diff mbox series

[v6,3/4] serial: 8250_aspeed_vuart: add aspeed,lpc-io-reg and aspeed,lpc-interrupts DT properties

Message ID 20210412034712.16778-4-zev@bewilderbeest.net
State New
Headers show
Series serial: 8250_aspeed_vuart: generalized DT properties | expand

Commit Message

Zev Weiss April 12, 2021, 3:47 a.m. UTC
These allow describing all the Aspeed VUART attributes currently
available via sysfs.  aspeed,lpc-interrupts provides a replacement for
the deprecated aspeed,sirq-polarity-sense property.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
---
 drivers/tty/serial/8250/8250_aspeed_vuart.c | 51 ++++++++++++++++++++-
 1 file changed, 49 insertions(+), 2 deletions(-)

Comments

Andy Shevchenko April 15, 2021, 10:46 a.m. UTC | #1
On Mon, Apr 12, 2021 at 7:05 AM Zev Weiss <zev@bewilderbeest.net> wrote:
>

> These allow describing all the Aspeed VUART attributes currently

> available via sysfs.  aspeed,lpc-interrupts provides a replacement for

> the deprecated aspeed,sirq-polarity-sense property.


One nit-pick below.

In any case it's fine.

> Signed-off-by: Zev Weiss <zev@bewilderbeest.net>

> ---

>  drivers/tty/serial/8250/8250_aspeed_vuart.c | 51 ++++++++++++++++++++-

>  1 file changed, 49 insertions(+), 2 deletions(-)

>

> diff --git a/drivers/tty/serial/8250/8250_aspeed_vuart.c b/drivers/tty/serial/8250/8250_aspeed_vuart.c

> index 8433f8dbb186..3c239d98747f 100644

> --- a/drivers/tty/serial/8250/8250_aspeed_vuart.c

> +++ b/drivers/tty/serial/8250/8250_aspeed_vuart.c

> @@ -28,6 +28,10 @@

>  #define ASPEED_VUART_ADDRL             0x28

>  #define ASPEED_VUART_ADDRH             0x2c

>

> +#define ASPEED_VUART_DEFAULT_LPC_ADDR  0x3f8

> +#define ASPEED_VUART_DEFAULT_SIRQ      4

> +#define ASPEED_VUART_DEFAULT_SIRQ_POLARITY     IRQ_TYPE_LEVEL_LOW

> +

>  struct aspeed_vuart {

>         struct device           *dev;

>         void __iomem            *regs;

> @@ -386,6 +390,18 @@ static void aspeed_vuart_auto_configure_sirq_polarity(

>         aspeed_vuart_set_sirq_polarity(vuart, (value & reg_mask) == 0);

>  }

>

> +static int aspeed_vuart_map_irq_polarity(u32 dt)

> +{

> +       switch (dt) {

> +       case IRQ_TYPE_LEVEL_LOW:

> +               return 0;

> +       case IRQ_TYPE_LEVEL_HIGH:

> +               return 1;

> +       default:

> +               return -EINVAL;

> +       }

> +}

> +

>  static int aspeed_vuart_probe(struct platform_device *pdev)

>  {

>         struct of_phandle_args sirq_polarity_sense_args;

> @@ -393,8 +409,8 @@ static int aspeed_vuart_probe(struct platform_device *pdev)

>         struct aspeed_vuart *vuart;

>         struct device_node *np;

>         struct resource *res;

> -       u32 clk, prop;

> -       int rc;

> +       u32 clk, prop, sirq[2];

> +       int rc, sirq_polarity;

>

>         np = pdev->dev.of_node;

>

> @@ -501,6 +517,37 @@ static int aspeed_vuart_probe(struct platform_device *pdev)

>                 of_node_put(sirq_polarity_sense_args.np);

>         }

>

> +       rc = of_property_read_u32(np, "aspeed,lpc-io-reg", &prop);

> +       if (rc < 0)

> +               prop = ASPEED_VUART_DEFAULT_LPC_ADDR;

> +

> +       rc = aspeed_vuart_set_lpc_address(vuart, prop);

> +       if (rc < 0) {

> +               dev_err(&pdev->dev, "invalid value in aspeed,lpc-io-reg property\n");

> +               goto err_clk_disable;

> +       }

> +

> +       rc = of_property_read_u32_array(np, "aspeed,lpc-interrupts", sirq, 2);

> +       if (rc < 0) {

> +               sirq[0] = ASPEED_VUART_DEFAULT_SIRQ;

> +               sirq[1] = ASPEED_VUART_DEFAULT_SIRQ_POLARITY;

> +       }

> +

> +       rc = aspeed_vuart_set_sirq(vuart, sirq[0]);

> +       if (rc < 0) {

> +               dev_err(&pdev->dev, "invalid sirq number in aspeed,lpc-interrupts property\n");

> +               goto err_clk_disable;

> +       }

> +

> +       sirq_polarity = aspeed_vuart_map_irq_polarity(sirq[1]);

> +       if (sirq_polarity < 0) {

> +               dev_err(&pdev->dev, "invalid sirq polarity in aspeed,lpc-interrupts property\n");


> +               rc = sirq_polarity;

> +               goto err_clk_disable;

> +       }


Why not to use the same pattern as above, i.e.

       rc = aspeed_vuart_map_irq_polarity(sirq[1]);
       if (rc < 0) {
               dev_err(&pdev->dev, "invalid sirq polarity in
aspeed,lpc-interrupts property\n");
               goto err_clk_disable;
       }
       sirq_polarity = rc;

?

