[PATCH v2 0/5] stmmac: Fixed Phy & PTP fixes

[PATCH v2 0/5] stmmac: Fixed Phy & PTP fixes

[Phil Reid]

Provide ability to specify a fixed phy in the device tree and
retain the mdio bus if no phy is found. This is needed where 
a dsa is connected via a fixed phy and uses the mdio bus for config.
Fixed ptp ref clock calculatins for the stmmac when ptp ref clock
is running at <= 50Mhz. Also add device tree setting to config
ptp clk source on socfpga platforms.

Changes from V1:
- Fixed mismatch doc / code for ptp_ref_clk dt node. 
- Remove unit address from doc example.

Phil Reid (5):
  stmmac: create of compatible mdio bus for stmacc driver
  stmmac: Correct documentation on stmmac clocks.
  stmmac: Fix calculations for ptp counters when clock input = 50Mhz.
  stmmac: Add ptp debugfs entry.
  stmmac: socfpga: Provide dt node to config ptp clk source.

 .../devicetree/bindings/net/socfpga-dwmac.txt      |  2 +
 Documentation/devicetree/bindings/net/stmmac.txt   | 27 +++++---
 drivers/net/ethernet/stmicro/stmmac/common.h       |  2 +-
 .../net/ethernet/stmicro/stmmac/dwmac-socfpga.c    |  9 +++
 drivers/net/ethernet/stmicro/stmmac/stmmac.h       |  1 +
 .../net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c  |  8 ++-
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c  | 79 +++++++++++++++++++---
 drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c  | 32 ++++++---
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |  2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.h   |  5 ++
 10 files changed, 133 insertions(+), 34 deletions(-)

-- 
1.8.3.1

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[PATCH v2 1/5] stmmac: create of compatible mdio bus for stmacc driver

[Phil Reid]

The DSA driver needs to be passed a reference to an mdio bus. Typically
the mac is configured to use a fixed link but the mdio bus still needs
to be registered so that it con configure the switch.
This patch follows the same process as the altera tse ethernet driver for
creation of the mdio bus.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Phil Reid <preid@electromag.com.au>
---
 Documentation/devicetree/bindings/net/stmmac.txt   | 10 ++++++-
 drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c  | 32 ++++++++++++++++------
 .../net/ethernet/stmicro/stmmac/stmmac_platform.c  |  2 +-
 3 files changed, 34 insertions(+), 10 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/stmmac.txt b/Documentation/devicetree/bindings/net/stmmac.txt
index f34fc3c..cb6288e 100644
--- a/Documentation/devicetree/bindings/net/stmmac.txt
+++ b/Documentation/devicetree/bindings/net/stmmac.txt
@@ -47,7 +47,8 @@ Optional properties:
 - snps,burst_len: The AXI burst lenth value of the AXI BUS MODE register.
 - tx-fifo-depth: See ethernet.txt file in the same directory
 - rx-fifo-depth: See ethernet.txt file in the same directory
-
+- mdio: with compatible = "snps,dwmac-mdio", create and register mdio bus.
+  
 Examples:
 
 	gmac0: ethernet@e0800000 {
@@ -65,4 +66,11 @@ Examples:
 		tx-fifo-depth = <16384>;
 		clocks = <&clock>;
 		clock-names = "stmmaceth";
+		mdio0 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "snps,dwmac-mdio";
+			phy1: ethernet-phy@0 {
+			};
+		};    
 	};
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
index bba670c..1d972e3 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
@@ -29,7 +29,7 @@
 #include <linux/slab.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
-
+#include <linux/of_mdio.h>
 #include <asm/io.h>
 
 #include "stmmac.h"
@@ -201,6 +201,25 @@ int stmmac_mdio_register(struct net_device *ndev)
 	struct stmmac_mdio_bus_data *mdio_bus_data = priv->plat->mdio_bus_data;
 	int addr, found;
 
