2008-07-05 15:02:49 +07:00
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/*
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* MXC GPIO support. (c) 2008 Daniel Mack <daniel@caiaq.de>
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* Copyright 2008 Juergen Beisert, kernel@pengutronix.de
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*
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* Based on code from Freescale,
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2010-04-22 20:28:42 +07:00
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* Copyright (C) 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved.
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2008-07-05 15:02:49 +07:00
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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2013-07-23 04:17:52 +07:00
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#include <linux/err.h>
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2008-07-05 15:02:49 +07:00
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#include <linux/init.h>
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2010-10-23 21:12:48 +07:00
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#include <linux/interrupt.h>
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2008-07-05 15:02:49 +07:00
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#include <linux/io.h>
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#include <linux/irq.h>
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2012-06-13 08:04:03 +07:00
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#include <linux/irqdomain.h>
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2013-01-18 22:31:37 +07:00
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#include <linux/irqchip/chained_irq.h>
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2008-07-05 15:02:49 +07:00
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#include <linux/gpio.h>
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2011-06-05 23:07:55 +07:00
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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2011-06-06 12:22:41 +07:00
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#include <linux/basic_mmio_gpio.h>
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2011-07-06 23:37:43 +07:00
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#include <linux/of.h>
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#include <linux/of_device.h>
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2011-07-04 00:38:09 +07:00
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#include <linux/module.h>
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2015-08-28 14:27:22 +07:00
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#include <linux/bug.h>
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2008-07-05 15:02:49 +07:00
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2011-07-06 23:37:41 +07:00
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enum mxc_gpio_hwtype {
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IMX1_GPIO, /* runs on i.mx1 */
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IMX21_GPIO, /* runs on i.mx21 and i.mx27 */
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2012-06-23 02:04:06 +07:00
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IMX31_GPIO, /* runs on i.mx31 */
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IMX35_GPIO, /* runs on all other i.mx */
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2011-07-06 23:37:41 +07:00
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};
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/* device type dependent stuff */
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struct mxc_gpio_hwdata {
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unsigned dr_reg;
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unsigned gdir_reg;
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unsigned psr_reg;
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unsigned icr1_reg;
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unsigned icr2_reg;
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unsigned imr_reg;
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unsigned isr_reg;
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2012-06-23 02:04:06 +07:00
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int edge_sel_reg;
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2011-07-06 23:37:41 +07:00
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unsigned low_level;
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unsigned high_level;
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unsigned rise_edge;
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unsigned fall_edge;
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};
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2011-06-05 23:07:55 +07:00
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struct mxc_gpio_port {
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struct list_head node;
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void __iomem *base;
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int irq;
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int irq_high;
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2012-06-13 08:04:03 +07:00
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struct irq_domain *domain;
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2011-06-06 12:22:41 +07:00
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struct bgpio_chip bgc;
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2011-06-05 23:07:55 +07:00
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u32 both_edges;
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};
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2011-07-06 23:37:41 +07:00
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static struct mxc_gpio_hwdata imx1_imx21_gpio_hwdata = {
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.dr_reg = 0x1c,
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.gdir_reg = 0x00,
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.psr_reg = 0x24,
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.icr1_reg = 0x28,
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.icr2_reg = 0x2c,
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.imr_reg = 0x30,
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.isr_reg = 0x34,
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2012-06-23 02:04:06 +07:00
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.edge_sel_reg = -EINVAL,
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2011-07-06 23:37:41 +07:00
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.low_level = 0x03,
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.high_level = 0x02,
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.rise_edge = 0x00,
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.fall_edge = 0x01,
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};
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static struct mxc_gpio_hwdata imx31_gpio_hwdata = {
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.dr_reg = 0x00,
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.gdir_reg = 0x04,
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.psr_reg = 0x08,
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.icr1_reg = 0x0c,
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.icr2_reg = 0x10,
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.imr_reg = 0x14,
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.isr_reg = 0x18,
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2012-06-23 02:04:06 +07:00
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.edge_sel_reg = -EINVAL,
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.low_level = 0x00,
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.high_level = 0x01,
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.rise_edge = 0x02,
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.fall_edge = 0x03,
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};
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static struct mxc_gpio_hwdata imx35_gpio_hwdata = {
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.dr_reg = 0x00,
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.gdir_reg = 0x04,
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.psr_reg = 0x08,
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.icr1_reg = 0x0c,
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.icr2_reg = 0x10,
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.imr_reg = 0x14,
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.isr_reg = 0x18,
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.edge_sel_reg = 0x1c,
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2011-07-06 23:37:41 +07:00
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.low_level = 0x00,
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.high_level = 0x01,
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.rise_edge = 0x02,
