From d8a593c68bac7b9d9b26af6fa8c392671213ce93 Mon Sep 17 00:00:00 2001
From: Thomas Chou <thomas@wytron.com.tw>
Date: Mon, 27 Dec 2010 10:46:01 +0800
Subject: [PATCH] nios2: add gpio_is_valid
Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Signed-off-by: Scott McNutt <smcnutt@psyent.com>
---
arch/nios2/include/asm/gpio.h | 6 ++++++
board/altera/nios2-generic/custom_fpga.h | 1 +
board/altera/nios2-generic/gpio.c | 6 ++++++
3 files changed, 13 insertions(+)
diff --git a/arch/nios2/include/asm/gpio.h b/arch/nios2/include/asm/gpio.h
index 36a71324d7..4b21c8f7f2 100644
--- a/arch/nios2/include/asm/gpio.h
+++ b/arch/nios2/include/asm/gpio.h
@@ -52,6 +52,11 @@ static inline void gpio_set_value(unsigned gpio, int value)
{
writel(value ? 3 : 2, CONFIG_SYS_GPIO_BASE + (gpio << 2));
}
+
+static inline int gpio_is_valid(int number)
+{
+ return ((unsigned)number) < CONFIG_SYS_GPIO_WIDTH;
+}
#else
extern int gpio_request(unsigned gpio, const char *label);
extern int gpio_free(unsigned gpio);
@@ -59,6 +64,7 @@ extern int gpio_direction_input(unsigned gpio);
extern int gpio_direction_output(unsigned gpio, int value);
extern int gpio_get_value(unsigned gpio);
extern void gpio_set_value(unsigned gpio, int value);
+extern int gpio_is_valid(int number);
#endif /* CONFIG_SYS_GPIO_BASE */
#endif /* _ASM_NIOS2_GPIO_H_ */
diff --git a/board/altera/nios2-generic/custom_fpga.h b/board/altera/nios2-generic/custom_fpga.h
index a11add5591..f7f38535fa 100644
--- a/board/altera/nios2-generic/custom_fpga.h
+++ b/board/altera/nios2-generic/custom_fpga.h
@@ -50,6 +50,7 @@
/* led_pio.s1 is a altera_avalon_pio */
#define LED_PIO_BASE 0x82120870
+#define LED_PIO_WIDTH 8
/* high_res_timer.s1 is a altera_avalon_timer */
#define CONFIG_SYS_TIMER_BASE 0x82120820
diff --git a/board/altera/nios2-generic/gpio.c b/board/altera/nios2-generic/gpio.c
index 8c639ce360..4a30564358 100644
--- a/board/altera/nios2-generic/gpio.c
+++ b/board/altera/nios2-generic/gpio.c
@@ -10,6 +10,7 @@
#ifndef CONFIG_SYS_GPIO_BASE
#define ALTERA_PIO_BASE LED_PIO_BASE
+#define ALTERA_PIO_WIDTH LED_PIO_WIDTH
#define ALTERA_PIO_DATA (ALTERA_PIO_BASE + 0)
#define ALTERA_PIO_DIR (ALTERA_PIO_BASE + 4)
static u32 pio_data_reg;
@@ -62,4 +63,9 @@ void gpio_set_value(unsigned gpio, int value)
pio_data_reg &= ~mask;
writel(pio_data_reg, ALTERA_PIO_DATA);
}
+
+int gpio_is_valid(int number)
+{
+ return ((unsigned)number) < ALTERA_PIO_WIDTH;
+}
#endif
--
2.39.5