* [PATCH net-next v10 0/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs.
@ 2016-10-10 14:13 Allan W. Nielsen
2016-10-10 14:13 ` [PATCH net-next v10 1/1] " Allan W. Nielsen
0 siblings, 1 reply; 9+ messages in thread
From: Allan W. Nielsen @ 2016-10-10 14:13 UTC (permalink / raw)
To: netdev; +Cc: andrew, f.fainelli, raju.lakkaraju, allan.nielsen
Hi All,
Yet another iteration on the edge rate.
Included in this iteration:
- vdd and slowdown is removed from private structure
- rate_magic added to private structure
- devicetree settings is read and validated in probe instead of init
- unused reference in device-tree doc removed
Please review
/Allan
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH net-next v10 1/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs.
2016-10-10 14:13 [PATCH net-next v10 0/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs Allan W. Nielsen
@ 2016-10-10 14:13 ` Allan W. Nielsen
2016-10-11 13:09 ` Andrew Lunn
` (2 more replies)
0 siblings, 3 replies; 9+ messages in thread
From: Allan W. Nielsen @ 2016-10-10 14:13 UTC (permalink / raw)
To: netdev; +Cc: andrew, f.fainelli, raju.lakkaraju, allan.nielsen
Edge-Rate cleanup include the following:
- Updated device tree bindings documentation for edge-rate
- The edge-rate is now specified as a "slowdown", meaning that it is now
being specified as positive values instead of negative (both
documentation and implementation wise).
- Only explicitly documented values for "vsc8531,vddmac" and
"vsc8531,edge-slowdown" are accepted by the device driver.
- Deleted include/dt-bindings/net/mscc-phy-vsc8531.h as it was not needed.
- Read/validate devicetree settings in probe instead of init
Signed-off-by: Allan W. Nielsen <allan.nielsen@microsemi.com>
Signed-off-by: Raju Lakkaraju <raju.lakkaraju@microsemi.com>
---
.../devicetree/bindings/net/mscc-phy-vsc8531.txt | 51 +++++----
drivers/net/phy/mscc.c | 127 ++++++++++-----------
include/dt-bindings/net/mscc-phy-vsc8531.h | 21 ----
3 files changed, 86 insertions(+), 113 deletions(-)
delete 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 99c7eb0..bdefefc6 100644
--- a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
+++ b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
@@ -6,22 +6,27 @@ Required properties:
Documentation/devicetree/bindings/net/phy.txt
Optional properties:
-- vsc8531,vddmac : The vddmac in mV.
+- vsc8531,vddmac : The vddmac in mV. Allowed values is listed
+ in the first row of Table 1 (below).
+ This property is only used in combination
+ with the 'edge-slowdown' property.
+ Default value is 3300.
- vsc8531,edge-slowdown : % the edge should be slowed down relative to
- the fastest possible edge time. Native sign
- need not enter.
+ the fastest possible edge time.
Edge rate sets the drive strength of the MAC
- interface output signals. Changing the drive
- strength will affect the edge rate of the output
- signal. The goal of this setting is to help
- reduce electrical emission (EMI) by being able
- to reprogram drive strength and in effect slow
- down the edge rate if desired. Table 1 shows the
- impact to the edge rate per VDDMAC supply for each
- drive strength setting.
- Ref: Table:1 - Edge rate change below.
-
-Note: see dt-bindings/net/mscc-phy-vsc8531.h for applicable values
+ interface output signals. Changing the
+ drive strength will affect the edge rate of
+ the output signal. The goal of this setting
+ is to help reduce electrical emission (EMI)
+ by being able to reprogram drive strength
+ and in effect slow down the edge rate if
+ desired.
+ To adjust the edge-slowdown, the 'vddmac'
+ must be specified. Table 1 lists the
+ supported edge-slowdown values for a given
+ 'vddmac'.
+ Default value is 0%.
+ Ref: Table:1 - Edge rate change (below).
