[PATCH v2 net-next] net: phy: Add LED mode driver for Microsemi

[PATCH v2 net-next] net: phy: Add LED mode driver for Microsemi

[Raju Lakkaraju]

From: Raju Lakkaraju <Raju.Lakkaraju@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 (vsc8531, led-0-mode) and (vsc8531, led-1-mode) get from
Device Tree.

Tested on Beaglebone Black with VSC 8531 PHY.

Change set:
v0:
- Initial version of LED driver for Microsemi PHYs.
v1:
- Update all review comments given by Andrew.
- Add new header file "mscc-phy-vsc8531.h" to define DT macros.
- Add error/range check for DT LED mode input
v2:
- Fixed x86_64 build error.

Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microsemi.com>


Raju Lakkaraju (1):
  net: phy: Add LED mode driver for Microsemi PHYs.

 .../devicetree/bindings/net/mscc-phy-vsc8531.txt   | 10 +++
 drivers/net/phy/mscc.c                             | 85 +++++++++++++++++++++-
 include/dt-bindings/net/mscc-phy-vsc8531.h         | 29 ++++++++
 3 files changed, 123 insertions(+), 1 deletion(-)
 create mode 100644 include/dt-bindings/net/mscc-phy-vsc8531.h

-- 
2.7.4

[PATCH v2 net-next] net: phy: Add LED mode driver for Microsemi PHYs.

[Raju Lakkaraju]

From: Raju Lakkaraju <Raju.Lakkaraju@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 (vsc8531, led-0-mode) and (vsc8531, led-1-mode) get
from Device Tree.

Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microsemi.com>
---
 .../devicetree/bindings/net/mscc-phy-vsc8531.txt   | 10 +++
 drivers/net/phy/mscc.c                             | 85 +++++++++++++++++++++-
 include/dt-bindings/net/mscc-phy-vsc8531.h         | 29 ++++++++
 3 files changed, 123 insertions(+), 1 deletion(-)
 create mode 100644 include/dt-bindings/net/mscc-phy-vsc8531.h

diff --git a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
index bdefefc6..bb7450c 100644
--- a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
+++ b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
@@ -27,6 +27,14 @@ 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 are define in
+			  "include/dt-bindings/net/mscc-phy-vsc8531.h".
+			  Default value is 1.
+- vsc8531,led-1-mode	: LED mode. Specify how the LED[1] should behave.
+			  Allowed values are define in
+			  "include/dt-bindings/net/mscc-phy-vsc8531.h".
+			  Default value is 2.
 
 Table: 1 - Edge rate change
 ----------------------------------------------------------------|
@@ -60,4 +68,6 @@ Example:
                 compatible = "ethernet-phy-id0007.0570";
                 vsc8531,vddmac		= <3300>;
                 vsc8531,edge-slowdown	= <7>;
+                vsc8531,led-0-mode	= <LINK_1000_ACTIVITY>;
+                vsc8531,led-1-mode	= <LINK_100_ACTIVITY>;
         };
diff --git a/drivers/net/phy/mscc.c b/drivers/net/phy/mscc.c
index e03ead8..f0cb7cc 100644
--- a/drivers/net/phy/mscc.c
+++ b/drivers/net/phy/mscc.c
@@ -13,6 +13,7 @@
 #include <linux/phy.h>
 #include <linux/of.h>
 #include <linux/netdevice.h>
+#include <dt-bindings/net/mscc-phy-vsc8531.h>
 
 enum rgmii_rx_clock_delay {
 	RGMII_RX_CLK_DELAY_0_2_NS = 0,
@@ -52,6 +53,11 @@ enum rgmii_rx_clock_delay {
 #define MSCC_PHY_DEV_AUX_CNTL		  28
 #define HP_AUTO_MDIX_X_OVER_IND_MASK	  0x2000
 
