linux-kernel - Re: [PATCH v4 1/2] gpio: designware: switch device node to fwnode and add acpi binding

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Message-ID: <56D539A6.1080906@huawei.com>
Date:	Tue, 1 Mar 2016 14:41:42 +0800
From:	Jiang Qiu <qiujiang@...wei.com>
To:	Andy Shevchenko <andy.shevchenko@...il.com>
CC:	Linus Walleij <linus.walleij@...aro.org>,
	Alexandre Courbot <gnurou@...il.com>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	<linuxarm@...wei.com>, <haifeng.wei@...wei.com>,
	<charles.chenxin@...wei.com>
Subject: Re: [PATCH v4 1/2] gpio: designware: switch device node to fwnode and
 add acpi binding

在 2016/2/29 21:51, Andy Shevchenko 写道:
> On Mon, Feb 29, 2016 at 3:13 PM, qiujiang <qiujiang@...wei.com> wrote:
>> This patch switches device node to fwnode and adds acpi
>> binding. As a result, DT and acpi bingdings are compatible
>> for this driver.
> 
> I'm not sure it makes sense to add ACPI binding here. It more logical
> to me to add them in patch 2/2.
> And I see that it touches different subsystems.
> 
>>
>> Acked-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> 
> Due to above and Mika's Ack was only to ACPI parts, I think
> you may be split this also to two and we will have clearly logical set:
> 1. Convert to fwnode
> 2. Add ACPI bindings
> 3. ACPI event support.
> 
> Does it sound okay to you?
> 
> If you do that I give my
> Acked-by: Andy Shevchenko <andy.shevchenko@...il.com>
> to intel_quark_i2c_gpio.c part and
> Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
> to the rest.
> 
>> Signed-off-by: qiujiang <qiujiang@...wei.com>
>> ---
>>  drivers/gpio/gpio-dwapb.c                | 62 +++++++++++++++++++-------------
>>  drivers/mfd/intel_quark_i2c_gpio.c       |  2 +-
>>  include/linux/platform_data/gpio-dwapb.h |  2 +-
>>  3 files changed, 39 insertions(+), 27 deletions(-)
>>
>> diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
>> index 597de1e..7a37c65 100644
>> --- a/drivers/gpio/gpio-dwapb.c
>> +++ b/drivers/gpio/gpio-dwapb.c
>> @@ -7,6 +7,7 @@
>>   *
>>   * All enquiries to support@...ochip.com
>>   */
>> +#include <linux/acpi.h>
> 
> +#include <linux/property.h> instead (see above).
> 
>>  #include <linux/gpio/driver.h>
>>  /* FIXME: for gpio_get_value(), replace this with direct register read */
>>  #include <linux/gpio.h>
> 
>> @@ -496,18 +492,27 @@ dwapb_gpio_get_pdata_of(struct device *dev)
>>                  * Only port A can provide interrupts in all configurations of
>>                  * the IP.
>>                  */
>> -               if (pp->idx == 0 &&
>> -                   of_property_read_bool(port_np, "interrupt-controller")) {
>> -                       pp->irq = irq_of_parse_and_map(port_np, 0);
>> +               if (dev->of_node && pp->idx == 0 &&
>> +                       of_property_read_bool(to_of_node(fwnode),
>> +                               "interrupt-controller")) {
> 
>> +               if (has_acpi_companion(dev) && pp->idx == 0)
>> +                       pp->irq = platform_get_irq(to_platform_device(dev), 0);
>> +
> 
> To patch 2.
> 
>>                 pp->irq_shared  = false;
>>                 pp->gpio_base   = -1;
> 
>> -               pp->name        = port_np->full_name;
>> +
>> +               if (dev->of_node)
>> +                       pp->name = to_of_node(fwnode)->full_name;
>> +
> 
> And here you have to provide something in case of default / built-in
> device properties.
Sorry, I'm not very clear here about the case of default / built-in device
properties, can you give a example about what will the code look like ?
> 
> 
>> +               if (has_acpi_companion(dev))
>> +                       pp->name = acpi_dev_name(to_acpi_device_node(fwnode));
> 
> To patch 2.
> 
>>         }
>>
>>         return pdata;
> 
>> @@ -580,6 +585,12 @@ static const struct of_device_id dwapb_of_match[] = {
>>  };
>>  MODULE_DEVICE_TABLE(of, dwapb_of_match);
>>
>> +static const struct acpi_device_id dwapb_acpi_match[] = {
>> +       {"HISI0181", 0},
>> +       { }
>> +};
>> +MODULE_DEVICE_TABLE(acpi, dwapb_acpi_match);
>> +
>>  #ifdef CONFIG_PM_SLEEP
>>  static int dwapb_gpio_suspend(struct device *dev)
>>  {
>> @@ -674,6 +685,7 @@ static struct platform_driver dwapb_gpio_driver = {
>>                 .name   = "gpio-dwapb",
>>                 .pm     = &dwapb_gpio_pm_ops,
>>                 .of_match_table = of_match_ptr(dwapb_of_match),
>> +               .acpi_match_table = ACPI_PTR(dwapb_acpi_match),
>>         },
>>         .probe          = dwapb_gpio_probe,
>>         .remove         = dwapb_gpio_remove,
> 
> Ditto to the above hunks.
>