[U-Boot] [PATCH 0/2] DA8xx: add generic GPIO driver

[U-Boot] [PATCH 0/2] DA8xx: add generic GPIO driver

[Laurence Withers]

This adds a generic GPIO driver fulfilling the <asm/gpio.h> interface for the
TI DaVinci DA8xx CPU.

[U-Boot] [PATCH 1/2] DaVinci: rename gpio_defs.h to gpio.h

[Laurence Withers]

In preparation for a generic GPIO driver for the DA8xx processors,
rename <asm/arch/gpio_defs.h> to <asm/arch/gpio.h> and fix up all files
which include it.

Signed-off-by: Laurence Withers <lwithers@guralp.com>
---
 arch/arm/include/asm/arch-davinci/gpio.h      |   66 +++++++++++++++++++++++++
 arch/arm/include/asm/arch-davinci/gpio_defs.h |   66 -------------------------
 board/davinci/dm355leopard/dm355leopard.c     |    2 +-
 board/davinci/dm365evm/dm365evm.c             |    2 +-
 drivers/usb/musb/da8xx.h                      |    2 +-
 5 files changed, 69 insertions(+), 69 deletions(-)
 create mode 100644 arch/arm/include/asm/arch-davinci/gpio.h
 delete mode 100644 arch/arm/include/asm/arch-davinci/gpio_defs.h