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.fall_edge = 0x03,
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};
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static enum mxc_gpio_hwtype mxc_gpio_hwtype;
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static struct mxc_gpio_hwdata *mxc_gpio_hwdata;
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#define GPIO_DR (mxc_gpio_hwdata->dr_reg)
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#define GPIO_GDIR (mxc_gpio_hwdata->gdir_reg)
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#define GPIO_PSR (mxc_gpio_hwdata->psr_reg)
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#define GPIO_ICR1 (mxc_gpio_hwdata->icr1_reg)
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#define GPIO_ICR2 (mxc_gpio_hwdata->icr2_reg)
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#define GPIO_IMR (mxc_gpio_hwdata->imr_reg)
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#define GPIO_ISR (mxc_gpio_hwdata->isr_reg)
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2012-06-23 02:04:06 +07:00
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#define GPIO_EDGE_SEL (mxc_gpio_hwdata->edge_sel_reg)
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2011-07-06 23:37:41 +07:00
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#define GPIO_INT_LOW_LEV (mxc_gpio_hwdata->low_level)
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#define GPIO_INT_HIGH_LEV (mxc_gpio_hwdata->high_level)
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#define GPIO_INT_RISE_EDGE (mxc_gpio_hwdata->rise_edge)
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#define GPIO_INT_FALL_EDGE (mxc_gpio_hwdata->fall_edge)
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2012-06-23 02:04:06 +07:00
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#define GPIO_INT_BOTH_EDGES 0x4
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2011-07-06 23:37:41 +07:00
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2015-05-01 22:56:47 +07:00
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static const struct platform_device_id mxc_gpio_devtype[] = {
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2011-07-06 23:37:41 +07:00
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{
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.name = "imx1-gpio",
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.driver_data = IMX1_GPIO,
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}, {
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.name = "imx21-gpio",
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.driver_data = IMX21_GPIO,
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}, {
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.name = "imx31-gpio",
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.driver_data = IMX31_GPIO,
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2012-06-23 02:04:06 +07:00
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}, {
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.name = "imx35-gpio",
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.driver_data = IMX35_GPIO,
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2011-07-06 23:37:41 +07:00
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}, {
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/* sentinel */
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}
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};
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2011-07-06 23:37:43 +07:00
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static const struct of_device_id mxc_gpio_dt_ids[] = {
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{ .compatible = "fsl,imx1-gpio", .data = &mxc_gpio_devtype[IMX1_GPIO], },
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{ .compatible = "fsl,imx21-gpio", .data = &mxc_gpio_devtype[IMX21_GPIO], },
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{ .compatible = "fsl,imx31-gpio", .data = &mxc_gpio_devtype[IMX31_GPIO], },
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2012-06-23 02:04:06 +07:00
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{ .compatible = "fsl,imx35-gpio", .data = &mxc_gpio_devtype[IMX35_GPIO], },
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2011-07-06 23:37:43 +07:00
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{ /* sentinel */ }
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};
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2011-06-05 23:07:55 +07:00
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/*
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* MX2 has one interrupt *for all* gpio ports. The list is used
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* to save the references to all ports, so that mx2_gpio_irq_handler
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* can walk through all interrupt status registers.
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*/
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static LIST_HEAD(mxc_gpio_ports);
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2008-07-05 15:02:49 +07:00
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/* Note: This driver assumes 32 GPIOs are handled in one register */
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2010-11-29 17:16:23 +07:00
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static int gpio_set_irq_type(struct irq_data *d, u32 type)
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2008-07-05 15:02:49 +07:00
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{
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2011-06-07 15:25:37 +07:00
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struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
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struct mxc_gpio_port *port = gc->private;
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2008-07-05 15:02:49 +07:00
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u32 bit, val;
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2012-06-13 08:04:03 +07:00
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u32 gpio_idx = d->hwirq;
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u32 gpio = port->bgc.gc.base + gpio_idx;
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2008-07-05 15:02:49 +07:00
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int edge;
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void __iomem *reg = port->base;
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2012-06-13 08:04:03 +07:00
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port->both_edges &= ~(1 << gpio_idx);
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2008-07-05 15:02:49 +07:00
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switch (type) {
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2008-07-27 10:23:31 +07:00
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case IRQ_TYPE_EDGE_RISING:
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2008-07-05 15:02:49 +07:00
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edge = GPIO_INT_RISE_EDGE;
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break;
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2008-07-27 10:23:31 +07:00
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case IRQ_TYPE_EDGE_FALLING:
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2008-07-05 15:02:49 +07:00
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edge = GPIO_INT_FALL_EDGE;
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break;
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2009-03-12 18:46:41 +07:00
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case IRQ_TYPE_EDGE_BOTH:
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2012-06-23 02:04:06 +07:00
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if (GPIO_EDGE_SEL >= 0) {
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edge = GPIO_INT_BOTH_EDGES;
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2009-03-12 18:46:41 +07:00
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} else {
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2012-06-23 02:04:06 +07:00
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val = gpio_get_value(gpio);
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if (val) {
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edge = GPIO_INT_LOW_LEV;
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pr_debug("mxc: set GPIO %d to low trigger\n", gpio);
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} else {
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edge = GPIO_INT_HIGH_LEV;
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pr_debug("mxc: set GPIO %d to high trigger\n", gpio);
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}
|
GPIO changes for v3.6:
- New driver for AMD-8111 southbridge GPIOs
- New driver for Wolfson Micro Arizona devices
- Propagate device tree parse errors
- Probe deferral finalizations - all expected calls to
GPIO will now hopefully request deferral where apropriate
- Misc updates to TCA6424, WM8994, LPC32xx, PCF857x, Samsung
MXC, OMAP and PCA953X drivers.
