[PATCH 0/3] ARM: tegra: paz00: Add Wifi and second serial port support

[PATCH 0/3] ARM: tegra: paz00: Add Wifi and second serial port support

[Marc Dietrich]

Colin,

the following three patches add the second serial port (some solder points
on the mainboard) and Wifi support (rfkill and LED) to PAZ00.
The second serial port is useful to be able to communicate with the booloader
and also to see early kernel messages.

They were intended for 3.1 but if it's too late, 3.2 is also ok.

Thanks

Marc

Marc Dietrich (3):
  ARM: tegra: paz00: add support serial port on JP1
  ARM: tegra: paz00: export the WIFI rfkill gpio
  ARM: tegra: paz00: enable wifi led

 arch/arm/mach-tegra/board-paz00-pinmux.c |    2 +
 arch/arm/mach-tegra/board-paz00.c        |   50 ++++++++++++++++++++++++++++++
 arch/arm/mach-tegra/board-paz00.h        |    7 ++++
 3 files changed, 59 insertions(+), 0 deletions(-)

-- 
1.7.4.1

[PATCH 1/3] ARM: tegra: paz00: add support serial port on JP1

[Marc Dietrich]

UART-A is connected to JP1 and used by the bootloader for debugging
output while UART-D is connected to the mini-pcie expansion slot.

Signed-off-by: Marc Dietrich <marvin24-Mmb7MZpHnFY@public.gmane.org>
---
 arch/arm/mach-tegra/board-paz00.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-tegra/board-paz00.c b/arch/arm/mach-tegra/board-paz00.c
index 1b076f6..931b06e 100644
--- a/arch/arm/mach-tegra/board-paz00.c
+++ b/arch/arm/mach-tegra/board-paz00.c
@@ -47,7 +47,17 @@
 #include "gpio-names.h"
 
 static struct plat_serial8250_port debug_uart_platform_data[] = {
+/* serial port on JP1 */
 	{
+		.membase	= IO_ADDRESS(TEGRA_UARTA_BASE),
+		.mapbase	= TEGRA_UARTA_BASE,
+		.irq		= INT_UARTA,
+		.flags		= UPF_BOOT_AUTOCONF,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+		.uartclk	= 216000000,
+	}, {
+/* serial port on mini-pcie */
 		.membase	= IO_ADDRESS(TEGRA_UARTD_BASE),
 		.mapbase	= TEGRA_UARTD_BASE,
 		.irq		= INT_UARTD,
@@ -137,6 +147,7 @@ static void __init tegra_paz00_fixup(struct machine_desc *desc,
 
 static __initdata struct tegra_clk_init_table paz00_clk_init_table[] = {
 	/* name		parent		rate		enabled */
+	{ "uarta",	"pll_p",	216000000,	true },
 	{ "uartd",	"pll_p",	216000000,	true },
 	{ NULL,		NULL,		0,		0},
 };
-- 
1.7.4.1

[PATCH 2/3] ARM: tegra: paz00: export the WIFI rfkill gpio

[Marc Dietrich]

This makes the WIFI rfkill gpio available to userspace. On boot,
WIFI will be unblocked by default.

Signed-off-by: Marc Dietrich <marvin24-Mmb7MZpHnFY@public.gmane.org>
---
 arch/arm/mach-tegra/board-paz00-pinmux.c |    1 +
 arch/arm/mach-tegra/board-paz00.c        |   16 ++++++++++++++++
 arch/arm/mach-tegra/board-paz00.h        |    6 ++++++
 3 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-tegra/board-paz00-pinmux.c b/arch/arm/mach-tegra/board-paz00-pinmux.c
index bdd2627..c02a48f 100644
--- a/arch/arm/mach-tegra/board-paz00-pinmux.c
+++ b/arch/arm/mach-tegra/board-paz00-pinmux.c
@@ -145,6 +145,7 @@ static struct tegra_gpio_table gpio_table[] = {
 	{ .gpio = TEGRA_GPIO_SD1_WP,	.enable = true },
 	{ .gpio = TEGRA_GPIO_SD1_POWER,	.enable = true },
 	{ .gpio = TEGRA_ULPI_RST,	.enable = true },
+	{ .gpio = TEGRA_WIFI_PWRN,	.enable = true },
 };
 
