[PATCH RFC 5/6] Switch SPI driver calls its own driver switch register function

[PATCH RFC 5/6] Switch SPI driver calls its own driver switch register function

[Tristram.Ha]

From: Tristram Ha <Tristram.Ha@microchip.com>

SPI driver calls own specific switch register function.
Shutdown callback function is added to reset switch to default state.

Signed-off-by: Tristram Ha <Tristram.Ha@microchip.com>
---
diff --git a/drivers/net/dsa/microchip/ksz_spi.c b/drivers/net/dsa/microchip/ksz_spi.c
index c519469..d03eb83 100644
--- a/drivers/net/dsa/microchip/ksz_spi.c
+++ b/drivers/net/dsa/microchip/ksz_spi.c
@@ -25,6 +25,8 @@
 
 #include "ksz_priv.h"
 
+int ksz9477_switch_register(struct ksz_device *dev);
+
 /* SPI frame opcodes */
 #define KS_SPIOP_RD			3
 #define KS_SPIOP_WR			2
@@ -174,7 +176,7 @@ static int ksz_spi_probe(struct spi_device *spi)
 	if (spi->dev.platform_data)
 		dev->pdata = spi->dev.platform_data;
 
-	ret = ksz_switch_register(dev);
+	ret = ksz9477_switch_register(dev);
 	if (ret)
 		return ret;
 
@@ -193,6 +195,14 @@ static int ksz_spi_remove(struct spi_device *spi)
 	return 0;
 }
 
+static void ksz_spi_shutdown(struct spi_device *spi) {
+	struct ksz_device *dev = spi_get_drvdata(spi);
+
+	if (dev)
+		dev->dev_ops->reset(dev);
+}
+
 static const struct of_device_id ksz_dt_ids[] = {
 	{ .compatible = "microchip,ksz9477" },
 	{},
@@ -207,6 +217,7 @@ static int ksz_spi_remove(struct spi_device *spi)
 	},
 	.probe	= ksz_spi_probe,
 	.remove	= ksz_spi_remove,
+	.shutdown = ksz_spi_shutdown,
 };
 
 module_spi_driver(ksz_spi_driver);

Re: [PATCH RFC 5/6] Switch SPI driver calls its own driver switch register function

[Andrew Lunn]

On Thu, Sep 07, 2017 at 09:09:22PM +0000, Tristram.Ha@microchip.com wrote:
> From: Tristram Ha <Tristram.Ha@microchip.com>
> 
> SPI driver calls own specific switch register function.
> Shutdown callback function is added to reset switch to default state.
> 
> Signed-off-by: Tristram Ha <Tristram.Ha@microchip.com>
> ---
> diff --git a/drivers/net/dsa/microchip/ksz_spi.c b/drivers/net/dsa/microchip/ksz_spi.c
> index c519469..d03eb83 100644
> --- a/drivers/net/dsa/microchip/ksz_spi.c
> +++ b/drivers/net/dsa/microchip/ksz_spi.c
> @@ -25,6 +25,8 @@
>  
>  #include "ksz_priv.h"
>  
> +int ksz9477_switch_register(struct ksz_device *dev);

Hi Tristram

This should be placed in a header file somewhere, not here.

> +static void ksz_spi_shutdown(struct spi_device *spi) {
> +	struct ksz_device *dev = spi_get_drvdata(spi);
> +
> +	if (dev)
> +		dev->dev_ops->reset(dev);

shutdown seems like a better name for this op, not reset.

> +}
> +
>  static const struct of_device_id ksz_dt_ids[] = {
>  	{ .compatible = "microchip,ksz9477" },
>  	{},
> @@ -207,6 +217,7 @@ static int ksz_spi_remove(struct spi_device *spi)
>  	},
>  	.probe	= ksz_spi_probe,
>  	.remove	= ksz_spi_remove,
> +	.shutdown = ksz_spi_shutdown,
>  };
>  
>  module_spi_driver(ksz_spi_driver);