+#ifdef CONFIG_OF
+	struct device_node *mdio_node = NULL;
+	struct device_node *child_node = NULL;
+
+	for_each_child_of_node(priv->device->of_node, child_node) {
+		if (of_device_is_compatible(child_node, "snps,dwmac-mdio")) {
+			mdio_node = child_node;
+			break;
+		}
+	}
+
+	if (mdio_node) {
+		netdev_dbg(ndev, "FOUND MDIO subnode\n");
+	} else {
+		netdev_err(ndev, "NO MDIO subnode\n");
+		return 0;
+	}
+#endif
+
 	if (!mdio_bus_data)
 		return 0;
 
@@ -231,7 +250,11 @@ int stmmac_mdio_register(struct net_device *ndev)
 	new_bus->irq = irqlist;
 	new_bus->phy_mask = mdio_bus_data->phy_mask;
 	new_bus->parent = priv->device;
+#ifdef CONFIG_OF
+	err = of_mdiobus_register(new_bus, mdio_node);	
+#else
 	err = mdiobus_register(new_bus);
+#endif
 	if (err != 0) {
 		pr_err("%s: Cannot register as MDIO bus\n", new_bus->name);
 		goto bus_register_fail;
@@ -284,13 +307,6 @@ int stmmac_mdio_register(struct net_device *ndev)
 		}
 	}
 
-	if (!found) {
-		pr_warn("%s: No PHY found\n", ndev->name);
-		mdiobus_unregister(new_bus);
-		mdiobus_free(new_bus);
-		return -ENODEV;
-	}
-
 	priv->mii = new_bus;
 
 	return 0;
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index d02691b..6863420 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -146,7 +146,7 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
 	if (of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr) == 0)
 		dev_warn(&pdev->dev, "snps,phy-addr property is deprecated\n");
 
-	if (plat->phy_node || plat->phy_bus_name)
+	if (plat->phy_bus_name)
 		plat->mdio_bus_data = NULL;
 	else
 		plat->mdio_bus_data =
-- 
1.8.3.1

[PATCH 1/1] stmmac: socfpga: Provide dt node to config ptp clk source.

[Phil Reid]

Signed-off-by: Phil Reid <preid@electromag.com.au>
---
 Documentation/devicetree/bindings/net/socfpga-dwmac.txt |  2 ++
 drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c     | 10 ++++++++++
 2 files changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/socfpga-dwmac.txt b/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
index 3a9d679..72d82d6 100644
--- a/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
+++ b/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
@@ -11,6 +11,8 @@ Required properties:
 		  designware version numbers documented in stmmac.txt
  - altr,sysmgr-syscon : Should be the phandle to the system manager node that
    encompasses the glue register, the register offset, and the register shift.
+ - altr,f2h_ptp_ref_clk use f2h_ptp_ref_clk instead of default eosc1 clock
+   for ptp ref clk. This affects all emacs as the clock is common.
 
 Optional properties:
 altr,emac-splitter: Should be the phandle to the emac splitter soft IP node if
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
index 401383b..c1bab62 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
@@ -32,6 +32,7 @@
 #define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII 0x2
 #define SYSMGR_EMACGRP_CTRL_PHYSEL_WIDTH 2
 #define SYSMGR_EMACGRP_CTRL_PHYSEL_MASK 0x00000003
+#define SYSMGR_EMACGRP_CTRL_PTP_REF_CLK_MASK 0x00000010
 
 #define EMAC_SPLITTER_CTRL_REG			0x0
 #define EMAC_SPLITTER_CTRL_SPEED_MASK		0x3
@@ -47,6 +48,7 @@ struct socfpga_dwmac {
 	struct regmap *sys_mgr_base_addr;
 	struct reset_control *stmmac_rst;
 	void __iomem *splitter_base;
+	bool f2h_ptp_ref_clk;
 };
 
 static void socfpga_dwmac_fix_mac_speed(void *priv, unsigned int speed)
@@ -116,6 +118,9 @@ static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *
 		return -EINVAL;
 	}
 
