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Date: Thu, 10 Mar 2016 13:09:46 -0600
From: Alan Tull <delicious.quinoa@...il.com>
To: qiujiang <qiujiang@...wei.com>
Cc: Linus Walleij <linus.walleij@...aro.org>,
Alexandre Courbot <gnurou@...il.com>,
mika.westerberg@...ux.intel.com, andy.shevchenko@...il.com,
linux-kernel <linux-kernel@...r.kernel.org>,
"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
linux-acpi@...r.kernel.org, linuxarm@...wei.com,
haifeng.wei@...wei.com, charles.chenxin@...wei.com,
Alan Tull <delicious.quinoa@...il.com>
Subject: Re: [PATCH v5 1/3] gpio: designware: convert device node to fwnode
On Fri, Mar 4, 2016 at 1:44 AM, qiujiang <qiujiang@...wei.com> wrote:
> This patch converts device node to fwnode in
> dwapb_port_property for designware gpio driver,
> so as to provide a unified data structure for DT
> and ACPI bindings.
>
> Acked-by: Andy Shevchenko <andy.shevchenko@...il.com>
> Signed-off-by: qiujiang <qiujiang@...wei.com>
> ---
> drivers/gpio/gpio-dwapb.c | 43 +++++++++++++++-----------------
> drivers/mfd/intel_quark_i2c_gpio.c | 2 +-
> include/linux/platform_data/gpio-dwapb.h | 2 +-
> 3 files changed, 22 insertions(+), 25 deletions(-)
>
> diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
> index 597de1e..49f6e5d 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;
> #endif
> port->gc.ngpio = pp->ngpio;
> port->gc.base = pp->gpio_base;
> @@ -449,17 +451,13 @@ static void dwapb_gpio_unregister(struct dwapb_gpio *gpio)
> static struct dwapb_platform_data *
> dwapb_gpio_get_pdata_of(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);
>
> @@ -474,21 +472,19 @@ 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 %s\n",
> - port_np->full_name);
> + dev_err(dev, "missing/invalid port index\n");
> 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 %s\n",
> - port_np->full_name);
> + dev_info(dev, "failed to get number of gpios\n");
> pp->ngpio = 32;
> }
>
> @@ -496,18 +492,19 @@ 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")) {
Hi Qiujiang,
Is there a reason to use "of_property_read_bool" here instead of
"device_property_read_bool" or similar?
Alan
> + pp->irq = irq_of_parse_and_map(to_of_node(fwnode), 0);
> if (!pp->irq) {
> dev_warn(dev, "no irq for bank %s\n",
> - port_np->full_name);
> + to_of_node(fwnode)->full_name);
> }
> }
>
> pp->irq_shared = false;
> pp->gpio_base = -1;
> - pp->name = port_np->full_name;
> + pp->name = to_of_node(fwnode)->full_name;
> }
>
> return pdata;
> diff --git a/drivers/mfd/intel_quark_i2c_gpio.c b/drivers/mfd/intel_quark_i2c_gpio.c
> index 0421374..265bd3c 100644
> --- a/drivers/mfd/intel_quark_i2c_gpio.c
> +++ b/drivers/mfd/intel_quark_i2c_gpio.c
> @@ -227,7 +227,7 @@ 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->name = "intel-quark-x1000-gpio-portA";
> pdata->properties->idx = 0;
> pdata->properties->ngpio = INTEL_QUARK_MFD_NGPIO;
> diff --git a/include/linux/platform_data/gpio-dwapb.h b/include/linux/platform_data/gpio-dwapb.h
> index 28702c8..c5bd1f2 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;
> const char *name;
> unsigned int idx;
> unsigned int ngpio;
> --
> 1.9.1
>
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