generic GPIO support for the Freescale Coldfire 5307.
sfking@fdwdc.com [Sat, 20 Jun 2009 01:11:09 +0000 (18:11 -0700)]
Add support for the 5307.

Signed-off-by: Steven King <sfking@fdwdc.com>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>

arch/m68k/include/asm/m5307sim.h
arch/m68knommu/platform/5307/Makefile
arch/m68knommu/platform/5307/gpio.c [new file with mode: 0644]

index 5886728..6a1870c 100644 (file)
 #define MCFSIM_DACR1           0x110           /* DRAM 1 Addr and Ctrl (r/w) */
 #define MCFSIM_DMR1            0x114           /* DRAM 1 Mask reg (r/w) */
 
-#define        MCFSIM_PADDR            0x244           /* Parallel Direction (r/w) */
-#define        MCFSIM_PADAT            0x248           /* Parallel Data (r/w) */
+#define        MCFSIM_PADDR            (MCF_MBAR + 0x244)
+#define        MCFSIM_PADAT            (MCF_MBAR + 0x248)
+
+/*
+ * Generic GPIO support
+ */
+#define MCFGPIO_PIN_MAX                        16
+#define MCFGPIO_IRQ_MAX                        -1
+#define MCFGPIO_IRQ_VECBASE            -1
 
 
 /* Definition offset address for CS2-7  -- old mask 5307 */
index cfd5868..667db65 100644 (file)
@@ -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/5307/gpio.c b/arch/m68knommu/platform/5307/gpio.c
new file mode 100644 (file)
index 0000000..8da5880
--- /dev/null
@@ -0,0 +1,49 @@
+/*
+ * Coldfire generic GPIO support
+ *
+ * (C) Copyright 2009, Steven King <sfking@fdwdc.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                  = "PP",
+                       .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                  = 16,
+               },
+               .pddr                           = MCFSIM_PADDR,
+               .podr                           = MCFSIM_PADAT,
+               .ppdr                           = MCFSIM_PADAT,
+       },
+};
+
+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);