Re: [PATCH 2/3] gpio: syscon: use generic device properties
From: Bartosz Golaszewski
Date: Mon Sep 30 2024 - 07:32:48 EST
On Mon, Sep 30, 2024 at 12:32 PM Bartosz Golaszewski <brgl@xxxxxxxx> wrote:
>
> From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
>
> OF-specific routines should not be used unless necessary. Generic device
> properties are preferred so switch to using them in the driver code.
>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
> ---
> drivers/gpio/gpio-syscon.c | 20 ++++++++------------
> 1 file changed, 8 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/gpio/gpio-syscon.c b/drivers/gpio/gpio-syscon.c
> index 638095d5f459..06c07085feb8 100644
> --- a/drivers/gpio/gpio-syscon.c
> +++ b/drivers/gpio/gpio-syscon.c
> @@ -9,7 +9,6 @@
> #include <linux/gpio/driver.h>
> #include <linux/mfd/syscon.h>
> #include <linux/module.h>
> -#include <linux/of.h>
> #include <linux/platform_device.h>
> #include <linux/regmap.h>
>
> @@ -208,12 +207,13 @@ static int syscon_gpio_probe(struct platform_device *pdev)
> struct device_node *np = dev->of_node;
> int ret;
> bool use_parent_regmap = false;
> + unsigned int props[] = { 0, 0 };
>
> priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> if (!priv)
> return -ENOMEM;
>
> - priv->data = of_device_get_match_data(dev);
> + priv->data = device_get_match_data(dev);
>
> priv->syscon = syscon_regmap_lookup_by_phandle(np, "gpio,syscon-dev");
> if (IS_ERR(priv->syscon) && np->parent) {
> @@ -224,19 +224,15 @@ static int syscon_gpio_probe(struct platform_device *pdev)
> return PTR_ERR(priv->syscon);
>
> if (!use_parent_regmap) {
> - ret = of_property_read_u32_index(np, "gpio,syscon-dev", 1,
> - &priv->dreg_offset);
> - if (ret)
> + ret = device_property_read_u32_array(dev, "gpio,syscon-dev",
> + props, 2);
> + if (ret < 0)
> dev_err(dev, "can't read the data register offset!\n");
> -
> - priv->dreg_offset <<= 3;
> -
> - ret = of_property_read_u32_index(np, "gpio,syscon-dev", 2,
> - &priv->dir_reg_offset);
> - if (ret)
> + if (ret != 2)
Sorry, this is wrong, it doesn't return the prop count unless val is NULL.
I'll send a better version.
Bart
> dev_dbg(dev, "can't read the dir register offset!\n");
>
> - priv->dir_reg_offset <<= 3;
> + priv->dreg_offset = props[0] << 3;
> + priv->dir_reg_offset = props[1] << 3;
> }
>
> priv->chip.parent = dev;
> --
> 2.43.0
>