From patchwork Thu Aug 4 11:04:49 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: 1034902 Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by demeter2.kernel.org (8.14.4/8.14.4) with ESMTP id p74B7X2b027438 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 4 Aug 2011 11:07:54 GMT Received: from canuck.infradead.org ([134.117.69.58]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qovlb-0007ml-Vq; Thu, 04 Aug 2011 11:07:11 +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 1QovlS-0003ha-Mb; Thu, 04 Aug 2011 11:06:58 +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 1Qovjl-0003Fo-2g for linux-arm-kernel@lists.infradead.org; Thu, 04 Aug 2011 11:05:19 +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 p74B59Gg016672 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 4 Aug 2011 06:05:11 -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 p74B58OS006164; Thu, 4 Aug 2011 16:35:08 +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; Thu, 4 Aug 2011 16:35:08 +0530 Received: from localhost.localdomain ([172.24.190.79]) by dbdp31.itg.ti.com (8.13.8/8.13.8) with ESMTP id p74B523C004289; Thu, 4 Aug 2011 16:35:08 +0530 (IST) From: Tarun Kanti DebBarma To: Subject: [PATCH v5 18/22] gpio/omap: use pm-runtime framework Date: Thu, 4 Aug 2011 16:34:49 +0530 Message-ID: <1312455893-14922-19-git-send-email-tarun.kanti@ti.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1312455893-14922-1-git-send-email-tarun.kanti@ti.com> References: <1312455893-14922-1-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-20110804_070513_431052_470A3C19 X-CRM114-Status: GOOD ( 18.28 ) X-Spam-Score: -3.1 (---) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (-3.1 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] -0.8 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain Cc: khilman@ti.com, tony@atomide.com, santosh.shilimkar@ti.com, Tarun Kanti DebBarma , 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 (demeter2.kernel.org [140.211.167.43]); Thu, 04 Aug 2011 11:07:54 +0000 (UTC) Call runtime pm APIs pm_runtime_get_sync() and pm_runtime_put_sync() for enabling/disabling clocks appropriately. Remove syscore_ops and instead use dev_pm_ops now. Signed-off-by: Charulatha V Signed-off-by: Tarun Kanti DebBarma --- drivers/gpio/gpio-omap.c | 89 ++++++++++++++++++++++++++++++++++----------- 1 files changed, 67 insertions(+), 22 deletions(-) diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 0545d8f..bca6dcd 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -79,6 +79,8 @@ struct gpio_bank { struct omap_gpio_reg_offs *regs; }; +static void omap_gpio_mod_init(struct gpio_bank *bank); + #define GPIO_INDEX(bank, gpio) (gpio % bank->width) #define GPIO_BIT(bank, gpio) (1 << GPIO_INDEX(bank, gpio)) #define GPIO_MOD_CTRL_BIT BIT(0) @@ -481,6 +483,19 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset) spin_lock_irqsave(&bank->lock, flags); + /* + * If this is the first gpio_request for the bank, + * enable the bank module. + */ + if (!bank->mod_usage) + if (IS_ERR_VALUE(pm_runtime_get_sync(bank->dev) < 0)) { + dev_err(bank->dev, "%s: GPIO bank %d " + "pm_runtime_get_sync failed\n", + __func__, bank->id); + spin_unlock_irqrestore(&bank->lock, flags); + return -EINVAL; + } + /* Set trigger to none. You need to enable the desired trigger with * request_irq() or set_irq_type(). */ @@ -535,6 +550,19 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset) } _reset_gpio(bank, bank->chip.base + offset); + + /* + * If this is the last gpio to be freed in the bank, + * disable the bank module. + */ + if (!bank->mod_usage) { + if (IS_ERR_VALUE(pm_runtime_put_sync(bank->dev) < 0)) { + dev_err(bank->dev, "%s: GPIO bank %d " + "pm_runtime_put_sync failed\n", + __func__, bank->id); + } + } + spin_unlock_irqrestore(&bank->lock, flags); } @@ -561,6 +589,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) bank = irq_get_handler_data(irq); isr_reg = bank->base + bank->regs->irqstatus; + pm_runtime_get_sync(bank->dev); if (WARN_ON(!isr_reg)) goto exit; @@ -622,6 +651,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) exit: if (!unmasked) chained_irq_exit(chip, desc); + pm_runtime_put_sync_suspend(bank->dev); } static void gpio_irq_shutdown(struct irq_data *d) @@ -1023,7 +1053,13 @@ static int __devinit omap_gpio_probe(struct platform_device *pdev) } pm_runtime_enable(bank->dev); - pm_runtime_get_sync(bank->dev); + pm_runtime_irq_safe(bank->dev); + if (IS_ERR_VALUE(pm_runtime_get_sync(bank->dev) < 0)) { + dev_err(bank->dev, "%s: GPIO bank %d pm_runtime_get_sync " + "failed\n", __func__, bank->id); + iounmap(bank->base); + return -EINVAL; + } if (bank->is_mpuio) { if (bank->regs->wkup_status) @@ -1034,6 +1070,13 @@ static int __devinit omap_gpio_probe(struct platform_device *pdev) omap_gpio_chip_init(bank); omap_gpio_show_rev(bank); + if (IS_ERR_VALUE(pm_runtime_put_sync(bank->dev) < 0)) { + dev_err(bank->dev, "%s: GPIO bank %d pm_runtime_put_sync " + "failed\n", __func__, bank->id); + iounmap(bank->base); + return -EINVAL; + } + list_add_tail(&bank->node, &omap_gpio_list); return ret; @@ -1044,7 +1087,7 @@ err_exit: return ret; } -static int omap_gpio_suspend(void) +static int omap_gpio_suspend(struct device *dev) { struct gpio_bank *bank; @@ -1063,12 +1106,13 @@ static int omap_gpio_suspend(void) _gpio_rmw(base, bank->regs->wkup_status, bank->suspend_wakeup, 1); spin_unlock_irqrestore(&bank->lock, flags); + pm_runtime_put_sync(dev); } return 0; } -static void omap_gpio_resume(void) +static int omap_gpio_resume(struct device *dev) { struct gpio_bank *bank; @@ -1077,18 +1121,16 @@ static void omap_gpio_resume(void) unsigned long flags; if (!bank->regs->wkup_status) - return; + return 0; + pm_runtime_get_sync(dev); spin_lock_irqsave(&bank->lock, flags); _gpio_rmw(base, bank->regs->wkup_status, bank->saved_wakeup, 1); spin_unlock_irqrestore(&bank->lock, flags); } -} -static struct syscore_ops omap_gpio_syscore_ops = { - .suspend = omap_gpio_suspend, - .resume = omap_gpio_resume, -}; + return 0; +} #ifdef CONFIG_ARCH_OMAP2PLUS @@ -1112,6 +1154,11 @@ void omap2_gpio_prepare_for_idle(int off_mode) if (!off_mode) continue; + if (IS_ERR_VALUE(pm_runtime_put_sync(bank->dev) < 0)) + dev_err(bank->dev, "%s: GPIO bank %d " + "pm_runtime_put_sync failed\n", + __func__, bank->id); + /* If going to OFF, remove triggering for all * non-wakeup GPIOs. Otherwise spurious IRQs will be * generated. See OMAP2420 Errata item 1.101. */ @@ -1152,6 +1199,11 @@ void omap2_gpio_resume_after_idle(void) if (!bank->loses_context) continue; + if (IS_ERR_VALUE(pm_runtime_get_sync(bank->dev) < 0)) + dev_err(bank->dev, "%s: GPIO bank %d " + "pm_runtime_get_sync failed\n", + __func__, bank->id); + for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++) clk_enable(bank->dbck); @@ -1266,10 +1318,16 @@ static void omap_gpio_restore_context(struct gpio_bank *bank) } #endif +static const struct dev_pm_ops gpio_pm_ops = { + .suspend = omap_gpio_suspend, + .resume = omap_gpio_resume, +}; + static struct platform_driver omap_gpio_driver = { .probe = omap_gpio_probe, .driver = { .name = "omap_gpio", + .pm = &gpio_pm_ops, }, }; @@ -1283,16 +1341,3 @@ static int __init omap_gpio_drv_reg(void) return platform_driver_register(&omap_gpio_driver); } postcore_initcall(omap_gpio_drv_reg); - -static int __init omap_gpio_sysinit(void) -{ - -#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS) - if (cpu_is_omap16xx() || cpu_class_is_omap2()) - register_syscore_ops(&omap_gpio_syscore_ops); -#endif - - return 0; -} - -arch_initcall(omap_gpio_sysinit);