+	dwmac->f2h_ptp_ref_clk = of_property_read_bool(np, "f2h_ptp_ref_clk");
+
+
 	np_splitter = of_parse_phandle(np, "altr,emac-splitter", 0);
 	if (np_splitter) {
 		if (of_address_to_resource(np_splitter, 0, &res_splitter)) {
@@ -171,6 +176,11 @@ static int socfpga_dwmac_setup(struct socfpga_dwmac *dwmac)
 	ctrl &= ~(SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << reg_shift);
 	ctrl |= val << reg_shift;
 
+	if(dwmac->f2h_ptp_ref_clk) 
+		ctrl |= SYSMGR_EMACGRP_CTRL_PTP_REF_CLK_MASK << (reg_shift / 2);
+	else
+		ctrl &= ~(SYSMGR_EMACGRP_CTRL_PTP_REF_CLK_MASK << (reg_shift / 2));
+
 	regmap_write(sys_mgr_base_addr, reg_offset, ctrl);
 	return 0;
 }
-- 
1.8.3.1

Re: [PATCH 1/1] stmmac: socfpga: Provide dt node to config ptp clk source.

[David Miller]

From: Phil Reid <preid@electromag.com.au>
Date: Mon,  7 Dec 2015 09:38:40 +0800

> @@ -116,6 +118,9 @@ static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *
>  		return -EINVAL;
>  	}
>  
> +	dwmac->f2h_ptp_ref_clk = of_property_read_bool(np, "f2h_ptp_ref_clk");
> +
> +

Too many empty lines.

>  	np_splitter = of_parse_phandle(np, "altr,emac-splitter", 0);
>  	if (np_splitter) {
>  		if (of_address_to_resource(np_splitter, 0, &res_splitter)) {
> @@ -171,6 +176,11 @@ static int socfpga_dwmac_setup(struct socfpga_dwmac *dwmac)
>  	ctrl &= ~(SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << reg_shift);
>  	ctrl |= val << reg_shift;
>  
> +	if(dwmac->f2h_ptp_ref_clk) 

Improperly formatted, there must be a space between the 'if' and the
openning parenthesis of the condition.

Re: [PATCH 1/1] stmmac: socfpga: Provide dt node to config ptp clk source.

[Sergei Shtylyov]

Hello.

On 12/07/2015 04:38 AM, Phil Reid wrote:

    How about change log?

> Signed-off-by: Phil Reid <preid-qgqNFa1JUf/o2iN0hyhwsIdd74u8MsAO@public.gmane.org>
> ---
>   Documentation/devicetree/bindings/net/socfpga-dwmac.txt |  2 ++
>   drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c     | 10 ++++++++++
>   2 files changed, 12 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/net/socfpga-dwmac.txt b/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
> index 3a9d679..72d82d6 100644
> --- a/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
> +++ b/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
> @@ -11,6 +11,8 @@ Required properties:
>   		  designware version numbers documented in stmmac.txt
>    - altr,sysmgr-syscon : Should be the phandle to the system manager node that
>      encompasses the glue register, the register offset, and the register shift.
> + - altr,f2h_ptp_ref_clk use f2h_ptp_ref_clk instead of default eosc1 clock

    Colon missed after the prop name. And in general, hyphens are preferred to 
underscores in the device tree names.

> +   for ptp ref clk. This affects all emacs as the clock is common.
>
>   Optional properties:
>   altr,emac-splitter: Should be the phandle to the emac splitter soft IP node if
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
> index 401383b..c1bab62 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
[...]
> @@ -116,6 +118,9 @@ static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *
>   		return -EINVAL;
>   	}
>
> +	dwmac->f2h_ptp_ref_clk = of_property_read_bool(np, "f2h_ptp_ref_clk");

    Where is "altr,"?

[...]

MBR, Sergei

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[PATCH v2 2/5] stmmac: Correct documentation on stmmac clocks.