Table: 1 - Edge rate change
----------------------------------------------------------------|
@@ -29,23 +34,23 @@ Table: 1 - Edge rate change
| |
| 3300 mV 2500 mV 1800 mV 1500 mV |
|---------------------------------------------------------------|
-| Default Deafult Default Default |
+| 0% 0% 0% 0% |
| (Fastest) (recommended) (recommended) |
|---------------------------------------------------------------|
-| -2% -3% -5% -6% |
+| 2% 3% 5% 6% |
|---------------------------------------------------------------|
-| -4% -6% -9% -14% |
+| 4% 6% 9% 14% |
|---------------------------------------------------------------|
-| -7% -10% -16% -21% |
+| 7% 10% 16% 21% |
|(recommended) (recommended) |
|---------------------------------------------------------------|
-| -10% -14% -23% -29% |
+| 10% 14% 23% 29% |
|---------------------------------------------------------------|
-| -17% -23% -35% -42% |
+| 17% 23% 35% 42% |
|---------------------------------------------------------------|
-| -29% -37% -52% -58% |
+| 29% 37% 52% 58% |
|---------------------------------------------------------------|
-| -53% -63% -76% -77% |
+| 53% 63% 76% 77% |
| (slowest) |
|---------------------------------------------------------------|
@@ -54,5 +59,5 @@ Example:
vsc8531_0: ethernet-phy@0 {
compatible = "ethernet-phy-id0007.0570";
vsc8531,vddmac = <3300>;
- vsc8531,edge-slowdown = <21>;
+ vsc8531,edge-slowdown = <7>;
};
diff --git a/drivers/net/phy/mscc.c b/drivers/net/phy/mscc.c
index a17573e..405ab0e 100644
--- a/drivers/net/phy/mscc.c
+++ b/drivers/net/phy/mscc.c
@@ -12,7 +12,6 @@
#include <linux/mii.h>
#include <linux/phy.h>
#include <linux/of.h>
-#include <dt-bindings/net/mscc-phy-vsc8531.h>
enum rgmii_rx_clock_delay {
RGMII_RX_CLK_DELAY_0_2_NS = 0,
@@ -56,23 +55,29 @@ enum rgmii_rx_clock_delay {
#define PHY_ID_VSC8531 0x00070570
#define PHY_ID_VSC8541 0x00070770
-struct edge_rate_table {
- u16 vddmac;
- int slowdown[MSCC_SLOWDOWN_MAX];
-};
+#define MSCC_VDDMAC_1500 1500
+#define MSCC_VDDMAC_1800 1800
+#define MSCC_VDDMAC_2500 2500
+#define MSCC_VDDMAC_3300 3300
-struct edge_rate_table edge_table[MSCC_VDDMAC_MAX] = {
- {3300, { 0, -2, -4, -7, -10, -17, -29, -53} },
- {2500, { 0, -3, -6, -10, -14, -23, -37, -63} },
- {1800, { 0, -5, -9, -16, -23, -35, -52, -76} },
- {1500, { 0, -6, -14, -21, -29, -42, -58, -77} },
+struct vsc8531_private {
+ int rate_magic;
};
-struct vsc8531_private {
- u8 edge_slowdown;
+#ifdef CONFIG_OF_MDIO
+struct vsc8531_edge_rate_table {
u16 vddmac;
+ u8 slowdown[8];
};
+static const struct vsc8531_edge_rate_table edge_table[] = {
+ {MSCC_VDDMAC_3300, { 0, 2, 4, 7, 10, 17, 29, 53} },
+ {MSCC_VDDMAC_2500, { 0, 3, 6, 10, 14, 23, 37, 63} },
+ {MSCC_VDDMAC_1800, { 0, 5, 9, 16, 23, 35, 52, 76} },
+ {MSCC_VDDMAC_1500, { 0, 6, 14, 21, 29, 42, 58, 77} },
+};
+#endif /* CONFIG_OF_MDIO */
+
static int vsc85xx_phy_page_set(struct phy_device *phydev, u8 page)
{
int rc;
@@ -81,29 +86,43 @@ static int vsc85xx_phy_page_set(struct phy_device *phydev, u8 page)
return rc;
}
-static u8 edge_rate_magic_get(u16 vddmac,
- int slowdown)
+#ifdef CONFIG_OF_MDIO
+static int vsc85xx_edge_rate_magic_get(struct phy_device *phydev)
{
- int rc = (MSCC_SLOWDOWN_MAX - 1);
- u8 vdd;
u8 sd;
+ u16 vdd;
+ int rc, i, j;
+ struct device *dev = &phydev->mdio.dev;
+ struct device_node *of_node = dev->of_node;
+ u8 sd_array_size = ARRAY_SIZE(edge_table[0].slowdown);
- for (vdd = 0; vdd < MSCC_VDDMAC_MAX; vdd++) {
- if (edge_table[vdd].vddmac == vddmac) {
- for (sd = 0; sd < MSCC_SLOWDOWN_MAX; sd++) {
- if (edge_table[vdd].slowdown[sd] <= slowdown) {
- rc = (MSCC_SLOWDOWN_MAX - sd - 1);
- break;
- }
- }
- }
- }
+ if (!of_node)
+ return -ENODEV;
- return rc;
+ rc = of_property_read_u16(of_node, "vsc8531,vddmac", &vdd);
+ if (rc != 0)
+ vdd = MSCC_VDDMAC_3300;
+
+ rc = of_property_read_u8(of_node, "vsc8531,edge-slowdown", &sd);
+ if (rc != 0)
+ sd = 0;
+
+ for (i = 0; i < ARRAY_SIZE(edge_table); i++)
+ if (edge_table[i].vddmac == vdd)
+ for (j = 0; j < sd_array_size; j++)
+ if (edge_table[i].slowdown[j] == sd)
+ return (sd_array_size - j - 1);
+
+ return -EINVAL;
+}
+#else
+static int vsc85xx_edge_rate_magic_get(struct phy_device *phydev)
+{
+ return 0;
