Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754721AbaAKToz (ORCPT ); Sat, 11 Jan 2014 14:44:55 -0500 Received: from mail-ee0-f47.google.com ([74.125.83.47]:57358 "EHLO mail-ee0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753981AbaAKTnW (ORCPT ); Sat, 11 Jan 2014 14:43:22 -0500 From: Tomasz Figa To: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, Greg Kroah-Hartman , "Rafael J. Wysocki" , Pavel Machek , Len Brown , Russell King , Kukjin Kim , Kumar Gala , Ian Campbell , Mark Rutland , Pawel Moll , Rob Herring , Bartlomiej Zolnierkiewicz , Stephen Warren , Tomasz Figa , Tomasz Figa Subject: [PATCH RFC 06/10] ARM: s3c64xx: pm: Add device tree based power domain instantiation Date: Sat, 11 Jan 2014 20:42:48 +0100 Message-Id: <1389469372-17199-7-git-send-email-tomasz.figa@gmail.com> X-Mailer: git-send-email 1.8.5.2 In-Reply-To: <1389469372-17199-1-git-send-email-tomasz.figa@gmail.com> References: <1389469372-17199-1-git-send-email-tomasz.figa@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds support for registering power domains of S3C64xx SoCs and binding devices to them using device tree. Signed-off-by: Tomasz Figa --- arch/arm/mach-s3c64xx/pm.c | 71 +++++++++++++++++++++---- include/dt-bindings/arm/s3c64xx-power-domains.h | 26 +++++++++ 2 files changed, 88 insertions(+), 9 deletions(-) create mode 100644 include/dt-bindings/arm/s3c64xx-power-domains.h diff --git a/arch/arm/mach-s3c64xx/pm.c b/arch/arm/mach-s3c64xx/pm.c index 717d9be..673baaf 100644 --- a/arch/arm/mach-s3c64xx/pm.c +++ b/arch/arm/mach-s3c64xx/pm.c @@ -17,8 +17,11 @@ #include #include #include +#include #include +#include + #include #include @@ -164,17 +167,63 @@ static struct s3c64xx_pm_domain s3c64xx_pm_v = { }, }; -static struct s3c64xx_pm_domain *s3c64xx_pm_domains[] = { - &s3c64xx_pm_irom, - &s3c64xx_pm_etm, - &s3c64xx_pm_g, - &s3c64xx_pm_v, - &s3c64xx_pm_i, - &s3c64xx_pm_p, - &s3c64xx_pm_s, - &s3c64xx_pm_f, +static struct s3c64xx_pm_domain *s3c64xx_pm_domains[NR_DOMAINS] = { + [DOMAIN_V] = &s3c64xx_pm_v, + [DOMAIN_G] = &s3c64xx_pm_g, + [DOMAIN_I] = &s3c64xx_pm_i, + [DOMAIN_P] = &s3c64xx_pm_p, + [DOMAIN_F] = &s3c64xx_pm_f, + [DOMAIN_S] = &s3c64xx_pm_s, + [DOMAIN_ETM] = &s3c64xx_pm_etm, + [DOMAIN_IROM] = &s3c64xx_pm_irom, +}; + +#ifdef CONFIG_OF +static struct of_device_id s3c64xx_pd_matches[] = { + { .compatible = "samsung,s3c6400-clock", }, + { .compatible = "samsung,s3c6410-clock", }, + { }, }; +static struct genpd_onecell_data pd_data; + +static int s3c64xx_pm_parse_domains(void) +{ + struct device_node *np; + int i; + + np = of_find_matching_node(NULL, s3c64xx_pd_matches); + if (!np) + return -ENODEV; + + pd_data.domains = kcalloc(ARRAY_SIZE(s3c64xx_pm_domains), + sizeof(*pd_data.domains), GFP_KERNEL); + if (!pd_data.domains) + return -ENOMEM; + + for (i = 0; i < ARRAY_SIZE(s3c64xx_pm_domains); ++i) { + struct s3c64xx_pm_domain *pd = s3c64xx_pm_domains[i]; + struct dev_power_governor *gov = NULL; + int on; + + on = __raw_readl(S3C64XX_NORMAL_CFG) & pd->ena; + + if (pd->always_on) + gov = &pm_domain_always_on_gov; + + pm_genpd_init(&pd->pd, gov, !on); + pd_data.domains[i] = &pd->pd; + + pr_debug("%s: registered domain %s\n", __func__, pd->pd.name); + } + + pd_data.domain_num = ARRAY_SIZE(s3c64xx_pm_domains); + of_genpd_add_provider(np, of_genpd_xlate_onecell, &pd_data); + + return 0; +} +#endif + #ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK void s3c_pm_debug_smdkled(u32 set, u32 clear) { @@ -311,6 +360,10 @@ int __init s3c64xx_pm_init(void) s3c_pm_init(); +#ifdef CONFIG_OF + if (of_have_populated_dt()) + return s3c64xx_pm_parse_domains(); +#endif for (i = 0; i < ARRAY_SIZE(s3c64xx_pm_domains); i++) { struct s3c64xx_pm_domain *pd = s3c64xx_pm_domains[i]; diff --git a/include/dt-bindings/arm/s3c64xx-power-domains.h b/include/dt-bindings/arm/s3c64xx-power-domains.h new file mode 100644 index 0000000..ce39bef --- /dev/null +++ b/include/dt-bindings/arm/s3c64xx-power-domains.h @@ -0,0 +1,26 @@ +/* + * Copyright (c) 2014 Tomasz Figa + * + * 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. + * + * Device Tree binding constants for Samsung S3C64xx power domains. +*/ + +#ifndef _DT_BINDINGS_ARM_S3C64XX_POWER_DOMAINS_H +#define _DT_BINDINGS_ARM_S3C64XX_POWER_DOMAINS_H + +#define DOMAIN_V 0 +#define DOMAIN_G 1 +#define DOMAIN_I 2 +#define DOMAIN_P 3 +#define DOMAIN_F 4 +#define DOMAIN_S 5 +#define DOMAIN_ETM 6 +#define DOMAIN_IROM 7 + +/* Total number of clocks. */ +#define NR_DOMAINS (DOMAIN_IROM + 1) + +#endif /* _DT_BINDINGS_ARM_S3C64XX_POWER_DOMAINS_H */ -- 1.8.5.2 -- 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/