Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758244Ab1D1X4J (ORCPT ); Thu, 28 Apr 2011 19:56:09 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:33828 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758169Ab1D1Xzy (ORCPT ); Thu, 28 Apr 2011 19:55:54 -0400 From: "Rafael J. Wysocki" To: Linux PM mailing list Subject: [RFC][PATCH 2/2] ARM / shmobile: Support for I/O power domains for SH7372 Date: Fri, 29 Apr 2011 01:55:41 +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 References: <201104290154.12966.rjw@sisk.pl> In-Reply-To: <201104290154.12966.rjw@sisk.pl> MIME-Version: 1.0 Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <201104290155.41434.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5528 Lines: 182 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 | 98 +++++++++++++++++++++++++++ 4 files changed, 121 insertions(+) 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 @@ -1211,6 +1211,9 @@ static void __init mackerel_init(void) i2c_register_board_info(1, i2c1_devices, ARRAY_SIZE(i2c1_devices)); + sh7372_add_device_to_domain(SH7372_A4LC, &lcdc_device); + sh7372_add_device_to_domain(SH7372_A4LC, &hdmi_lcdc_device); + sh7372_add_standard_devices(); platform_add_devices(mackerel_devices, ARRAY_SIZE(mackerel_devices)); 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 +1,98 @@ +/* + * 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_info("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_info("sh7372 power domain up 0x%08x -> PSTR = 0x%08x\n", + mask, __raw_readl(PSTR)); + } + + return 0; +} + +static struct sh7372_domain_data sh7372_a4lc_domain_data = { + .bit_shift = 1, +}; + +struct generic_power_domain sh7372_a4lc_domain = { + .domain.ops = { USE_PLATFORM_PM_SLEEP_OPS }, + .domain.platform_data = &sh7372_a4lc_domain_data, +}; + +static void sh7372_init_domain(struct generic_power_domain *domain) +{ + pm_genpd_init(domain, NULL, false); + 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 int __init sh7372_power_domains_init(void) +{ + sh7372_init_domain(&sh7372_a4lc_domain); + 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 @@ -37,6 +37,10 @@ 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) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/