Re: [PATCH v9 2/3] gpio: dwapb: convert device node to fwnode

[Andy Shevchenko <andy.shevchenko@gmail.com>]

On Wed, Apr 20, 2016 at 10:13 AM, Jiang Qiu <qiujiang@huawei.com> wrote:
> This patch converts device node to fwnode for dwapb driver, so
> as to provide a unified fwnode for DT and ACPI bindings.
>
> Tested-by: Alan Tull <delicious.quinoa@gmail.com>
> Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
> Signed-off-by: Jiang Qiu <qiujiang@huawei.com>
> ---
>  drivers/gpio/gpio-dwapb.c                | 37 ++++++++++++++++----------------
>  drivers/mfd/intel_quark_i2c_gpio.c       |  2 +-
>  include/linux/platform_data/gpio-dwapb.h |  2 +-
>  3 files changed, 20 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
> index 772d743..92bc204 100644
> --- a/drivers/gpio/gpio-dwapb.c
> +++ b/drivers/gpio/gpio-dwapb.c
> @@ -22,6 +22,7 @@
>  #include <linux/of_address.h>
>  #include <linux/of_irq.h>
>  #include <linux/platform_device.h>
> +#include <linux/property.h>
>  #include <linux/spinlock.h>
>  #include <linux/platform_data/gpio-dwapb.h>
>  #include <linux/slab.h>
> @@ -290,14 +291,14 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
>                                  struct dwapb_port_property *pp)
>  {
>         struct gpio_chip *gc = &port->gc;
> -       struct device_node *node = pp->node;
> +       struct fwnode_handle  *fwnode = pp->fwnode;
>         struct irq_chip_generic *irq_gc = NULL;
>         unsigned int hwirq, ngpio = gc->ngpio;
>         struct irq_chip_type *ct;
>         int err, i;
>
> -       gpio->domain = irq_domain_add_linear(node, ngpio,
> -                                            &irq_generic_chip_ops, gpio);
> +       gpio->domain = irq_domain_create_linear(fwnode, ngpio,
> +                                                &irq_generic_chip_ops, gpio);
>         if (!gpio->domain)
>                 return;
>
> @@ -415,7 +416,8 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio,
>         }
>
>  #ifdef CONFIG_OF_GPIO
> -       port->gc.of_node = pp->node;
> +       port->gc.of_node = is_of_node(pp->fwnode) ?
> +               to_of_node(pp->fwnode) : NULL;

Someone commented on this that it's simple
…of_node = to_of_node(…);

>  #endif
>         port->gc.ngpio = pp->ngpio;
>         port->gc.base = pp->gpio_base;
> @@ -447,19 +449,15 @@ static void dwapb_gpio_unregister(struct dwapb_gpio *gpio)
>  }
>
>  static struct dwapb_platform_data *
> -dwapb_gpio_get_pdata_of(struct device *dev)
> +dwapb_gpio_get_pdata(struct device *dev)
>  {
> -       struct device_node *node, *port_np;
> +       struct fwnode_handle *fwnode;
>         struct dwapb_platform_data *pdata;
>         struct dwapb_port_property *pp;
>         int nports;
>         int i;
>
> -       node = dev->of_node;
> -       if (!IS_ENABLED(CONFIG_OF_GPIO) || !node)
> -               return ERR_PTR(-ENODEV);
> -
> -       nports = of_get_child_count(node);
> +       nports = device_get_child_node_count(dev);
>         if (nports == 0)
>                 return ERR_PTR(-ENODEV);
>
> @@ -474,18 +472,18 @@ dwapb_gpio_get_pdata_of(struct device *dev)
>         pdata->nports = nports;
>
>         i = 0;
> -       for_each_child_of_node(node, port_np) {
> +       device_for_each_child_node(dev, fwnode)  {
>                 pp = &pdata->properties[i++];
> -               pp->node = port_np;
> +               pp->fwnode = fwnode;
>
> -               if (of_property_read_u32(port_np, "reg", &pp->idx) ||
> +               if (fwnode_property_read_u32(fwnode, "reg", &pp->idx) ||
>                     pp->idx >= DWAPB_MAX_PORTS) {
>                         dev_err(dev,
>                                 "missing/invalid port index for port%d\n", i);
>                         return ERR_PTR(-EINVAL);
>                 }
>
> -               if (of_property_read_u32(port_np, "snps,nr-gpios",
> +               if (fwnode_property_read_u32(fwnode, "snps,nr-gpios",
>                                          &pp->ngpio)) {
>                         dev_info(dev,
>                                  "failed to get number of gpios for port%d\n",
> @@ -497,9 +495,10 @@ 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 &&
> +                       fwnode_property_read_bool(fwnode,
> +                                                 "interrupt-controller")) {
> +                       pp->irq = irq_of_parse_and_map(to_of_node(fwnode), 0);
>                         if (!pp->irq)
>                                 dev_warn(dev, "no irq for port%d\n", pp->idx);
>                 }
> @@ -521,7 +520,7 @@ static int dwapb_gpio_probe(struct platform_device *pdev)
>         struct dwapb_platform_data *pdata = dev_get_platdata(dev);
>
>         if (!pdata) {
> -               pdata = dwapb_gpio_get_pdata_of(dev);
> +               pdata = dwapb_gpio_get_pdata(dev);
>                 if (IS_ERR(pdata))
>                         return PTR_ERR(pdata);
>         }
> diff --git a/drivers/mfd/intel_quark_i2c_gpio.c b/drivers/mfd/intel_quark_i2c_gpio.c
> index a4ef99b..a24b35f 100644
> --- a/drivers/mfd/intel_quark_i2c_gpio.c
> +++ b/drivers/mfd/intel_quark_i2c_gpio.c
> @@ -219,7 +219,7 @@ static int intel_quark_gpio_setup(struct pci_dev *pdev, struct mfd_cell *cell)
>                 return -ENOMEM;
>
>         /* Set the properties for portA */
> -       pdata->properties->node         = NULL;
> +       pdata->properties->fwnode       = NULL;
>         pdata->properties->idx          = 0;
>         pdata->properties->ngpio        = INTEL_QUARK_MFD_NGPIO;
>         pdata->properties->gpio_base    = INTEL_QUARK_MFD_GPIO_BASE;
> diff --git a/include/linux/platform_data/gpio-dwapb.h b/include/linux/platform_data/gpio-dwapb.h
> index 955b579..2dc7f4a 100644
> --- a/include/linux/platform_data/gpio-dwapb.h
> +++ b/include/linux/platform_data/gpio-dwapb.h
> @@ -15,7 +15,7 @@
>  #define GPIO_DW_APB_H
>
>  struct dwapb_port_property {
> -       struct device_node *node;
> +       struct fwnode_handle *fwnode;
>         unsigned int    idx;
>         unsigned int    ngpio;
>         unsigned int    gpio_base;
> --
> 1.9.1
>



-- 
With Best Regards,
Andy Shevchenko