diff --git a/arch/arm/include/asm/arch-davinci/gpio.h b/arch/arm/include/asm/arch-davinci/gpio.h
new file mode 100644
index 0000000..1be2ac2
--- /dev/null
+++ b/arch/arm/include/asm/arch-davinci/gpio.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2009 Texas Instruments Incorporated
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#ifndef _GPIO_DEFS_H_
+#define _GPIO_DEFS_H_
+
+#ifndef CONFIG_SOC_DA8XX
+#define DAVINCI_GPIO_BINTEN	0x01C67008
+#define DAVINCI_GPIO_BANK01	0x01C67010
+#define DAVINCI_GPIO_BANK23	0x01C67038
+#define DAVINCI_GPIO_BANK45	0x01C67060
+#define DAVINCI_GPIO_BANK67	0x01C67088
+
+#else /* CONFIG_SOC_DA8XX */
+#define DAVINCI_GPIO_BINTEN	0x01E26008
+#define DAVINCI_GPIO_BANK01	0x01E26010
+#define DAVINCI_GPIO_BANK23	0x01E26038
+#define DAVINCI_GPIO_BANK45	0x01E26060
+#define DAVINCI_GPIO_BANK67	0x01E26088
+#endif /* CONFIG_SOC_DA8XX */
+
+struct davinci_gpio {
+	unsigned int dir;
+	unsigned int out_data;
+	unsigned int set_data;
+	unsigned int clr_data;
+	unsigned int in_data;
+	unsigned int set_rising;
+	unsigned int clr_rising;
+	unsigned int set_falling;
+	unsigned int clr_falling;
+	unsigned int intstat;
+};
+
+struct davinci_gpio_bank {
+	int num_gpio;
+	unsigned int irq_num;
+	unsigned int irq_mask;
+	unsigned long *in_use;
+	unsigned long base;
+};
+
+#define davinci_gpio_bank01 ((struct davinci_gpio *)DAVINCI_GPIO_BANK01)
+#define davinci_gpio_bank23 ((struct davinci_gpio *)DAVINCI_GPIO_BANK23)
+#define davinci_gpio_bank45 ((struct davinci_gpio *)DAVINCI_GPIO_BANK45)
+#define davinci_gpio_bank67 ((struct davinci_gpio *)DAVINCI_GPIO_BANK67)
+
+#endif
diff --git a/arch/arm/include/asm/arch-davinci/gpio_defs.h b/arch/arm/include/asm/arch-davinci/gpio_defs.h
deleted file mode 100644
index 1be2ac2..0000000
--- a/arch/arm/include/asm/arch-davinci/gpio_defs.h
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * Copyright (C) 2009 Texas Instruments Incorporated
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-#ifndef _GPIO_DEFS_H_
-#define _GPIO_DEFS_H_
-
-#ifndef CONFIG_SOC_DA8XX
-#define DAVINCI_GPIO_BINTEN	0x01C67008
-#define DAVINCI_GPIO_BANK01	0x01C67010
-#define DAVINCI_GPIO_BANK23	0x01C67038
-#define DAVINCI_GPIO_BANK45	0x01C67060
-#define DAVINCI_GPIO_BANK67	0x01C67088
-
-#else /* CONFIG_SOC_DA8XX */
-#define DAVINCI_GPIO_BINTEN	0x01E26008
-#define DAVINCI_GPIO_BANK01	0x01E26010
-#define DAVINCI_GPIO_BANK23	0x01E26038
-#define DAVINCI_GPIO_BANK45	0x01E26060
-#define DAVINCI_GPIO_BANK67	0x01E26088
-#endif /* CONFIG_SOC_DA8XX */
-
-struct davinci_gpio {
-	unsigned int dir;
-	unsigned int out_data;
-	unsigned int set_data;
-	unsigned int clr_data;
-	unsigned int in_data;
-	unsigned int set_rising;
-	unsigned int clr_rising;
-	unsigned int set_falling;
-	unsigned int clr_falling;
-	unsigned int intstat;
-};
-
-struct davinci_gpio_bank {
-	int num_gpio;
-	unsigned int irq_num;
-	unsigned int irq_mask;
-	unsigned long *in_use;
-	unsigned long base;
-};
-
-#define davinci_gpio_bank01 ((struct davinci_gpio *)DAVINCI_GPIO_BANK01)
-#define davinci_gpio_bank23 ((struct davinci_gpio *)DAVINCI_GPIO_BANK23)
-#define davinci_gpio_bank45 ((struct davinci_gpio *)DAVINCI_GPIO_BANK45)
-#define davinci_gpio_bank67 ((struct davinci_gpio *)DAVINCI_GPIO_BANK67)
-
-#endif
diff --git a/board/davinci/dm355leopard/dm355leopard.c b/board/davinci/dm355leopard/dm355leopard.c
index 0ee0d11..0ad5678 100644
--- a/board/davinci/dm355leopard/dm355leopard.c
+++ b/board/davinci/dm355leopard/dm355leopard.c
@@ -20,7 +20,7 @@
 #include <nand.h>
 #include <asm/io.h>
 #include <asm/arch/hardware.h>
-#include <asm/arch/gpio_defs.h>
+#include <asm/arch/gpio.h>
 #include <asm/arch/nand_defs.h>
 #include <asm/arch/davinci_misc.h>
 #include <net.h>
diff --git a/board/davinci/dm365evm/dm365evm.c b/board/davinci/dm365evm/dm365evm.c
index 5fb7611..ac54106 100644
--- a/board/davinci/dm365evm/dm365evm.c
+++ b/board/davinci/dm365evm/dm365evm.c
@@ -22,7 +22,7 @@
 #include <asm/arch/hardware.h>
 #include <asm/arch/emif_defs.h>
 #include <asm/arch/nand_defs.h>
-#include <asm/arch/gpio_defs.h>
+#include <asm/arch/gpio.h>
 #include <netdev.h>
 #include <asm/arch/davinci_misc.h>
 #ifdef CONFIG_DAVINCI_MMC
diff --git a/drivers/usb/musb/da8xx.h b/drivers/usb/musb/da8xx.h
index b9660ba..be1cdaf 100644
--- a/drivers/usb/musb/da8xx.h
+++ b/drivers/usb/musb/da8xx.h
@@ -25,7 +25,7 @@
 #define __DA8XX_MUSB_H__
 
 #include <asm/arch/hardware.h>
-#include <asm/arch/gpio_defs.h>
+#include <asm/arch/gpio.h>
 #include "musb_core.h"
 
 /* Base address of da8xx usb0 wrapper */
-- 
1.7.2.5

[U-Boot] [PATCH 1/2] DaVinci: rename gpio_defs.h to gpio.h

[Albert ARIBAUD]

Hi Laurence,

Le 15/07/2011 13:27, Laurence Withers a ?crit :
> In preparation for a generic GPIO driver for the DA8xx processors,
> rename<asm/arch/gpio_defs.h>  to<asm/arch/gpio.h>  and fix up all files
> which include it.
>
> Signed-off-by: Laurence Withers<lwithers@guralp.com>
> ---
>   arch/arm/include/asm/arch-davinci/gpio.h      |   66 +++++++++++++++++++++++++
>   arch/arm/include/asm/arch-davinci/gpio_defs.h |   66 -------------------------

This is a rename, so use 'git mv...' and 'git format-patch -C' to let 
git and readers know it is.

