From a972b8d701814317be2b8bcca4103f37bcbb467c Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
Date: Sun, 3 Apr 2011 04:40:46 -0400
Subject: gpio: generalize for all generic gpio providers

The Blackfin gpio command isn't terribly Blackfin-specific.  So generalize
the few pieces into two new optional helpers:
	name_to_gpio() - turn a string name into a GPIO #
	gpio_status() - display current pin bindings (think /proc/gpio)

Once these pieces are pulled out, we can relocate the cmd_gpio.c into the
common directory.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
 arch/blackfin/include/asm/gpio.h | 53 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

(limited to 'arch/blackfin/include')

diff --git a/arch/blackfin/include/asm/gpio.h b/arch/blackfin/include/asm/gpio.h
index b650ef0800..9c0e5d1954 100644
--- a/arch/blackfin/include/asm/gpio.h
+++ b/arch/blackfin/include/asm/gpio.h
@@ -196,6 +196,59 @@ static inline int gpio_is_valid(int number)
 	return number >= 0 && number < MAX_BLACKFIN_GPIOS;
 }
 
+#include <linux/ctype.h>
+
+static inline int name_to_gpio(const char *name)
+{
+	int port_base;
+
+	if (tolower(*name) == 'p') {
+		++name;
+
+		switch (tolower(*name)) {
+#ifdef GPIO_PA0
+		case 'a': port_base = GPIO_PA0; break;
+#endif
+#ifdef GPIO_PB0
+		case 'b': port_base = GPIO_PB0; break;
+#endif
+#ifdef GPIO_PC0
+		case 'c': port_base = GPIO_PC0; break;
+#endif
+#ifdef GPIO_PD0
+		case 'd': port_base = GPIO_PD0; break;
+#endif
+#ifdef GPIO_PE0
+		case 'e': port_base = GPIO_PE0; break;
+#endif
+#ifdef GPIO_PF0
+		case 'f': port_base = GPIO_PF0; break;
+#endif
+#ifdef GPIO_PG0
+		case 'g': port_base = GPIO_PG0; break;
+#endif
+#ifdef GPIO_PH0
+		case 'h': port_base = GPIO_PH0; break;
+#endif
+#ifdef GPIO_PI0
+		case 'i': port_base = GPIO_PI0; break;
+#endif
+#ifdef GPIO_PJ
+		case 'j': port_base = GPIO_PJ0; break;
+#endif
+		default:  return -1;
+		}
+
+		++name;
+	} else
+		port_base = 0;
+
+	return port_base + simple_strtoul(name, NULL, 10);
+}
+#define name_to_gpio(n) name_to_gpio(n)
+
+#define gpio_status() bfin_gpio_labels()
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* __ARCH_BLACKFIN_GPIO_H__ */
-- 
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