Using serial devices under linux

Shunji Takeshi | 1 Oct 2011 15:57

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Govindraj | 3 Oct 2011 07:00

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Re: [PATCH v6 02/16] OMAP2+: hwmod: Add API to check IO PAD wakeup status

Thanks for the review,

On Sat, Oct 1, 2011 at 8:03 PM, Rajendra Nayak <rnayak <at> ti.com> wrote:
> On Friday 30 September 2011 04:31 PM, Govindraj.R wrote:
>>
>> Add API to determine IO-PAD wakeup event status for a given
>> hwmod dynamic_mux pad.
>>
>> Wake up event set will be cleared on pad mux_read.
>
> Are these api's even getting used in this series?

Used in Tero's irq_chaining patches.

http://lkml.org/lkml/2011/9/23/121

--
Thanks,
Govindraj.R

>
>>
>> Signed-off-by: Govindraj.R<govindraj.raja <at> ti.com>
>> ---
>>  arch/arm/mach-omap2/mux.c                    |   30
>> ++++++++++++++++++++++++++
>>  arch/arm/mach-omap2/mux.h                    |   13 +++++++++++
>>  arch/arm/mach-omap2/omap_hwmod.c             |    7 ++++++
>>  arch/arm/plat-omap/include/plat/omap_hwmod.h |    1 +
>>  4 files changed, 51 insertions(+), 0 deletions(-)

(Continue reading)

Rajendra Nayak | 3 Oct 2011 07:23

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Re: [PATCH v6 02/16] OMAP2+: hwmod: Add API to check IO PAD wakeup status

On Monday 03 October 2011 10:30 AM, Govindraj wrote:
> Thanks for the review,
>
>
> On Sat, Oct 1, 2011 at 8:03 PM, Rajendra Nayak<rnayak <at> ti.com>  wrote:
>> On Friday 30 September 2011 04:31 PM, Govindraj.R wrote:
>>>
>>> Add API to determine IO-PAD wakeup event status for a given
>>> hwmod dynamic_mux pad.
>>>
>>> Wake up event set will be cleared on pad mux_read.
>>
>> Are these api's even getting used in this series?
>
> Used in Tero's irq_chaining patches.

So shouldn't this patch be part of his series instead?

>
> http://lkml.org/lkml/2011/9/23/121
>
> --
> Thanks,
> Govindraj.R
>
>
>>
>>>
>>> Signed-off-by: Govindraj.R<govindraj.raja <at> ti.com>
>>> ---

(Continue reading)

Nicolas Ferre | 3 Oct 2011 11:46

[PATCH 3/3] tty/serial: atmel_serial: __devinit_p for probe function

Signed-off-by: Nicolas Ferre <nicolas.ferre <at> atmel.com>
---
 drivers/tty/serial/atmel_serial.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index a652f8f..453cdb5 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
 <at>  <at>  -1789,7 +1789,7  <at>  <at>  static int __devexit atmel_serial_remove(struct platform_device *pdev)
 }

 static struct platform_driver atmel_serial_driver = {
-	.probe		= atmel_serial_probe,
+	.probe		= __devexit_p(atmel_serial_probe),
 	.remove		= __devexit_p(atmel_serial_remove),
 	.suspend	= atmel_serial_suspend,
 	.resume		= atmel_serial_resume,
--

-- 
1.7.3

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Nicolas Ferre | 3 Oct 2011 11:46

[PATCH 1/3] tty/serial: atmel_serial: change platform_data variable name

Easier to follow if platform_data name is pdata.