 void paz00_pinmux_init(void)
diff --git a/arch/arm/mach-tegra/board-paz00.c b/arch/arm/mach-tegra/board-paz00.c
index 931b06e..0bc652b 100644
--- a/arch/arm/mach-tegra/board-paz00.c
+++ b/arch/arm/mach-tegra/board-paz00.c
@@ -25,6 +25,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/pda_power.h>
 #include <linux/io.h>
+#include <linux/gpio.h>
 #include <linux/i2c.h>
 #include <linux/i2c-tegra.h>
 #include <linux/platform_data/tegra_usb.h>
@@ -165,6 +166,20 @@ static struct tegra_sdhci_platform_data sdhci_pdata4 = {
 	.is_8bit	= 1,
 };
 
+static void __init paz00_wifi_init(void)
+{
+	int ret;
+
+	/* unlock hw rfkill */
+	ret = gpio_request_one(TEGRA_WIFI_PWRN, GPIOF_OUT_INIT_HIGH,
+		"wifi pwrn");
+	if (ret) {
+		pr_warning("WIFI: could not requestrfkill gpio\n");
+		return;
+	}
+	gpio_export(TEGRA_WIFI_PWRN, 0);
+};
+
 static void __init tegra_paz00_init(void)
 {
 	tegra_clk_init_from_table(paz00_clk_init_table);
@@ -178,6 +193,7 @@ static void __init tegra_paz00_init(void)
 
 	paz00_i2c_init();
 	paz00_usb_init();
+	paz00_wifi_init();
 }
 
 MACHINE_START(PAZ00, "Toshiba AC100 / Dynabook AZ")
diff --git a/arch/arm/mach-tegra/board-paz00.h b/arch/arm/mach-tegra/board-paz00.h
index d4ff39d..5d2849e 100644
--- a/arch/arm/mach-tegra/board-paz00.h
+++ b/arch/arm/mach-tegra/board-paz00.h
@@ -17,11 +17,17 @@
 #ifndef _MACH_TEGRA_BOARD_PAZ00_H
 #define _MACH_TEGRA_BOARD_PAZ00_H
 
+/* SDCARD */
 #define TEGRA_GPIO_SD1_CD		TEGRA_GPIO_PV5
 #define TEGRA_GPIO_SD1_WP		TEGRA_GPIO_PH1
 #define TEGRA_GPIO_SD1_POWER		TEGRA_GPIO_PT3
+
+/* ULPI */
 #define TEGRA_ULPI_RST			TEGRA_GPIO_PV0
 
+/* WIFI */
+#define TEGRA_WIFI_PWRN			TEGRA_GPIO_PK5
+
 void paz00_pinmux_init(void);
 
 #endif
-- 
1.7.4.1

[PATCH 3/3] ARM: tegra: paz00: enable wifi led

[Marc Dietrich]

This adds support for the wifi led. It is automaticly triggered by
the rfkill0 event.

Signed-off-by: Marc Dietrich <marvin24-Mmb7MZpHnFY@public.gmane.org>
---
 arch/arm/mach-tegra/board-paz00-pinmux.c |    1 +
 arch/arm/mach-tegra/board-paz00.c        |   23 +++++++++++++++++++++++
 arch/arm/mach-tegra/board-paz00.h        |    1 +
 3 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-tegra/board-paz00-pinmux.c b/arch/arm/mach-tegra/board-paz00-pinmux.c
index c02a48f..41a6304 100644
--- a/arch/arm/mach-tegra/board-paz00-pinmux.c
+++ b/arch/arm/mach-tegra/board-paz00-pinmux.c
@@ -146,6 +146,7 @@ static struct tegra_gpio_table gpio_table[] = {
 	{ .gpio = TEGRA_GPIO_SD1_POWER,	.enable = true },
 	{ .gpio = TEGRA_ULPI_RST,	.enable = true },
 	{ .gpio = TEGRA_WIFI_PWRN,	.enable = true },
+	{ .gpio = TEGRA_WIFI_LED,	.enable = true },
 };
 
