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Message-Id: <1245460272-4329-7-git-send-email-sfking@fdwdc.com>
Date: Fri, 19 Jun 2009 18:11:05 -0700
From: sfking@...dc.com
To: linux-kernel@...r.kernel.org
Cc: uclinux-dev@...inux.org, linux-m68k@...r.kernel.org,
gerg@...pgear.com, Steven King <sfking@...dc.com>
Subject: [PATCH 06/13] generic GPIO support for the Freescale Coldfire 5249.
Add support for the 5249.
Signed-off-by: Steven King <sfking@...dc.com>
---
arch/m68k/include/asm/m5249sim.h | 23 +++++++-----
arch/m68knommu/platform/5249/Makefile | 2 +-
arch/m68knommu/platform/5249/gpio.c | 65 +++++++++++++++++++++++++++++++++
3 files changed, 80 insertions(+), 10 deletions(-)
create mode 100644 arch/m68knommu/platform/5249/gpio.c
diff --git a/arch/m68k/include/asm/m5249sim.h b/arch/m68k/include/asm/m5249sim.h
index 366eb86..2c23a83 100644
--- a/arch/m68k/include/asm/m5249sim.h
+++ b/arch/m68k/include/asm/m5249sim.h
@@ -73,14 +73,14 @@
/*
* General purpose IO registers (in MBAR2).
*/
-#define MCFSIM2_GPIOREAD 0x0 /* GPIO read values */
-#define MCFSIM2_GPIOWRITE 0x4 /* GPIO write values */
-#define MCFSIM2_GPIOENABLE 0x8 /* GPIO enabled */
-#define MCFSIM2_GPIOFUNC 0xc /* GPIO function */
-#define MCFSIM2_GPIO1READ 0xb0 /* GPIO1 read values */
-#define MCFSIM2_GPIO1WRITE 0xb4 /* GPIO1 write values */
-#define MCFSIM2_GPIO1ENABLE 0xb8 /* GPIO1 enabled */
-#define MCFSIM2_GPIO1FUNC 0xbc /* GPIO1 function */
+#define MCFSIM2_GPIOREAD (MCF_MBAR2 + 0x000) /* GPIO read values */
+#define MCFSIM2_GPIOWRITE (MCF_MBAR2 + 0x004) /* GPIO write values */
+#define MCFSIM2_GPIOENABLE (MCF_MBAR2 + 0x008) /* GPIO enabled */
+#define MCFSIM2_GPIOFUNC (MCF_MBAR2 + 0x00C) /* GPIO function */
+#define MCFSIM2_GPIO1READ (MCF_MBAR2 + 0x0B0) /* GPIO1 read values */
+#define MCFSIM2_GPIO1WRITE (MCF_MBAR2 + 0x0B4) /* GPIO1 write values */
+#define MCFSIM2_GPIO1ENABLE (MCF_MBAR2 + 0x0B8) /* GPIO1 enabled */
+#define MCFSIM2_GPIO1FUNC (MCF_MBAR2 + 0x0BC) /* GPIO1 function */
#define MCFSIM2_GPIOINTSTAT 0xc0 /* GPIO interrupt status */
#define MCFSIM2_GPIOINTCLEAR 0xc0 /* GPIO interrupt clear */
@@ -100,7 +100,12 @@
#define MCFSIM2_IDECONFIG1 0x18c /* IDEconfig1 */
#define MCFSIM2_IDECONFIG2 0x190 /* IDEconfig2 */
-
+/*
+ * Generic GPIO support
+ */
+#define MCFGPIO_PIN_MAX 64
+#define MCFGPIO_IRQ_MAX -1
+#define MCFGPIO_IRQ_VECBASE -1
/*
* Macro to set IMR register. It is 32 bits on the 5249.
*/
diff --git a/arch/m68knommu/platform/5249/Makefile b/arch/m68knommu/platform/5249/Makefile
index a439d9a..113c333 100644
--- a/arch/m68knommu/platform/5249/Makefile
+++ b/arch/m68knommu/platform/5249/Makefile
@@ -14,5 +14,5 @@
asflags-$(CONFIG_FULLDEBUG) := -DDEBUGGER_COMPATIBLE_CACHE=1
-obj-y := config.o
+obj-y := config.o gpio.o
diff --git a/arch/m68knommu/platform/5249/gpio.c b/arch/m68knommu/platform/5249/gpio.c
new file mode 100644
index 0000000..69e7866
--- /dev/null
+++ b/arch/m68knommu/platform/5249/gpio.c
@@ -0,0 +1,65 @@
+/*
+ * Coldfire generic GPIO support
+ *
+ * (C) Copyright 2009, Steven King <sfking@...dc.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 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+*/
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+
+#include <asm/coldfire.h>
+#include <asm/mcfsim.h>
+#include <asm/mcfgpio.h>
+
+static struct mcf_gpio_chip mcf_gpio_chips[] = {
+ {
+ .gpio_chip = {
+ .label = "GPIO0",
+ .request = mcf_gpio_request,
+ .free = mcf_gpio_free,
+ .direction_input = mcf_gpio_direction_input,
+ .direction_output = mcf_gpio_direction_output,
+ .get = mcf_gpio_get_value,
+ .set = mcf_gpio_set_value,
+ .ngpio = 32,
+ },
+ .pddr = MCFSIM2_GPIOENABLE,
+ .podr = MCFSIM2_GPIOWRITE,
+ .ppdr = MCFSIM2_GPIOREAD,
+ },
+ {
+ .gpio_chip = {
+ .label = "GPIO1",
+ .request = mcf_gpio_request,
+ .free = mcf_gpio_free,
+ .direction_input = mcf_gpio_direction_input,
+ .direction_output = mcf_gpio_direction_output,
+ .get = mcf_gpio_get_value,
+ .set = mcf_gpio_set_value,
+ .base = 32,
+ .ngpio = 32,
+ },
+ .pddr = MCFSIM2_GPIO1ENABLE,
+ .podr = MCFSIM2_GPIO1WRITE,
+ .ppdr = MCFSIM2_GPIO1READ,
+ },
+};
+
+static int __init mcf_gpio_init(void)
+{
+ unsigned i = 0;
+ while (i < ARRAY_SIZE(mcf_gpio_chips))
+ (void)gpiochip_add((struct gpio_chip *)&mcf_gpio_chips[i++]);
+ return 0;
+}
+
+core_initcall(mcf_gpio_init);
--
1.5.6.5
--
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