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Version: GnuPG v1.4.12 (GNU/Linux)
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lb3Barg+WWm+NW1kmPYnrOJUZXa1ApVHuz8db7OrcUy5kTcUhVTY3DcQzFgG1CZT
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=tujx
-----END PGP SIGNATURE-----
Merge tag 'gpio-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO changes from Linus Walleij:
- New driver for AMD-8111 southbridge GPIOs
- New driver for Wolfson Micro Arizona devices
- Propagate device tree parse errors
- Probe deferral finalizations - all expected calls to GPIO will now
hopefully request deferral where apropriate
- Misc updates to TCA6424, WM8994, LPC32xx, PCF857x, Samsung MXC, OMAP
and PCA953X drivers.
Fix up gpio_idx conflicts in drivers/gpio/gpio-mxc.c
* tag 'gpio-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: of_get_named_gpio_flags() return -EPROBE_DEFER if GPIO not yet available
gpiolib: Defer failed gpio requests by default
MAINTAINERS: add entry OMAP GPIO driver
gpio/pca953x: increase variables size to support 24 bit of data
GPIO: PCA953X: Increase size of invert variable to support 24 bit
gpio/omap: move bank->dbck initialization to omap_gpio_mod_init()
gpio/mxc: use the edge_sel feature if available
gpio: propagate of_parse_phandle_with_args errors
gpio: samsung: add flags specifier to device-tree binding
gpiolib: Add support for Wolfson Microelectronics Arizona class devices
gpio: gpio-lpc32xx: Add gpio_to_irq mapping
gpio: pcf857x: share 8/16 bit access functions
gpio: LPC32xx: Driver cleanup
MAINTAINERS: Add Wolfson gpiolib drivers to the Wolfson entry
gpiolib: wm8994: Convert to devm_kzalloc()
gpiolib: wm8994: Use irq_domain mappings for gpios
gpio: add a driver for GPIO pins found on AMD-8111 south bridge chips
gpio/tca6424: merge I2C transactions, remove cast
gpio/of: fix a typo of comment message
2012-07-27 03:56:38 +07:00
|
|
|
port->both_edges |= 1 << gpio_idx;
|
2009-03-12 18:46:41 +07:00
|
|
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}
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|
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break;
|
2008-07-27 10:23:31 +07:00
|
|
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case IRQ_TYPE_LEVEL_LOW:
|
2008-07-05 15:02:49 +07:00
|
|
|
edge = GPIO_INT_LOW_LEV;
|
|
|
|
break;
|
2008-07-27 10:23:31 +07:00
|
|
|
case IRQ_TYPE_LEVEL_HIGH:
|
2008-07-05 15:02:49 +07:00
|
|
|
edge = GPIO_INT_HIGH_LEV;
|
|
|
|
break;
|
2009-03-12 18:46:41 +07:00
|
|
|
default:
|
2008-07-05 15:02:49 +07:00
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
2012-06-23 02:04:06 +07:00
|
|
|
if (GPIO_EDGE_SEL >= 0) {
|
|
|
|
val = readl(port->base + GPIO_EDGE_SEL);
|
|
|
|
if (edge == GPIO_INT_BOTH_EDGES)
|
GPIO changes for v3.6:
- New driver for AMD-8111 southbridge GPIOs
- New driver for Wolfson Micro Arizona devices
- Propagate device tree parse errors
- Probe deferral finalizations - all expected calls to
GPIO will now hopefully request deferral where apropriate
- Misc updates to TCA6424, WM8994, LPC32xx, PCF857x, Samsung
MXC, OMAP and PCA953X drivers.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)
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lb3Barg+WWm+NW1kmPYnrOJUZXa1ApVHuz8db7OrcUy5kTcUhVTY3DcQzFgG1CZT
H284c9Zm8WaP814jE8SzLMGeFaCuI63xFMNkpnba11Bt+8Cr1I+LjWSd+ttCFdVm
W9t/fMEX1bVpVrbTKMvcwm7AwnoeOUEwJCqAICLe5OE/1mEvanyjNXX4wfFP58jv
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=tujx
-----END PGP SIGNATURE-----
Merge tag 'gpio-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO changes from Linus Walleij:
- New driver for AMD-8111 southbridge GPIOs
- New driver for Wolfson Micro Arizona devices
- Propagate device tree parse errors
- Probe deferral finalizations - all expected calls to GPIO will now
hopefully request deferral where apropriate
- Misc updates to TCA6424, WM8994, LPC32xx, PCF857x, Samsung MXC, OMAP
and PCA953X drivers.