 void paz00_pinmux_init(void)
diff --git a/arch/arm/mach-tegra/board-paz00.c b/arch/arm/mach-tegra/board-paz00.c
index 0bc652b..9c7531a 100644
--- a/arch/arm/mach-tegra/board-paz00.c
+++ b/arch/arm/mach-tegra/board-paz00.c
@@ -26,6 +26,7 @@
 #include <linux/pda_power.h>
 #include <linux/io.h>
 #include <linux/gpio.h>
+#include <linux/leds.h>
 #include <linux/i2c.h>
 #include <linux/i2c-tegra.h>
 #include <linux/platform_data/tegra_usb.h>
@@ -79,8 +80,30 @@ static struct platform_device debug_uart = {
 	},
 };
 
+static struct gpio_led gpio_leds[] = {
+	{
+		.name                   = "wifi-led",
+		.default_trigger        = "rfkill0",
+		.gpio                   = TEGRA_WIFI_LED,
+	},
+};
+
+static struct gpio_led_platform_data gpio_led_info = {
+	.leds           = gpio_leds,
+	.num_leds       = ARRAY_SIZE(gpio_leds),
+};
+
+static struct platform_device leds_gpio = {
+	.name   = "leds-gpio",
+	.id     = -1,
+	.dev    = {
+		.platform_data  = &gpio_led_info,
+	},
+};
+
 static struct platform_device *paz00_devices[] __initdata = {
 	&debug_uart,
+	&leds_gpio,
 	&tegra_sdhci_device1,
 	&tegra_sdhci_device4,
 };
diff --git a/arch/arm/mach-tegra/board-paz00.h b/arch/arm/mach-tegra/board-paz00.h
index 5d2849e..5d06053 100644
--- a/arch/arm/mach-tegra/board-paz00.h
+++ b/arch/arm/mach-tegra/board-paz00.h
@@ -27,6 +27,7 @@
 
 /* WIFI */
 #define TEGRA_WIFI_PWRN			TEGRA_GPIO_PK5
+#define TEGRA_WIFI_LED			TEGRA_GPIO_PD0
 
 void paz00_pinmux_init(void);
 
-- 
1.7.4.1

Re: [PATCH 2/3] ARM: tegra: paz00: export the WIFI rfkill gpio

[Vasily Khoruzhick]

On Friday 15 July 2011 13:24:22 Marc Dietrich wrote:
> This makes the WIFI rfkill gpio available to userspace. On boot,
> WIFI will be unblocked by default.

Take a look on rfkill-gpio driver.