Signed-off-by: Nicolas Ferre <nicolas.ferre <at> atmel.com>
---
 drivers/tty/serial/atmel_serial.c |   14 +++++++-------
 1 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index af9b781..08b5273 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
 <at>  <at>  -1414,13 +1414,13  <at>  <at>  static void __devinit atmel_init_port(struct atmel_uart_port *atmel_port,
 				      struct platform_device *pdev)
 {
 	struct uart_port *port = &atmel_port->uart;
-	struct atmel_uart_data *data = pdev->dev.platform_data;
+	struct atmel_uart_data *pdata = pdev->dev.platform_data;

 	port->iotype		= UPIO_MEM;
 	port->flags		= UPF_BOOT_AUTOCONF;
 	port->ops		= &atmel_pops;
 	port->fifosize		= 1;
-	port->line		= data->num;
+	port->line		= pdata->num;
 	port->dev		= &pdev->dev;
 	port->mapbase	= pdev->resource[0].start;
 	port->irq	= pdev->resource[1].start;
 <at>  <at>  -1430,9 +1430,9  <at>  <at>  static void __devinit atmel_init_port(struct atmel_uart_port *atmel_port,

 	memset(&atmel_port->rx_ring, 0, sizeof(atmel_port->rx_ring));

(Continue reading)

Nicolas Ferre | 3 Oct 2011 10:56

Re: [PATCH 3/3] tty/serial: atmel_serial: __devinit_p for probe function

On 10/03/2011 10:50 AM, Russell King - ARM Linux :
> On Mon, Oct 03, 2011 at 11:46:16AM +0200, Nicolas Ferre wrote:
>> Signed-off-by: Nicolas Ferre <nicolas.ferre <at> atmel.com>
>> ---
>>  drivers/tty/serial/atmel_serial.c |    2 +-
>>  1 files changed, 1 insertions(+), 1 deletions(-)
>>
>> diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
>> index a652f8f..453cdb5 100644
>> --- a/drivers/tty/serial/atmel_serial.c
>> +++ b/drivers/tty/serial/atmel_serial.c
>>  <at>  <at>  -1789,7 +1789,7  <at>  <at>  static int __devexit atmel_serial_remove(struct platform_device *pdev)
>>  }
>>  
>>  static struct platform_driver atmel_serial_driver = {
>> -	.probe		= atmel_serial_probe,
>> +	.probe		= __devexit_p(atmel_serial_probe),
> 
> That doesn't match the patch description (and is probably wrong.)

Yes, indeed.
Sorry for the noise!
--

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(Continue reading)

Nicolas Ferre | 3 Oct 2011 12:11

[PATCH 3/3] tty/serial: atmel_serial: __devinit_p for probe function

Signed-off-by: Nicolas Ferre <nicolas.ferre <at> atmel.com>
---
 drivers/tty/serial/atmel_serial.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index a652f8f..e40a10a 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
 <at>  <at>  -1789,7 +1789,7  <at>  <at>  static int __devexit atmel_serial_remove(struct platform_device *pdev)
 }

 static struct platform_driver atmel_serial_driver = {
-	.probe		= atmel_serial_probe,
+	.probe		= __devinit_p(atmel_serial_probe),
 	.remove		= __devexit_p(atmel_serial_remove),
 	.suspend	= atmel_serial_suspend,
 	.resume		= atmel_serial_resume,
--

-- 
1.7.3

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Arnd Bergmann | 3 Oct 2011 11:36

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Re: [PATCH 3/3] tty/serial: atmel_serial: __devinit_p for probe function

On Monday 03 October 2011 12:11:19 Nicolas Ferre wrote:
>  }
>  
>  static struct platform_driver atmel_serial_driver = {
> -       .probe          = atmel_serial_probe,
> +       .probe          = __devinit_p(atmel_serial_probe),
>         .remove         = __devexit_p(atmel_serial_remove),
>         .suspend        = atmel_serial_suspend,
>         .resume         = atmel_serial_resume,

Still wrong: __devinit_p does not exist and is not needed.

What bug are you trying to fix here?

	Arnd
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Nicolas Ferre | 3 Oct 2011 11:49

Re: [PATCH 3/3] tty/serial: atmel_serial: __devinit_p for probe function

On 10/03/2011 11:36 AM, Arnd Bergmann :
> On Monday 03 October 2011 12:11:19 Nicolas Ferre wrote:
>>  }
>>  
>>  static struct platform_driver atmel_serial_driver = {
>> -       .probe          = atmel_serial_probe,
>> +       .probe          = __devinit_p(atmel_serial_probe),
>>         .remove         = __devexit_p(atmel_serial_remove),
>>         .suspend        = atmel_serial_suspend,
>>         .resume         = atmel_serial_resume,
> 
> Still wrong: __devinit_p does not exist and is not needed.