Fix up gpio_idx conflicts in drivers/gpio/gpio-mxc.c
* tag 'gpio-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: of_get_named_gpio_flags() return -EPROBE_DEFER if GPIO not yet available
gpiolib: Defer failed gpio requests by default
MAINTAINERS: add entry OMAP GPIO driver
gpio/pca953x: increase variables size to support 24 bit of data
GPIO: PCA953X: Increase size of invert variable to support 24 bit
gpio/omap: move bank->dbck initialization to omap_gpio_mod_init()
gpio/mxc: use the edge_sel feature if available
gpio: propagate of_parse_phandle_with_args errors
gpio: samsung: add flags specifier to device-tree binding
gpiolib: Add support for Wolfson Microelectronics Arizona class devices
gpio: gpio-lpc32xx: Add gpio_to_irq mapping
gpio: pcf857x: share 8/16 bit access functions
gpio: LPC32xx: Driver cleanup
MAINTAINERS: Add Wolfson gpiolib drivers to the Wolfson entry
gpiolib: wm8994: Convert to devm_kzalloc()
gpiolib: wm8994: Use irq_domain mappings for gpios
gpio: add a driver for GPIO pins found on AMD-8111 south bridge chips
gpio/tca6424: merge I2C transactions, remove cast
gpio/of: fix a typo of comment message
2012-07-27 03:56:38 +07:00
|
|
|
writel(val | (1 << gpio_idx),
|
2012-06-23 02:04:06 +07:00
|
|
|
port->base + GPIO_EDGE_SEL);
|
|
|
|
else
|
GPIO changes for v3.6:
- New driver for AMD-8111 southbridge GPIOs
- New driver for Wolfson Micro Arizona devices
- Propagate device tree parse errors
- Probe deferral finalizations - all expected calls to
GPIO will now hopefully request deferral where apropriate
- Misc updates to TCA6424, WM8994, LPC32xx, PCF857x, Samsung
MXC, OMAP and PCA953X drivers.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=tujx
-----END PGP SIGNATURE-----
Merge tag 'gpio-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO changes from Linus Walleij:
- New driver for AMD-8111 southbridge GPIOs
- New driver for Wolfson Micro Arizona devices
- Propagate device tree parse errors
- Probe deferral finalizations - all expected calls to GPIO will now
hopefully request deferral where apropriate
- Misc updates to TCA6424, WM8994, LPC32xx, PCF857x, Samsung MXC, OMAP
and PCA953X drivers.
Fix up gpio_idx conflicts in drivers/gpio/gpio-mxc.c
* tag 'gpio-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: of_get_named_gpio_flags() return -EPROBE_DEFER if GPIO not yet available
gpiolib: Defer failed gpio requests by default
MAINTAINERS: add entry OMAP GPIO driver
gpio/pca953x: increase variables size to support 24 bit of data
GPIO: PCA953X: Increase size of invert variable to support 24 bit
gpio/omap: move bank->dbck initialization to omap_gpio_mod_init()
gpio/mxc: use the edge_sel feature if available
gpio: propagate of_parse_phandle_with_args errors
gpio: samsung: add flags specifier to device-tree binding
gpiolib: Add support for Wolfson Microelectronics Arizona class devices
gpio: gpio-lpc32xx: Add gpio_to_irq mapping
gpio: pcf857x: share 8/16 bit access functions
gpio: LPC32xx: Driver cleanup
MAINTAINERS: Add Wolfson gpiolib drivers to the Wolfson entry
gpiolib: wm8994: Convert to devm_kzalloc()
gpiolib: wm8994: Use irq_domain mappings for gpios
gpio: add a driver for GPIO pins found on AMD-8111 south bridge chips
gpio/tca6424: merge I2C transactions, remove cast
gpio/of: fix a typo of comment message
2012-07-27 03:56:38 +07:00
|
|
|
writel(val & ~(1 << gpio_idx),
|
2012-06-23 02:04:06 +07:00
|
|
|
port->base + GPIO_EDGE_SEL);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (edge != GPIO_INT_BOTH_EDGES) {
|
GPIO changes for v3.6:
- New driver for AMD-8111 southbridge GPIOs
- New driver for Wolfson Micro Arizona devices
- Propagate device tree parse errors
- Probe deferral finalizations - all expected calls to
GPIO will now hopefully request deferral where apropriate
- Misc updates to TCA6424, WM8994, LPC32xx, PCF857x, Samsung
MXC, OMAP and PCA953X drivers.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)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=tujx
-----END PGP SIGNATURE-----
Merge tag 'gpio-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio
Pull GPIO changes from Linus Walleij:
- New driver for AMD-8111 southbridge GPIOs
- New driver for Wolfson Micro Arizona devices
- Propagate device tree parse errors
- Probe deferral finalizations - all expected calls to GPIO will now
hopefully request deferral where apropriate
- Misc updates to TCA6424, WM8994, LPC32xx, PCF857x, Samsung MXC, OMAP
and PCA953X drivers.
