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Date: Fri, 11 Mar 2016 08:44:38 +0800
From: Jiang Qiu <qiujiang@...wei.com>
To: Alan Tull <delicious.quinoa@...il.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>
Subject: Re: [PATCH v5 1/3] gpio: designware: convert device node to fwnode
在 2016/3/11 3:09, Alan Tull 写道:
> 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
Agree, "to_of_node" should be never used since it coverted to fwnode.
I will give a more reasonable solution in the next version.
Thanks, Jiang
>
>> + 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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