Regards
Vasily

> Signed-off-by: Marc Dietrich <marvin24-Mmb7MZpHnFY@public.gmane.org>
> ---
>  arch/arm/mach-tegra/board-paz00-pinmux.c |    1 +
>  arch/arm/mach-tegra/board-paz00.c        |   16 ++++++++++++++++
>  arch/arm/mach-tegra/board-paz00.h        |    6 ++++++
>  3 files changed, 23 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/mach-tegra/board-paz00-pinmux.c
> b/arch/arm/mach-tegra/board-paz00-pinmux.c index bdd2627..c02a48f 100644
> --- a/arch/arm/mach-tegra/board-paz00-pinmux.c
> +++ b/arch/arm/mach-tegra/board-paz00-pinmux.c
> @@ -145,6 +145,7 @@ static struct tegra_gpio_table gpio_table[] = {
>  	{ .gpio = TEGRA_GPIO_SD1_WP,	.enable = true },
>  	{ .gpio = TEGRA_GPIO_SD1_POWER,	.enable = true },
>  	{ .gpio = TEGRA_ULPI_RST,	.enable = true },
> +	{ .gpio = TEGRA_WIFI_PWRN,	.enable = true },
>  };
> 
>  void paz00_pinmux_init(void)
> diff --git a/arch/arm/mach-tegra/board-paz00.c
> b/arch/arm/mach-tegra/board-paz00.c index 931b06e..0bc652b 100644
> --- a/arch/arm/mach-tegra/board-paz00.c
> +++ b/arch/arm/mach-tegra/board-paz00.c
> @@ -25,6 +25,7 @@
>  #include <linux/dma-mapping.h>
>  #include <linux/pda_power.h>
>  #include <linux/io.h>
> +#include <linux/gpio.h>
>  #include <linux/i2c.h>
>  #include <linux/i2c-tegra.h>
>  #include <linux/platform_data/tegra_usb.h>
> @@ -165,6 +166,20 @@ static struct tegra_sdhci_platform_data sdhci_pdata4 =
> { .is_8bit	= 1,
>  };
> 
> +static void __init paz00_wifi_init(void)
> +{
> +	int ret;
> +
> +	/* unlock hw rfkill */
> +	ret = gpio_request_one(TEGRA_WIFI_PWRN, GPIOF_OUT_INIT_HIGH,
> +		"wifi pwrn");
> +	if (ret) {
> +		pr_warning("WIFI: could not requestrfkill gpio\n");
> +		return;
> +	}
> +	gpio_export(TEGRA_WIFI_PWRN, 0);
> +};
> +
>  static void __init tegra_paz00_init(void)
>  {
>  	tegra_clk_init_from_table(paz00_clk_init_table);
> @@ -178,6 +193,7 @@ static void __init tegra_paz00_init(void)
> 
>  	paz00_i2c_init();
>  	paz00_usb_init();
> +	paz00_wifi_init();
>  }
> 
>  MACHINE_START(PAZ00, "Toshiba AC100 / Dynabook AZ")
> diff --git a/arch/arm/mach-tegra/board-paz00.h
> b/arch/arm/mach-tegra/board-paz00.h index d4ff39d..5d2849e 100644
> --- a/arch/arm/mach-tegra/board-paz00.h
> +++ b/arch/arm/mach-tegra/board-paz00.h
> @@ -17,11 +17,17 @@
>  #ifndef _MACH_TEGRA_BOARD_PAZ00_H
>  #define _MACH_TEGRA_BOARD_PAZ00_H
> 
> +/* SDCARD */
>  #define TEGRA_GPIO_SD1_CD		TEGRA_GPIO_PV5
>  #define TEGRA_GPIO_SD1_WP		TEGRA_GPIO_PH1
>  #define TEGRA_GPIO_SD1_POWER		TEGRA_GPIO_PT3
> +
> +/* ULPI */
>  #define TEGRA_ULPI_RST			TEGRA_GPIO_PV0
> 
> +/* WIFI */
> +#define TEGRA_WIFI_PWRN			TEGRA_GPIO_PK5
> +
>  void paz00_pinmux_init(void);
> 
>  #endif

RE: [PATCH 1/3] ARM: tegra: paz00: add support serial port on JP1

[Stephen Warren]

Marc Dietrich wrote at Friday, July 15, 2011 4:24 AM:
> UART-A is connected to JP1 and used by the bootloader for debugging
> output while UART-D is connected to the mini-pcie expansion slot.
> 
> Signed-off-by: Marc Dietrich <marvin24-Mmb7MZpHnFY@public.gmane.org>
> ---
>  arch/arm/mach-tegra/board-paz00.c |   11 +++++++++++
>  1 files changed, 11 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/mach-tegra/board-paz00.c b/arch/arm/mach-tegra/board-paz00.c
> index 1b076f6..931b06e 100644
> --- a/arch/arm/mach-tegra/board-paz00.c
> +++ b/arch/arm/mach-tegra/board-paz00.c
> @@ -47,7 +47,17 @@
>  #include "gpio-names.h"
> 
>  static struct plat_serial8250_port debug_uart_platform_data[] = {
> +/* serial port on JP1 */
>  	{

Shouldn't the indentation of the comment be aligned to the brace?

I'm not sure if the order of entries in the array matters. It'd presumably
be safer to add the new UART entry to the end of the array so that any
existing index-based number isn't changed.

