From patchwork Fri Jul 1 09:46:55 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: 935382 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter2.kernel.org (8.14.4/8.14.4) with ESMTP id p619lLAb007325 for ; Fri, 1 Jul 2011 09:47:22 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755539Ab1GAJrU (ORCPT ); Fri, 1 Jul 2011 05:47:20 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:53452 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755161Ab1GAJrU (ORCPT ); Fri, 1 Jul 2011 05:47:20 -0400 Received: from dbdp20.itg.ti.com ([172.24.170.38]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id p619lGXn020182 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 1 Jul 2011 04:47:18 -0500 Received: from dbde70.ent.ti.com (localhost [127.0.0.1]) by dbdp20.itg.ti.com (8.13.8/8.13.8) with ESMTP id p619lFNr004593; Fri, 1 Jul 2011 15:17:15 +0530 (IST) Received: from dbdp31.itg.ti.com (172.24.170.98) by DBDE70.ent.ti.com (172.24.170.148) with Microsoft SMTP Server id 8.3.106.1; Fri, 1 Jul 2011 15:17:15 +0530 Received: from localhost.localdomain ([172.24.190.145]) by dbdp31.itg.ti.com (8.13.8/8.13.8) with ESMTP id p619l7mS023254; Fri, 1 Jul 2011 15:17:12 +0530 (IST) From: Tarun Kanti DebBarma To: CC: khilman@ti.com, santosh.shilimkar@ti.com, tony@atomide.com, Charulatha V Subject: [PATCH v3 01/20] GPIO: OMAP: Remove dependency on gpio_bank_count Date: Fri, 1 Jul 2011 15:16:55 +0530 Message-ID: <1309513634-20971-2-git-send-email-tarun.kanti@ti.com> X-Mailer: git-send-email 1.6.0.4 In-Reply-To: <1309513634-20971-1-git-send-email-tarun.kanti@ti.com> References: <1309513634-20971-1-git-send-email-tarun.kanti@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@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]); Fri, 01 Jul 2011 09:47:22 +0000 (UTC) From: Charulatha V The gpio_bank_count is the count of number of GPIO devices in a SoC. Remove this dependency from the driver by using list. Also remove the dependency on array of pointers to gpio_bank struct of all GPIO devices. Signed-off-by: Charulatha V --- arch/arm/mach-omap1/gpio15xx.c | 1 - arch/arm/mach-omap1/gpio16xx.c | 2 - arch/arm/mach-omap1/gpio7xx.c | 2 - arch/arm/mach-omap2/gpio.c | 1 - arch/arm/plat-omap/include/plat/gpio.h | 3 - drivers/gpio/gpio-omap.c | 163 ++++++++++++++++---------------- 6 files changed, 80 insertions(+), 92 deletions(-) diff --git a/arch/arm/mach-omap1/gpio15xx.c b/arch/arm/mach-omap1/gpio15xx.c index f79c6ae..e8a3bd9 100644 --- a/arch/arm/mach-omap1/gpio15xx.c +++ b/arch/arm/mach-omap1/gpio15xx.c @@ -115,7 +115,6 @@ static int __init omap15xx_gpio_init(void) platform_device_register(&omap15xx_mpu_gpio); platform_device_register(&omap15xx_gpio); - gpio_bank_count = 2; return 0; } postcore_initcall(omap15xx_gpio_init); diff --git a/arch/arm/mach-omap1/gpio16xx.c b/arch/arm/mach-omap1/gpio16xx.c index c69b3b1..9a97e60 100644 --- a/arch/arm/mach-omap1/gpio16xx.c +++ b/arch/arm/mach-omap1/gpio16xx.c @@ -221,8 +221,6 @@ static int __init omap16xx_gpio_init(void) for (i = 0; i < ARRAY_SIZE(omap16xx_gpio_dev); i++) platform_device_register(omap16xx_gpio_dev[i]); - gpio_bank_count = ARRAY_SIZE(omap16xx_gpio_dev); - return 0; } postcore_initcall(omap16xx_gpio_init); diff --git