diff mbox series

[v3,4/6] gpio: vf610: add i.MX8ULP of_device_id entry

Message ID 20230918-vf610-gpio-v3-4-ada82a17adc5@nxp.com
State New
Headers show
Series [v3,1/6] dt-bindings: gpio: vf610: update gpio-ranges | expand

Commit Message

Peng Fan (OSS) Sept. 18, 2023, 8:16 a.m. UTC 
From: Peng Fan <peng.fan@nxp.com>

i.MX8ULP GPIO supports similar feature as i.MX7ULP GPIO, but i.MX8ULP is
not compatible with i.MX7ULP per binding doc. i.MX8ULP only has one
register base, not two base.

Add a new of_device_id entry for i.MX8ULP. But to make the driver could
also support old bindings, check the compatible string first, before
check the device data.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/gpio/gpio-vf610.c | 55 +++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 49 insertions(+), 6 deletions(-)

Comments

Marco Felsch Sept. 19, 2023, 2:23 p.m. UTC | #1 
Hi Peng,

please see my notes below.

On 23-09-18, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> i.MX8ULP GPIO supports similar feature as i.MX7ULP GPIO, but i.MX8ULP is
> not compatible with i.MX7ULP per binding doc. i.MX8ULP only has one
> register base, not two base.
> 
> Add a new of_device_id entry for i.MX8ULP. But to make the driver could
> also support old bindings, check the compatible string first, before
> check the device data.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  drivers/gpio/gpio-vf610.c | 55 +++++++++++++++++++++++++++++++++++++++++------
>  1 file changed, 49 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-vf610.c b/drivers/gpio/gpio-vf610.c
> index dbc7ba0ee72c..ef2455093708 100644
> --- a/drivers/gpio/gpio-vf610.c
> +++ b/drivers/gpio/gpio-vf610.c
> @@ -25,6 +25,7 @@
>  struct fsl_gpio_soc_data {
>  	/* SoCs has a Port Data Direction Register (PDDR) */
>  	bool have_paddr;
> +	bool is_imx8ulp;

I would invert the logic:

	bool have_dual_base;

>  };
>  
>  struct vf610_gpio_port {
> @@ -60,13 +61,22 @@ struct vf610_gpio_port {
>  #define PORT_INT_EITHER_EDGE	0xb
>  #define PORT_INT_LOGIC_ONE	0xc
>  
> +#define IMX8ULP_GPIO_BASE_OFF	0x40
> +#define IMX8ULP_BASE_OFF	0x80
> +

static const struct fsl_gpio_soc_data vf610_data = {
	.have_dual_base = true,
};

static const struct fsl_gpio_soc_data imx_data = {
	.have_paddr = true,
	.have_dual_base = true,
};

static const struct fsl_gpio_soc_data imx8ulp_data = {
	.have_paddr = true,
};

This also introduces .data pointer for the vf610 case and we could drop
the 'port->sdata' guard from the
'if (port->sdata && port->sdata->paddr)' pattern. This of course would
be an additional patch.

> +
>  static const struct of_device_id vf610_gpio_dt_ids[] = {
>  	{ .compatible = "fsl,vf610-gpio",	.data = NULL, },
>  	{ .compatible = "fsl,imx7ulp-gpio",	.data = &imx_data, },
> +	{ .compatible = "fsl,imx8ulp-gpio",	.data = &imx8ulp_data, },
>  	{ /* sentinel */ }
>  };
>  
> @@ -255,6 +265,42 @@ static void vf610_gpio_disable_clk(void *data)
>  	clk_disable_unprepare(data);
>  }
>  
> +static int vf610_gpio_map_base(struct platform_device *pdev, struct vf610_gpio_port *port)
> +{
> +	struct device *dev = &pdev->dev;
> +	bool dual_base;
> +
> +	/* support old compatible strings */
> +	if (device_is_compatible(dev, "fsl,imx7ulp-gpio") &&
> +	    (device_is_compatible(dev, "fsl,imx93-gpio") ||
> +	    (device_is_compatible(dev, "fsl,imx8ulp-gpio")))) {
> +		dual_base = true;

Move this part into probe() (see below) and drop the rest.

> +	} else if (port->sdata && port->sdata->is_imx8ulp) {
> +		dual_base = false;
> +	} else {
> +		dual_base = true;
> +	};
> +
> +	if (dual_base) {

	if (port->sdata-have_dual_base) {

> +		port->base = devm_platform_ioremap_resource(pdev, 0);
> +		if (IS_ERR(port->base))
> +			return PTR_ERR(port->base);
> +
> +		port->gpio_base = devm_platform_ioremap_resource(pdev, 1);
> +		if (IS_ERR(port->gpio_base))
> +			return PTR_ERR(port->gpio_base);
> +	} else {
> +		port->base = devm_platform_ioremap_resource(pdev, 0);
> +		if (IS_ERR(port->base))
> +			return PTR_ERR(port->base);
> +
> +		port->gpio_base = port->base + IMX8ULP_GPIO_BASE_OFF;
> +		port->base = port->base + IMX8ULP_BASE_OFF;
> +	}
> +
> +	return 0;
> +}
> +
>  static int vf610_gpio_probe(struct platform_device *pdev)
>  {
>  	struct device *dev = &pdev->dev;
> @@ -269,13 +315,10 @@ static int vf610_gpio_probe(struct platform_device *pdev)
>  		return -ENOMEM;
>  
>  	port->sdata = of_device_get_match_data(dev);