> +		.membase	= IO_ADDRESS(TEGRA_UARTA_BASE),
> +		.mapbase	= TEGRA_UARTA_BASE,
> +		.irq		= INT_UARTA,
> +		.flags		= UPF_BOOT_AUTOCONF,
> +		.iotype		= UPIO_MEM,
> +		.regshift	= 2,
> +		.uartclk	= 216000000,
> +	}, {
> +/* serial port on mini-pcie */
>  		.membase	= IO_ADDRESS(TEGRA_UARTD_BASE),
>  		.mapbase	= TEGRA_UARTD_BASE,
>  		.irq		= INT_UARTD,
> @@ -137,6 +147,7 @@ static void __init tegra_paz00_fixup(struct machine_desc *desc,
> 
>  static __initdata struct tegra_clk_init_table paz00_clk_init_table[] = {
>  	/* name		parent		rate		enabled */
> +	{ "uarta",	"pll_p",	216000000,	true },
>  	{ "uartd",	"pll_p",	216000000,	true },
>  	{ NULL,		NULL,		0,		0},
>  };
> --
> 1.7.4.1

-- 
nvpublic

RE: [PATCH 2/3] ARM: tegra: paz00: export the WIFI rfkill gpio

[Stephen Warren]

Marc Dietrich wrote at Friday, July 15, 2011 4:24 AM:
> This makes the WIFI rfkill gpio available to userspace. On boot,
> WIFI will be unblocked by default.
...
> +static void __init paz00_wifi_init(void)
> +{
> +	int ret;
> +
> +	/* unlock hw rfkill */
> +	ret = gpio_request_one(TEGRA_WIFI_PWRN, GPIOF_OUT_INIT_HIGH,
> +		"wifi pwrn");
> +	if (ret) {
> +		pr_warning("WIFI: could not requestrfkill gpio\n");
> +		return;
> +	}
> +	gpio_export(TEGRA_WIFI_PWRN, 0);
> +};

Wouldn't you want to skip the gpio_export() call if the gpio_request()
call failed?

Of course, this is moot since Vasily mentioned the gpio-rfkill driver.
Luckily, that driver is already in Tegra's for-next, so it should be
pretty easy to adapt to.

-- 
nvpublic

RE: [PATCH 3/3] ARM: tegra: paz00: enable wifi led

[Stephen Warren]

Marc Dietrich wrote at Friday, July 15, 2011 4:24 AM:
> This adds support for the wifi led. It is automaticly triggered by
> the rfkill0 event.
...
> +static struct gpio_led gpio_leds[] = {
> +	{
> +		.name                   = "wifi-led",
> +		.default_trigger        = "rfkill0",
> +		.gpio                   = TEGRA_WIFI_LED,
> +	},
> +};

How does this work given that the previous patch simply exports the actual
GPIO to user-space, rather than registering it through an rfkill driver;
Does the WiFi driver itself register directly with the rfkill system? 

(what model of device is the AC100's WiFi? I assume it's on USB.)

-- 
nvpublic

Re: [PATCH 2/3] ARM: tegra: paz00: export the WIFI rfkill gpio

[Sergei Shtylyov]

Hello.

Stephen Warren wrote:

>> This makes the WIFI rfkill gpio available to userspace. On boot,
>> WIFI will be unblocked by default.
> ...
>> +static void __init paz00_wifi_init(void)
>> +{
>> +	int ret;
>> +
>> +	/* unlock hw rfkill */
>> +	ret = gpio_request_one(TEGRA_WIFI_PWRN, GPIOF_OUT_INIT_HIGH,
>> +		"wifi pwrn");
>> +	if (ret) {
>> +		pr_warning("WIFI: could not requestrfkill gpio\n");
>> +		return;
>> +	}
>> +	gpio_export(TEGRA_WIFI_PWRN, 0);
>> +};
> 
> Wouldn't you want to skip the gpio_export() call if the gpio_request()
> call failed?

    I think that's what he does -- there's a *return* statement.

WBR, Sergei

RE: [PATCH 2/3] ARM: tegra: paz00: export the WIFI rfkill gpio

[Stephen Warren]

Sergei Shtylyov wrote at Friday, July 15, 2011 11:25 AM:
> Stephen Warren wrote:
> 
> >> This makes the WIFI rfkill gpio available to userspace. On boot,
> >> WIFI will be unblocked by default.
> > ...
> >> +static void __init paz00_wifi_init(void)
> >> +{
> >> +	int ret;
> >> +
> >> +	/* unlock hw rfkill */
> >> +	ret = gpio_request_one(TEGRA_WIFI_PWRN, GPIOF_OUT_INIT_HIGH,
> >> +		"wifi pwrn");
> >> +	if (ret) {
> >> +		pr_warning("WIFI: could not requestrfkill gpio\n");
> >> +		return;
> >> +	}
> >> +	gpio_export(TEGRA_WIFI_PWRN, 0);
> >> +};
> >
> > Wouldn't you want to skip the gpio_export() call if the gpio_request()
> > call failed?
> 
>     I think that's what he does -- there's a *return* statement.

