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Message-Id: <1271175030-3635-1-git-send-email-Dinh.Nguyen@freescale.com>
Date: Tue, 13 Apr 2010 11:10:24 -0500
From: Dinh.Nguyen@...escale.com
To: linux-kernel@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org, linux@....linux.org.uk,
s.hauer@...gutronix.de, valentin.longchamp@...l.ch,
daniel@...aq.de, grant.likely@...retlab.ca,
r.herring@...escale.com, bryan.wu@...onical.com,
amit.kucheria@...onical.com,
Dinh Nguyen <Dinh.Nguyen@...escale.com>
Subject: [PATCH 2.6.34-rc4 1/8] mx5: Add registration of GPIOs for MX51 Babbage board.
From: Dinh Nguyen <Dinh.Nguyen@...escale.com>
Update /plat-mxc/gpio.c to support Freescale's MX51 Babbage HW.
This patch applies to 2.6.34-rc4.
Signed-off-by: Dinh Nguyen <Dinh.Nguyen@...escale.com>
---
arch/arm/mach-mx5/board-mx51_babbage.c | 5 +++-
arch/arm/mach-mx5/devices.c | 33 ++++++++++++++++++++++++++++++-
arch/arm/plat-mxc/gpio.c | 32 +++++++++++++++++++++++++-----
3 files changed, 61 insertions(+), 9 deletions(-)
diff --git a/arch/arm/mach-mx5/board-mx51_babbage.c b/arch/arm/mach-mx5/board-mx51_babbage.c
index ee67a71..afbe400 100644
--- a/arch/arm/mach-mx5/board-mx51_babbage.c
+++ b/arch/arm/mach-mx5/board-mx51_babbage.c
@@ -1,5 +1,5 @@
/*
- * Copyright 2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright (C) 2009-2010 Amit Kucheria <amit.kucheria@...onical.com>
*
* The code contained herein is licensed under the GNU General Public
@@ -12,6 +12,7 @@
#include <linux/init.h>
#include <linux/platform_device.h>
+#include <linux/gpio.h>
#include <mach/common.h>
#include <mach/hardware.h>
@@ -75,6 +76,8 @@ static void __init mxc_board_init(void)
ARRAY_SIZE(mx51babbage_pads));
mxc_init_imx_uart();
platform_add_devices(devices, ARRAY_SIZE(devices));
+
+ mxc_register_gpios();
}
static void __init mx51_babbage_timer_init(void)
diff --git a/arch/arm/mach-mx5/devices.c b/arch/arm/mach-mx5/devices.c
index d6fd396..73f2342 100644
--- a/arch/arm/mach-mx5/devices.c
+++ b/arch/arm/mach-mx5/devices.c
@@ -1,5 +1,6 @@
/*
* Copyright 2009 Amit Kucheria <amit.kucheria@...onical.com>
+ * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
@@ -11,7 +12,9 @@
#include <linux/platform_device.h>
#include <mach/hardware.h>
+#include <mach/gpio.h>
#include <mach/imx-uart.h>
+#include <mach/irqs.h>
static struct resource uart0[] = {
{
@@ -89,8 +92,34 @@ struct platform_device mxc_fec_device = {
.resource = mxc_fec_resources,
};
-/* Dummy definition to allow compiling in AVIC and TZIC simultaneously */
+struct mxc_gpio_port mxc_gpio_ports[] = {
+ {
+ .chip.label = "gpio-0",
+ .base = MX51_IO_ADDRESS(MX51_GPIO1_BASE_ADDR),
+ .irq = MX51_MXC_INT_GPIO1_LOW,
+ .virtual_irq_start = MXC_GPIO_IRQ_START
+ },
+ {
