From mboxrd@z Thu Jan 1 00:00:00 1970 From: Charulatha V Subject: [PATCH 5/9] OMAP:GPIO: Introduce support for OMAP2PLUS chip specific GPIO Date: Thu, 22 Apr 2010 21:25:16 +0530 Message-ID: <1271951720-21714-6-git-send-email-charu@ti.com> References: <1271951720-21714-1-git-send-email-charu@ti.com> <1271951720-21714-2-git-send-email-charu@ti.com> <1271951720-21714-3-git-send-email-charu@ti.com> <1271951720-21714-4-git-send-email-charu@ti.com> <1271951720-21714-5-git-send-email-charu@ti.com> Return-path: Received: from comal.ext.ti.com ([198.47.26.152]:34486 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755885Ab0DVPzJ (ORCPT ); Thu, 22 Apr 2010 11:55:09 -0400 In-Reply-To: <1271951720-21714-5-git-send-email-charu@ti.com> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: linux-omap@vger.kernel.org Cc: rnayak@ti.com, paul@pwsan.com, tony@atomide.com, khilman@deeprootsystems.com, Charulatha V This patch adds support for handling GPIO as a HWMOD adapted platform device for OMAP2PLUS chips. Signed-off-by: Charulatha V --- arch/arm/mach-omap2/gpio.c | 101 ++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 101 insertions(+), 0 deletions(-) create mode 100644 arch/arm/mach-omap2/gpio.c diff --git a/arch/arm/mach-omap2/gpio.c b/arch/arm/mach-omap2/gpio.c new file mode 100644 index 0000000..6424050 --- /dev/null +++ b/arch/arm/mach-omap2/gpio.c @@ -0,0 +1,101 @@ +/* + * gpio.c - OMAP2PLUS-specific gpio code + * + * Copyright (C) 2010 Texas Instruments, Inc. + * + * Author: + * Charulatha V + * + * 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. + */ + +#include +#include +#include +#include + +static int gpio_bank_count; + +struct omap_device_pm_latency omap_gpio_latency[] = { + [0] = { + .deactivate_func = omap_device_idle_hwmods, + .activate_func = omap_device_enable_hwmods, + .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST, + }, +}; + +int __init gpio_init(void) +{ + int i = 0; + static int is_early_device = true; + + do { + struct omap_device *od; + struct omap_hwmod *oh; + int hw_mod_name_len = 16; + int l; + char oh_name[hw_mod_name_len]; + struct omap_gpio_platform_data *pdata; + char *name = "omap-gpio"; + + l = snprintf(oh_name, hw_mod_name_len, "gpio%d_hwmod", i + 1); + WARN(l >= hw_mod_name_len, + "String buffer overflow in GPIO device setup\n"); + + oh = omap_hwmod_lookup(oh_name); + if (!oh) { + pr_err("Could not look up %s\n", oh_name); + i++; + continue; + } + + pdata = kzalloc(sizeof(struct omap_gpio_platform_data), + GFP_KERNEL); + if (!pdata) { + pr_err("Memory allocation failed gpio%d\n", i + 1); + return -ENOMEM; + } + pdata->base = oh->_rt_va; + pdata->irq = oh->mpu_irqs[0].irq; + if (cpu_is_omap24xx() || cpu_is_omap34xx()) + pdata->method = METHOD_GPIO_24XX; + if (cpu_is_omap44xx()) + pdata->method = METHOD_GPIO_44XX; + pdata->virtual_irq_start = IH_GPIO_BASE + 32 * i; + pdata->device_enable = omap_device_enable; + pdata->device_idle = omap_device_idle; + pdata->device_shutdown = omap_device_shutdown; + + od = omap_device_build(name, i, oh, pdata, + sizeof(*pdata), omap_gpio_latency, + ARRAY_SIZE(omap_gpio_latency), + is_early_device); + WARN(IS_ERR(od), "Cant build omap_device for %s:%s.\n", + name, oh->name); + + i++; + } while (i < gpio_bank_count); + is_early_device = false; + + return 0; +} +arch_initcall(gpio_init); + +int __init omap2_gpio_init(void) +{ + if (cpu_is_omap242x()) + gpio_bank_count = 4; + else if (cpu_is_omap243x()) + gpio_bank_count = 5; + else if (cpu_is_omap34xx() || cpu_is_omap44xx()) + gpio_bank_count = OMAP34XX_NR_GPIOS; + + if (gpio_init()) + return -EINVAL; + + early_platform_driver_register_all("earlygpio"); + early_platform_driver_probe("earlygpio", gpio_bank_count, 0); + return 0; +} -- 1.6.3.3