Fix up gpio_idx conflicts in drivers/gpio/gpio-mxc.c
* tag 'gpio-for-v3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
gpio: of_get_named_gpio_flags() return -EPROBE_DEFER if GPIO not yet available
gpiolib: Defer failed gpio requests by default
MAINTAINERS: add entry OMAP GPIO driver
gpio/pca953x: increase variables size to support 24 bit of data
GPIO: PCA953X: Increase size of invert variable to support 24 bit
gpio/omap: move bank->dbck initialization to omap_gpio_mod_init()
gpio/mxc: use the edge_sel feature if available
gpio: propagate of_parse_phandle_with_args errors
gpio: samsung: add flags specifier to device-tree binding
gpiolib: Add support for Wolfson Microelectronics Arizona class devices
gpio: gpio-lpc32xx: Add gpio_to_irq mapping
gpio: pcf857x: share 8/16 bit access functions
gpio: LPC32xx: Driver cleanup
MAINTAINERS: Add Wolfson gpiolib drivers to the Wolfson entry
gpiolib: wm8994: Convert to devm_kzalloc()
gpiolib: wm8994: Use irq_domain mappings for gpios
gpio: add a driver for GPIO pins found on AMD-8111 south bridge chips
gpio/tca6424: merge I2C transactions, remove cast
gpio/of: fix a typo of comment message
2012-07-27 03:56:38 +07:00
|
|
|
reg += GPIO_ICR1 + ((gpio_idx & 0x10) >> 2); /* lower or upper register */
|
|
|
|
bit = gpio_idx & 0xf;
|
2012-06-23 02:04:06 +07:00
|
|
|
val = readl(reg) & ~(0x3 << (bit << 1));
|
|
|
|
writel(val | (edge << (bit << 1)), reg);
|
|
|
|
}
|
|
|
|
|
2012-06-13 08:04:03 +07:00
|
|
|
writel(1 << gpio_idx, port->base + GPIO_ISR);
|
2008-07-05 15:02:49 +07:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2009-03-12 18:46:41 +07:00
|
|
|
static void mxc_flip_edge(struct mxc_gpio_port *port, u32 gpio)
|
|
|
|
{
|
|
|
|
void __iomem *reg = port->base;
|
|
|
|
u32 bit, val;
|
|
|
|
int edge;
|
|
|
|
|
|
|
|
reg += GPIO_ICR1 + ((gpio & 0x10) >> 2); /* lower or upper register */
|
|
|
|
bit = gpio & 0xf;
|
2011-06-05 23:07:55 +07:00
|
|
|
val = readl(reg);
|
2009-03-12 18:46:41 +07:00
|
|
|
edge = (val >> (bit << 1)) & 3;
|
|
|
|
val &= ~(0x3 << (bit << 1));
|
2010-02-06 04:14:37 +07:00
|
|
|
if (edge == GPIO_INT_HIGH_LEV) {
|
2009-03-12 18:46:41 +07:00
|
|
|
edge = GPIO_INT_LOW_LEV;
|
|
|
|
pr_debug("mxc: switch GPIO %d to low trigger\n", gpio);
|
2010-02-06 04:14:37 +07:00
|
|
|
} else if (edge == GPIO_INT_LOW_LEV) {
|
2009-03-12 18:46:41 +07:00
|
|
|
edge = GPIO_INT_HIGH_LEV;
|
|
|
|
pr_debug("mxc: switch GPIO %d to high trigger\n", gpio);
|
2010-02-06 04:14:37 +07:00
|
|
|
} else {
|
2009-03-12 18:46:41 +07:00
|
|
|
pr_err("mxc: invalid configuration for GPIO %d: %x\n",
|
|
|
|
gpio, edge);
|
|
|
|
return;
|
|
|
|
}
|
2011-06-05 23:07:55 +07:00
|
|
|
writel(val | (edge << (bit << 1)), reg);
|
2009-03-12 18:46:41 +07:00
|
|
|
}
|
|
|
|
|
2010-02-09 03:02:30 +07:00
|
|
|
/* handle 32 interrupts in one status register */
|
2008-07-05 15:02:49 +07:00
|
|
|
static void mxc_gpio_irq_handler(struct mxc_gpio_port *port, u32 irq_stat)
|
|
|
|
{
|
2010-02-09 03:02:30 +07:00
|
|
|
while (irq_stat != 0) {
|
|
|
|
int irqoffset = fls(irq_stat) - 1;
|
2008-07-05 15:02:49 +07:00
|
|
|
|
2010-02-09 03:02:30 +07:00
|
|
|
if (port->both_edges & (1 << irqoffset))
|
|
|
|
mxc_flip_edge(port, irqoffset);
|
2009-03-12 18:46:41 +07:00
|
|
|
|
2012-06-13 08:04:03 +07:00
|
|
|
generic_handle_irq(irq_find_mapping(port->domain, irqoffset));
|
2009-03-12 18:46:41 +07:00
|
|
|
|
2010-02-09 03:02:30 +07:00
|
|
|
irq_stat &= ~(1 << irqoffset);
|
2008-07-05 15:02:49 +07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-11-14 17:01:38 +07:00
|
|
|
/* MX1 and MX3 has one interrupt *per* gpio port */
|
2015-09-14 15:42:37 +07:00
|
|
|
static void mx3_gpio_irq_handler(struct irq_desc *desc)
|
2008-07-05 15:02:49 +07:00
|
|
|
{
|
|
|
|
u32 irq_stat;
|
2015-06-04 11:13:15 +07:00
|
|
|
struct mxc_gpio_port *port = irq_desc_get_handler_data(desc);
|
|
|
|
struct irq_chip *chip = irq_desc_get_chip(desc);
|
2011-09-21 20:24:04 +07:00
|
|
|
|
|
|
|
chained_irq_enter(chip, desc);
|
2008-07-05 15:02:49 +07:00
|
|
|
|
2011-06-05 23:07:55 +07:00
|
|
|
irq_stat = readl(port->base + GPIO_ISR) & readl(port->base + GPIO_IMR);
|
2009-04-21 17:39:59 +07:00
|
|
|
|
2008-07-05 15:02:49 +07:00
|
|
|
mxc_gpio_irq_handler(port, irq_stat);
|
2011-09-21 20:24:04 +07:00
|
|
|
|
|
|
|
chained_irq_exit(chip, desc);