OMG, the not-enouth-coffee syndrome... twice!

So we forget all this and I try to increase my signal/noise ratio 

Bye,
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Vishwanath Sripathy | 3 Oct 2011 17:10

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RE: [PATCH v6 01/16] OMAP2+: hwmod: Add API to enable IO ring wakeup.

---snip--
> > +{
> > +	struct omap_device_pad *pad;
> > +	int ret = -EINVAL, j;
> > +
> > +	if (oh->mux&&  oh->mux->enabled) {
> > +		for (j = 0; j<  oh->mux->nr_pads_dynamic; j++) {
> > +			pad = oh->mux->pads_dynamic[j];
> > +			if (pad->flags&  OMAP_DEVICE_PAD_WAKEUP) {
> > +				if (set_wake)
> > +					pad->idle |= OMAP_WAKEUP_EN;
> > +				else
> > +					pad->idle&= ~OMAP_WAKEUP_EN;
>
> I think apart from enabling/disabling the IO wakeup's at the pad
> level, there is also a need to trigger the IO daisy chain control
> (Wu clock) by programming the PRCM.PM_WKEN_WKUP[16] EN_IO_CHAIN
> bit and waiting on the PRCM.PM_WKST_WKUP[16] ST_IO_CHAIN) bit,
> which is done by the omap3_enable/disable_io_chain function.
> This is still done in the cpuidle path, but it makes sense to
> move that over here, since it should be done every time a pad
> level wakeup is enabled or disabled.
>
> See section 3.5.7.2.2 I/O Wake-Up Mechanism of 36xx TRM revA.
>
> "The I/O wake-up scheme is enabled by triggering the I/O daisy chain
> control (Wu clock) by
> programming a dedicated register (PRCM.PM_WKEN_WKUP[16] EN_IO_CHAIN)
> in
> the PRCM module.Software must wait for the I/O daisy chain to

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Recent entries

[PATCH 0/2] serial: sh-sci: HSCIF support (17 Jun 2013)
[PATCH] serial: mfd: Add sysrq support (14 Jun 2013)
API to flush rx fifo? (12 Jun 2013)
[GIT PATCH] TTY/Serial fixes for 3.10-rc5 (6 Jun 2013)
[PATCH 01/13] ARM: Exynos: initialize l2x0 cache controller only for c (6 Jun 2013)
[PATCH] tty/serial/sirf: fix error propagation in sirfsoc_uart_probe() (5 Jun 2013)
[PATCH v3 1/3] serial: imx: Fix warning when !CONFIG_SERIAL_IMX_CONSOL (5 Jun 2013)
[PATCH -next] serial: omap: fix potential NULL pointer dereference in (5 Jun 2013)
[PATCH v2 1/2] serial: imx: Remove SERIAL_IMX_CONSOLE (4 Jun 2013)
[PATCH] tty: serial: Enable uartlite for ARM zynq (4 Jun 2013)
[PATCH 1/3] serial: imx: Fix warning when !CONFIG_SERIAL_IMX_CONSOLE (4 Jun 2013)
[PATCH V2] serial: imx: enable the clocks only when the uart is used (4 Jun 2013)
[PATCH v6] tty: serial: add Freescale lpuart driver support (4 Jun 2013)
MAX14830 serial driver (1 Jun 2013)
[PATCH] serial/imx: disable hardware flow control at startup (30 May 2013)
Connection to a 3G USB Module using USB-Serial (30 May 2013)
[PATCH v5] tty: serial: add Freescale lpuart driver support (30 May 2013)
[PATCH] serail: imx: add support for DTE mode (30 May 2013)
[PATCH] serial: samsung: missing uart_unregister_driver() on error in (29 May 2013)
[PATCH] driver: tty: add missing unregister in err case (29 May 2013)
[PATCH v4] tty: serial: add Freescale lpuart driver support (28 May 2013)

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