[Phil Reid]

devm_get_clk looks in clock-name property for matching clock.
the ptp_ref_clk property is ignored.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Phil Reid <preid@electromag.com.au>
---
 Documentation/devicetree/bindings/net/stmmac.txt | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/stmmac.txt b/Documentation/devicetree/bindings/net/stmmac.txt
index cb6288e..90af2e0 100644
--- a/Documentation/devicetree/bindings/net/stmmac.txt
+++ b/Documentation/devicetree/bindings/net/stmmac.txt
@@ -35,15 +35,14 @@ Optional properties:
 - reset-names: Should contain the reset signal name "stmmaceth", if a
 	reset phandle is given
 - max-frame-size: See ethernet.txt file in the same directory
-- clocks: If present, the first clock should be the GMAC main clock and
-  the second clock should be peripheral's register interface clock. Further
-  clocks may be specified in derived bindings.
-- clock-names: One name for each entry in the clocks property, the
-  first one should be "stmmaceth" and the second one should be "pclk".
-- clk_ptp_ref: this is the PTP reference clock; in case of the PTP is
-  available this clock is used for programming the Timestamp Addend Register.
-  If not passed then the system clock will be used and this is fine on some
-  platforms.
+- clocks: If present, the first clock should be the GMAC main clock
+  The optional second clock should be peripheral's register interface clock.
+  The third optional clock should be the ptp reference clock. 
+  Further clocks may be specified in derived bindings.
+- clock-names: One name for each entry in the clocks property.
+  The first one should be "stmmaceth".
+  The optional second one should be "pclk".
+  The optional third one should be "clk_ptp_ref".
 - snps,burst_len: The AXI burst lenth value of the AXI BUS MODE register.
 - tx-fifo-depth: See ethernet.txt file in the same directory
 - rx-fifo-depth: See ethernet.txt file in the same directory
-- 
1.8.3.1

[PATCH v2 3/5] stmmac: Fix calculations for ptp counters when clock input = 50Mhz.

[Phil Reid]

stmmac_config_sub_second_increment set the sub second increment to 20ns.
Driver is configured to use the fine adjustment method where the sub second
register is incremented when the acculumator incremented by the addend
register wraps overflows. This accumulator is update on every ptp clk
cycle. If a ptp clk with a period of greater than 20ns was used the
sub second register would not get updated correctly.

Instead set the sub sec increment to twice the period of the ptp clk.
This result in the addend register being set mid range and overflow
the accumlator every 2 clock cycles.

Signed-off-by: Phil Reid <preid@electromag.com.au>
---
 drivers/net/ethernet/stmicro/stmmac/common.h          |  2 +-
 drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c |  8 +++++---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c     | 18 +++++++-----------
 3 files changed, 13 insertions(+), 15 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
index f4518bc..1e19c8f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/common.h
+++ b/drivers/net/ethernet/stmicro/stmmac/common.h
@@ -439,7 +439,7 @@ struct stmmac_ops {
 /* PTP and HW Timer helpers */
 struct stmmac_hwtimestamp {
 	void (*config_hw_tstamping) (void __iomem *ioaddr, u32 data);
-	void (*config_sub_second_increment) (void __iomem *ioaddr);
+	u32 (*config_sub_second_increment) (void __iomem *ioaddr, u32 clk_rate);
 	int (*init_systime) (void __iomem *ioaddr, u32 sec, u32 nsec);
 	int (*config_addend) (void __iomem *ioaddr, u32 addend);
 	int (*adjust_systime) (void __iomem *ioaddr, u32 sec, u32 nsec,
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c
index 76ad214..83fa263 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c
@@ -33,22 +33,24 @@ static void stmmac_config_hw_tstamping(void __iomem *ioaddr, u32 data)
 	writel(data, ioaddr + PTP_TCR);
 }
 