a/arch/arm/mach-omap1/gpio7xx.c b/arch/arm/mach-omap1/gpio7xx.c index d7f2ad3..f5d5572 100644 --- a/arch/arm/mach-omap1/gpio7xx.c +++ b/arch/arm/mach-omap1/gpio7xx.c @@ -282,8 +282,6 @@ static int __init omap7xx_gpio_init(void) for (i = 0; i < ARRAY_SIZE(omap7xx_gpio_dev); i++) platform_device_register(omap7xx_gpio_dev[i]); - gpio_bank_count = ARRAY_SIZE(omap7xx_gpio_dev); - return 0; } postcore_initcall(omap7xx_gpio_init); diff --git a/arch/arm/mach-omap2/gpio.c b/arch/arm/mach-omap2/gpio.c index 9a46d77..f805cda 100644 --- a/arch/arm/mach-omap2/gpio.c +++ b/arch/arm/mach-omap2/gpio.c @@ -119,7 +119,6 @@ static int omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused) return PTR_ERR(od); } - gpio_bank_count++; return 0; } diff --git a/arch/arm/plat-omap/include/plat/gpio.h b/arch/arm/plat-omap/include/plat/gpio.h index 91e8de3..dd330ed 100644 --- a/arch/arm/plat-omap/include/plat/gpio.h +++ b/arch/arm/plat-omap/include/plat/gpio.h @@ -202,9 +202,6 @@ struct omap_gpio_platform_data { struct omap_gpio_reg_offs *regs; }; -/* TODO: Analyze removing gpio_bank_count usage from driver code */ -extern int gpio_bank_count; - extern void omap2_gpio_prepare_for_idle(int off_mode); extern void omap2_gpio_resume_after_idle(void); extern void omap_set_gpio_debounce(int gpio, int enable); diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 501ca3d..28b70eb 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -28,7 +28,10 @@ #include #include +static LIST_HEAD(omap_gpio_list); + struct gpio_bank { + struct list_head node; unsigned long pbase; void __iomem *base; u16 irq; @@ -55,6 +58,7 @@ struct gpio_bank { bool dbck_flag; int stride; u32 width; + u16 id; void (*set_dataout)(struct gpio_bank *bank, int gpio, int enable); @@ -78,15 +82,6 @@ struct omap3_gpio_regs { static struct omap3_gpio_regs gpio_context[OMAP34XX_NR_GPIOS]; #endif -/* - * TODO: Cleanup gpio_bank usage as it is having information - * related to all instances of the device - */ -static struct gpio_bank *gpio_bank; - -/* TODO: Analyze removing gpio_bank_count usage from driver code */ -int gpio_bank_count; - #define GPIO_INDEX(bank, gpio) (gpio % bank->width) #define GPIO_BIT(bank, gpio) (1 << GPIO_INDEX(bank, gpio)) @@ -864,9 +859,8 @@ static struct platform_device omap_mpuio_device = { /* could list the /proc/iomem resources */ }; -static inline void mpuio_init(void) +static inline void mpuio_init(struct gpio_bank *bank) { - struct gpio_bank *bank = &gpio_bank[0]; platform_set_drvdata(&omap_mpuio_device, bank); if (platform_driver_register(&omap_mpuio_driver) == 0) @@ -874,13 +868,13 @@ static inline void mpuio_init(void) } #else -static inline void mpuio_init(void) {} +static inline void mpuio_init(struct gpio_bank *bank) {} #endif /* 16xx */ #else #define bank_is_mpuio(bank) 0 -static inline void mpuio_init(void) {} +static inline void mpuio_init(struct gpio_bank *bank) {} #endif @@ -1002,20 +996,8 @@ static void __init omap_gpio_show_rev(struct gpio_bank *bank) */ static struct lock_class_key gpio_lock_class; -static inline int init_gpio_info(struct platform_device *pdev) -{ - /* TODO: Analyze removing gpio_bank_count usage from driver code */ - gpio_bank = kzalloc(gpio_bank_count * sizeof(struct