+#define MSCC_PHY_LED_MODE_SEL		  29
+#define LED_1_MODE_SEL_MASK		  0x00F0
+#define LED_0_MODE_SEL_MASK		  0x000F
+#define LED_1_MODE_SEL_POS		  4
+
 #define MSCC_EXT_PAGE_ACCESS		  31
 #define MSCC_PHY_PAGE_STANDARD		  0x0000 /* Standard registers */
 #define MSCC_PHY_PAGE_EXTENDED		  0x0001 /* Extended registers */
@@ -99,6 +105,8 @@ enum rgmii_rx_clock_delay {
 
 struct vsc8531_private {
 	int rate_magic;
+	u8 led_0_mode;
+	u8 led_1_mode;
 };
 
 #ifdef CONFIG_OF_MDIO
@@ -123,6 +131,29 @@ static int vsc85xx_phy_page_set(struct phy_device *phydev, u8 page)
 	return rc;
 }
 
+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 &= ~LED_0_MODE_SEL_MASK;
+		reg_val |= ((u16)mode & LED_0_MODE_SEL_MASK);
+	}
+	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;
@@ -370,11 +401,43 @@ static int vsc85xx_edge_rate_magic_get(struct phy_device *phydev)
 
 	return -EINVAL;
 }
+
+static int vsc85xx_dt_led_mode_get(struct phy_device *phydev,
+				   char *led,
+				   u8 default_mode)
+{
+	struct device *dev = &phydev->mdio.dev;
+	struct device_node *of_node = dev->of_node;
+	u8 led_mode;
+	int rc;
+
+	if (!of_node)
+		return -ENODEV;
+
+	rc = of_property_read_u8(of_node, led, &led_mode);
+	if ((rc == 0) &&
+	    ((led_mode > 15) || (led_mode == 7) || (led_mode == 11))) {
+		phydev_err(phydev, "DT %s invalid\n", led);
+		return -EINVAL;
+	} else if (rc == -EINVAL) {
+		return default_mode;
+	}
+
+	return led_mode;
+}
+
 #else
 static int vsc85xx_edge_rate_magic_get(struct phy_device *phydev)
 {
 	return 0;
 }
+
+static int vsc85xx_dt_led_mode_get(struct phy_device *phydev,
+				   char *led,
+				   u8 default_mode)
+{
+	return default_mode;
+}
 #endif /* CONFIG_OF_MDIO */
 
 static int vsc85xx_edge_rate_cntl_set(struct phy_device *phydev, u8 edge_rate)
@@ -499,6 +562,13 @@ 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 +625,9 @@ static int vsc85xx_read_status(struct phy_device *phydev)
 
 static int vsc85xx_probe(struct phy_device *phydev)
 {
-	int rate_magic;
 	struct vsc8531_private *vsc8531;
+	int rate_magic;
+	int led_mode;
 
 	rate_magic = vsc85xx_edge_rate_magic_get(phydev);
 	if (rate_magic < 0)
@@ -570,6 +641,18 @@ static int vsc85xx_probe(struct phy_device *phydev)
 
 	vsc8531->rate_magic = rate_magic;
 
+	/* LED[0] and LED[1] mode */
+	led_mode = vsc85xx_dt_led_mode_get(phydev, "vsc8531,led-0-mode",
+					   LINK_1000_ACTIVITY);
+	if (led_mode < 0)
+		return led_mode;
+	vsc8531->led_0_mode = led_mode;
+	led_mode = vsc85xx_dt_led_mode_get(phydev, "vsc8531,led-1-mode",
+					   LINK_100_ACTIVITY);
+	if (led_mode < 0)
+		return led_mode;
+	vsc8531->led_1_mode = led_mode;
+
 	return 0;
 }
 
diff --git a/include/dt-bindings/net/mscc-phy-vsc8531.h b/include/dt-bindings/net/mscc-phy-vsc8531.h
new file mode 100644
index 0000000..af6af98
--- /dev/null
+++ b/include/dt-bindings/net/mscc-phy-vsc8531.h
@@ -0,0 +1,29 @@
+/*
+ * Device Tree constants for Microsemi VSC8531 PHY
+ *
+ * Author: Nagaraju Lakkaraju
+ *
+ * License: Dual MIT/GPL
+ * Copyright (c) 2017 Microsemi Corporation
+ */
+
+#ifndef _DT_BINDINGS_MSCC_VSC8531_H
+#define _DT_BINDINGS_MSCC_VSC8531_H
+
+/* PHY LED Modes */
+#define LINK_ACTIVITY           0
+#define LINK_1000_ACTIVITY      1
+#define LINK_100_ACTIVITY       2
+#define LINK_10_ACTIVITY        3
+#define LINK_100_1000_ACTIVITY  4
+#define LINK_10_1000_ACTIVITY   5
+#define LINK_10_100_ACTIVITY    6
+#define DUPLEX_COLLISION        8
+#define COLLISION               9
+#define ACTIVITY                10
+#define AUTONEG_FAULT           12
+#define SERIAL_MODE             13
+#define FORCE_LED_OFF           14
+#define FORCE_LED_ON            15
+
+#endif
-- 
2.7.4