-static void stmmac_config_sub_second_increment(void __iomem *ioaddr)
+static u32 stmmac_config_sub_second_increment(void __iomem *ioaddr, u32 ptp_clock)
 {
 	u32 value = readl(ioaddr + PTP_TCR);
 	unsigned long data;
 
 	/* Convert the ptp_clock to nano second
-	 * formula = (1/ptp_clock) * 1000000000
+	 * formula = (2/ptp_clock) * 1000000000
 	 * where, ptp_clock = 50MHz.
 	 */
-	data = (1000000000ULL / 50000000);
+	data = (2000000000ULL / ptp_clock);
 
 	/* 0.465ns accuracy */
 	if (!(value & PTP_TCR_TSCTRLSSR))
 		data = (data * 1000) / 465;
 
 	writel(data, ioaddr + PTP_SSIR);
+	
+	return data;
 }
 
 static int stmmac_init_systime(void __iomem *ioaddr, u32 sec, u32 nsec)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 3c6549a..ab8d916 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -53,6 +53,7 @@
 #include "stmmac.h"
 #include <linux/reset.h>
 #include <linux/of_mdio.h>
+#include "dwmac1000.h"
 
 #define STMMAC_ALIGN(x)	L1_CACHE_ALIGN(x)
 
@@ -185,7 +186,7 @@ static void stmmac_clk_csr_set(struct stmmac_priv *priv)
 			priv->clk_csr = STMMAC_CSR_100_150M;
 		else if ((clk_rate >= CSR_F_150M) && (clk_rate < CSR_F_250M))
 			priv->clk_csr = STMMAC_CSR_150_250M;
-		else if ((clk_rate >= CSR_F_250M) && (clk_rate <= CSR_F_300M))
+		else if ((clk_rate >= CSR_F_250M) && (clk_rate < CSR_F_300M))
 			priv->clk_csr = STMMAC_CSR_250_300M;
 	}
 }
@@ -435,6 +436,7 @@ static int stmmac_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
 	u32 ts_master_en = 0;
 	u32 ts_event_en = 0;
 	u32 value = 0;
+	u32 sec_inc;
 
 	if (!(priv->dma_cap.time_stamp || priv->adv_ts)) {
 		netdev_alert(priv->dev, "No support for HW time stamping\n");
@@ -598,24 +600,18 @@ static int stmmac_hwtstamp_ioctl(struct net_device *dev, struct ifreq *ifr)
 			 tstamp_all | ptp_v2 | ptp_over_ethernet |
 			 ptp_over_ipv6_udp | ptp_over_ipv4_udp | ts_event_en |
 			 ts_master_en | snap_type_sel);
-
 		priv->hw->ptp->config_hw_tstamping(priv->ioaddr, value);
 
 		/* program Sub Second Increment reg */
-		priv->hw->ptp->config_sub_second_increment(priv->ioaddr);
+		sec_inc = priv->hw->ptp->config_sub_second_increment(priv->ioaddr, priv->clk_ptp_rate);
+		temp = div_u64(1000000000ULL, sec_inc);
 
 		/* calculate default added value:
 		 * formula is :
 		 * addend = (2^32)/freq_div_ratio;
-		 * where, freq_div_ratio = clk_ptp_ref_i/50MHz
-		 * hence, addend = ((2^32) * 50MHz)/clk_ptp_ref_i;
-		 * NOTE: clk_ptp_ref_i should be >= 50MHz to
-		 *       achieve 20ns accuracy.
-		 *
-		 * 2^x * y == (y << x), hence
-		 * 2^32 * 50000000 ==> (50000000 << 32)
+		 * where, freq_div_ratio = 1e9ns/sec_inc
 		 */
-		temp = (u64) (50000000ULL << 32);
+		temp = (u64) (temp << 32);
 		priv->default_addend = div_u64(temp, priv->clk_ptp_rate);
 		priv->hw->ptp->config_addend(priv->ioaddr,
 					     priv->default_addend);
-- 
1.8.3.1

[PATCH v2 4/5] stmmac: Add ptp debugfs entry.