}
+#endif /* CONFIG_OF_MDIO */
-static int vsc85xx_edge_rate_cntl_set(struct phy_device *phydev,
- u8 edge_rate)
+static int vsc85xx_edge_rate_cntl_set(struct phy_device *phydev, u8 edge_rate)
{
int rc;
u16 reg_val;
@@ -184,45 +203,10 @@ out_unlock:
return rc;
}
-#ifdef CONFIG_OF_MDIO
-static int vsc8531_of_init(struct phy_device *phydev)
-{
- int rc;
- struct vsc8531_private *vsc8531 = phydev->priv;
- struct device *dev = &phydev->mdio.dev;
- struct device_node *of_node = dev->of_node;
-
- if (!of_node)
- return -ENODEV;
-
- rc = of_property_read_u16(of_node, "vsc8531,vddmac",
- &vsc8531->vddmac);
- if (rc == -EINVAL)
- vsc8531->vddmac = MSCC_VDDMAC_3300;
- rc = of_property_read_u8(of_node, "vsc8531,edge-slowdown",
- &vsc8531->edge_slowdown);
- if (rc == -EINVAL)
- vsc8531->edge_slowdown = 0;
-
- rc = 0;
- return rc;
-}
-#else
-static int vsc8531_of_init(struct phy_device *phydev)
-{
- return 0;
-}
-#endif /* CONFIG_OF_MDIO */
-
static int vsc85xx_config_init(struct phy_device *phydev)
{
int rc;
struct vsc8531_private *vsc8531 = phydev->priv;
- u8 edge_rate;
-
- rc = vsc8531_of_init(phydev);
- if (rc)
- return rc;
rc = vsc85xx_default_config(phydev);
if (rc)
@@ -232,9 +216,7 @@ static int vsc85xx_config_init(struct phy_device *phydev)
if (rc)
return rc;
- edge_rate = edge_rate_magic_get(vsc8531->vddmac,
- -(int)vsc8531->edge_slowdown);
- rc = vsc85xx_edge_rate_cntl_set(phydev, edge_rate);
+ rc = vsc85xx_edge_rate_cntl_set(phydev, vsc8531->rate_magic);
if (rc)
return rc;
@@ -272,14 +254,21 @@ static int vsc85xx_config_intr(struct phy_device *phydev)
static int vsc85xx_probe(struct phy_device *phydev)
{
+ int rate_magic;
struct vsc8531_private *vsc8531;
+ rate_magic = vsc85xx_edge_rate_magic_get(phydev);
+ if (rate_magic < 0)
+ return rate_magic;
+
vsc8531 = devm_kzalloc(&phydev->mdio.dev, sizeof(*vsc8531), GFP_KERNEL);
if (!vsc8531)
return -ENOMEM;
phydev->priv = vsc8531;
+ vsc8531->rate_magic = rate_magic;
+
return 0;
}
@@ -300,7 +289,7 @@ static struct phy_driver vsc85xx_driver[] = {
.config_intr = &vsc85xx_config_intr,
.suspend = &genphy_suspend,
.resume = &genphy_resume,
- .probe = &vsc85xx_probe,
+ .probe = &vsc85xx_probe,
},
{
.phy_id = PHY_ID_VSC8541,
@@ -317,7 +306,7 @@ static struct phy_driver vsc85xx_driver[] = {
.config_intr = &vsc85xx_config_intr,
.suspend = &genphy_suspend,
.resume = &genphy_resume,
- .probe = &vsc85xx_probe,
+ .probe = &vsc85xx_probe,
}
};
diff --git a/include/dt-bindings/net/mscc-phy-vsc8531.h b/include/dt-bindings/net/mscc-phy-vsc8531.h
deleted file mode 100644
index 2383dd2..0000000
--- a/include/dt-bindings/net/mscc-phy-vsc8531.h
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * Device Tree constants for Microsemi VSC8531 PHY
- *
- * Author: Nagaraju Lakkaraju
- *
- * License: Dual MIT/GPL
- * Copyright (c) 2016 Microsemi Corporation
- */
-
-#ifndef _DT_BINDINGS_MSCC_VSC8531_H
-#define _DT_BINDINGS_MSCC_VSC8531_H
-
-/* MAC interface Edge rate control VDDMAC in milli Volts */
-#define MSCC_VDDMAC_3300 3300
-#define MSCC_VDDMAC_2500 2500
-#define MSCC_VDDMAC_1800 1800
-#define MSCC_VDDMAC_1500 1500
-#define MSCC_VDDMAC_MAX 4
-#define MSCC_SLOWDOWN_MAX 8
-
-#endif
--
2.7.3
^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [PATCH net-next v10 1/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs.
2016-10-10 14:13 ` [PATCH net-next v10 1/1] " Allan W. Nielsen
@ 2016-10-11 13:09 ` Andrew Lunn
2016-10-12 9:14 ` Florian Fainelli
2016-10-13 14:01 ` David Miller
2 siblings, 0 replies; 9+ messages in thread
From: Andrew Lunn @ 2016-10-11 13:09 UTC (permalink / raw)
To: Allan W. Nielsen; +Cc: netdev, f.fainelli, raju.lakkaraju
On Mon, Oct 10, 2016 at 04:13:45PM +0200, Allan W. Nielsen wrote:
> Edge-Rate cleanup include the following:
> - Updated device tree bindings documentation for edge-rate
> - The edge-rate is now specified as a "slowdown", meaning that it is now
> being specified as positive values instead of negative (both
> documentation and implementation wise).
> - Only explicitly documented values for "vsc8531,vddmac" and
> "vsc8531,edge-slowdown" are accepted by the device driver.
> - Deleted include/dt-bindings/net/mscc-phy-vsc8531.h as it was not needed.