Re: [PATCH v2 net-next] net: phy: Add LED mode driver for Microsemi PHYs.

[Andrew Lunn]

On Wed, Feb 01, 2017 at 06:23:46PM +0530, Raju Lakkaraju wrote:
> From: Raju Lakkaraju <Raju.Lakkaraju@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 (vsc8531, led-0-mode) and (vsc8531, led-1-mode) get
> from Device Tree.
> 
> Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microsemi.com>
> ---
>  .../devicetree/bindings/net/mscc-phy-vsc8531.txt   | 10 +++
>  drivers/net/phy/mscc.c                             | 85 +++++++++++++++++++++-
>  include/dt-bindings/net/mscc-phy-vsc8531.h         | 29 ++++++++
>  3 files changed, 123 insertions(+), 1 deletion(-)
>  create mode 100644 include/dt-bindings/net/mscc-phy-vsc8531.h
> 
> diff --git a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
> index bdefefc6..bb7450c 100644
> --- a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
> +++ b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
> @@ -27,6 +27,14 @@ 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 are define in
> +			  "include/dt-bindings/net/mscc-phy-vsc8531.h".
> +			  Default value is 1.

1 is not very useful. What does it mean? How about:

			Default value is LINK_1000_ACTIVITY (1)     	      	      	   

> +- vsc8531,led-1-mode	: LED mode. Specify how the LED[1] should behave.
> +			  Allowed values are define in
> +			  "include/dt-bindings/net/mscc-phy-vsc8531.h".
> +			  Default value is 2.
>  
>  Table: 1 - Edge rate change
>  ----------------------------------------------------------------|
> @@ -60,4 +68,6 @@ Example:
>                  compatible = "ethernet-phy-id0007.0570";
>                  vsc8531,vddmac		= <3300>;
>                  vsc8531,edge-slowdown	= <7>;
> +                vsc8531,led-0-mode	= <LINK_1000_ACTIVITY>;
> +                vsc8531,led-1-mode	= <LINK_100_ACTIVITY>;
>          };
> diff --git a/drivers/net/phy/mscc.c b/drivers/net/phy/mscc.c
> index e03ead8..f0cb7cc 100644
> --- a/drivers/net/phy/mscc.c
> +++ b/drivers/net/phy/mscc.c
> @@ -13,6 +13,7 @@
>  #include <linux/phy.h>
>  #include <linux/of.h>
>  #include <linux/netdevice.h>
> +#include <dt-bindings/net/mscc-phy-vsc8531.h>
>  
>  enum rgmii_rx_clock_delay {
>  	RGMII_RX_CLK_DELAY_0_2_NS = 0,
> @@ -52,6 +53,11 @@ enum rgmii_rx_clock_delay {
>  #define MSCC_PHY_DEV_AUX_CNTL		  28
>  #define HP_AUTO_MDIX_X_OVER_IND_MASK	  0x2000
>  
> +#define MSCC_PHY_LED_MODE_SEL		  29
> +#define LED_1_MODE_SEL_MASK		  0x00F0
> +#define LED_0_MODE_SEL_MASK		  0x000F
> +#define LED_1_MODE_SEL_POS		  4
> +
>  #define MSCC_EXT_PAGE_ACCESS		  31
>  #define MSCC_PHY_PAGE_STANDARD		  0x0000 /* Standard registers */
>  #define MSCC_PHY_PAGE_EXTENDED		  0x0001 /* Extended registers */
> @@ -99,6 +105,8 @@ enum rgmii_rx_clock_delay {
>  
>  struct vsc8531_private {
>  	int rate_magic;
> +	u8 led_0_mode;
> +	u8 led_1_mode;
>  };
>  
>  #ifdef CONFIG_OF_MDIO
> @@ -123,6 +131,29 @@ static int vsc85xx_phy_page_set(struct phy_device *phydev, u8 page)
>  	return rc;
>  }
>  
> +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 &= ~LED_0_MODE_SEL_MASK;
> +		reg_val |= ((u16)mode & LED_0_MODE_SEL_MASK);
> +	}
> +	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;
> @@ -370,11 +401,43 @@ static int vsc85xx_edge_rate_magic_get(struct phy_device *phydev)
>  
>  	return -EINVAL;
>  }
> +
> +static int vsc85xx_dt_led_mode_get(struct phy_device *phydev,
> +				   char *led,
> +				   u8 default_mode)
> +{
> +	struct device *dev = &phydev->mdio.dev;
> +	struct device_node *of_node = dev->of_node;
> +	u8 led_mode;
> +	int rc;
> +
> +	if (!of_node)
> +		return -ENODEV;
> +
> +	rc = of_property_read_u8(of_node, led, &led_mode);
> +	if ((rc == 0) &&
> +	    ((led_mode > 15) || (led_mode == 7) || (led_mode == 11))) {
> +		phydev_err(phydev, "DT %s invalid\n", led);
> +		return -EINVAL;
> +	} else if (rc == -EINVAL) {
> +		return default_mode;
> +	}