Amicalement,
-- 
Albert.

[U-Boot] [PATCH 1/2] DaVinci: rename gpio_defs.h to gpio.h

[Laurence Withers]

On Sat, Jul 16, 2011 at 11:11:15AM +0200, Albert ARIBAUD wrote:
> This is a rename, so use 'git mv...' and 'git format-patch -C' to let
> git and readers know it is.

Hi Albert,

Thanks for the tip. I reposted a v2 with this.

Bye for now,
-- 
Laurence Withers, <lwithers@guralp.com>                http://www.guralp.com/
Direct tel:+447753988197 or tel:+443333408643               Software Engineer
General support queries: <support@guralp.com>         CMG-DCM CMG-EAM CMG-NAM

[U-Boot] [PATCH 1/2] DaVinci: rename gpio_defs.h to gpio.h

[Paulraj, Sandeep]

> Hi Laurence,
> 
> Le 15/07/2011 13:27, Laurence Withers a ?crit :
> > In preparation for a generic GPIO driver for the DA8xx processors,
> > rename<asm/arch/gpio_defs.h>  to<asm/arch/gpio.h>  and fix up all files
> > which include it.
> >
> > Signed-off-by: Laurence Withers<lwithers@guralp.com>
> > ---
> >   arch/arm/include/asm/arch-davinci/gpio.h      |   66
> +++++++++++++++++++++++++
> >   arch/arm/include/asm/arch-davinci/gpio_defs.h |   66 -----------------
> --------
> 
> This is a rename, so use 'git mv...' and 'git format-patch -C' to let
> git and readers know it is.
> 


I didn't see an updated patch for this?
Are you planning on sending one?

--Sandeep

[U-Boot] [PATCH 1/2] DaVinci: rename gpio_defs.h to gpio.h

[Albert ARIBAUD]

Hi Sandeep,

Le 18/07/2011 15:02, Paulraj, Sandeep a ?crit :
>
>> Hi Laurence,
>>
>> Le 15/07/2011 13:27, Laurence Withers a ?crit :
>>> In preparation for a generic GPIO driver for the DA8xx processors,
>>> rename<asm/arch/gpio_defs.h>   to<asm/arch/gpio.h>   and fix up all files
>>> which include it.
>>>
>>> Signed-off-by: Laurence Withers<lwithers@guralp.com>
>>> ---
>>>    arch/arm/include/asm/arch-davinci/gpio.h      |   66
>> +++++++++++++++++++++++++
>>>    arch/arm/include/asm/arch-davinci/gpio_defs.h |   66 -----------------
>> --------
>>
>> This is a rename, so use 'git mv...' and 'git format-patch -C' to let
>> git and readers know it is.
>>
>
>
> I didn't see an updated patch for this?
> Are you planning on sending one?

It was sent: <http://patchwork.ozlabs.org/patch/104953/>

> --Sandeep

Amicalement,
-- 
Albert.

[U-Boot] [PATCH 1/2] DaVinci: rename gpio_defs.h to gpio.h

[Mike Frysinger]

On Sat, Jul 16, 2011 at 05:11, Albert ARIBAUD wrote:
> Le 15/07/2011 13:27, Laurence Withers a ?crit :
>> In preparation for a generic GPIO driver for the DA8xx processors,
>> rename<asm/arch/gpio_defs.h> ?to<asm/arch/gpio.h> ?and fix up all files
>> which include it.
>>
>> Signed-off-by: Laurence Withers<lwithers@guralp.com>
>> ---
>> ? arch/arm/include/asm/arch-davinci/gpio.h ? ? ?| ? 66 +++++++++++++++++++++++++
>> ? arch/arm/include/asm/arch-davinci/gpio_defs.h | ? 66 -------------------------
>
> This is a rename, so use 'git mv...' and 'git format-patch -C' to let
> git and readers know it is.

the `git mv` is unnecessary.  the -C/-M options to
format-patch/send-email should be sufficient.
-mike

[U-Boot] [PATCH 2/2] DA8xx: add generic GPIO driver

[Laurence Withers]

Add a generic GPIO driver for the DaVinci DA8xx processors. It is turned
on by defining CONFIG_DA8XX_GPIO and fulfills the generic GPIO interface
specified in <asm/gpio.h> . The driver has support for both manipulating
GPIO pins as well as automatically configuring the pin multiplexor
registers to set the pin function to GPIO.