|
2008-07-05 15:02:49 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
/* MX2 has one interrupt *for all* gpio ports */
|
2015-09-14 15:42:37 +07:00
|
|
|
static void mx2_gpio_irq_handler(struct irq_desc *desc)
|
2008-07-05 15:02:49 +07:00
|
|
|
{
|
|
|
|
u32 irq_msk, irq_stat;
|
2011-06-05 23:07:55 +07:00
|
|
|
struct mxc_gpio_port *port;
|
2015-06-04 11:13:15 +07:00
|
|
|
struct irq_chip *chip = irq_desc_get_chip(desc);
|
2013-07-18 19:58:06 +07:00
|
|
|
|
|
|
|
chained_irq_enter(chip, desc);
|
2008-07-05 15:02:49 +07:00
|
|
|
|
|
|
|
/* walk through all interrupt status registers */
|
2011-06-05 23:07:55 +07:00
|
|
|
list_for_each_entry(port, &mxc_gpio_ports, node) {
|
|
|
|
irq_msk = readl(port->base + GPIO_IMR);
|
2008-07-05 15:02:49 +07:00
|
|
|
if (!irq_msk)
|
|
|
|
continue;
|
|
|
|
|
2011-06-05 23:07:55 +07:00
|
|
|
irq_stat = readl(port->base + GPIO_ISR) & irq_msk;
|
2008-07-05 15:02:49 +07:00
|
|
|
if (irq_stat)
|
2011-06-05 23:07:55 +07:00
|
|
|
mxc_gpio_irq_handler(port, irq_stat);
|
2008-07-05 15:02:49 +07:00
|
|
|
}
|
2013-07-18 19:58:06 +07:00
|
|
|
chained_irq_exit(chip, desc);
|
2008-07-05 15:02:49 +07:00
|
|
|
}
|
|
|
|
|
2010-10-23 21:12:48 +07:00
|
|
|
/*
|
|
|
|
* Set interrupt number "irq" in the GPIO as a wake-up source.
|
|
|
|
* While system is running, all registered GPIO interrupts need to have
|
|
|
|
* wake-up enabled. When system is suspended, only selected GPIO interrupts
|
|
|
|
* need to have wake-up enabled.
|
|
|
|
* @param irq interrupt source number
|
|
|
|
* @param enable enable as wake-up if equal to non-zero
|
|
|
|
* @return This function returns 0 on success.
|
|
|
|
*/
|
2010-11-29 17:16:23 +07:00
|
|
|
static int gpio_set_wake_irq(struct irq_data *d, u32 enable)
|
2010-10-23 21:12:48 +07:00
|
|
|
{
|
2011-06-07 15:25:37 +07:00
|
|
|
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
|
|
|
|
struct mxc_gpio_port *port = gc->private;
|
2012-06-13 08:04:03 +07:00
|
|
|
u32 gpio_idx = d->hwirq;
|
2010-10-23 21:12:48 +07:00
|
|
|
|
|
|
|
if (enable) {
|
|
|
|
if (port->irq_high && (gpio_idx >= 16))
|
|
|
|
enable_irq_wake(port->irq_high);
|
|
|
|
else
|
|
|
|
enable_irq_wake(port->irq);
|
|
|
|
} else {
|
|
|
|
if (port->irq_high && (gpio_idx >= 16))
|
|
|
|
disable_irq_wake(port->irq_high);
|
|
|
|
else
|
|
|
|
disable_irq_wake(port->irq);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-08-23 20:11:52 +07:00
|
|
|
static int mxc_gpio_init_gc(struct mxc_gpio_port *port, int irq_base)
|
2011-06-07 15:25:37 +07:00
|
|
|
{
|
|
|
|
struct irq_chip_generic *gc;
|
|
|
|
struct irq_chip_type *ct;
|
|
|
|
|
2012-06-13 08:04:03 +07:00
|
|
|
gc = irq_alloc_generic_chip("gpio-mxc", 1, irq_base,
|
2011-06-07 15:25:37 +07:00
|
|
|
port->base, handle_level_irq);
|
2015-08-23 20:11:52 +07:00
|
|
|
if (!gc)
|
|
|
|
return -ENOMEM;
|
2011-06-07 15:25:37 +07:00
|
|
|
gc->private = port;
|
|
|
|
|
|
|
|
ct = gc->chip_types;
|
2011-07-19 20:16:56 +07:00
|
|
|
ct->chip.irq_ack = irq_gc_ack_set_bit;
|
2011-06-07 15:25:37 +07:00
|
|
|
ct->chip.irq_mask = irq_gc_mask_clr_bit;
|
|
|
|
ct->chip.irq_unmask = irq_gc_mask_set_bit;
|
|
|
|
ct->chip.irq_set_type = gpio_set_irq_type;
|
2011-07-19 20:16:56 +07:00
|
|
|
ct->chip.irq_set_wake = gpio_set_wake_irq;
|
2015-08-06 00:23:07 +07:00
|
|
|
ct->chip.flags = IRQCHIP_MASK_ON_SUSPEND;
|
2011-06-07 15:25:37 +07:00
|
|
|
ct->regs.ack = GPIO_ISR;
|
|
|
|
ct->regs.mask = GPIO_IMR;
|
|
|
|
|
|
|
|
irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_NESTED_LOCK,
|
|
|
|
IRQ_NOREQUEST, 0);
|
2015-08-23 20:11:52 +07:00
|
|
|
|
|
|
|
return 0;
|
2011-06-07 15:25:37 +07:00
|
|
|
}
|
2011-04-04 19:29:58 +07:00
|
|
|
|
2012-11-20 01:22:34 +07:00
|
|
|
static void mxc_gpio_get_hw(struct platform_device *pdev)
|
2011-07-06 23:37:41 +07:00
|
|
|
{
|
2011-07-06 23:37:43 +07:00
|
|
|
const struct of_device_id *of_id =
|
|
|
|
of_match_device(mxc_gpio_dt_ids, &pdev->dev);
|
|
|
|
enum mxc_gpio_hwtype hwtype;
|
|
|
|
|
|
|
|
if (of_id)
|
|
|
|
pdev->id_entry = of_id->data;
|
|
|
|
hwtype = pdev->id_entry->driver_data;
|
2011-07-06 23:37:41 +07:00
|
|
|
|
|
|
|
if (mxc_gpio_hwtype) {
|
|
|
|
/*
|
|
|
|
* The driver works with a reasonable presupposition,
|
|
|
|
* that is all gpio ports must be the same type when
|
|
|
|
* running on one soc.