	/* Handle old device-tree bindings */
	if (device_is_compatible(dev, "fsl,imx7ulp-gpio") &&
	    (device_is_compatible(dev, "fsl,imx93-gpio") ||
	    (device_is_compatible(dev, "fsl,imx8ulp-gpio"))))
		port->sdata->have_dual_base = true;

> -	port->base = devm_platform_ioremap_resource(pdev, 0);
> -	if (IS_ERR(port->base))
> -		return PTR_ERR(port->base);
>  
> -	port->gpio_base = devm_platform_ioremap_resource(pdev, 1);
> -	if (IS_ERR(port->gpio_base))
> -		return PTR_ERR(port->gpio_base);
> +	ret = vf610_gpio_map_base(pdev, port);
> +	if (ret)
> +		return ret;
>  
>  	port->irq = platform_get_irq(pdev, 0);
>  	if (port->irq < 0)

Regards,
  Marco
diff mbox series

Patch

diff --git a/drivers/gpio/gpio-vf610.c b/drivers/gpio/gpio-vf610.c
index dbc7ba0ee72c..ef2455093708 100644
--- a/drivers/gpio/gpio-vf610.c
+++ b/drivers/gpio/gpio-vf610.c
@@ -25,6 +25,7 @@ 
 struct fsl_gpio_soc_data {
 	/* SoCs has a Port Data Direction Register (PDDR) */
 	bool have_paddr;
+	bool is_imx8ulp;
 };
 
 struct vf610_gpio_port {
@@ -60,13 +61,22 @@  struct vf610_gpio_port {
 #define PORT_INT_EITHER_EDGE	0xb
 #define PORT_INT_LOGIC_ONE	0xc
 
+#define IMX8ULP_GPIO_BASE_OFF	0x40
+#define IMX8ULP_BASE_OFF	0x80
+
 static const struct fsl_gpio_soc_data imx_data = {
 	.have_paddr = true,
 };
 
+static const struct fsl_gpio_soc_data imx8ulp_data = {
+	.have_paddr = true,
+	.is_imx8ulp = true,
+};
+
 static const struct of_device_id vf610_gpio_dt_ids[] = {
 	{ .compatible = "fsl,vf610-gpio",	.data = NULL, },
 	{ .compatible = "fsl,imx7ulp-gpio",	.data = &imx_data, },
+	{ .compatible = "fsl,imx8ulp-gpio",	.data = &imx8ulp_data, },
 	{ /* sentinel */ }
 };
 
@@ -255,6 +265,42 @@  static void vf610_gpio_disable_clk(void *data)
 	clk_disable_unprepare(data);
 }
 
+static int vf610_gpio_map_base(struct platform_device *pdev, struct vf610_gpio_port *port)
+{
+	struct device *dev = &pdev->dev;
+	bool dual_base;
+
+	/* support old compatible strings */
+	if (device_is_compatible(dev, "fsl,imx7ulp-gpio") &&
+	    (device_is_compatible(dev, "fsl,imx93-gpio") ||
+	    (device_is_compatible(dev, "fsl,imx8ulp-gpio")))) {
+		dual_base = true;
+	} else if (port->sdata && port->sdata->is_imx8ulp) {
+		dual_base = false;
+	} else {
+		dual_base = true;
+	};
+
+	if (dual_base) {
+		port->base = devm_platform_ioremap_resource(pdev, 0);
+		if (IS_ERR(port->base))
+			return PTR_ERR(port->base);
+
+		port->gpio_base = devm_platform_ioremap_resource(pdev, 1);
+		if (IS_ERR(port->gpio_base))
+			return PTR_ERR(port->gpio_base);
+	} else {
+		port->base = devm_platform_ioremap_resource(pdev, 0);
+		if (IS_ERR(port->base))
+			return PTR_ERR(port->base);
+
+		port->gpio_base = port->base + IMX8ULP_GPIO_BASE_OFF;
+		port->base = port->base + IMX8ULP_BASE_OFF;
+	}
+
+	return 0;
+}
+
 static int vf610_gpio_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -269,13 +315,10 @@  static int vf610_gpio_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	port->sdata = of_device_get_match_data(dev);
-	port->base = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(port->base))
-		return PTR_ERR(port->base);
 
-	port->gpio_base = devm_platform_ioremap_resource(pdev, 1);
-	if (IS_ERR(port->gpio_base))
-		return PTR_ERR(port->gpio_base);
+	ret = vf610_gpio_map_base(pdev, port);
+	if (ret)
+		return ret;
 
 	port->irq = platform_get_irq(pdev, 0);
 	if (port->irq < 0)