[Phil Reid]

This adds a debugfs entry to view the current status of the ptp
registers.

Signed-off-by: Phil Reid <preid@electromag.com.au>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac.h      |  1 +
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 61 +++++++++++++++++++++++
 drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.h  |  5 ++
 3 files changed, 67 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index 1f3b33a..d0ac1b1 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -130,6 +130,7 @@ struct stmmac_priv {
 	struct dentry *dbgfs_dir;
 	struct dentry *dbgfs_rings_status;
 	struct dentry *dbgfs_dma_cap;
+	struct dentry *dbgfs_ptp;
 #endif
 };
 
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index ab8d916..f75b2f9 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2657,6 +2657,57 @@ static const struct file_operations stmmac_dma_cap_fops = {
 	.release = single_release,
 };
 
+static int stmmac_sysfs_ptp_read(struct seq_file *seq, void *v)
+{
+	struct net_device *dev = seq->private;
+	struct stmmac_priv *priv = netdev_priv(dev);
+
+	if (!(priv->dma_cap.time_stamp || priv->adv_ts)) {
+		seq_printf(seq, "PTP HW features not supported\n");
+		return 0;
+	}
+
+	seq_printf(seq, "==============================\n");
+	seq_printf(seq, "\tPTP Status\n");
+	seq_printf(seq, "==============================\n");
+	
+	#define DUMP_REG(x) seq_printf(seq, "%-20s       %04x  %08x\n", #x, x, readl(priv->ioaddr + x));
+	DUMP_REG(GMAC_INT_STATUS);
+	DUMP_REG(GMAC_INT_MASK);
+
+	DUMP_REG(PTP_TCR);
+	DUMP_REG(PTP_SSIR);
+	DUMP_REG(PTP_STSR);
+	DUMP_REG(PTP_STNSR);
+	DUMP_REG(PTP_STSUR);
+	DUMP_REG(PTP_STNSUR);
+	DUMP_REG(PTP_TAR);
+	DUMP_REG(PTP_TTSR);
+	DUMP_REG(PTP_TTNSR);
+	DUMP_REG(PTP_STHWSR);
+	DUMP_REG(PTP_TSR);
+	DUMP_REG(PTP_PPSCTLR);
+	DUMP_REG(PTP_AUXTSTNSR);
+	DUMP_REG(PTP_AUXTSTSR);
+	DUMP_REG(PTP_PPS0INTRR);
+	DUMP_REG(PTP_PPS0WDTHR);
+
+	return 0;
+}
+
+static int stmmac_sysfs_ptp_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, stmmac_sysfs_ptp_read, inode->i_private);
+}
+
+static const struct file_operations stmmac_ptp_fops = {
+	.owner = THIS_MODULE,
+	.open = stmmac_sysfs_ptp_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
 static int stmmac_init_fs(struct net_device *dev)
 {
 	struct stmmac_priv *priv = netdev_priv(dev);
@@ -2692,6 +2743,16 @@ static int stmmac_init_fs(struct net_device *dev)
 	if (!priv->dbgfs_dma_cap || IS_ERR(priv->dbgfs_dma_cap)) {
 		pr_info("ERROR creating stmmac MMC debugfs file\n");
 		debugfs_remove_recursive(priv->dbgfs_dir);
+	}
+
+	/* Entry to report the PTP status */
+	priv->dbgfs_ptp = debugfs_create_file("ptp", S_IRUGO,
+					    priv->dbgfs_dir,
+					    dev, &stmmac_ptp_fops);
+
+	if (!priv->dbgfs_ptp || IS_ERR(priv->dbgfs_ptp)) {
+		pr_info("ERROR creating stmmac PTP debugfs file\n");
+		debugfs_remove_recursive(priv->dbgfs_dir);
 