D'oh. There is indeed. For some reason I only noticed the warning call.
I guess I suck at reviews:-(

-- 
nvpublic

Re: [PATCH 1/3] ARM: tegra: paz00: add support serial port on JP1

[Marc Dietrich]

Am Fri, 15 Jul 2011 09:39:36 -0700
schrieb Stephen Warren <swarren-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>:

> Marc Dietrich wrote at Friday, July 15, 2011 4:24 AM:
> > UART-A is connected to JP1 and used by the bootloader for debugging
> > output while UART-D is connected to the mini-pcie expansion slot.
> > 
> > Signed-off-by: Marc Dietrich <marvin24-Mmb7MZpHnFY@public.gmane.org>
> > ---
> >  arch/arm/mach-tegra/board-paz00.c |   11 +++++++++++
> >  1 files changed, 11 insertions(+), 0 deletions(-)
> > 
> > diff --git a/arch/arm/mach-tegra/board-paz00.c
> > b/arch/arm/mach-tegra/board-paz00.c index 1b076f6..931b06e 100644
> > --- a/arch/arm/mach-tegra/board-paz00.c
> > +++ b/arch/arm/mach-tegra/board-paz00.c
> > @@ -47,7 +47,17 @@
> >  #include "gpio-names.h"
> > 
> >  static struct plat_serial8250_port debug_uart_platform_data[] = {
> > +/* serial port on JP1 */
> >  	{
> 
> Shouldn't the indentation of the comment be aligned to the brace?

ok, seems to be the common kernel style. Will be fixed in V2.

> I'm not sure if the order of entries in the array matters. It'd
> presumably be safer to add the new UART entry to the end of the array
> so that any existing index-based number isn't changed.

yeah, it will change the numbering, but none I know of used the serial
interface of the mini-pcie and it makes some sense to have the
bootloader output on number 0.

> > +		.membase	= IO_ADDRESS(TEGRA_UARTA_BASE),
> > +		.mapbase	= TEGRA_UARTA_BASE,
> > +		.irq		= INT_UARTA,
> > +		.flags		= UPF_BOOT_AUTOCONF,
> > +		.iotype		= UPIO_MEM,
> > +		.regshift	= 2,
> > +		.uartclk	= 216000000,
> > +	}, {
> > +/* serial port on mini-pcie */
> >  		.membase	= IO_ADDRESS(TEGRA_UARTD_BASE),
> >  		.mapbase	= TEGRA_UARTD_BASE,
> >  		.irq		= INT_UARTD,
> > @@ -137,6 +147,7 @@ static void __init tegra_paz00_fixup(struct
> > machine_desc *desc,
> > 
> >  static __initdata struct tegra_clk_init_table
> > paz00_clk_init_table[] = { /* name
> > parent		rate		enabled */
> > +	{ "uarta",	"pll_p",	216000000,	true },
> >  	{ "uartd",	"pll_p",	216000000,	true },
> >  	{ NULL,		NULL,
> > 0,		0}, };
> > --
> > 1.7.4.1
> 

Re: [PATCH 3/3] ARM: tegra: paz00: enable wifi led

[Marc Dietrich]

Am Fri, 15 Jul 2011 10:10:28 -0700
schrieb Stephen Warren <swarren-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>:

> Marc Dietrich wrote at Friday, July 15, 2011 4:24 AM:
> > This adds support for the wifi led. It is automaticly triggered by
> > the rfkill0 event.
> ...
> > +static struct gpio_led gpio_leds[] = {
> > +	{
> > +		.name                   = "wifi-led",
> > +		.default_trigger        = "rfkill0",
> > +		.gpio                   = TEGRA_WIFI_LED,
> > +	},
> > +};
> 
> How does this work given that the previous patch simply exports the
> actual GPIO to user-space, rather than registering it through an
> rfkill driver; Does the WiFi driver itself register directly with the
> rfkill system? 