+ .chip.label = "gpio-1",
+ .base = MX51_IO_ADDRESS(MX51_GPIO2_BASE_ADDR),
+ .irq = MX51_MXC_INT_GPIO2_LOW,
+ .virtual_irq_start = MXC_GPIO_IRQ_START + 32 * 1
+ },
+ {
+ .chip.label = "gpio-2",
+ .base = MX51_IO_ADDRESS(MX51_GPIO3_BASE_ADDR),
+ .irq = MX51_MXC_INT_GPIO3_LOW,
+ .virtual_irq_start = MXC_GPIO_IRQ_START + 32 * 2
+ },
+ {
+ .chip.label = "gpio-3",
+ .base = MX51_IO_ADDRESS(MX51_GPIO4_BASE_ADDR),
+ .irq = MX51_MXC_INT_GPIO4_LOW,
+ .virtual_irq_start = MXC_GPIO_IRQ_START + 32 * 3
+ },
+};
+
int __init mxc_register_gpios(void)
{
- return 0;
+ return mxc_gpio_init(mxc_gpio_ports, 4);
}
diff --git a/arch/arm/plat-mxc/gpio.c b/arch/arm/plat-mxc/gpio.c
index 70b2389..1df23b2 100644
--- a/arch/arm/plat-mxc/gpio.c
+++ b/arch/arm/plat-mxc/gpio.c
@@ -3,7 +3,7 @@
* Copyright 2008 Juergen Beisert, kernel@...gutronix.de
*
* Based on code from Freescale,
- * Copyright 2004-2006 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright (C) 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -38,7 +38,6 @@ static int gpio_table_size;
#define GPIO_ICR2 (cpu_is_mx1_mx2() ? 0x2C : 0x10)
#define GPIO_IMR (cpu_is_mx1_mx2() ? 0x30 : 0x14)
#define GPIO_ISR (cpu_is_mx1_mx2() ? 0x34 : 0x18)
-#define GPIO_ISR (cpu_is_mx1_mx2() ? 0x34 : 0x18)
#define GPIO_INT_LOW_LEV (cpu_is_mx1_mx2() ? 0x3 : 0x0)
#define GPIO_INT_HIGH_LEV (cpu_is_mx1_mx2() ? 0x2 : 0x1)
@@ -171,6 +170,25 @@ static void mxc_gpio_irq_handler(struct mxc_gpio_port *port, u32 irq_stat)
}
}
+/* one interrupt *per* gpio port */
+static void mx5_gpio_irq_handler(u32 irq, struct irq_desc *desc)
+{
+ u32 irq_stat;
+ u32 mask = 0xFFFFFFFF;
+ struct mxc_gpio_port *port = (struct mxc_gpio_port *)get_irq_data(irq);
+
+#ifdef MXC_GPIO_SPLIT_IRQ_2
+ if (irq == port->irq)
+ mask = 0x0000FFFF;
+ else
+ mask = 0xFFFF0000;
+#endif
+
+ irq_stat = __raw_readl(port->base + GPIO_ISR) &
+ (__raw_readl(port->base + GPIO_IMR) & mask);
+ mxc_gpio_irq_handler(port, irq_stat);
+}
+
/* MX1 and MX3 has one interrupt *per* gpio port */
static void mx3_gpio_irq_handler(u32 irq, struct irq_desc *desc)
{
@@ -289,11 +307,13 @@ int __init mxc_gpio_init(struct mxc_gpio_port *port, int cnt)
/* its a serious configuration bug when it fails */
BUG_ON( gpiochip_add(&port[i].chip) < 0 );
- if (cpu_is_mx1() || cpu_is_mx3() || cpu_is_mx25()) {
- /* setup one handler for each entry */
+ /* setup one handler for each entry */
+ if (cpu_is_mx1() || cpu_is_mx3() || cpu_is_mx25())
set_irq_chained_handler(port[i].irq, mx3_gpio_irq_handler);
- set_irq_data(port[i].irq, &port[i]);
- }
+ else if (cpu_is_mx51())
+ set_irq_chained_handler(port[i].irq, mx5_gpio_irq_handler);
+
+ set_irq_data(port[i].irq, &port[i]);
}
if (cpu_is_mx2()) {
--
1.6.0.4
--
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