I don't think you understood my comment about of_property_read_u8()
not modifying &led_mode on error. Please read the comment again, and
simplify this.

> +
> +	return led_mode;
> +}
> +
>  #else
>  static int vsc85xx_edge_rate_magic_get(struct phy_device *phydev)
>  {
>  	return 0;
>  }
> +
> +static int vsc85xx_dt_led_mode_get(struct phy_device *phydev,
> +				   char *led,
> +				   u8 default_mode)
> +{
> +	return default_mode;
> +}
>  #endif /* CONFIG_OF_MDIO */
>  
>  static int vsc85xx_edge_rate_cntl_set(struct phy_device *phydev, u8 edge_rate)
> @@ -499,6 +562,13 @@ 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;

Blank line please.

> +	rc = vsc85xx_led_cntl_set(phydev, 0, vsc8531->led_0_mode);
> +	if (rc)
> +		return rc;
> +
>  	rc = genphy_config_init(phydev);
>  
>  	return rc;
> @@ -555,8 +625,9 @@ static int vsc85xx_read_status(struct phy_device *phydev)
>  
>  static int vsc85xx_probe(struct phy_device *phydev)
>  {
> -	int rate_magic;
>  	struct vsc8531_private *vsc8531;
> +	int rate_magic;
> +	int led_mode;
>  
>  	rate_magic = vsc85xx_edge_rate_magic_get(phydev);
>  	if (rate_magic < 0)
> @@ -570,6 +641,18 @@ static int vsc85xx_probe(struct phy_device *phydev)
>  
>  	vsc8531->rate_magic = rate_magic;
>  
> +	/* LED[0] and LED[1] mode */
> +	led_mode = vsc85xx_dt_led_mode_get(phydev, "vsc8531,led-0-mode",
> +					   LINK_1000_ACTIVITY);
> +	if (led_mode < 0)
> +		return led_mode;
> +	vsc8531->led_0_mode = led_mode;

Blank line.

