diff options
| author | David S. Miller <davem@davemloft.net> | 2018-12-10 12:07:56 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-12-10 12:07:56 -0800 |
| commit | c535293f6351c7047fdaebde4d8b0f665a98a481 (patch) | |
| tree | a89b500b359e10fed23a61c28c65b373d0aac7c9 | |
| parent | 4e6feb7adb9a69e51271eae4715d546507c1e998 (diff) | |
| parent | 924352c3d6347d96528cebcef9461cebe928c117 (diff) | |
Merge branch 'dsa-ksz-Add-reset-GPIO-handling'
Marek Vasut says:
====================
net: dsa: ksz: Add reset GPIO handling
Add code to handle optional reset GPIO in the KSZ switch driver and a
matching DT property adjustments.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | Documentation/devicetree/bindings/net/dsa/ksz.txt | 4 | ||||
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_common.c | 17 | ||||
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_priv.h | 2 |
3 files changed, 23 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/dsa/ksz.txt b/Documentation/devicetree/bindings/net/dsa/ksz.txt index ac145b885e95..0f407fb371ce 100644 --- a/Documentation/devicetree/bindings/net/dsa/ksz.txt +++ b/Documentation/devicetree/bindings/net/dsa/ksz.txt @@ -8,6 +8,10 @@ Required properties: - "microchip,ksz9477" - "microchip,ksz9897" +Optional properties: + +- reset-gpios : Should be a gpio specifier for a reset line + See Documentation/devicetree/bindings/net/dsa/dsa.txt for a list of additional required and optional properties. 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; |