gpio_bank), - GFP_KERNEL); - if (!gpio_bank) { - dev_err(&pdev->dev, "Memory alloc failed for gpio_bank\n"); - return -ENOMEM; - } - return 0; -} - /* TODO: Cleanup cpu_is_* checks */ -static void omap_gpio_mod_init(struct gpio_bank *bank, int id) +static void omap_gpio_mod_init(struct gpio_bank *bank) { if (cpu_class_is_omap2()) { if (cpu_is_omap44xx()) { @@ -1039,13 +1021,16 @@ static void omap_gpio_mod_init(struct gpio_bank *bank, int id) static const u32 non_wakeup_gpios[] = { 0xe203ffc0, 0x08700040 }; - if (id < ARRAY_SIZE(non_wakeup_gpios)) - bank->non_wakeup_gpios = non_wakeup_gpios[id]; + if (bank->id < ARRAY_SIZE(non_wakeup_gpios)) + bank->non_wakeup_gpios = + non_wakeup_gpios[bank->id]; } } else if (cpu_class_is_omap1()) { - if (bank_is_mpuio(bank)) + if (bank_is_mpuio(bank)) { __raw_writew(0xffff, bank->base + OMAP_MPUIO_GPIO_MASKIT / bank->stride); + mpuio_init(bank); + } if (cpu_is_omap15xx() && bank->method == METHOD_GPIO_1510) { __raw_writew(0xffff, bank->base + OMAP1510_GPIO_INT_MASK); @@ -1151,35 +1136,35 @@ static void __devinit omap_gpio_chip_init(struct gpio_bank *bank) static int __devinit omap_gpio_probe(struct platform_device *pdev) { - static int gpio_init_done; struct omap_gpio_platform_data *pdata; struct resource *res; - int id; struct gpio_bank *bank; + int ret = 0; - if (!pdev->dev.platform_data) - return -EINVAL; - - pdata = pdev->dev.platform_data; - - if (!gpio_init_done) { - int ret; - - ret = init_gpio_info(pdev); - if (ret) - return ret; + if (!pdev->dev.platform_data) { + ret = -EINVAL; + goto err_exit; } - id = pdev->id; - bank = &gpio_bank[id]; + bank = kzalloc(sizeof(struct gpio_bank), GFP_KERNEL); + if (!bank) { + dev_err(&pdev->dev, "Memory alloc failed for gpio_bank\n"); + ret = -ENOMEM; + goto err_exit; + } res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (unlikely(!res)) { - dev_err(&pdev->dev, "GPIO Bank %i Invalid IRQ resource\n", id); - return -ENODEV; + dev_err(&pdev->dev, "GPIO Bank %i Invalid IRQ resource\n", + pdev->id); + ret = -ENODEV; + goto err_free; } bank->irq = res->start; + bank->id = pdev->id; + + pdata = pdev->dev.platform_data; bank->virtual_irq_start = pdata->virtual_irq_start; bank->method = pdata->bank_type; bank->dev = &pdev->dev; @@ -1199,39 +1184,46 @@ static int __devinit omap_gpio_probe(struct platform_device *pdev) /* Static mapping, never released */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (unlikely(!res)) { - dev_err(&pdev->dev, "GPIO Bank %i Invalid mem resource\n", id); - return -ENODEV; + dev_err(&pdev->dev, "GPIO Bank %i Invalid mem resource\n", + pdev->id); + ret = -ENODEV; + goto err_free; } bank->base = ioremap(res->start, resource_size(res)); if (!bank->base) { - dev_err(&pdev->dev, "Could not ioremap gpio bank%i\n", id); - return -ENOMEM; + dev_err(&pdev->dev, "Could not ioremap gpio bank%i\n", + pdev->id); + ret = -ENOMEM; + goto err_free; } pm_runtime_enable(bank->dev); pm_runtime_get_sync(bank->dev); - omap_gpio_mod_init(bank, id); + omap_gpio_mod_init(bank); omap_gpio_chip_init(bank); omap_gpio_show_rev(bank); - if (!gpio_init_done) - gpio_init_done = 1; + list_add_tail(&bank->node, &omap_gpio_list); - return 0; + return ret; + +err_free: + kfree(bank); +err_exit: + return