Signed-off-by: Laurence Withers <lwithers@guralp.com>
---
 arch/arm/include/asm/arch-davinci/gpio.h |    8 +
 drivers/gpio/Makefile                    |    1 +
 drivers/gpio/da8xx_gpio.c                |  281 ++++++++++++++++++++++++++++++
 3 files changed, 290 insertions(+), 0 deletions(-)
 create mode 100644 drivers/gpio/da8xx_gpio.c

diff --git a/arch/arm/include/asm/arch-davinci/gpio.h b/arch/arm/include/asm/arch-davinci/gpio.h
index 1be2ac2..29dcccf 100644
--- a/arch/arm/include/asm/arch-davinci/gpio.h
+++ b/arch/arm/include/asm/arch-davinci/gpio.h
@@ -63,4 +63,12 @@ struct davinci_gpio_bank {
 #define davinci_gpio_bank45 ((struct davinci_gpio *)DAVINCI_GPIO_BANK45)
 #define davinci_gpio_bank67 ((struct davinci_gpio *)DAVINCI_GPIO_BANK67)
 
+#define gpio_status()		gpio_info()
+#define GPIO_NAME_SIZE		20
+#define MAX_NUM_GPIOS		144
+#define GPIO_BANK(gp)		(davinci_gpio_bank01 + ((gp) >> 5))
+#define GPIO_BIT(gp)		((gp) & 0x1F)
+
+void gpio_info(void);
+
 #endif
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 1e3ae11..62ec97d 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -32,6 +32,7 @@ COBJS-$(CONFIG_MXC_GPIO)	+= mxc_gpio.o
 COBJS-$(CONFIG_PCA953X)		+= pca953x.o
 COBJS-$(CONFIG_S5P)		+= s5p_gpio.o
 COBJS-$(CONFIG_TEGRA2_GPIO)	+= tegra2_gpio.o
+COBJS-$(CONFIG_DA8XX_GPIO)	+= da8xx_gpio.o
 