|
|
|
|
*/
|
|
|
|
BUG_ON(mxc_gpio_hwtype != hwtype);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2012-06-23 02:04:06 +07:00
|
|
|
if (hwtype == IMX35_GPIO)
|
|
|
|
mxc_gpio_hwdata = &imx35_gpio_hwdata;
|
|
|
|
else if (hwtype == IMX31_GPIO)
|
2011-07-06 23:37:41 +07:00
|
|
|
mxc_gpio_hwdata = &imx31_gpio_hwdata;
|
|
|
|
else
|
|
|
|
mxc_gpio_hwdata = &imx1_imx21_gpio_hwdata;
|
|
|
|
|
|
|
|
mxc_gpio_hwtype = hwtype;
|
|
|
|
}
|
|
|
|
|
2011-08-13 23:14:02 +07:00
|
|
|
static int mxc_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
|
|
|
|
{
|
|
|
|
struct bgpio_chip *bgc = to_bgpio_chip(gc);
|
|
|
|
struct mxc_gpio_port *port =
|
|
|
|
container_of(bgc, struct mxc_gpio_port, bgc);
|
|
|
|
|
2012-06-13 08:04:03 +07:00
|
|
|
return irq_find_mapping(port->domain, offset);
|
2011-08-13 23:14:02 +07:00
|
|
|
}
|
|
|
|
|
2012-11-20 01:22:34 +07:00
|
|
|
static int mxc_gpio_probe(struct platform_device *pdev)
|
2008-07-05 15:02:49 +07:00
|
|
|
{
|
2011-07-06 23:37:43 +07:00
|
|
|
struct device_node *np = pdev->dev.of_node;
|
2011-06-05 23:07:55 +07:00
|
|
|
struct mxc_gpio_port *port;
|
|
|
|
struct resource *iores;
|
2012-06-13 08:04:03 +07:00
|
|
|
int irq_base;
|
2011-06-07 15:25:37 +07:00
|
|
|
int err;
|
2011-06-05 23:07:55 +07:00
|
|
|
|
2011-07-06 23:37:41 +07:00
|
|
|
mxc_gpio_get_hw(pdev);
|
|
|
|
|
2013-07-09 03:14:39 +07:00
|
|
|
port = devm_kzalloc(&pdev->dev, sizeof(*port), GFP_KERNEL);
|
2011-06-05 23:07:55 +07:00
|
|
|
if (!port)
|
|
|
|
return -ENOMEM;
|
2008-07-05 15:02:49 +07:00
|
|
|
|
2011-06-05 23:07:55 +07:00
|
|
|
iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
2013-07-09 03:14:39 +07:00
|
|
|
port->base = devm_ioremap_resource(&pdev->dev, iores);
|
|
|
|
if (IS_ERR(port->base))
|
|
|
|
return PTR_ERR(port->base);
|
2011-06-05 23:07:55 +07:00
|
|
|
|
|
|
|
port->irq_high = platform_get_irq(pdev, 1);
|
|
|
|
port->irq = platform_get_irq(pdev, 0);
|
2013-07-09 03:14:39 +07:00
|
|
|
if (port->irq < 0)
|
2013-12-21 14:35:57 +07:00
|
|
|
return port->irq;
|
2011-06-05 23:07:55 +07:00
|
|
|
|
|
|
|
/* disable the interrupt and clear the status */
|
|
|
|
writel(0, port->base + GPIO_IMR);
|
|
|
|
writel(~0, port->base + GPIO_ISR);
|
|
|
|
|
2011-07-06 23:37:41 +07:00
|
|
|
if (mxc_gpio_hwtype == IMX21_GPIO) {
|
2012-06-06 16:49:23 +07:00
|
|
|
/*
|
|
|
|
* Setup one handler for all GPIO interrupts. Actually setting
|
|
|
|
* the handler is needed only once, but doing it for every port
|
|
|
|
* is more robust and easier.
