Add an optional GPIO to be used for a hardware reset of the IC.
Signed-off-by: Alexandru Tachici <[email protected]>
---
drivers/net/ethernet/adi/adin1110.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/drivers/net/ethernet/adi/adin1110.c b/drivers/net/ethernet/adi/adin1110.c
index 78ded19dd8c1..3e090ff9b966 100644
--- a/drivers/net/ethernet/adi/adin1110.c
+++ b/drivers/net/ethernet/adi/adin1110.c
@@ -1082,9 +1082,30 @@ static void adin1110_adjust_link(struct net_device *dev)
*/
static int adin1110_check_spi(struct adin1110_priv *priv)
{
+ struct gpio_desc *reset_gpio;
int ret;
u32 val;
+ reset_gpio = devm_gpiod_get_optional(&priv->spidev->dev, "reset",
+ GPIOD_OUT_LOW);
+ if (reset_gpio) {
+ /* MISO pin is used for internal configuration, can't have
+ * anyone else disturbing the SDO line.
+ */
+ spi_bus_lock(priv->spidev->controller);
+
+ gpiod_set_value(reset_gpio, 1);
+ fsleep(10000);
+ gpiod_set_value(reset_gpio, 0);
+
+ /* Need to wait 90 ms before interacting with
+ * the MAC after a HW reset.
+ */
+ fsleep(90000);
+
+ spi_bus_unlock(priv->spidev->controller);
+ }
+
ret = adin1110_read_reg(priv, ADIN1110_PHY_ID, &val);
if (ret < 0)
return ret;
--
2.34.1
Document GPIO for HW reset.
Signed-off-by: Alexandru Tachici <[email protected]>
---
Documentation/devicetree/bindings/net/adi,adin1110.yaml | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/adi,adin1110.yaml b/Documentation/devicetree/bindings/net/adi,adin1110.yaml
index b6bd8ee38a18..9de865295d7a 100644
--- a/Documentation/devicetree/bindings/net/adi,adin1110.yaml
+++ b/Documentation/devicetree/bindings/net/adi,adin1110.yaml
@@ -46,6 +46,10 @@ properties:
interrupts:
maxItems: 1
+ reset-gpios:
+ maxItems: 1
+ description: GPIO connected to active low reset
+
required:
- compatible
- reg
--
2.34.1
On 19/10/2022 13:13, Alexandru Tachici wrote:
> Document GPIO for HW reset.
>
> Signed-off-by: Alexandru Tachici <[email protected]>
> ---
Acked-by: Krzysztof Kozlowski <[email protected]>
Best regards,
Krzysztof
Hello:
This series was applied to netdev/net-next.git (master)
by David S. Miller <[email protected]>:
On Wed, 19 Oct 2022 20:13:13 +0300 you wrote:
> Add an optional GPIO to be used for a hardware reset of the IC.
>
> Signed-off-by: Alexandru Tachici <[email protected]>
> ---
> drivers/net/ethernet/adi/adin1110.c | 21 +++++++++++++++++++++
> 1 file changed, 21 insertions(+)
Here is the summary with links:
- [net-next,1/2] net: ethernet: adi: adin1110: add reset GPIO
https://git.kernel.org/netdev/net-next/c/36934cac7aaf
- [net-next,2/2] dt-bindings: net: adin1110: Document reset
https://git.kernel.org/netdev/net-next/c/3bd5549bd479
You are awesome, thank you!
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