> +       aspeed_vuart_set_sirq_polarity(vuart, sirq_polarity);

> +

>         aspeed_vuart_set_enabled(vuart, true);

>         aspeed_vuart_set_host_tx_discard(vuart, true);

>         platform_set_drvdata(pdev, vuart);



-- 
With Best Regards,
Andy Shevchenko
diff mbox series

Patch

diff --git a/drivers/tty/serial/8250/8250_aspeed_vuart.c b/drivers/tty/serial/8250/8250_aspeed_vuart.c
index 8433f8dbb186..3c239d98747f 100644
--- a/drivers/tty/serial/8250/8250_aspeed_vuart.c
+++ b/drivers/tty/serial/8250/8250_aspeed_vuart.c
@@ -28,6 +28,10 @@ 
 #define ASPEED_VUART_ADDRL		0x28
 #define ASPEED_VUART_ADDRH		0x2c
 
+#define ASPEED_VUART_DEFAULT_LPC_ADDR	0x3f8
+#define ASPEED_VUART_DEFAULT_SIRQ	4
+#define ASPEED_VUART_DEFAULT_SIRQ_POLARITY	IRQ_TYPE_LEVEL_LOW
+
 struct aspeed_vuart {
 	struct device		*dev;
 	void __iomem		*regs;
@@ -386,6 +390,18 @@  static void aspeed_vuart_auto_configure_sirq_polarity(
 	aspeed_vuart_set_sirq_polarity(vuart, (value & reg_mask) == 0);
 }
 
+static int aspeed_vuart_map_irq_polarity(u32 dt)
+{
+	switch (dt) {
+	case IRQ_TYPE_LEVEL_LOW:
+		return 0;
+	case IRQ_TYPE_LEVEL_HIGH:
+		return 1;
+	default:
+		return -EINVAL;
+	}
+}
+
 static int aspeed_vuart_probe(struct platform_device *pdev)
 {
 	struct of_phandle_args sirq_polarity_sense_args;
@@ -393,8 +409,8 @@  static int aspeed_vuart_probe(struct platform_device *pdev)
 	struct aspeed_vuart *vuart;
 	struct device_node *np;
 	struct resource *res;
-	u32 clk, prop;
-	int rc;
+	u32 clk, prop, sirq[2];
+	int rc, sirq_polarity;
 
 	np = pdev->dev.of_node;
 
@@ -501,6 +517,37 @@  static int aspeed_vuart_probe(struct platform_device *pdev)
 		of_node_put(sirq_polarity_sense_args.np);
 	}
 
+	rc = of_property_read_u32(np, "aspeed,lpc-io-reg", &prop);
+	if (rc < 0)
+		prop = ASPEED_VUART_DEFAULT_LPC_ADDR;
+
+	rc = aspeed_vuart_set_lpc_address(vuart, prop);
+	if (rc < 0) {
+		dev_err(&pdev->dev, "invalid value in aspeed,lpc-io-reg property\n");
+		goto err_clk_disable;
+	}
+
+	rc = of_property_read_u32_array(np, "aspeed,lpc-interrupts", sirq, 2);
+	if (rc < 0) {
+		sirq[0] = ASPEED_VUART_DEFAULT_SIRQ;
+		sirq[1] = ASPEED_VUART_DEFAULT_SIRQ_POLARITY;
+	}
+
+	rc = aspeed_vuart_set_sirq(vuart, sirq[0]);
+	if (rc < 0) {
+		dev_err(&pdev->dev, "invalid sirq number in aspeed,lpc-interrupts property\n");
+		goto err_clk_disable;
+	}
+
+	sirq_polarity = aspeed_vuart_map_irq_polarity(sirq[1]);
+	if (sirq_polarity < 0) {
+		dev_err(&pdev->dev, "invalid sirq polarity in aspeed,lpc-interrupts property\n");
+		rc = sirq_polarity;
+		goto err_clk_disable;
+	}
+
+	aspeed_vuart_set_sirq_polarity(vuart, sirq_polarity);
+
 	aspeed_vuart_set_enabled(vuart, true);
 	aspeed_vuart_set_host_tx_discard(vuart, true);
 	platform_set_drvdata(pdev, vuart);