I don't know the details but the driver seems to register some rfkill
poll routine which reports the hw status back to the mac layer. I guess
from there the rfkill events are distributed. At least the led works
fine here (and acts upon rfkill block). Problem is that the even binds
to the first device registered to if you plug in some other network
device which is registered first, then the led will act upon this one.
Don't know how to bind it to a specific device.

> (what model of device is the AC100's WiFi? I assume it's on USB.)

yes, it's a rt3070 (check the rt2x00 driver).

Marc

Re: [PATCH 2/3] ARM: tegra: paz00: export the WIFI rfkill gpio

[Marc Dietrich]

Hi Vasily,

On Friday 15 July 2011 14:17:02 Vasily Khoruzhick wrote:
> On Friday 15 July 2011 13:24:22 Marc Dietrich wrote:
> > This makes the WIFI rfkill gpio available to userspace. On boot,
> > WIFI will be unblocked by default.
> 
> Take a look on rfkill-gpio driver.

mmh, seems I don't understand that driver. I made a simple patch which roughly 
goes like this: 

diff --git a/arch/arm/mach-tegra/board-paz00.c b/arch/arm/mach-tegra/board-
paz00.c
index e85711f..06b3089 100644
--- a/arch/arm/mach-tegra/board-paz00.c
+++ b/arch/arm/mach-tegra/board-paz00.c
@@ -27,6 +27,7 @@
 #include <linux/io.h>
 #include <linux/i2c.h>
 #include <linux/i2c-tegra.h>
+#include <linux/rfkill-gpio.h>
 #include <linux/platform_data/tegra_usb.h>
 
 #include <asm/mach-types.h>

...

+static struct rfkill_gpio_platform_data rfkill_gpio_data = {
+       .name           = "rfkill-gpio",
+       .reset_gpio     = TEGRA_WIFI_RST,
+       .shutdown_gpio  = TEGRA_WIFI_PWRN,
+       .type           = RFKILL_TYPE_WLAN,
+};
+
+static struct platform_device rfkill_gpio = {
+       .name   = "rfkill_gpio",
+       .id     = -1,
+       .dev    = {
+               .platform_data  = &rfkill_gpio_data,
+       },
+};
+

@@ -327,6 +343,7 @@ static struct platform_device *paz00_devices[] __initdata = 
{
        &tegra_spi_device3,
        &tegra_spi_device4,
        &leds_gpio,
+       &rfkill_gpio,
        &tegra_gart_device,
        &tegra_i2s_device1,
        &tegra_das_device,

now I get two rfkill devices:

root@ac100:/sys/devices/platform/rfkill_gpio/rfkill/rfkill0# rfkill list; echo 0 
> state; sleep 5; rfkill list; echo 1 > state; sleep 5; rfkill list
0: rfkill-gpio: Wireless LAN
        Soft blocked: no
        Hard blocked: no
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no
0: rfkill-gpio: Wireless LAN
        Soft blocked: yes
        Hard blocked: no
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: yes
0: rfkill-gpio: Wireless LAN
        Soft blocked: no
        Hard blocked: no
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no

writing echo 1 > state is equal to rfkill block 0, while rfkill block 1 seems to 
be the softblock of phy0.

Is it possible that the gpios (rst and pwrn) are exchanged?
Why do I get two devices: rfkill-gpio from rfkill-gpio driver and phy0 from the 
wifi driver? I guess the latter shows the current state of the chip and the 
first? The state of the "switch"?

