Re: [PATCH v2 1/1] gpio: rockchip: Switch to use fwnode instead of of_node

From: Bartosz Golaszewski
Date: Wed Aug 31 2022 - 11:11:54 EST

On Wed, Aug 31, 2022 at 3:45 PM Andy Shevchenko
<andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
>
> GPIO library now accepts fwnode as a firmware node, so
> switch the driver to use it.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> ---
> v2: fixed compilation errors (LKP), replace some OF calls (Bart)
> drivers/gpio/gpio-rockchip.c | 38 +++++++++++-------------------
> drivers/pinctrl/pinctrl-rockchip.h | 2 --
> 2 files changed, 14 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c
> index bb50335239ac..e8fa99fd4c80 100644
> --- a/drivers/gpio/gpio-rockchip.c
> +++ b/drivers/gpio/gpio-rockchip.c
> @@ -14,12 +14,11 @@
> #include <linux/init.h>
> #include <linux/interrupt.h>
> #include <linux/io.h>
> +#include <linux/mod_devicetable.h>
> #include <linux/module.h>
> #include <linux/of.h>
> -#include <linux/of_address.h>
> -#include <linux/of_device.h>
> -#include <linux/of_irq.h>
> #include <linux/pinctrl/pinconf-generic.h>
> +#include <linux/property.h>
> #include <linux/regmap.h>
>
> #include "../pinctrl/core.h"
> @@ -518,7 +517,7 @@ static int rockchip_interrupts_register(struct rockchip_pin_bank *bank)
> struct irq_chip_generic *gc;
> int ret;
>
> - bank->domain = irq_domain_add_linear(bank->of_node, 32,
> + bank->domain = irq_domain_create_linear(dev_fwnode(bank->dev), 32,
> &irq_generic_chip_ops, NULL);
> if (!bank->domain) {
> dev_warn(bank->dev, "could not init irq domain for bank %s\n",
> @@ -606,14 +605,10 @@ static int rockchip_gpiolib_register(struct rockchip_pin_bank *bank)
> * files which don't set the "gpio-ranges" property or systems that
> * utilize ACPI the driver has to call gpiochip_add_pin_range().
> */
> - if (!of_property_read_bool(bank->of_node, "gpio-ranges")) {
> - struct device_node *pctlnp = of_get_parent(bank->of_node);
> + if (!device_property_read_bool(bank->dev, "gpio-ranges")) {
> struct pinctrl_dev *pctldev = NULL;
>
> - if (!pctlnp)
> - return -ENODATA;
> -
> - pctldev = of_pinctrl_get(pctlnp);
> + pctldev = pinctrl_get(bank->dev->parent);
> if (!pctldev)
> return -ENODEV;
>
> @@ -641,23 +636,20 @@ static int rockchip_gpiolib_register(struct rockchip_pin_bank *bank)
>
> static int rockchip_get_bank_data(struct rockchip_pin_bank *bank)
> {
> + struct platform_device *pdev = to_platform_device(bank->dev);
> + struct device_node *np = bank->dev->of_node;
> struct resource res;
> int id = 0;
>
> - if (of_address_to_resource(bank->of_node, 0, &res)) {
> - dev_err(bank->dev, "cannot find IO resource for bank\n");
> - return -ENOENT;
> - }
> -
> - bank->reg_base = devm_ioremap_resource(bank->dev, &res);
> + bank->reg_base = devm_platform_ioremap_resource(pdev, 0);
> if (IS_ERR(bank->reg_base))
> return PTR_ERR(bank->reg_base);
>
> - bank->irq = irq_of_parse_and_map(bank->of_node, 0);
> + bank->irq = platform_get_irq(pdev, 0);
> if (!bank->irq)
> return -EINVAL;
>
> - bank->clk = of_clk_get(bank->of_node, 0);
> + bank->clk = of_clk_get(np, 0);

Why did you stop above? Why not regular clk_get here?

> if (IS_ERR(bank->clk))
> return PTR_ERR(bank->clk);
>
> @@ -668,7 +660,7 @@ static int rockchip_get_bank_data(struct rockchip_pin_bank *bank)
> if (id == GPIO_TYPE_V2 || id == GPIO_TYPE_V2_1) {
> bank->gpio_regs = &gpio_regs_v2;
> bank->gpio_type = GPIO_TYPE_V2;
> - bank->db_clk = of_clk_get(bank->of_node, 1);
> + bank->db_clk = of_clk_get(np, 1);

Ah, the clocks don't have names in DT? That's unfortunate...

Bart

> if (IS_ERR(bank->db_clk)) {
> dev_err(bank->dev, "cannot find debounce clk\n");
> clk_disable_unprepare(bank->clk);
> @@ -705,17 +697,16 @@ static int rockchip_gpio_probe(struct platform_device *pdev)
> {
> struct device *dev = &pdev->dev;
> struct device_node *np = dev->of_node;
> - struct device_node *pctlnp = of_get_parent(np);
> struct pinctrl_dev *pctldev = NULL;
> struct rockchip_pin_bank *bank = NULL;
> struct rockchip_pin_deferred *cfg;
> static int gpio;
> int id, ret;
>
> - if (!np || !pctlnp)
> + if (!dev->parent)
> return -ENODEV;
>
> - pctldev = of_pinctrl_get(pctlnp);
> + pctldev = pinctrl_get(dev->parent);
> if (!pctldev)
> return -EPROBE_DEFER;
>
> @@ -728,7 +719,6 @@ static int rockchip_gpio_probe(struct platform_device *pdev)
> return -EINVAL;
>
> bank->dev = dev;
> - bank->of_node = np;
>
> raw_spin_lock_init(&bank->slock);
>
> @@ -776,7 +766,7 @@ static int rockchip_gpio_probe(struct platform_device *pdev)
> mutex_unlock(&bank->deferred_lock);
>
> platform_set_drvdata(pdev, bank);
> - dev_info(dev, "probed %pOF\n", np);
> + dev_info(dev, "probed %pfw\n", dev_fwnode(dev));
>
> return 0;
> }
> diff --git a/drivers/pinctrl/pinctrl-rockchip.h b/drivers/pinctrl/pinctrl-rockchip.h
> index 4759f336941e..37a0501bcc03 100644
> --- a/drivers/pinctrl/pinctrl-rockchip.h
> +++ b/drivers/pinctrl/pinctrl-rockchip.h
> @@ -299,7 +299,6 @@ struct rockchip_drv {
> * @drv: array describing the 4 drive strength sources of the bank
> * @pull_type: array describing the 4 pull type sources of the bank
> * @valid: is all necessary information present
> - * @of_node: dt node of this bank
> * @drvdata: common pinctrl basedata
> * @domain: irqdomain of the gpio bank
> * @gpio_chip: gpiolib chip
> @@ -327,7 +326,6 @@ struct rockchip_pin_bank {
> struct rockchip_drv drv[4];
> enum rockchip_pin_pull_type pull_type[4];
> bool valid;
> - struct device_node *of_node;
> struct rockchip_pinctrl *drvdata;
> struct irq_domain *domain;
> struct gpio_chip gpio_chip;
> --
> 2.35.1
>