> +	led_mode = vsc85xx_dt_led_mode_get(phydev, "vsc8531,led-1-mode",
> +					   LINK_100_ACTIVITY);
> +	if (led_mode < 0)
> +		return led_mode;
> +	vsc8531->led_1_mode = led_mode;
> +
>  	return 0;
>  }
>  
> diff --git a/include/dt-bindings/net/mscc-phy-vsc8531.h b/include/dt-bindings/net/mscc-phy-vsc8531.h
> new file mode 100644
> index 0000000..af6af98
> --- /dev/null
> +++ b/include/dt-bindings/net/mscc-phy-vsc8531.h
> @@ -0,0 +1,29 @@
> +/*
> + * Device Tree constants for Microsemi VSC8531 PHY
> + *
> + * Author: Nagaraju Lakkaraju
> + *
> + * License: Dual MIT/GPL
> + * Copyright (c) 2017 Microsemi Corporation
> + */
> +
> +#ifndef _DT_BINDINGS_MSCC_VSC8531_H
> +#define _DT_BINDINGS_MSCC_VSC8531_H
> +
> +/* PHY LED Modes */
> +#define LINK_ACTIVITY           0
> +#define LINK_1000_ACTIVITY      1
> +#define LINK_100_ACTIVITY       2
> +#define LINK_10_ACTIVITY        3
> +#define LINK_100_1000_ACTIVITY  4
> +#define LINK_10_1000_ACTIVITY   5
> +#define LINK_10_100_ACTIVITY    6
> +#define DUPLEX_COLLISION        8
> +#define COLLISION               9
> +#define ACTIVITY                10
> +#define AUTONEG_FAULT           12
> +#define SERIAL_MODE             13
> +#define FORCE_LED_OFF           14
> +#define FORCE_LED_ON            15

You should prefix these with VSC8531_. Otherwise there is potential to
have issues with two different PHYs defining some of these frequently
used macros.

     Andrew

Re: [PATCH v2 net-next] net: phy: Add LED mode driver for Microsemi PHYs.

[Raju Lakkaraju]

Hi Andrew,

Thank you for given review comments.

On Wed, Feb 01, 2017 at 02:55:55PM +0100, Andrew Lunn wrote:
> EXTERNAL EMAIL
> 
> 
> On Wed, Feb 01, 2017 at 06:23:46PM +0530, Raju Lakkaraju wrote:
> > From: Raju Lakkaraju <Raju.Lakkaraju-dzo6w/eZyo2tG0bUXCXiUA@public.gmane.org>
> >
> > LED Mode:
> > +                       "include/dt-bindings/net/mscc-phy-vsc8531.h".
> > +                       Default value is 1.
> 
> 1 is not very useful. What does it mean? How about:
> 
>                         Default value is LINK_1000_ACTIVITY (1)
> 

Accepted.

> > +- vsc8531,led-1-mode : LED mode. Specify how the LED[1] should behave.
> > +                       Allowed values are define in
> > +     int rc;
> > +
> > +     if (!of_node)
> > +             return -ENODEV;
> > +
> > +     rc = of_property_read_u8(of_node, led, &led_mode);
> > +     if ((rc == 0) &&
> > +         ((led_mode > 15) || (led_mode == 7) || (led_mode == 11))) {
> > +             phydev_err(phydev, "DT %s invalid\n", led);
> > +             return -EINVAL;
> > +     } else if (rc == -EINVAL) {
> > +             return default_mode;
> > +     }
> 
> I don't think you understood my comment about of_property_read_u8()
> not modifying &led_mode on error. Please read the comment again, and
> simplify this.
> 

If i understand your comment correctly, in case of return value -EINVAL, it
should return error. Am i correct?

i would perfer in case of of_property_read_u8( ) returns -EINVAL, 
i would like to configure LEDs with default state. Shall i configure?

Still if you think i did not understand your comments, please write little
bit more.

> > +
> > +     return led_mode;
> > +}
> > +
> >  #else
> >  static int vsc85xx_edge_rate_magic_get(struct phy_device *phydev)
> >  {
> >       return 0;
> >  }
> > +
> > +static int vsc85xx_dt_led_mode_get(struct phy_device *phydev,
> > +                                char *led,
> > +                                u8 default_mode)
> > +{
> > +     return default_mode;
> > +}
> >  #endif /* CONFIG_OF_MDIO */
> >
> >  static int vsc85xx_edge_rate_cntl_set(struct phy_device *phydev, u8 edge_rate)
> > @@ -499,6 +562,13 @@ 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;
> 
> Blank line please.
> 

Accepted.

