diff options
| author |   Marek Vasut <marex@denx.de> | 2018-12-10 14:43:06 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-12-10 12:07:56 -0800 |
| commit | 924352c3d6347d96528cebcef9461cebe928c117 (patch) | |
| tree | a89b500b359e10fed23a61c28c65b373d0aac7c9 | |
| parent | net: dsa: ksz: Add optional reset GPIO to Microchip KSZ switch binding (diff) | |
| download | linux-dev-924352c3d6347d96528cebcef9461cebe928c117.tar.xz linux-dev-924352c3d6347d96528cebcef9461cebe928c117.zip | |
net: dsa: ksz: Add reset GPIO handling
Add code to handle optional reset GPIO in the KSZ switch driver. The switch
has a reset GPIO line which can be controlled by the CPU, so make sure it is
configured correctly in such setups.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Cc: Woojung Huh <woojung.huh@microchip.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Tristram Ha <Tristram.Ha@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_common.c | 17 | ||||
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_priv.h | 2 |
2 files changed, 19 insertions, 0 deletions
diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c index 9705808c3af7..3b12e2dcff31 100644 --- a/drivers/net/dsa/microchip/ksz_common.c +++ b/drivers/net/dsa/microchip/ksz_common.c @@ -8,12 +8,14 @@ #include <linux/delay.h> #include <linux/export.h> #include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_data/microchip-ksz.h> #include <linux/phy.h> #include <linux/etherdevice.h> #include <linux/if_bridge.h> +#include <linux/of_gpio.h> #include <linux/of_net.h> #include <net/dsa.h> #include <net/switchdev.h> @@ -294,6 +296,17 @@ int ksz_switch_register(struct ksz_device *dev, if (dev->pdata) dev->chip_id = dev->pdata->chip_id; + dev->reset_gpio = devm_gpiod_get_optional(dev->dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(dev->reset_gpio)) + return PTR_ERR(dev->reset_gpio); + + if (dev->reset_gpio) { + gpiod_set_value(dev->reset_gpio, 1); + mdelay(10); + gpiod_set_value(dev->reset_gpio, 0); + } + mutex_init(&dev->reg_mutex); mutex_init(&dev->stats_mutex); mutex_init(&dev->alu_mutex); @@ -329,6 +342,10 @@ void ksz_switch_remove(struct ksz_device *dev) { dev->dev_ops->exit(dev); dsa_unregister_switch(dev->ds); + + if (dev->reset_gpio) + gpiod_set_value(dev->reset_gpio, 1); + } EXPORT_SYMBOL(ksz_switch_remove); diff --git a/drivers/net/dsa/microchip/ksz_priv.h b/drivers/net/dsa/microchip/ksz_priv.h index a38ff0841ed4..60b49010904b 100644 --- a/drivers/net/dsa/microchip/ksz_priv.h +++ b/drivers/net/dsa/microchip/ksz_priv.h @@ -59,6 +59,8 @@ struct ksz_device { void *priv; + struct gpio_desc *reset_gpio; /* Optional reset GPIO */ + /* chip specific data */ u32 chip_id; int num_vlans; |