arm/mach-shmobile/board-mackerel.c @@ -1215,6 +1215,9 @@ static void __init mackerel_init(void) platform_add_devices(mackerel_devices, ARRAY_SIZE(mackerel_devices)); + sh7372_add_device_to_domain(SH7372_A4LC, &lcdc_device); + sh7372_add_device_to_domain(SH7372_A4LC, &hdmi_lcdc_device); + hdmi_init_pm_clock(); } Index: linux-2.6/arch/arm/mach-shmobile/pm-sh7372.c =================================================================== --- /dev/null +++ linux-2.6/arch/arm/mach-shmobile/pm-sh7372.c @@ -0,0 +1,97 @@ +/* + * arch/arm/mach-shmobile/pm-sh7372.c + * + * Power domains support code for SH7372 + * + * Copyright (C) 2011 Rafael J. Wysocki , Renesas Electronics Corp. + * + * This file is subject to the terms and conditions of the GNU General Public + * License v2. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include +#include +#include +#include +#include + +#include + +struct sh7372_domain_data { + unsigned int bit_shift; +}; + +#define SPDCR 0xe6180008 +#define SWUCR 0xe6180014 +#define PSTR 0xe6180080 + +static int pd_power_down(struct dev_power_domain *domain) +{ + struct sh7372_domain_data *dd = domain->platform_data; + unsigned int mask = 1 << dd->bit_shift; + + if (__raw_readl(PSTR) & mask) { + __raw_writel(mask, SPDCR); + + while (__raw_readl(SPDCR) & mask) {} + + pr_debug("sh7372 power domain down 0x%08x -> PSTR = 0x%08x\n", + mask, __raw_readl(PSTR)); + } + + return 0; +} + +static int pd_power_up(struct dev_power_domain *domain) +{ + struct sh7372_domain_data *dd = domain->platform_data; + unsigned int mask = 1 << dd->bit_shift; + + if (!(__raw_readl(PSTR) & mask)) { + __raw_writel(mask, SWUCR); + + while (__raw_readl(SWUCR) & mask) {} + + pr_debug("sh7372 power domain up 0x%08x -> PSTR = 0x%08x\n", + mask, __raw_readl(PSTR)); + } + + return 0; +} + +static void sh7372_init_domain(struct generic_power_domain *domain, + struct sh7372_domain_data *pdata) +{ + pm_genpd_init(domain, NULL, false); + domain->domain.platform_data = pdata; + domain->stop_device = pm_runtime_clk_suspend; + domain->start_device = pm_runtime_clk_resume; + domain->power_off = pd_power_down; + domain->power_on = pd_power_up; +} + +void sh7372_add_device_to_domain(struct generic_power_domain *domain, + struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + + if (!dev->power.subsys_data) { + pm_runtime_clk_init(dev); + pm_runtime_clk_add(dev, NULL); + } + pm_genpd_add_device(domain, dev); +} + +static struct sh7372_domain_data sh7372_a4lc_domain_data = { + .bit_shift = 1, +}; + +struct generic_power_domain sh7372_a4lc_domain; + +static int __init sh7372_power_domains_init(void) +{ + sh7372_init_domain(&sh7372_a4lc_domain, &sh7372_a4lc_domain_data); + return 0; +} +core_initcall(sh7372_power_domains_init); Index: linux-2.6/arch/arm/mach-shmobile/include/mach/sh7372.h =================================================================== --- linux-2.6.orig/arch/arm/mach-shmobile/include/mach/sh7372.h +++ linux-2.6/arch/arm/mach-shmobile/include/mach/sh7372.h @@ -12,6 +12,7 @@ #define __ASM_SH7372_H__ #include +#include /* * Pin Function Controller: @@ -469,4 +470,19 @@ extern struct clk sh7372_fsibck_clk; extern struct clk sh7372_fsidiva_clk; extern struct clk sh7372_fsidivb_clk; +struct platform_device; + +#ifdef CONFIG_PM +extern struct generic_power_domain sh7372_a4lc_domain; +#define SH7372_A4LC (&sh7372_a4lc_domain) + +extern void sh7372_add_device_to_domain(struct generic_power_domain *domain, + struct platform_device *pdev); +#else +#define SH7372_A4LC NULL + +static inline void sh7372_add_device_to_domain(struct generic_power_domain *dom, + struct platform_device *pd) {} +#endif /* CONFIG_PM */ + #endif /* __ASM_SH7372_H__ */ Index: linux-2.6/arch/arm/mach-shmobile/Makefile =================================================================== --- linux-2.6.orig/arch/arm/mach-shmobile/Makefile +++ linux-2.6/arch/arm/mach-shmobile/Makefile @@ -40,6 +40,10 @@ obj-$(CONFIG_MACH_AP4EVB) += board-ap4ev obj-$(CONFIG_MACH_AG5EVM) += board-ag5evm.o obj-$(CONFIG_MACH_MACKEREL) += board-mackerel.o +# PM objects +pm-$(CONFIG_ARCH_SH7372) += pm-sh7372.o + # Framework support obj-$(CONFIG_SMP) += $(smp-y) obj-$(CONFIG_GENERIC_GPIO) += $(pfc-y) +obj-$(CONFIG_PM) += $(pm-y)