> - Read/validate devicetree settings in probe instead of init
>
> Signed-off-by: Allan W. Nielsen <allan.nielsen@microsemi.com>
> Signed-off-by: Raju Lakkaraju <raju.lakkaraju@microsemi.com>
Hi Raju, Allan
Thanks for keeping at this.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Andrew
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH net-next v10 1/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs.
2016-10-10 14:13 ` [PATCH net-next v10 1/1] " Allan W. Nielsen
2016-10-11 13:09 ` Andrew Lunn
@ 2016-10-12 9:14 ` Florian Fainelli
2016-10-13 14:01 ` David Miller
2 siblings, 0 replies; 9+ messages in thread
From: Florian Fainelli @ 2016-10-12 9:14 UTC (permalink / raw)
To: Allan W. Nielsen, netdev; +Cc: andrew, raju.lakkaraju
On 10/10/2016 07:13 AM, Allan W. Nielsen wrote:
> Edge-Rate cleanup include the following:
> - Updated device tree bindings documentation for edge-rate
> - The edge-rate is now specified as a "slowdown", meaning that it is now
> being specified as positive values instead of negative (both
> documentation and implementation wise).
> - Only explicitly documented values for "vsc8531,vddmac" and
> "vsc8531,edge-slowdown" are accepted by the device driver.
> - Deleted include/dt-bindings/net/mscc-phy-vsc8531.h as it was not needed.
> - Read/validate devicetree settings in probe instead of init
>
> Signed-off-by: Allan W. Nielsen <allan.nielsen@microsemi.com>
> Signed-off-by: Raju Lakkaraju <raju.lakkaraju@microsemi.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
--
Florian
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH net-next v10 1/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs.
2016-10-10 14:13 ` [PATCH net-next v10 1/1] " Allan W. Nielsen
2016-10-11 13:09 ` Andrew Lunn
2016-10-12 9:14 ` Florian Fainelli
@ 2016-10-13 14:01 ` David Miller
2016-10-13 18:21 ` [PATCH net-next v11 0/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs (rebase) Allan W. Nielsen
2 siblings, 1 reply; 9+ messages in thread
From: David Miller @ 2016-10-13 14:01 UTC (permalink / raw)
To: allan.nielsen; +Cc: netdev, andrew, f.fainelli, raju.lakkaraju
From: "Allan W. Nielsen" <allan.nielsen@microsemi.com>
Date: Mon, 10 Oct 2016 16:13:45 +0200
> Edge-Rate cleanup include the following:
> - Updated device tree bindings documentation for edge-rate
> - The edge-rate is now specified as a "slowdown", meaning that it is now
> being specified as positive values instead of negative (both
> documentation and implementation wise).
> - Only explicitly documented values for "vsc8531,vddmac" and
> "vsc8531,edge-slowdown" are accepted by the device driver.
> - Deleted include/dt-bindings/net/mscc-phy-vsc8531.h as it was not needed.
> - Read/validate devicetree settings in probe instead of init
>
> Signed-off-by: Allan W. Nielsen <allan.nielsen@microsemi.com>
> Signed-off-by: Raju Lakkaraju <raju.lakkaraju@microsemi.com>
This doesn't apply cleanly to net-next, please respin.
Thanks.
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH net-next v11 0/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs (rebase)
2016-10-13 14:01 ` David Miller
@ 2016-10-13 18:21 ` Allan W. Nielsen
2016-10-13 18:21 ` [PATCH net-next v11 1/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs Allan W. Nielsen
0 siblings, 1 reply; 9+ messages in thread
From: Allan W. Nielsen @ 2016-10-13 18:21 UTC (permalink / raw)
To: netdev; +Cc: andrew, f.fainelli, raju.lakkaraju, allan.nielsen
Hi,
On 13/10/16 10:01, David Miller wrote:
> This doesn't apply cleanly to net-next, please respin.
Sorry about that... But, I have already send a rebased version (v11) which does
apply cleanly. This time I will try and see if I can get git-send-email to use
the same thread ID.
Anyway, here is a re-post of version 11 (which should apply cleanly on-top of
net-next)
v10 was reviewed by Florian and Andrew:
On 12/10/16 02:14, Florian Fainelli wrote:
> On 10/10/2016 07:13 AM, Allan W. Nielsen wrote:
> > Edge-Rate cleanup include the following:
> > ...
> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
On 11/10/16 15:09, Andrew Lunn wrote:
> On Mon, Oct 10, 2016 at 04:13:45PM +0200, Allan W. Nielsen wrote:
> > Edge-Rate cleanup include the following:
> > ...
> Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Best regards
Allan W. Nielsen
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH net-next v11 1/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs.
2016-10-13 18:21 ` [PATCH net-next v11 0/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs (rebase) Allan W. Nielsen
@ 2016-10-13 18:21 ` Allan W. Nielsen
2016-10-14 15:05 ` David Miller
0 siblings, 1 reply; 9+ messages in thread
From: Allan W. Nielsen @ 2016-10-13 18:21 UTC (permalink / raw)
To: netdev; +Cc: andrew, f.fainelli, raju.lakkaraju, allan.nielsen
Edge-Rate cleanup include the following:
- Updated device tree bindings documentation for edge-rate
- The edge-rate is now specified as a "slowdown", meaning that it is now
being specified as positive values instead of negative (both
documentation and implementation wise).