 COBJS	:= $(COBJS-y)
 SRCS 	:= $(COBJS:.o=.c)
diff --git a/drivers/gpio/da8xx_gpio.c b/drivers/gpio/da8xx_gpio.c
new file mode 100644
index 0000000..0308223
--- /dev/null
+++ b/drivers/gpio/da8xx_gpio.c
@@ -0,0 +1,281 @@
+/*
+ * GPIO driver for TI DaVinci DA8xx SOCs.
+ *
+ * (C) Copyright 2011 Guralp Systems Ltd.
+ * Laurence Withers <lwithers@guralp.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/gpio.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/hardware.h>
+#include <asm/arch/davinci_misc.h>
+
+
+static struct gpio_registry {
+	int is_registered;
+	char name[GPIO_NAME_SIZE];
+} gpio_registry[MAX_NUM_GPIOS];
+
+
+#define pinmux(x)       (&davinci_syscfg_regs->pinmux[x])
+
+static const struct pinmux_config gpio_pinmux[] = {
+	{ pinmux(1), 8, 7 },	/* GP0[0] */
+	{ pinmux(1), 8, 6 },
+	{ pinmux(1), 8, 5 },
+	{ pinmux(1), 8, 4 },
+	{ pinmux(1), 8, 3 },
+	{ pinmux(1), 8, 2 },
+	{ pinmux(1), 8, 1 },
+	{ pinmux(1), 8, 0 },
+	{ pinmux(0), 8, 7 },
+	{ pinmux(0), 8, 6 },
+	{ pinmux(0), 8, 5 },
+	{ pinmux(0), 8, 4 },
+	{ pinmux(0), 8, 3 },
+	{ pinmux(0), 8, 2 },
+	{ pinmux(0), 8, 1 },
+	{ pinmux(0), 8, 0 },
+	{ pinmux(4), 8, 7 },	/* GP1[0] */
+	{ pinmux(4), 8, 6 },
+	{ pinmux(4), 8, 5 },
+	{ pinmux(4), 8, 4 },
+	{ pinmux(4), 8, 3 },
+	{ pinmux(4), 8, 2 },
+	{ pinmux(4), 4, 1 },
+	{ pinmux(4), 4, 0 },
+	{ pinmux(3), 4, 0 },
+	{ pinmux(2), 4, 6 },
+	{ pinmux(2), 4, 5 },
+	{ pinmux(2), 4, 4 },
+	{ pinmux(2), 4, 3 },
+	{ pinmux(2), 4, 2 },
+	{ pinmux(2), 4, 1 },
+	{ pinmux(2), 8, 0 },
+	{ pinmux(6), 8, 7 },	/* GP2[0] */
+	{ pinmux(6), 8, 6 },
+	{ pinmux(6), 8, 5 },
+	{ pinmux(6), 8, 4 },
+	{ pinmux(6), 8, 3 },
+	{ pinmux(6), 8, 2 },
+	{ pinmux(6), 8, 1 },
+	{ pinmux(6), 8, 0 },
+	{ pinmux(5), 8, 7 },
+	{ pinmux(5), 8, 6 },
+	{ pinmux(5), 8, 5 },
+	{ pinmux(5), 8, 4 },
+	{ pinmux(5), 8, 3 },
+	{ pinmux(5), 8, 2 },
+	{ pinmux(5), 8, 1 },
+	{ pinmux(5), 8, 0 },
+	{ pinmux(8), 8, 7 },	/* GP3[0] */
+	{ pinmux(8), 8, 6 },
+	{ pinmux(8), 8, 5 },
+	{ pinmux(8), 8, 4 },
+	{ pinmux(8), 8, 3 },
+	{ pinmux(8), 8, 2 },
+	{ pinmux(8), 8, 1 },
+	{ pinmux(8), 8, 0 },
+	{ pinmux(7), 8, 7 },
+	{ pinmux(7), 8, 6 },
+	{ pinmux(7), 8, 5 },
+	{ pinmux(7), 8, 4 },
+	{ pinmux(7), 8, 3 },
+	{ pinmux(7), 8, 2 },
+	{ pinmux(7), 8, 1 },
+	{ pinmux(7), 8, 0 },
+	{ pinmux(10), 8, 7 },	/* GP4[0] */
+	{ pinmux(10), 8, 6 },
+	{ pinmux(10), 8, 5 },
+	{ pinmux(10), 8, 4 },
+	{ pinmux(10), 8, 3 },
+	{ pinmux(10), 8, 2 },
+	{ pinmux(10), 8, 1 },
+	{ pinmux(10), 8, 0 },
+	{ pinmux(9), 8, 7 },
+	{ pinmux(9), 8, 6 },
+	{ pinmux(9), 8, 5 },
+	{ pinmux(9), 8, 4 },
+	{ pinmux(9), 8, 3 },
+	{ pinmux(9), 8, 2 },
+	{ pinmux(9), 8, 1 },
+	{ pinmux(9), 8, 0 },
+	{ pinmux(12), 8, 7 },	/* GP5[0] */
+	{ pinmux(12), 8, 6 },
+	{ pinmux(12), 8, 5 },
+	{ pinmux(12), 8, 4 },
+	{ pinmux(12), 8, 3 },
+	{ pinmux(12), 8, 2 },
+	{ pinmux(12), 8, 1 },
+	{ pinmux(12), 8, 0 },
+	{ pinmux(11), 8, 7 },
+	{ pinmux(11), 8, 6 },
+	{ pinmux(11), 8, 5 },
+	{ pinmux(11), 8, 4 },
+	{ pinmux(11), 8, 3 },
