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SubjectRe: GPIO support for HTC Dream
On Tue 2009-12-08 22:45:50, Russell King - ARM Linux wrote:
> On Tue, Dec 08, 2009 at 11:28:43AM +0100, Pavel Machek wrote:
> > Add GPIO support for HTC Dream.
> >
> > Signed-off-by: Pavel Machek <pavel@ucw.cz>
> >
> > diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig
> > index f780086..774c50e 100644
> > --- a/arch/arm/mach-msm/Kconfig
> > +++ b/arch/arm/mach-msm/Kconfig
> > @@ -40,4 +40,8 @@ config MACH_TROUT
> > help
> > Support for the HTC Dream, T-Mobile G1, Android ADP1 devices.
> >
> > +config GENERIC_GPIO
> > + bool
> > + default y
>
> Please arrange for this to be handled just like every other ARM
> platform via a 'select' statement - eg:
>
> config ARCH_AT91
> bool "Atmel AT91"
> select GENERIC_GPIO
> select ARCH_REQUIRE_GPIOLIB
> select HAVE_CLK
>
> It is not nice to have multiple definitions of the same symbol scattered
> throughout the Kconfig files.

Ok, fixed.

> > +#include <linux/kernel.h>
> > +#include <linux/errno.h>
> > +#include <linux/irq.h>
> > +#include <linux/pm.h>
> > +#include <linux/sysdev.h>
> > +#include <linux/io.h>
> > +
> > +#include <asm/gpio.h>
>
> linux/gpio.h is preferred over asm/gpio.h

Ok.

> > +++ b/arch/arm/mach-msm/board-dream.c
> > @@ -18,11 +18,13 @@
> > #include <asm/setup.h>
> > +#include <asm/gpio.h>
>
> ditto.

Ok.

> > +++ b/arch/arm/mach-msm/generic_gpio.c
> > @@ -0,0 +1,274 @@
> > +#include <linux/kernel.h>
> > +#include <linux/module.h>
> > +#include <linux/errno.h>
> > +#include <linux/slab.h>
> > +#include <linux/spinlock.h>
> > +#include <asm/gpio.h>
>
> ditto.

Ok. Incremental patch looks like:

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 1c4119c..db622a5 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -565,6 +565,7 @@ config ARCH_MSM
select CPU_V6
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
+ select GENERIC_GPIO
help
Support for Qualcomm MSM7K based systems. This runs on the ARM11
apps processor of the MSM7K and depends on a shared memory
diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig
index 774c50e..f780086 100644
--- a/arch/arm/mach-msm/Kconfig
+++ b/arch/arm/mach-msm/Kconfig
@@ -40,8 +40,4 @@ config MACH_TROUT
help
Support for the HTC Dream, T-Mobile G1, Android ADP1 devices.

-config GENERIC_GPIO
- bool
- default y
-
endif
diff --git a/arch/arm/mach-msm/board-dream-gpio.c b/arch/arm/mach-msm/board-dream-gpio.c
index 7796254..d9201f9 100644
--- a/arch/arm/mach-msm/board-dream-gpio.c
+++ b/arch/arm/mach-msm/board-dream-gpio.c
@@ -19,15 +19,16 @@
#include <linux/pm.h>
#include <linux/sysdev.h>
#include <linux/io.h>
+#include <linux/gpio.h>

-#include <asm/gpio.h>
#include <asm/mach-types.h>

#include "board-dream.h"
#include "gpio_chip.h"

+/* We want to be compatible with existing bootloaders */
#undef MODULE_PARAM_PREFIX
-#define MODULE_PARAM_PREFIX "board_dream."
+#define MODULE_PARAM_PREFIX "board_trout."

static uint cpld_usb_h2w_sw;
module_param_named(usb_h2w_sw, cpld_usb_h2w_sw, uint, 0);
diff --git a/arch/arm/mach-msm/board-dream.c b/arch/arm/mach-msm/board-dream.c
index 3e8e54a..edefacf 100644
--- a/arch/arm/mach-msm/board-dream.c
+++ b/arch/arm/mach-msm/board-dream.c
@@ -19,12 +19,12 @@
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
+#include <linux/gpio.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/setup.h>
-#include <asm/gpio.h>

#include <mach/board.h>
#include <mach/hardware.h>
diff --git a/arch/arm/mach-msm/generic_gpio.c b/arch/arm/mach-msm/generic_gpio.c
index 8ee7bd5..5164c77 100644
--- a/arch/arm/mach-msm/generic_gpio.c
+++ b/arch/arm/mach-msm/generic_gpio.c
@@ -18,7 +18,8 @@
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
-#include <asm/gpio.h>
+#include <linux/gpio.h>
+
#include "gpio_chip.h"

#define GPIO_NUM_TO_CHIP_INDEX(gpio) ((gpio)>>5)



--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


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