- Only explicitly documented values for "vsc8531,vddmac" and
"vsc8531,edge-slowdown" are accepted by the device driver.
- Deleted include/dt-bindings/net/mscc-phy-vsc8531.h as it was not needed.
- Read/validate devicetree settings in probe instead of init
Signed-off-by: Allan W. Nielsen <allan.nielsen@microsemi.com>
Signed-off-by: Raju Lakkaraju <raju.lakkaraju@microsemi.com>
---
.../devicetree/bindings/net/mscc-phy-vsc8531.txt | 51 ++++----
drivers/net/phy/mscc.c | 135 ++++++++++-----------
include/dt-bindings/net/mscc-phy-vsc8531.h | 21 ----
3 files changed, 90 insertions(+), 117 deletions(-)
delete 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 99c7eb0..bdefefc6 100644
--- a/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
+++ b/Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt
@@ -6,22 +6,27 @@ Required properties:
Documentation/devicetree/bindings/net/phy.txt
Optional properties:
-- vsc8531,vddmac : The vddmac in mV.
+- vsc8531,vddmac : The vddmac in mV. Allowed values is listed
+ in the first row of Table 1 (below).
+ This property is only used in combination
+ with the 'edge-slowdown' property.
+ Default value is 3300.
- vsc8531,edge-slowdown : % the edge should be slowed down relative to
- the fastest possible edge time. Native sign
- need not enter.
+ the fastest possible edge time.
Edge rate sets the drive strength of the MAC
- interface output signals. Changing the drive
- strength will affect the edge rate of the output
- signal. The goal of this setting is to help
- reduce electrical emission (EMI) by being able
- to reprogram drive strength and in effect slow
- down the edge rate if desired. Table 1 shows the
- impact to the edge rate per VDDMAC supply for each
- drive strength setting.
- Ref: Table:1 - Edge rate change below.
-
-Note: see dt-bindings/net/mscc-phy-vsc8531.h for applicable values
+ interface output signals. Changing the
+ drive strength will affect the edge rate of
+ the output signal. The goal of this setting
+ is to help reduce electrical emission (EMI)
+ by being able to reprogram drive strength
+ and in effect slow down the edge rate if
+ desired.
+ To adjust the edge-slowdown, the 'vddmac'
+ must be specified. Table 1 lists the
+ supported edge-slowdown values for a given
+ 'vddmac'.
+ Default value is 0%.
+ Ref: Table:1 - Edge rate change (below).
Table: 1 - Edge rate change
----------------------------------------------------------------|
@@ -29,23 +34,23 @@ Table: 1 - Edge rate change
| |
| 3300 mV 2500 mV 1800 mV 1500 mV |
|---------------------------------------------------------------|
-| Default Deafult Default Default |
+| 0% 0% 0% 0% |
| (Fastest) (recommended) (recommended) |
|---------------------------------------------------------------|
-| -2% -3% -5% -6% |
+| 2% 3% 5% 6% |
|---------------------------------------------------------------|
-| -4% -6% -9% -14% |
+| 4% 6% 9% 14% |
|---------------------------------------------------------------|
-| -7% -10% -16% -21% |
+| 7% 10% 16% 21% |
|(recommended) (recommended) |
|---------------------------------------------------------------|
-| -10% -14% -23% -29% |
+| 10% 14% 23% 29% |
|---------------------------------------------------------------|
-| -17% -23% -35% -42% |
+| 17% 23% 35% 42% |
|---------------------------------------------------------------|
-| -29% -37% -52% -58% |
+| 29% 37% 52% 58% |
|---------------------------------------------------------------|
-| -53% -63% -76% -77% |
+| 53% 63% 76% 77% |
| (slowest) |
|---------------------------------------------------------------|
@@ -54,5 +59,5 @@ Example:
vsc8531_0: ethernet-phy@0 {
compatible = "ethernet-phy-id0007.0570";
vsc8531,vddmac = <3300>;
- vsc8531,edge-slowdown = <21>;
+ vsc8531,edge-slowdown = <7>;
};
diff --git a/drivers/net/phy/mscc.c b/drivers/net/phy/mscc.c
index 77a6671..113616b 100644
--- a/drivers/net/phy/mscc.c
+++ b/drivers/net/phy/mscc.c
@@ -12,7 +12,6 @@
#include <linux/mii.h>
#include <linux/phy.h>
#include <linux/of.h>
