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

[Tristram.Ha]

From: Tristram Ha <tristram...@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...@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);