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authorThomas Chou <thomas@wytron.com.tw>2010-12-27 10:46:01 +0800
committerScott McNutt <smcnutt@psyent.com>2011-02-08 08:29:53 -0500
commitd8a593c68bac7b9d9b26af6fa8c392671213ce93 (patch)
tree837a43ae4ef7ac2e87c1facbb480ca8d5ba21656 /board/altera
parent85debefaf2d3d0dea800fa84bfe0e9823bc03d89 (diff)
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nios2: add gpio_is_valid
Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
Diffstat (limited to 'board/altera')
-rw-r--r--board/altera/nios2-generic/custom_fpga.h1
-rw-r--r--board/altera/nios2-generic/gpio.c6
2 files changed, 7 insertions, 0 deletions
diff --git a/board/altera/nios2-generic/custom_fpga.h b/board/altera/nios2-generic/custom_fpga.h
index a11add5..f7f3853 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 8c639ce..4a30564 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