-#include <dt-bindings/net/mscc-phy-vsc8531.h>
#include <linux/netdevice.h>
enum rgmii_rx_clock_delay {
@@ -69,23 +68,29 @@ enum rgmii_rx_clock_delay {
#define PHY_ID_VSC8531 0x00070570
#define PHY_ID_VSC8541 0x00070770
-struct edge_rate_table {
- u16 vddmac;
- int slowdown[MSCC_SLOWDOWN_MAX];
-};
+#define MSCC_VDDMAC_1500 1500
+#define MSCC_VDDMAC_1800 1800
+#define MSCC_VDDMAC_2500 2500
+#define MSCC_VDDMAC_3300 3300
-struct edge_rate_table edge_table[MSCC_VDDMAC_MAX] = {
- {3300, { 0, -2, -4, -7, -10, -17, -29, -53} },
- {2500, { 0, -3, -6, -10, -14, -23, -37, -63} },
- {1800, { 0, -5, -9, -16, -23, -35, -52, -76} },
- {1500, { 0, -6, -14, -21, -29, -42, -58, -77} },
+struct vsc8531_private {
+ int rate_magic;
};
-struct vsc8531_private {
- u8 edge_slowdown;
+#ifdef CONFIG_OF_MDIO
+struct vsc8531_edge_rate_table {
u16 vddmac;
+ u8 slowdown[8];
};
+static const struct vsc8531_edge_rate_table edge_table[] = {
+ {MSCC_VDDMAC_3300, { 0, 2, 4, 7, 10, 17, 29, 53} },
+ {MSCC_VDDMAC_2500, { 0, 3, 6, 10, 14, 23, 37, 63} },
+ {MSCC_VDDMAC_1800, { 0, 5, 9, 16, 23, 35, 52, 76} },
+ {MSCC_VDDMAC_1500, { 0, 6, 14, 21, 29, 42, 58, 77} },
+};
+#endif /* CONFIG_OF_MDIO */
+
static int vsc85xx_phy_page_set(struct phy_device *phydev, u8 page)
{
int rc;
@@ -205,29 +210,43 @@ static void vsc85xx_wol_get(struct phy_device *phydev,
mutex_unlock(&phydev->lock);
}
-static u8 edge_rate_magic_get(u16 vddmac,
- int slowdown)
+#ifdef CONFIG_OF_MDIO
+static int vsc85xx_edge_rate_magic_get(struct phy_device *phydev)
{
- int rc = (MSCC_SLOWDOWN_MAX - 1);
- u8 vdd;
u8 sd;
+ u16 vdd;
+ int rc, i, j;
+ struct device *dev = &phydev->mdio.dev;
+ struct device_node *of_node = dev->of_node;
+ u8 sd_array_size = ARRAY_SIZE(edge_table[0].slowdown);
- for (vdd = 0; vdd < MSCC_VDDMAC_MAX; vdd++) {
- if (edge_table[vdd].vddmac == vddmac) {
- for (sd = 0; sd < MSCC_SLOWDOWN_MAX; sd++) {
- if (edge_table[vdd].slowdown[sd] <= slowdown) {
- rc = (MSCC_SLOWDOWN_MAX - sd - 1);
- break;
- }
- }
- }
- }
+ if (!of_node)
+ return -ENODEV;
- return rc;
+ rc = of_property_read_u16(of_node, "vsc8531,vddmac", &vdd);
+ if (rc != 0)
+ vdd = MSCC_VDDMAC_3300;
+
+ rc = of_property_read_u8(of_node, "vsc8531,edge-slowdown", &sd);
+ if (rc != 0)
+ sd = 0;
+
+ for (i = 0; i < ARRAY_SIZE(edge_table); i++)
+ if (edge_table[i].vddmac == vdd)
+ for (j = 0; j < sd_array_size; j++)
+ if (edge_table[i].slowdown[j] == sd)
+ return (sd_array_size - j - 1);
+
+ return -EINVAL;
+}
+#else
+static int vsc85xx_edge_rate_magic_get(struct phy_device *phydev)
+{
+ return 0;
}
+#endif /* CONFIG_OF_MDIO */
-static int vsc85xx_edge_rate_cntl_set(struct phy_device *phydev,
- u8 edge_rate)
+static int vsc85xx_edge_rate_cntl_set(struct phy_device *phydev, u8 edge_rate)
{
int rc;
u16 reg_val;
@@ -308,45 +327,10 @@ static int vsc85xx_default_config(struct phy_device *phydev)
return rc;
}
-#ifdef CONFIG_OF_MDIO
-static int vsc8531_of_init(struct phy_device *phydev)
-{
- int rc;
- struct vsc8531_private *vsc8531 = phydev->priv;
- struct device *dev = &phydev->mdio.dev;
- struct device_node *of_node = dev->of_node;
-
- if (!of_node)
- return -ENODEV;
-
- rc = of_property_read_u16(of_node, "vsc8531,vddmac",
- &vsc8531->vddmac);
- if (rc == -EINVAL)
- vsc8531->vddmac = MSCC_VDDMAC_3300;
- rc = of_property_read_u8(of_node, "vsc8531,edge-slowdown",
- &vsc8531->edge_slowdown);
- if (rc == -EINVAL)
- vsc8531->edge_slowdown = 0;
-
- rc = 0;
- return rc;
-}
-#else
-static int vsc8531_of_init(struct phy_device *phydev)
-{
- return 0;
-}
-#endif /* CONFIG_OF_MDIO */
-
static int vsc85xx_config_init(struct phy_device *phydev)
{
int rc;
struct vsc8531_private *vsc8531 = phydev->priv;
- u8 edge_rate;
-
- rc = vsc8531_of_init(phydev);
- if (rc)
- return rc;
rc = vsc85xx_default_config(phydev);
if (rc)
@@ -356,9 +340,7 @@ static int vsc85xx_config_init(struct phy_device *phydev)
if (rc)
return rc;
- edge_rate = edge_rate_magic_get(vsc8531->vddmac,
- -(int)vsc8531->edge_slowdown);
- rc = vsc85xx_edge_rate_cntl_set(phydev, edge_rate);