Thanks 

Marc


> Regards
> Vasily
> 
> > Signed-off-by: Marc Dietrich <marvin24-Mmb7MZpHnFY@public.gmane.org>
> > ---
> > 
> >  arch/arm/mach-tegra/board-paz00-pinmux.c |    1 +
> >  arch/arm/mach-tegra/board-paz00.c        |   16 ++++++++++++++++
> >  arch/arm/mach-tegra/board-paz00.h        |    6 ++++++
> >  3 files changed, 23 insertions(+), 0 deletions(-)
> > 
> > diff --git a/arch/arm/mach-tegra/board-paz00-pinmux.c
> > b/arch/arm/mach-tegra/board-paz00-pinmux.c index bdd2627..c02a48f 100644
> > --- a/arch/arm/mach-tegra/board-paz00-pinmux.c
> > +++ b/arch/arm/mach-tegra/board-paz00-pinmux.c
> > @@ -145,6 +145,7 @@ static struct tegra_gpio_table gpio_table[] = {
> > 
> >  	{ .gpio = TEGRA_GPIO_SD1_WP,	.enable = true },
> >  	{ .gpio = TEGRA_GPIO_SD1_POWER,	.enable = true },
> >  	{ .gpio = TEGRA_ULPI_RST,	.enable = true },
> > 
> > +	{ .gpio = TEGRA_WIFI_PWRN,	.enable = true },
> > 
> >  };
> >  
> >  void paz00_pinmux_init(void)
> > 
> > diff --git a/arch/arm/mach-tegra/board-paz00.c
> > b/arch/arm/mach-tegra/board-paz00.c index 931b06e..0bc652b 100644
> > --- a/arch/arm/mach-tegra/board-paz00.c
> > +++ b/arch/arm/mach-tegra/board-paz00.c
> > @@ -25,6 +25,7 @@
> > 
> >  #include <linux/dma-mapping.h>
> >  #include <linux/pda_power.h>
> >  #include <linux/io.h>
> > 
> > +#include <linux/gpio.h>
> > 
> >  #include <linux/i2c.h>
> >  #include <linux/i2c-tegra.h>
> >  #include <linux/platform_data/tegra_usb.h>
> > 
> > @@ -165,6 +166,20 @@ static struct tegra_sdhci_platform_data sdhci_pdata4
> > = { .is_8bit	= 1,
> > 
> >  };
> > 
> > +static void __init paz00_wifi_init(void)
> > +{
> > +	int ret;
> > +
> > +	/* unlock hw rfkill */
> > +	ret = gpio_request_one(TEGRA_WIFI_PWRN, GPIOF_OUT_INIT_HIGH,
> > +		"wifi pwrn");
> > +	if (ret) {
> > +		pr_warning("WIFI: could not requestrfkill gpio\n");
> > +		return;
> > +	}
> > +	gpio_export(TEGRA_WIFI_PWRN, 0);
> > +};
> > +
> > 
> >  static void __init tegra_paz00_init(void)
> >  {
> >  
> >  	tegra_clk_init_from_table(paz00_clk_init_table);
> > 
> > @@ -178,6 +193,7 @@ static void __init tegra_paz00_init(void)
> > 
> >  	paz00_i2c_init();
> >  	paz00_usb_init();
> > 
> > +	paz00_wifi_init();
> > 
> >  }
> >  
> >  MACHINE_START(PAZ00, "Toshiba AC100 / Dynabook AZ")
> > 
> > diff --git a/arch/arm/mach-tegra/board-paz00.h
> > b/arch/arm/mach-tegra/board-paz00.h index d4ff39d..5d2849e 100644
> > --- a/arch/arm/mach-tegra/board-paz00.h
> > +++ b/arch/arm/mach-tegra/board-paz00.h
> > @@ -17,11 +17,17 @@
> > 
> >  #ifndef _MACH_TEGRA_BOARD_PAZ00_H
> >  #define _MACH_TEGRA_BOARD_PAZ00_H
> > 
> > +/* SDCARD */
> > 
> >  #define TEGRA_GPIO_SD1_CD		TEGRA_GPIO_PV5
> >  #define TEGRA_GPIO_SD1_WP		TEGRA_GPIO_PH1
> >  #define TEGRA_GPIO_SD1_POWER		TEGRA_GPIO_PT3
> > 
> > +
> > +/* ULPI */
> > 
> >  #define TEGRA_ULPI_RST			TEGRA_GPIO_PV0
> > 
> > +/* WIFI */
> > +#define TEGRA_WIFI_PWRN			TEGRA_GPIO_PK5
> > +
> > 
> >  void paz00_pinmux_init(void);
> >  
> >  #endif