From patchwork Sat Jul 16 08:15:34 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tarun Kanti DebBarma X-Patchwork-Id: 981762 Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p6G8OrJ3020513 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sat, 16 Jul 2011 08:25:13 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qi0AN-0004cD-9l; Sat, 16 Jul 2011 08:24:03 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Qi057-0007AX-Ij; Sat, 16 Jul 2011 08:18:37 +0000 Received: from comal.ext.ti.com ([198.47.26.152]) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qi02j-0006bO-CB for linux-arm-kernel@lists.infradead.org; Sat, 16 Jul 2011 08:16:11 +0000 Received: from dbdp20.itg.ti.com ([172.24.170.38]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id p6G8G3r3012034 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 16 Jul 2011 03:16:05 -0500 Received: from dbde71.ent.ti.com (localhost [127.0.0.1]) by dbdp20.itg.ti.com (8.13.8/8.13.8) with ESMTP id p6G8G337025681; Sat, 16 Jul 2011 13:46:03 +0530 (IST) Received: from dbdp31.itg.ti.com (172.24.170.98) by DBDE71.ent.ti.com (172.24.170.149) with Microsoft SMTP Server id 8.3.106.1; Sat, 16 Jul 2011 13:46:03 +0530 Received: from localhost.localdomain ([172.24.190.145]) by dbdp31.itg.ti.com (8.13.8/8.13.8) with ESMTP id p6G8FqJJ019170; Sat, 16 Jul 2011 13:46:00 +0530 (IST) From: Tarun Kanti DebBarma To: Subject: [PATCH v4 REPOST 02/20] gpio/omap: use flag to identify wakeup domain Date: Sat, 16 Jul 2011 13:45:34 +0530 Message-ID: <1310804152-9243-3-git-send-email-tarun.kanti@ti.com> X-Mailer: git-send-email 1.6.0.4 In-Reply-To: <1310804152-9243-1-git-send-email-tarun.kanti@ti.com> References: <1310804152-9243-1-git-send-email-tarun.kanti@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110716_041609_666136_345EF85C X-CRM114-Status: GOOD ( 15.05 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [198.47.26.152 listed in list.dnswl.org] 0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain Cc: khilman@ti.com, tony@atomide.com, santosh.shilimkar@ti.com, linux-arm-kernel@lists.infradead.org, Charulatha V X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Sat, 16 Jul 2011 08:25:14 +0000 (UTC) From: Charulatha V In omap3, save/restore context is implemented for GPIO banks 2-6 as GPIO bank1 is in wakeup domain. Instead of identifying bank's power domain by bank id, use 'loses_context' flag which is filled by pwrdm_can_ever_lose_context() during dev_init. For getting the powerdomain pointer, omap_hwmod_get_pwrdm() is used. omap_device_get_pwrdm() could not be used as the pwrdm information needs to be filled in pdata, whereas omap_device_get_pwrdm() could be used only after omap_device_build() call. Signed-off-by: Charulatha V --- arch/arm/mach-omap2/gpio.c | 6 ++++++ arch/arm/plat-omap/include/plat/gpio.h | 1 + drivers/gpio/gpio-omap.c | 13 ++++++------- 3 files changed, 13 insertions(+), 7 deletions(-) diff --git a/arch/arm/mach-omap2/gpio.c b/arch/arm/mach-omap2/gpio.c index f805cda..95195a8 100644 --- a/arch/arm/mach-omap2/gpio.c +++ b/arch/arm/mach-omap2/gpio.c @@ -24,6 +24,8 @@ #include #include +#include "powerdomain.h" + static struct omap_device_pm_latency omap_gpio_latency[] = { [0] = { .deactivate_func = omap_device_idle_hwmods, @@ -39,6 +41,7 @@ static int omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused) struct omap_gpio_dev_attr *dev_attr; char *name = "omap_gpio"; int id; + struct powerdomain *pwrdm; /* * extract the device id from name field available in the @@ -107,6 +110,9 @@ static int omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused) return -EINVAL; } + pwrdm = omap_hwmod_get_pwrdm(oh); + pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm); + od = omap_device_build(name, id - 1, oh, pdata, sizeof(*pdata), omap_gpio_latency, ARRAY_SIZE(omap_gpio_latency), diff --git a/arch/arm/plat-omap/include/plat/gpio.h b/arch/arm/plat-omap/include/plat/gpio.h index dd330ed..58d0bf2 100644 --- a/arch/arm/plat-omap/include/plat/gpio.h +++ b/arch/arm/plat-omap/include/plat/gpio.h @@ -198,6 +198,7 @@ struct omap_gpio_platform_data { int bank_width; /* GPIO bank width */ int bank_stride; /* Only needed for omap1 MPUIO */ bool dbck_flag; /* dbck required or not - True for OMAP3&4 */ + bool loses_context; /* whether the bank would ever lose context */ struct omap_gpio_reg_offs *regs; }; diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index b1333d8..93457bf 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -56,6 +56,7 @@ struct gpio_bank { u32 dbck_enable_mask; struct device *dev; bool dbck_flag; + bool loses_context; int stride; u32 width; u16 id; @@ -1175,7 +1176,7 @@ static int __devinit omap_gpio_probe(struct platform_device *pdev) bank->dbck_flag = pdata->dbck_flag; bank->stride = pdata->bank_stride; bank->width = pdata->bank_width; - + bank->loses_context = pdata->loses_context; bank->regs = pdata->regs; if (bank->regs->set_dataout && bank->regs->clr_dataout) @@ -1331,8 +1332,7 @@ void omap2_gpio_prepare_for_idle(int off_mode) u32 l1 = 0, l2 = 0; int j; - /* TODO: Do not use cpu_is_omap34xx */ - if ((cpu_is_omap34xx()) && (bank->id == 0)) + if (!bank->loses_context) continue; for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++) @@ -1399,8 +1399,7 @@ void omap2_gpio_resume_after_idle(void) u32 l = 0, gen, gen0, gen1; int j; - /* TODO: Do not use cpu_is_omap34xx */ - if ((cpu_is_omap34xx()) && (bank->id == 0)) + if (!bank->loses_context) continue; for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++) @@ -1499,7 +1498,7 @@ void omap_gpio_save_context(void) list_for_each_entry(bank, &omap_gpio_list, node) { i++; - if (bank->id == 0) + if (!bank->loses_context) continue; gpio_context[i].irqenable1 = @@ -1533,7 +1532,7 @@ void omap_gpio_restore_context(void) list_for_each_entry(bank, &omap_gpio_list, node) { i++; - if (bank->id == 0) + if (!bank->loses_context) continue; __raw_writel(gpio_context[i].irqenable1,