> > +     rc = vsc85xx_led_cntl_set(phydev, 0, vsc8531->led_0_mode);
> > +     if (rc)
> > +             return rc;
> > +
> >       rc = genphy_config_init(phydev);
> >
> >       return rc;
> > @@ -555,8 +625,9 @@ static int vsc85xx_read_status(struct phy_device *phydev)
> > +     led_mode = vsc85xx_dt_led_mode_get(phydev, "vsc8531,led-0-mode",
> > +                                        LINK_1000_ACTIVITY);
> > +     if (led_mode < 0)
> > +             return led_mode;
> > +     vsc8531->led_0_mode = led_mode;
> 
> Blank line.
> 

Accepted.

> > +     led_mode = vsc85xx_dt_led_mode_get(phydev, "vsc8531,led-1-mode",
> > +                                        LINK_100_ACTIVITY);
> > +#define AUTONEG_FAULT           12
> > +#define SERIAL_MODE             13
> > +#define FORCE_LED_OFF           14
> > +#define FORCE_LED_ON            15
> 
> You should prefix these with VSC8531_. Otherwise there is potential to
> have issues with two different PHYs defining some of these frequently
> used macros.
> 

Accepted.

>      Andrew

---
Thanks,
Raju.

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Re: [PATCH v2 net-next] net: phy: Add LED mode driver for Microsemi PHYs.

[Andrew Lunn]

> > > +- vsc8531,led-1-mode : LED mode. Specify how the LED[1] should behave.
> > > +                       Allowed values are define in
> > > +     int rc;
> > > +
> > > +     if (!of_node)
> > > +             return -ENODEV;
> > > +
> > > +     rc = of_property_read_u8(of_node, led, &led_mode);
> > > +     if ((rc == 0) &&
> > > +         ((led_mode > 15) || (led_mode == 7) || (led_mode == 11))) {
> > > +             phydev_err(phydev, "DT %s invalid\n", led);
> > > +             return -EINVAL;
> > > +     } else if (rc == -EINVAL) {
> > > +             return default_mode;
> > > +     }
> > 
> > I don't think you understood my comment about of_property_read_u8()
> > not modifying &led_mode on error. Please read the comment again, and
> > simplify this.
> > 
> 
> If i understand your comment correctly

Nope, you don't.

     rc = of_property_read_u8(of_node, led, &led_mode);

If rc indicates an error, led_mode is not touched. Read the
documentation for this function. So you can simplifiy the code:

	led_mode = default_mode;
	err = of_property_read_u8(of_node, led, &led_mode);
	if (!err && (led_mode > 15 || led_mode == 7) | (led_mode == 11) {
             phydev_err(phydev, "DT %s invalid\n", led);
             return -EINVAL;
	}
	return led_mode;

	Andrew
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Re: [PATCH v2 net-next] net: phy: Add LED mode driver for Microsemi PHYs.

[Rob Herring]

On Wed, Feb 01, 2017 at 06:23:46PM +0530, Raju Lakkaraju wrote:
> From: Raju Lakkaraju <Raju.Lakkaraju-dzo6w/eZyo2tG0bUXCXiUA@public.gmane.org>
> 
> 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 (vsc8531, led-0-mode) and (vsc8531, led-1-mode) get
> from Device Tree.
> 
> Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju-dzo6w/eZyo2tG0bUXCXiUA@public.gmane.org>
> ---
>  .../devicetree/bindings/net/mscc-phy-vsc8531.txt   | 10 +++
>  drivers/net/phy/mscc.c                             | 85 +++++++++++++++++++++-
>  include/dt-bindings/net/mscc-phy-vsc8531.h         | 29 ++++++++
>  3 files changed, 123 insertions(+), 1 deletion(-)
>  create mode 100644 include/dt-bindings/net/mscc-phy-vsc8531.h
> 
> diff --git a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
> index bdefefc6..bb7450c 100644
> --- a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
> +++ b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
> @@ -27,6 +27,14 @@ 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.

vsc8531 is not a vendor prefix. I see other properties did this, but 
please don't continue it.

> +			  Allowed values are define in
> +			  "include/dt-bindings/net/mscc-phy-vsc8531.h".
> +			  Default value is 1.
> +- vsc8531,led-1-mode	: LED mode. Specify how the LED[1] should behave.

Why not make this an array for LED0 and LED1?