+	{ pinmux(11), 8, 2 },
+	{ pinmux(11), 8, 1 },
+	{ pinmux(11), 8, 0 },
+	{ pinmux(19), 8, 6 },	/* GP6[0] */
+	{ pinmux(19), 8, 5 },
+	{ pinmux(19), 8, 4 },
+	{ pinmux(19), 8, 3 },
+	{ pinmux(19), 8, 2 },
+	{ pinmux(16), 8, 1 },
+	{ pinmux(14), 8, 1 },
+	{ pinmux(14), 8, 0 },
+	{ pinmux(13), 8, 7 },
+	{ pinmux(13), 8, 6 },
+	{ pinmux(13), 8, 5 },
+	{ pinmux(13), 8, 4 },
+	{ pinmux(13), 8, 3 },
+	{ pinmux(13), 8, 2 },
+	{ pinmux(13), 8, 1 },
+	{ pinmux(13), 8, 0 },
+	{ pinmux(18), 8, 1 },	/* GP7[0] */
+	{ pinmux(18), 8, 0 },
+	{ pinmux(17), 8, 7 },
+	{ pinmux(17), 8, 6 },
+	{ pinmux(17), 8, 5 },
+	{ pinmux(17), 8, 4 },
+	{ pinmux(17), 8, 3 },
+	{ pinmux(17), 8, 2 },
+	{ pinmux(17), 8, 1 },
+	{ pinmux(17), 8, 0 },
+	{ pinmux(16), 8, 7 },
+	{ pinmux(16), 8, 6 },
+	{ pinmux(16), 8, 5 },
+	{ pinmux(16), 8, 4 },
+	{ pinmux(16), 8, 3 },
+	{ pinmux(16), 8, 2 },
+	{ pinmux(19), 8, 0 },	/* GP8[0] */
+	{ pinmux(3), 4, 7 },
+	{ pinmux(3), 4, 6 },
+	{ pinmux(3), 4, 5 },
+	{ pinmux(3), 4, 4 },
+	{ pinmux(3), 4, 3 },
+	{ pinmux(3), 4, 2 },
+	{ pinmux(2), 4, 7 },
+	{ pinmux(19), 8, 1 },
+	{ pinmux(19), 8, 0 },
+	{ pinmux(18), 8, 7 },
+	{ pinmux(18), 8, 6 },
+	{ pinmux(18), 8, 5 },
+	{ pinmux(18), 8, 4 },
+	{ pinmux(18), 8, 3 },
+	{ pinmux(18), 8, 2 },
+};
+
+
+
+int gpio_request(int gp, const char *label)
+{
+	if (gp >= MAX_NUM_GPIOS)
+		return -1;
+
+	if (gpio_registry[gp].is_registered)
+		return -1;
+
+	gpio_registry[gp].is_registered = 1;
+	strncpy(gpio_registry[gp].name, label, GPIO_NAME_SIZE);
+	gpio_registry[gp].name[GPIO_NAME_SIZE - 1] = 0;
+
+	davinci_configure_pin_mux(&gpio_pinmux[gp], 1);
+
+	return 0;
+}
+
+
+void gpio_free(int gp)
+{
+	gpio_registry[gp].is_registered = 0;
+}
+
+
+void gpio_toggle_value(int gp)
+{
+	struct davinci_gpio *bank;
+
+	bank = GPIO_BANK(gp);
+	gpio_set_value(gp, !gpio_get_value(gp));
+}
+
+
+int gpio_direction_input(int gp)
+{
+	struct davinci_gpio *bank;
+
+	bank = GPIO_BANK(gp);
+	setbits_le32(&bank->dir, 1U << GPIO_BIT(gp));
+	return 0;
+}
+
+
+int gpio_direction_output(int gp, int value)
+{
+	struct davinci_gpio *bank;
+
+	bank = GPIO_BANK(gp);
+	clrbits_le32(&bank->dir, 1U << GPIO_BIT(gp));
+	gpio_set_value(gp, value);
+	return 0;
+}
+
+
+int gpio_get_value(int gp)
+{
+	struct davinci_gpio *bank;
+	unsigned int ip;
+
+	bank = GPIO_BANK(gp);
+	ip = in_le32(&bank->in_data) & (1U << GPIO_BIT(gp));
+	return ip ? 1 : 0;
+}
+
+
+void gpio_set_value(int gp, int value)
+{
+	struct davinci_gpio *bank;
+
+	bank = GPIO_BANK(gp);
+
+	if (value)
+		bank->set_data = 1U << GPIO_BIT(gp);
+	else
+		bank->clr_data = 1U << GPIO_BIT(gp);
+}
+
+
+void gpio_info(void)
+{
+	int gp, dir, val;
+	struct davinci_gpio *bank;
+
+	for (gp = 0; gp < MAX_NUM_GPIOS; ++gp) {
+		bank = GPIO_BANK(gp);
+		dir = in_le32(&bank->dir) & (1U << GPIO_BIT(gp));
+		val = gpio_get_value(gp);
+
+		printf("% 4d: %s: %d [%c] %s\n",
+			gp, dir ? " in" : "out", val,
+			gpio_registry[gp].is_registered ? 'x' : ' ',
+			gpio_registry[gp].name);
+	}
+}
-- 
1.7.2.5