+ rc = vsc85xx_edge_rate_cntl_set(phydev, vsc8531->rate_magic);
if (rc)
return rc;
@@ -396,14 +378,21 @@ static int vsc85xx_config_intr(struct phy_device *phydev)
static int vsc85xx_probe(struct phy_device *phydev)
{
+ int rate_magic;
struct vsc8531_private *vsc8531;
+ rate_magic = vsc85xx_edge_rate_magic_get(phydev);
+ if (rate_magic < 0)
+ return rate_magic;
+
vsc8531 = devm_kzalloc(&phydev->mdio.dev, sizeof(*vsc8531), GFP_KERNEL);
if (!vsc8531)
return -ENOMEM;
phydev->priv = vsc8531;
+ vsc8531->rate_magic = rate_magic;
+
return 0;
}
@@ -424,9 +413,9 @@ static struct phy_driver vsc85xx_driver[] = {
.config_intr = &vsc85xx_config_intr,
.suspend = &genphy_suspend,
.resume = &genphy_resume,
- .probe = &vsc85xx_probe,
- .set_wol = &vsc85xx_wol_set,
- .get_wol = &vsc85xx_wol_get,
+ .probe = &vsc85xx_probe,
+ .set_wol = &vsc85xx_wol_set,
+ .get_wol = &vsc85xx_wol_get,
},
{
.phy_id = PHY_ID_VSC8541,
@@ -443,9 +432,9 @@ static struct phy_driver vsc85xx_driver[] = {
.config_intr = &vsc85xx_config_intr,
.suspend = &genphy_suspend,
.resume = &genphy_resume,
- .probe = &vsc85xx_probe,
- .set_wol = &vsc85xx_wol_set,
- .get_wol = &vsc85xx_wol_get,
+ .probe = &vsc85xx_probe,
+ .set_wol = &vsc85xx_wol_set,
+ .get_wol = &vsc85xx_wol_get,
}
};
diff --git a/include/dt-bindings/net/mscc-phy-vsc8531.h b/include/dt-bindings/net/mscc-phy-vsc8531.h
deleted file mode 100644
index 2383dd2..0000000
--- a/include/dt-bindings/net/mscc-phy-vsc8531.h
+++ /dev/null
@@ -1,21 +0,0 @@
-/*
- * Device Tree constants for Microsemi VSC8531 PHY
- *
- * Author: Nagaraju Lakkaraju
- *
- * License: Dual MIT/GPL
- * Copyright (c) 2016 Microsemi Corporation
- */
-
-#ifndef _DT_BINDINGS_MSCC_VSC8531_H
-#define _DT_BINDINGS_MSCC_VSC8531_H
-
-/* MAC interface Edge rate control VDDMAC in milli Volts */
-#define MSCC_VDDMAC_3300 3300
-#define MSCC_VDDMAC_2500 2500
-#define MSCC_VDDMAC_1800 1800
-#define MSCC_VDDMAC_1500 1500
-#define MSCC_VDDMAC_MAX 4
-#define MSCC_SLOWDOWN_MAX 8
-
-#endif
--
2.7.3
^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [PATCH net-next v11 1/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs.
2016-10-13 18:21 ` [PATCH net-next v11 1/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs Allan W. Nielsen
@ 2016-10-14 15:05 ` David Miller
2016-10-14 18:48 ` Allan W. Nielsen
0 siblings, 1 reply; 9+ messages in thread
From: David Miller @ 2016-10-14 15:05 UTC (permalink / raw)
To: allan.nielsen; +Cc: netdev, andrew, f.fainelli, raju.lakkaraju
From: "Allan W. Nielsen" <allan.nielsen@microsemi.com>
Date: Thu, 13 Oct 2016 20:21:30 +0200
> Edge-Rate cleanup include the following:
> - Updated device tree bindings documentation for edge-rate
> - The edge-rate is now specified as a "slowdown", meaning that it is now
> being specified as positive values instead of negative (both
> documentation and implementation wise).
> - Only explicitly documented values for "vsc8531,vddmac" and
> "vsc8531,edge-slowdown" are accepted by the device driver.
> - Deleted include/dt-bindings/net/mscc-phy-vsc8531.h as it was not needed.
> - Read/validate devicetree settings in probe instead of init
>
> Signed-off-by: Allan W. Nielsen <allan.nielsen@microsemi.com>
> Signed-off-by: Raju Lakkaraju <raju.lakkaraju@microsemi.com>
This patch does not apply to the net-next tree.
Take my tree, put this email of your's into a file, and run this:
bash$ git am file
and you will get:
[davem@dhcp-10-15-49-210 net-next]$ git am --signoff net-next-v11-1-1-net-phy-Cleanup-the-Edge-Rate-feature-in-Microsemi-PHYs..patch
Applying: net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs.
error: patch failed: Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt:6
error: Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt: patch does not apply
error: patch failed: drivers/net/phy/mscc.c:12
error: drivers/net/phy/mscc.c: patch does not apply
error: include/dt-bindings/net/mscc-phy-vsc8531.h: does not exist in index
Patch failed at 0001 net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs.