> +			  Allowed values are define in
> +			  "include/dt-bindings/net/mscc-phy-vsc8531.h".
> +			  Default value is 2.
>  
>  Table: 1 - Edge rate change
>  ----------------------------------------------------------------|
> @@ -60,4 +68,6 @@ Example:
>                  compatible = "ethernet-phy-id0007.0570";
>                  vsc8531,vddmac		= <3300>;
>                  vsc8531,edge-slowdown	= <7>;
> +                vsc8531,led-0-mode	= <LINK_1000_ACTIVITY>;
> +                vsc8531,led-1-mode	= <LINK_100_ACTIVITY>;
>          };
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Re: [PATCH v2 net-next] net: phy: Add LED mode driver for Microsemi

[Florian Fainelli]

On 02/01/2017 04:53 AM, Raju Lakkaraju wrote:
> From: Raju Lakkaraju <Raju.Lakkaraju@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.

Why is this LED selection done through Device Tree/initial configuration
instead of coming up with a proper LED device registered by the PHY
which allows you to select exactly how you want the modes to wind-up
looking like?

NB: you don't need a cover letter for single patches.

> 
> LED Mode parameter (vsc8531, led-0-mode) and (vsc8531, led-1-mode) get from
> Device Tree.
> 
> Tested on Beaglebone Black with VSC 8531 PHY.
> 
> Change set:
> v0:
> - Initial version of LED driver for Microsemi PHYs.
> v1:
> - Update all review comments given by Andrew.
> - Add new header file "mscc-phy-vsc8531.h" to define DT macros.
> - Add error/range check for DT LED mode input
> v2:
> - Fixed x86_64 build error.
> 
> Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microsemi.com>
> 
> 
> Raju Lakkaraju (1):
>   net: phy: Add LED mode driver for Microsemi PHYs.
> 
>  .../devicetree/bindings/net/mscc-phy-vsc8531.txt   | 10 +++
>  drivers/net/phy/mscc.c                             | 85 +++++++++++++++++++++-
>  include/dt-bindings/net/mscc-phy-vsc8531.h         | 29 ++++++++
>  3 files changed, 123 insertions(+), 1 deletion(-)
>  create mode 100644 include/dt-bindings/net/mscc-phy-vsc8531.h
> 


-- 
Florian

Re: [PATCH v2 net-next] net: phy: Add LED mode driver for Microsemi

[Raju Lakkaraju]

Hi Florian,

Thank you for review comments.

On Wed, Feb 01, 2017 at 10:04:08AM -0800, Florian Fainelli wrote:
> EXTERNAL EMAIL
> 
> 
> On 02/01/2017 04:53 AM, Raju Lakkaraju wrote:
> > From: Raju Lakkaraju <Raju.Lakkaraju@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.
> 
> Why is this LED selection done through Device Tree/initial configuration
> instead of coming up with a proper LED device registered by the PHY
> which allows you to select exactly how you want the modes to wind-up
> looking like?
> 

I wrote the LED driver similar to "Micrel". Added only LED mode.

> NB: you don't need a cover letter for single patches.
> 
Accepted. I will do.

> >
> > LED Mode parameter (vsc8531, led-0-mode) and (vsc8531, led-1-mode) get from
> > Device Tree.
> >
> > Tested on Beaglebone Black with VSC 8531 PHY.
> >
> > Change set:
> > v0:
> > - Initial version of LED driver for Microsemi PHYs.
> > v1:
> > - Update all review comments given by Andrew.
> > - Add new header file "mscc-phy-vsc8531.h" to define DT macros.
> > - Add error/range check for DT LED mode input
> > v2:
> > - Fixed x86_64 build error.
> >
> > Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microsemi.com>
> >
> >
> > Raju Lakkaraju (1):
> >   net: phy: Add LED mode driver for Microsemi PHYs.
> >
> >  .../devicetree/bindings/net/mscc-phy-vsc8531.txt   | 10 +++
> >  drivers/net/phy/mscc.c                             | 85 +++++++++++++++++++++-
> >  include/dt-bindings/net/mscc-phy-vsc8531.h         | 29 ++++++++
> >  3 files changed, 123 insertions(+), 1 deletion(-)
> >  create mode 100644 include/dt-bindings/net/mscc-phy-vsc8531.h
> >
> 
> 
> --
> Florian


---
Thanks,
Raju.