diff mbox

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

Message ID 1446047056-16801-3-git-send-email-dirk.eibach@gdsys.cc
State Changes Requested
Delegated to: Stefan Roese
Headers show

Commit Message

Dirk Eibach Oct. 28, 2015, 3:44 p.m. UTC 
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(-)

Comments

Stefan Roese Oct. 28, 2015, 4:41 p.m. UTC | #1 
Hi Dirk,

On 28.10.2015 16:44, dirk.eibach@gdsys.cc wrote:
> From: Dirk Eibach <dirk.eibach@gdsys.cc>
>
> mvebu gpio is based on kirkwood.
>
> Signed-off-by: Dirk Eibach <dirk.eibach@gdsys.cc>

Again, I would really like to see a DM based driver for this.
It shouldn't be too much work. GPIO is perhaps the simplest
driver here. Perhaps you can spare some cycles for such a
task...

Thanks,
Stefan
diff mbox

Patch

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@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