The copy of the patch that failed is found in:
/home/davem/src/GIT/net-next/.git/rebase-apply/patch
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".
Please do not resubmit this patch until you can successfully email the
patch to yourself and apply it cleanly to the net-next tree.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH net-next v11 1/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs.
2016-10-14 15:05 ` David Miller
@ 2016-10-14 18:48 ` Allan W. Nielsen
0 siblings, 0 replies; 9+ messages in thread
From: Allan W. Nielsen @ 2016-10-14 18:48 UTC (permalink / raw)
To: David Miller; +Cc: netdev, andrew, f.fainelli, raju.lakkaraju
Hi David,
I'm really sorry if I messed up, or is not following the protocol...
But you have applied it already:
http://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git/commit/?id=4f58e6dceb0e44ca8f21568ed81e1df24e55964c
> commit 4f58e6dceb0e44ca8f21568ed81e1df24e55964c
> Author: Allan W. Nielsen <allan.nielsen@microsemi.com>
> AuthorDate: Wed Oct 12 15:47:51 2016 +0200
> Commit: David S. Miller <davem@davemloft.net>
> CommitDate: Fri Oct 14 10:06:13 2016 -0400
>
> net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs.
>
> Edge-Rate cleanup include the following:
> - Updated device tree bindings documentation for edge-rate
> - The edge-rate is now specified as a "slowdown", meaning that it is now
> being specified as positive values instead of negative (both
> documentation and implementation wise).
> - Only explicitly documented values for "vsc8531,vddmac" and
> "vsc8531,edge-slowdown" are accepted by the device driver.
> - Deleted include/dt-bindings/net/mscc-phy-vsc8531.h as it was not needed.
> - Read/validate devicetree settings in probe instead of init
>
> Signed-off-by: Allan W. Nielsen <allan.nielsen@microsemi.com>
> Signed-off-by: Raju Lakkaraju <raju.lakkaraju@microsemi.com>
> Signed-off-by: David S. Miller <davem@davemloft.net>
Maybe the misunderstanding was caused by me posting the re-based version in
another thread.
Anyway, thanks a lot for the big effort you put into maintaining this
sub-system. I will be more care full next time to avoid such confusions.
Best regards
Allan W. Nielsen
On 14/10/16 11:05, David Miller wrote:
> EXTERNAL EMAIL
>
>
> From: "Allan W. Nielsen" <allan.nielsen@microsemi.com>
> Date: Thu, 13 Oct 2016 20:21:30 +0200
>
> > Edge-Rate cleanup include the following:
> > - Updated device tree bindings documentation for edge-rate
> > - The edge-rate is now specified as a "slowdown", meaning that it is now
> > being specified as positive values instead of negative (both
> > documentation and implementation wise).
> > - Only explicitly documented values for "vsc8531,vddmac" and
> > "vsc8531,edge-slowdown" are accepted by the device driver.
> > - Deleted include/dt-bindings/net/mscc-phy-vsc8531.h as it was not needed.
> > - Read/validate devicetree settings in probe instead of init
> >
> > Signed-off-by: Allan W. Nielsen <allan.nielsen@microsemi.com>
> > Signed-off-by: Raju Lakkaraju <raju.lakkaraju@microsemi.com>
>
> This patch does not apply to the net-next tree.
>
> Take my tree, put this email of your's into a file, and run this:
>
> bash$ git am file
>
> and you will get:
>
> [davem@dhcp-10-15-49-210 net-next]$ git am --signoff net-next-v11-1-1-net-phy-Cleanup-the-Edge-Rate-feature-in-Microsemi-PHYs..patch
> Applying: net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs.
> error: patch failed: Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt:6
> error: Documentation/devicetree/bindings/net/mscc-phy-vsc8531.txt: patch does not apply
> error: patch failed: drivers/net/phy/mscc.c:12
> error: drivers/net/phy/mscc.c: patch does not apply
> error: include/dt-bindings/net/mscc-phy-vsc8531.h: does not exist in index
> Patch failed at 0001 net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs.
> The copy of the patch that failed is found in:
> /home/davem/src/GIT/net-next/.git/rebase-apply/patch
> When you have resolved this problem, run "git am --continue".
> If you prefer to skip this patch, run "git am --skip" instead.
> To restore the original branch and stop patching, run "git am --abort".
>
> Please do not resubmit this patch until you can successfully email the
> patch to yourself and apply it cleanly to the net-next tree.
>
>
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2016-10-14 18:49 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-10-10 14:13 [PATCH net-next v10 0/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs Allan W. Nielsen
2016-10-10 14:13 ` [PATCH net-next v10 1/1] " Allan W. Nielsen
2016-10-11 13:09 ` Andrew Lunn
2016-10-12 9:14 ` Florian Fainelli
2016-10-13 14:01 ` David Miller
2016-10-13 18:21 ` [PATCH net-next v11 0/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs (rebase) Allan W. Nielsen
2016-10-13 18:21 ` [PATCH net-next v11 1/1] net: phy: Cleanup the Edge-Rate feature in Microsemi PHYs Allan W. Nielsen
2016-10-14 15:05 ` David Miller
2016-10-14 18:48 ` Allan W. Nielsen
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