|
|
|
|
*/
|
|
|
|
irq_set_chained_handler(port->irq, mx2_gpio_irq_handler);
|
2011-06-05 23:07:55 +07:00
|
|
|
} else {
|
|
|
|
/* setup one handler for each entry */
|
2015-06-17 05:06:40 +07:00
|
|
|
irq_set_chained_handler_and_data(port->irq,
|
|
|
|
mx3_gpio_irq_handler, port);
|
|
|
|
if (port->irq_high > 0)
|
2011-06-05 23:07:55 +07:00
|
|
|
/* setup handler for GPIO 16 to 31 */
|
2015-06-17 05:06:40 +07:00
|
|
|
irq_set_chained_handler_and_data(port->irq_high,
|
|
|
|
mx3_gpio_irq_handler,
|
|
|
|
port);
|
2008-07-05 15:02:49 +07:00
|
|
|
}
|
|
|
|
|
2011-06-06 12:22:41 +07:00
|
|
|
err = bgpio_init(&port->bgc, &pdev->dev, 4,
|
|
|
|
port->base + GPIO_PSR,
|
|
|
|
port->base + GPIO_DR, NULL,
|
2015-04-29 22:35:01 +07:00
|
|
|
port->base + GPIO_GDIR, NULL,
|
|
|
|
BGPIOF_READ_OUTPUT_REG_SET);
|
2011-06-06 12:22:41 +07:00
|
|
|
if (err)
|
2013-07-09 03:14:39 +07:00
|
|
|
goto out_bgio;
|
2011-06-05 23:07:55 +07:00
|
|
|
|
2011-08-13 23:14:02 +07:00
|
|
|
port->bgc.gc.to_irq = mxc_gpio_to_irq;
|
2012-08-05 13:01:26 +07:00
|
|
|
port->bgc.gc.base = (pdev->id < 0) ? of_alias_get_id(np, "gpio") * 32 :
|
|
|
|
pdev->id * 32;
|
2011-06-05 23:07:55 +07:00
|
|
|
|
2011-06-06 12:22:41 +07:00
|
|
|
err = gpiochip_add(&port->bgc.gc);
|
2011-06-05 23:07:55 +07:00
|
|
|
if (err)
|
2011-06-06 12:22:41 +07:00
|
|
|
goto out_bgpio_remove;
|
2011-06-05 23:07:55 +07:00
|
|
|
|
2012-06-13 08:04:03 +07:00
|
|
|
irq_base = irq_alloc_descs(-1, 0, 32, numa_node_id());
|
|
|
|
if (irq_base < 0) {
|
|
|
|
err = irq_base;
|
|
|
|
goto out_gpiochip_remove;
|
|
|
|
}
|
|
|
|
|
|
|
|
port->domain = irq_domain_add_legacy(np, 32, irq_base, 0,
|
|
|
|
&irq_domain_simple_ops, NULL);
|
|
|
|
if (!port->domain) {
|
|
|
|
err = -ENODEV;
|
|
|
|
goto out_irqdesc_free;
|
|
|
|
}
|
2011-07-06 23:37:43 +07:00
|
|
|
|
|
|
|
/* gpio-mxc can be a generic irq chip */
|
2015-08-23 20:11:52 +07:00
|
|
|
err = mxc_gpio_init_gc(port, irq_base);
|
|
|
|
if (err < 0)
|
|
|
|
goto out_irqdomain_remove;
|
2011-07-06 23:37:43 +07:00
|
|
|
|
2011-06-05 23:07:55 +07:00
|
|
|
list_add_tail(&port->node, &mxc_gpio_ports);
|
|
|
|
|
2008-07-05 15:02:49 +07:00
|
|
|
return 0;
|
2011-06-05 23:07:55 +07:00
|
|
|
|
2015-08-23 20:11:52 +07:00
|
|
|
out_irqdomain_remove:
|
|
|
|
irq_domain_remove(port->domain);
|
2012-06-13 08:04:03 +07:00
|
|
|
out_irqdesc_free:
|
|
|
|
irq_free_descs(irq_base, 32);
|
|
|
|
out_gpiochip_remove:
|
2014-07-13 03:30:12 +07:00
|
|
|
gpiochip_remove(&port->bgc.gc);
|
2011-06-06 12:22:41 +07:00
|
|
|
out_bgpio_remove:
|
|
|
|
bgpio_remove(&port->bgc);
|
2013-07-09 03:14:39 +07:00
|
|
|
out_bgio:
|
2011-06-05 23:07:55 +07:00
|
|
|
dev_info(&pdev->dev, "%s failed with errno %d\n", __func__, err);
|
|
|
|
return err;
|
2008-07-05 15:02:49 +07:00
|
|
|
}
|
2011-06-05 23:07:55 +07:00
|
|
|
|
|
|
|
static struct platform_driver mxc_gpio_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "gpio-mxc",
|
2011-07-06 23:37:43 +07:00
|
|
|
.of_match_table = mxc_gpio_dt_ids,
|
2011-06-05 23:07:55 +07:00
|
|
|
},
|
|
|
|
.probe = mxc_gpio_probe,
|
2011-07-06 23:37:41 +07:00
|
|
|
.id_table = mxc_gpio_devtype,
|
2011-06-05 23:07:55 +07:00
|
|
|
};
|
|
|
|
|
|
|
|
static int __init gpio_mxc_init(void)
|
|
|
|
{
|
|
|
|
return platform_driver_register(&mxc_gpio_driver);
|
|
|
|
}
|
|
|
|
postcore_initcall(gpio_mxc_init);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Freescale Semiconductor, "
|
|
|
|
"Daniel Mack <danielncaiaq.de>, "
|
|
|
|
"Juergen Beisert <kernel@pengutronix.de>");
|
|
|
|
MODULE_DESCRIPTION("Freescale MXC GPIO");
|
|
|
|
MODULE_LICENSE("GPL");
|