On Tue, Jan 31, 2017 at 11:16:01AM +0530, Raju Lakkaraju wrote:
> From: Raju Lakkaraju <raju.lakkar...@microsemi.com>
>
> LED Mode:
> Microsemi PHY support 2 LEDs (LED[0] and LED[1]) to display different
> status information that can be selected by setting LED mode.
>
> LED Mode parameter (vddmac, led-0-mode) and (vddmac, led-1-mode) get
> from Device Tree.
Hi Raju
How is vddmac an LED mode parameter?
> Signed-off-by: Raju Lakkaraju <raju.lakkar...@microsemi.com>
> ---
> .../devicetree/bindings/net/mscc-phy-vsc8531.txt | 39 ++++++++++++
> drivers/net/phy/mscc.c | 72
> ++++++++++++++++++++++
> 2 files changed, 111 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
> b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
> index bdefefc6..1abf4b6 100644
> --- a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
> +++ b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
> @@ -27,6 +27,12 @@ Optional properties:
> 'vddmac'.
> Default value is 0%.
> Ref: Table:1 - Edge rate change (below).
> +- vsc8531,led-0-mode : LED mode. Specify how the LED[0] should behave.
> + Allowed values is listed in the 'PHY LED Mode' -
> + Table 2 (below). Default value is 1.
> +- vsc8531,led-1-mode : LED mode. Specify how the LED[1] should behave.
> + Allowed values is listed in the 'PHY LED Mode' -
> + Table 2 (below). Default value is 2.
>
> Table: 1 - Edge rate change
> ----------------------------------------------------------------|
> @@ -54,10 +60,43 @@ Table: 1 - Edge rate change
> | (slowest) |
> |---------------------------------------------------------------|
>
> +Table: 2 - PHY LED Mode
> +|-----------------------------------------------|
> +| LINK_ACTIVITY | 0 |
> +|-----------------------------------------------|
> +| LINK_1000_ACTIVITY | 1 |
> +|-----------------------------------------------|
> +| LINK_100_ACTIVITY | 2 |
> +|-----------------------------------------------|
> +| LINK_10_ACTIVITY | 3 |
> +|-----------------------------------------------|
> +| LINK_100_1000_ACTIVITY | 4 |
> +|-----------------------------------------------|
> +| LINK_10_1000_ACTIVITY | 5 |
> +|-----------------------------------------------|
> +| LINK_10_100_ACTIVITY | 6 |
> +|-----------------------------------------------|
> +| DUPLEX_COLLISION | 8 |
> +|-----------------------------------------------|
> +| COLLISION | 9 |
> +|-----------------------------------------------|
> +| ACTIVITY | 10 |
> +|-----------------------------------------------|
> +| AUTONEG_FAULT | 12 |
> +|-----------------------------------------------|
> +| SERIAL_MODE | 13 |
> +|-----------------------------------------------|
> +| FORCE_LED_OFF | 14 |
> +|-----------------------------------------------|
> +| FORCE_LED_ON | 15 |
> +|-----------------------------------------------|
> +
> Example:
>
> vsc8531_0: ethernet-phy@0 {
> compatible = "ethernet-phy-id0007.0570";
> vsc8531,vddmac = <3300>;
> vsc8531,edge-slowdown = <7>;
> + vsc8531,led-0-mode = <1>;
> + vsc8531,led-1-mode = <2>;
Numbers like this are pretty unreadable. I would suggest adding a header file in
include/dt-bindings/net/
> +static int vsc85xx_led_cntl_set(struct phy_device *phydev,
> + u8 led_num,
> + u8 mode)
> +{
> + int rc;
> + u16 reg_val;
> +
> + mutex_lock(&phydev->lock);
> + reg_val = phy_read(phydev, MSCC_PHY_LED_MODE_SEL);
> + if (led_num) {
> + reg_val &= ~LED_1_MODE_SEL_MASK;
> + reg_val |= (((u16)mode << LED_1_MODE_SEL_POS) &
> + LED_1_MODE_SEL_MASK);
> + } else {
> + reg_val |= ((u16)mode & LED_0_MODE_SEL_MASK);
> + }
The asymmetry here makes me think this is wrong.
> + rc = phy_write(phydev, MSCC_PHY_LED_MODE_SEL, reg_val);
> + mutex_unlock(&phydev->lock);
> +
> + return rc;
> +}
> +
> static int vsc85xx_mdix_get(struct phy_device *phydev, u8 *mdix)
> {
> u16 reg_val;
> @@ -499,6 +547,13 @@ static int vsc85xx_config_init(struct phy_device *phydev)
> if (rc)
> return rc;
>
> + rc = vsc85xx_led_cntl_set(phydev, 1, vsc8531->led_1_mode);
> + if (rc)
> + return rc;
> + rc = vsc85xx_led_cntl_set(phydev, 0, vsc8531->led_0_mode);
> + if (rc)
> + return rc;
> +
> rc = genphy_config_init(phydev);
>
> return rc;
> @@ -555,8 +610,13 @@ static int vsc85xx_read_status(struct phy_device *phydev)
>
> static int vsc85xx_probe(struct phy_device *phydev)
> {
> + int rc;
> int rate_magic;
> + u8 led_0_mode;
> + u8 led_1_mode;
> struct vsc8531_private *vsc8531;
> + struct device *dev = &phydev->mdio.dev;
> + struct device_node *of_node = dev->of_node;
declarations are supposed to be reverse Christmas tree. i.e. longest
lines first.
>
> rate_magic = vsc85xx_edge_rate_magic_get(phydev);
> if (rate_magic < 0)
> @@ -570,6 +630,18 @@ static int vsc85xx_probe(struct phy_device *phydev)
>
> vsc8531->rate_magic = rate_magic;
>
> + /* LED[0] and LED[1] mode */
> + rc = of_property_read_u8(of_node, "vsc8531,led-0-mode", &led_0_mode);
> + if (rc != 0)
Please simplify this to just if (rc). Actually, it can be even
simpler. of_property_read_u8 guarantees not to modify the return
value unless it has a value to return. So
vsc8531->led_0_mode = LINK_1000_ACTIVITY;
err = of_property_read_u8(of_node, "vsc8531,led-0-mode", &led_0_mode);
if (err != EINVAL)
return err;
vsc8531->led_1_mode = LINK_100_ACTIVITY;
err = of_property_read_u8(of_node, "vsc8531,led-1-mode", &led_1_mode);
if (err != EINVAL)
return err;
What about range checking? I could put 42 in the device tree for led
0, and it would set led 1 as well i think?
Andrew
