Initial import

1 files changed, 160 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/gpio.c b/arch/arm/mach-omap2/gpio.c
new file mode 100644
index 000000000..7a577145b
--- /dev/null
+++ b/arch/arm/mach-omap2/gpio.c
@@ -0,0 +1,160 @@
+/*
+ * OMAP2+ specific gpio initialization
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Author:
+ *	Charulatha V <charu@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/gpio.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/of.h>
+#include <linux/platform_data/gpio-omap.h>
+
+#include "soc.h"
+#include "omap_hwmod.h"
+#include "omap_device.h"
+#include "omap-pm.h"
+
+#include "powerdomain.h"
+
+static int __init omap2_gpio_dev_init(struct omap_hwmod *oh, void *unused)
+{
+	struct platform_device *pdev;
+	struct omap_gpio_platform_data *pdata;
+	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
+	 * hwmod database and use the same for constructing ids for
+	 * gpio devices.
+	 * CAUTION: Make sure the name in the hwmod database does
+	 * not change. If changed, make corresponding change here
+	 * or make use of static variable mechanism to handle this.
+	 */
+	sscanf(oh->name, "gpio%d", &id);
+
+	pdata = kzalloc(sizeof(struct omap_gpio_platform_data), GFP_KERNEL);
+	if (!pdata) {
+		pr_err("gpio%d: Memory allocation failed\n", id);
+		return -ENOMEM;
+	}
+
+	dev_attr = (struct omap_gpio_dev_attr *)oh->dev_attr;
+	pdata->bank_width = dev_attr->bank_width;
+	pdata->dbck_flag = dev_attr->dbck_flag;
+	pdata->get_context_loss_count = omap_pm_get_dev_context_loss_count;
+	pdata->regs = kzalloc(sizeof(struct omap_gpio_reg_offs), GFP_KERNEL);
+	if (!pdata->regs) {
+		pr_err("gpio%d: Memory allocation failed\n", id);
+		kfree(pdata);
+		return -ENOMEM;
+	}
+
+	switch (oh->class->rev) {
+	case 0:
+		if (id == 1)
+			/* non-wakeup GPIO pins for OMAP2 Bank1 */
+			pdata->non_wakeup_gpios = 0xe203ffc0;
+		else if (id == 2)
+			/* non-wakeup GPIO pins for OMAP2 Bank2 */
+			pdata->non_wakeup_gpios = 0x08700040;
+		/* fall through */
+
+	case 1:
+		pdata->regs->revision = OMAP24XX_GPIO_REVISION;
+		pdata->regs->direction = OMAP24XX_GPIO_OE;
+		pdata->regs->datain = OMAP24XX_GPIO_DATAIN;
+		pdata->regs->dataout = OMAP24XX_GPIO_DATAOUT;
+		pdata->regs->set_dataout = OMAP24XX_GPIO_SETDATAOUT;
+		pdata->regs->clr_dataout = OMAP24XX_GPIO_CLEARDATAOUT;
+		pdata->regs->irqstatus = OMAP24XX_GPIO_IRQSTATUS1;
+		pdata->regs->irqstatus2 = OMAP24XX_GPIO_IRQSTATUS2;
+		pdata->regs->irqenable = OMAP24XX_GPIO_IRQENABLE1;
+		pdata->regs->irqenable2 = OMAP24XX_GPIO_IRQENABLE2;
+		pdata->regs->set_irqenable = OMAP24XX_GPIO_SETIRQENABLE1;
+		pdata->regs->clr_irqenable = OMAP24XX_GPIO_CLEARIRQENABLE1;
+		pdata->regs->debounce = OMAP24XX_GPIO_DEBOUNCE_VAL;
+		pdata->regs->debounce_en = OMAP24XX_GPIO_DEBOUNCE_EN;
+		pdata->regs->ctrl = OMAP24XX_GPIO_CTRL;
+		pdata->regs->wkup_en = OMAP24XX_GPIO_WAKE_EN;
+		pdata->regs->leveldetect0 = OMAP24XX_GPIO_LEVELDETECT0;
+		pdata->regs->leveldetect1 = OMAP24XX_GPIO_LEVELDETECT1;
+		pdata->regs->risingdetect = OMAP24XX_GPIO_RISINGDETECT;
+		pdata->regs->fallingdetect = OMAP24XX_GPIO_FALLINGDETECT;
+		break;
+	case 2:
+		pdata->regs->revision = OMAP4_GPIO_REVISION;
+		pdata->regs->direction = OMAP4_GPIO_OE;
+		pdata->regs->datain = OMAP4_GPIO_DATAIN;
+		pdata->regs->dataout = OMAP4_GPIO_DATAOUT;
+		pdata->regs->set_dataout = OMAP4_GPIO_SETDATAOUT;
+		pdata->regs->clr_dataout = OMAP4_GPIO_CLEARDATAOUT;
+		pdata->regs->irqstatus_raw0 = OMAP4_GPIO_IRQSTATUSRAW0;
+		pdata->regs->irqstatus_raw1 = OMAP4_GPIO_IRQSTATUSRAW1;
+		pdata->regs->irqstatus = OMAP4_GPIO_IRQSTATUS0;
+		pdata->regs->irqstatus2 = OMAP4_GPIO_IRQSTATUS1;
+		pdata->regs->irqenable = OMAP4_GPIO_IRQSTATUSSET0;
+		pdata->regs->irqenable2 = OMAP4_GPIO_IRQSTATUSSET1;
+		pdata->regs->set_irqenable = OMAP4_GPIO_IRQSTATUSSET0;
+		pdata->regs->clr_irqenable = OMAP4_GPIO_IRQSTATUSCLR0;
+		pdata->regs->debounce = OMAP4_GPIO_DEBOUNCINGTIME;
+		pdata->regs->debounce_en = OMAP4_GPIO_DEBOUNCENABLE;
+		pdata->regs->ctrl = OMAP4_GPIO_CTRL;
+		pdata->regs->wkup_en = OMAP4_GPIO_IRQWAKEN0;
+		pdata->regs->leveldetect0 = OMAP4_GPIO_LEVELDETECT0;
+		pdata->regs->leveldetect1 = OMAP4_GPIO_LEVELDETECT1;
+		pdata->regs->risingdetect = OMAP4_GPIO_RISINGDETECT;
+		pdata->regs->fallingdetect = OMAP4_GPIO_FALLINGDETECT;
+		break;
+	default:
+		WARN(1, "Invalid gpio bank_type\n");
+		kfree(pdata->regs);
+		kfree(pdata);
+		return -EINVAL;
+	}
+
+	pwrdm = omap_hwmod_get_pwrdm(oh);
+	pdata->loses_context = pwrdm_can_ever_lose_context(pwrdm);
+
+	pdev = omap_device_build(name, id - 1, oh, pdata, sizeof(*pdata));
+	kfree(pdata);
+
+	if (IS_ERR(pdev)) {
+		WARN(1, "Can't build omap_device for %s:%s.\n",
+					name, oh->name);
+		return PTR_ERR(pdev);
+	}
+
+	return 0;
+}
+
+/*
+ * gpio_init needs to be done before
+ * machine_init functions access gpio APIs.
+ * Hence gpio_init is a omap_postcore_initcall.
+ */
+static int __init omap2_gpio_init(void)
+{
+	/* If dtb is there, the devices will be created dynamically */
+	if (of_have_populated_dt())
+		return -ENODEV;
+
+	return omap_hwmod_for_each_by_class("gpio", omap2_gpio_dev_init, NULL);
+}
+omap_postcore_initcall(omap2_gpio_init);