[U-Boot] [PATCH v0 2/5] arm: mvebu: Add gpio support

dirk.eibach at gdsys.cc
2015-10-28T15:44:13Z

From: Dirk Eibach <dirk.eibach@gdsys.cc>

mvebu gpio is based on kirkwood.

Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>
---

arch/arm/mach-mvebu/include/mach/gpio.h | 41 +++++++++++++++++++++++++++++++--
1 file changed, 39 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-mvebu/include/mach/gpio.h b/arch/arm/mach-mvebu/include/mach/gpio.h
index 09e3c50..cd869ee 100644
--- a/arch/arm/mach-mvebu/include/mach/gpio.h
+++ b/arch/arm/mach-mvebu/include/mach/gpio.h
@@ -1,10 +1,47 @@
/*
- * SPDX-License-Identifier: GPL-2.0+
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/*
+ * Based on (mostly copied from) plat-orion based Linux 2.6 kernel driver.
+ * Removed kernel level irq handling. Took some macros from kernel to
+ * allow build.
+ *
+ * Dieter Kiermaier dk-arm-linux at gmx.de
*/

#ifndef __MACH_MVEBU_GPIO_H
#define __MACH_MVEBU_GPIO_H

-/* Empty file - sdhci requires this. */
+/* got from kernel include/linux/bitops.h */
+#define BITS_PER_BYTE 8
+#define BITS_TO_LONGS(nr) DIV_ROUND_UP(nr, BITS_PER_BYTE * sizeof(long))
+
+#define GPIO_MAX 59
+#define GPIO_OFF(pin) (((pin) >> 5) ? 0x0040 : 0x0000)
+#define GPIO_OUT(pin) (MVEBU_GPIO0_BASE + GPIO_OFF(pin) + 0x00)
+#define GPIO_IO_CONF(pin) (MVEBU_GPIO0_BASE + GPIO_OFF(pin) + 0x04)
+#define GPIO_BLINK_EN(pin) (MVEBU_GPIO0_BASE + GPIO_OFF(pin) + 0x08)
+#define GPIO_IN_POL(pin) (MVEBU_GPIO0_BASE + GPIO_OFF(pin) + 0x0c)
+#define GPIO_DATA_IN(pin) (MVEBU_GPIO0_BASE + GPIO_OFF(pin) + 0x10)
+#define GPIO_EDGE_CAUSE(pin) (MVEBU_GPIO0_BASE + GPIO_OFF(pin) + 0x14)
+#define GPIO_EDGE_MASK(pin) (MVEBU_GPIO0_BASE + GPIO_OFF(pin) + 0x18)
+#define GPIO_LEVEL_MASK(pin) (MVEBU_GPIO0_BASE + GPIO_OFF(pin) + 0x1c)
+
+/*
+ * Kirkwood-specific GPIO API
+ */
+
+void kw_gpio_set_valid(unsigned pin, int mode);
+int kw_gpio_is_valid(unsigned pin, int mode);
+int kw_gpio_direction_input(unsigned pin);
+int kw_gpio_direction_output(unsigned pin, int value);
+int kw_gpio_get_value(unsigned pin);
+void kw_gpio_set_value(unsigned pin, int value);
+void kw_gpio_set_blink(unsigned pin, int blink);
+void kw_gpio_set_unused(unsigned pin);
+
+#define GPIO_INPUT_OK (1 << 0)
+#define GPIO_OUTPUT_OK (1 << 1)

#endif
--
2.1.3