ret; } #if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS) static int omap_gpio_suspend(void) { - int i; + struct gpio_bank *bank; if (!cpu_class_is_omap2() && !cpu_is_omap16xx()) return 0; - for (i = 0; i < gpio_bank_count; i++) { - struct gpio_bank *bank = &gpio_bank[i]; + list_for_each_entry(bank, &omap_gpio_list, node) { void __iomem *wake_status; void __iomem *wake_clear; void __iomem *wake_set; @@ -1275,13 +1267,12 @@ static int omap_gpio_suspend(void) static void omap_gpio_resume(void) { - int i; + struct gpio_bank *bank; if (!cpu_class_is_omap2() && !cpu_is_omap16xx()) return; - for (i = 0; i < gpio_bank_count; i++) { - struct gpio_bank *bank = &gpio_bank[i]; + list_for_each_entry(bank, &omap_gpio_list, node) { void __iomem *wake_clear; void __iomem *wake_set; unsigned long flags; @@ -1329,17 +1320,17 @@ static int workaround_enabled; void omap2_gpio_prepare_for_idle(int off_mode) { - int i, c = 0; - int min = 0; - - if (cpu_is_omap34xx()) - min = 1; + int c = 0; + struct gpio_bank *bank; - for (i = min; i < gpio_bank_count; i++) { - struct gpio_bank *bank = &gpio_bank[i]; + list_for_each_entry(bank, &omap_gpio_list, node) { u32 l1 = 0, l2 = 0; int j; + /* TODO: Do not use cpu_is_omap34xx */ + if ((cpu_is_omap34xx()) && (bank->id == 0)) + continue; + for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++) clk_disable(bank->dbck); @@ -1398,16 +1389,16 @@ void omap2_gpio_prepare_for_idle(int off_mode) void omap2_gpio_resume_after_idle(void) { - int i; - int min = 0; + struct gpio_bank *bank; - if (cpu_is_omap34xx()) - min = 1; - for (i = min; i < gpio_bank_count; i++) { - struct gpio_bank *bank = &gpio_bank[i]; + list_for_each_entry(bank, &omap_gpio_list, node) { u32 l = 0, gen, gen0, gen1; int j; + /* TODO: Do not use cpu_is_omap34xx */ + if ((cpu_is_omap34xx()) && (bank->id == 0)) + continue; + for (j = 0; j < hweight_long(bank->dbck_enable_mask); j++) clk_enable(bank->dbck); @@ -1496,14 +1487,17 @@ void omap2_gpio_resume_after_idle(void) #endif #ifdef CONFIG_ARCH_OMAP3 -/* save the registers of bank 2-6 */ void omap_gpio_save_context(void) { - int i; + struct gpio_bank *bank; + int i = 0; + + list_for_each_entry(bank, &omap_gpio_list, node) { + i++; + + if (bank->id == 0) + continue; - /* saving banks from 2-6 only since GPIO1 is in WKUP */ - for (i = 1; i < gpio_bank_count; i++) { - struct gpio_bank *bank = &gpio_bank[i]; gpio_context[i].irqenable1 = __raw_readl(bank->base + OMAP24XX_GPIO_IRQENABLE1); gpio_context[i].irqenable2 = @@ -1527,13 +1521,17 @@ void omap_gpio_save_context(void) } } -/* restore the required registers of bank 2-6 */ void omap_gpio_restore_context(void) { - int i; + struct gpio_bank *bank; + int i = 0; + + list_for_each_entry(bank, &omap_gpio_list, node) { + i++; + + if (bank->id == 0) + continue; - for (i = 1; i < gpio_bank_count; i++) { - struct gpio_bank *bank = &gpio_bank[i]; __raw_writel(gpio_context[i].irqenable1, bank->base + OMAP24XX_GPIO_IRQENABLE1); __raw_writel(gpio_context[i].irqenable2, @@ -1578,7 +1576,6 @@ postcore_initcall(omap_gpio_drv_reg); static int __init omap_gpio_sysinit(void) { - mpuio_init(); #if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP2PLUS) if (cpu_is_omap16xx() || cpu_class_is_omap2())