 		return -ENOMEM;
 	}
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.h b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.h
index 4535df3..b00b005 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.h
@@ -37,6 +37,11 @@
 #define PTP_TTNSR	0x0720	/* Target Time Nanoseconds Reg */
 #define	PTP_STHWSR	0x0724	/* System Time - Higher Word Seconds Reg */
 #define PTP_TSR		0x0728	/* Timestamp Status */
+#define PTP_PPSCTLR	0x072C	/* PPS Control Reg */
+#define PTP_AUXTSTNSR	0x0730	/* Aux Timestamp - Nanoseconds Reg */
+#define PTP_AUXTSTSR	0x0734	/* Aux Timestamp - Seconds Reg */
+#define PTP_PPS0INTRR	0x0760	/* PPS0 Interval Reg */
+#define PTP_PPS0WDTHR	0x0764	/* PPS0 Width Reg */
 
 #define PTP_STNSUR_ADDSUB_SHIFT 31
 
-- 
1.8.3.1

Re: [PATCH v2 4/5] stmmac: Add ptp debugfs entry.

[Arnd Bergmann]

On Monday 07 December 2015 09:38:43 Phil Reid wrote:
> This adds a debugfs entry to view the current status of the ptp
> registers.
> 
> Signed-off-by: Phil Reid <preid-qgqNFa1JUf/o2iN0hyhwsIdd74u8MsAO@public.gmane.org>
> 

Your description should explain what this is good for. Why do you
need to look at this through debugfs?

	Arnd
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Re: [PATCH v2 4/5] stmmac: Add ptp debugfs entry.

[Phil Reid]

On 7/12/2015 5:03 PM, Arnd Bergmann wrote:
> On Monday 07 December 2015 09:38:43 Phil Reid wrote:
>> This adds a debugfs entry to view the current status of the ptp
>> registers.
>>
>> Signed-off-by: Phil Reid <preid@electromag.com.au>
>>
>
> Your description should explain what this is good for. Why do you
> need to look at this through debugfs?
>

Happy to drop this one. I found it helpful when debugging the ptp
behaviour. Allowing quick access to monitor the register updates
by the ptp driver. Is there an alternative method that is preferred?

-- 
Regards
Phil Reid

Re: [PATCH v2 4/5] stmmac: Add ptp debugfs entry.

[Arnd Bergmann]

On Monday 07 December 2015 21:37:52 Phil Reid wrote:
> On 7/12/2015 5:03 PM, Arnd Bergmann wrote:
> > On Monday 07 December 2015 09:38:43 Phil Reid wrote:
> >> This adds a debugfs entry to view the current status of the ptp
> >> registers.
> >>
> >> Signed-off-by: Phil Reid <preid-qgqNFa1JUf/o2iN0hyhwsIdd74u8MsAO@public.gmane.org>
> >>
> >
> > Your description should explain what this is good for. Why do you
> > need to look at this through debugfs?
> >
> 
> Happy to drop this one. I found it helpful when debugging the ptp
> behaviour. Allowing quick access to monitor the register updates
> by the ptp driver. Is there an alternative method that is preferred?

For tracing what the driver does, I'd add a trace event, which also
lets you see when any updates happen.

	Arnd
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[PATCH v2 5/5] stmmac: socfpga: Provide dt node to config ptp clk source.

[Phil Reid]

Signed-off-by: Phil Reid <preid-qgqNFa1JUf/o2iN0hyhwsIdd74u8MsAO@public.gmane.org>
---
 Documentation/devicetree/bindings/net/socfpga-dwmac.txt | 2 ++
 drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c     | 9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/socfpga-dwmac.txt b/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
index 3a9d679..72d82d6 100644
--- a/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
+++ b/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
@@ -11,6 +11,8 @@ Required properties:
 		  designware version numbers documented in stmmac.txt
  - altr,sysmgr-syscon : Should be the phandle to the system manager node that
    encompasses the glue register, the register offset, and the register shift.
+ - altr,f2h_ptp_ref_clk use f2h_ptp_ref_clk instead of default eosc1 clock
+   for ptp ref clk. This affects all emacs as the clock is common.
 
 Optional properties:
 altr,emac-splitter: Should be the phandle to the emac splitter soft IP node if
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
index 401383b..3c5bc12 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
@@ -32,6 +32,7 @@
 #define SYSMGR_EMACGRP_CTRL_PHYSEL_ENUM_RMII 0x2
 #define SYSMGR_EMACGRP_CTRL_PHYSEL_WIDTH 2
 #define SYSMGR_EMACGRP_CTRL_PHYSEL_MASK 0x00000003
+#define SYSMGR_EMACGRP_CTRL_PTP_REF_CLK_MASK 0x00000010
 
 #define EMAC_SPLITTER_CTRL_REG			0x0
 #define EMAC_SPLITTER_CTRL_SPEED_MASK		0x3
@@ -47,6 +48,7 @@ struct socfpga_dwmac {
 	struct regmap *sys_mgr_base_addr;
 	struct reset_control *stmmac_rst;
 	void __iomem *splitter_base;
+	bool f2h_ptp_ref_clk;
 };
 
 static void socfpga_dwmac_fix_mac_speed(void *priv, unsigned int speed)
@@ -116,6 +118,8 @@ static int socfpga_dwmac_parse_data(struct socfpga_dwmac *dwmac, struct device *
 		return -EINVAL;
 	}
 
+	dwmac->f2h_ptp_ref_clk = of_property_read_bool(np, "altr,f2h_ptp_ref_clk");
+
 	np_splitter = of_parse_phandle(np, "altr,emac-splitter", 0);
 	if (np_splitter) {
 		if (of_address_to_resource(np_splitter, 0, &res_splitter)) {
@@ -171,6 +175,11 @@ static int socfpga_dwmac_setup(struct socfpga_dwmac *dwmac)
 	ctrl &= ~(SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << reg_shift);
 	ctrl |= val << reg_shift;
 
+	if(dwmac->f2h_ptp_ref_clk) 
+		ctrl |= SYSMGR_EMACGRP_CTRL_PTP_REF_CLK_MASK << (reg_shift / 2);
+	else
+		ctrl &= ~(SYSMGR_EMACGRP_CTRL_PTP_REF_CLK_MASK << (reg_shift / 2));
+
 	regmap_write(sys_mgr_base_addr, reg_offset, ctrl);
 	return 0;
 }
-- 
1.8.3.1

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Re: [PATCH v2 5/5] stmmac: socfpga: Provide dt node to config ptp clk source.

[Arnd Bergmann]

On Monday 07 December 2015 09:38:44 Phil Reid wrote:
> Signed-off-by: Phil Reid <preid@electromag.com.au>
> ---
>  Documentation/devicetree/bindings/net/socfpga-dwmac.txt | 2 ++
>  drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c     | 9 +++++++++
>  2 files changed, 11 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/net/socfpga-dwmac.txt b/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
> index 3a9d679..72d82d6 100644
> --- a/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
> +++ b/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
> @@ -11,6 +11,8 @@ Required properties:
>                   designware version numbers documented in stmmac.txt
>   - altr,sysmgr-syscon : Should be the phandle to the system manager node that
>     encompasses the glue register, the register offset, and the register shift.
> + - altr,f2h_ptp_ref_clk use f2h_ptp_ref_clk instead of default eosc1 clock
> +   for ptp ref clk. This affects all emacs as the clock is common.
> 

Is this feature specific to the Altera glue logic, or would it be possible
to do the same thing on another dwmac implementation?

	Arnd

Re: [PATCH v2 5/5] stmmac: socfpga: Provide dt node to config ptp clk source.

[Phil Reid]

On 7/12/2015 5:05 PM, Arnd Bergmann wrote:
> On Monday 07 December 2015 09:38:44 Phil Reid wrote:
>> Signed-off-by: Phil Reid <preid@electromag.com.au>
>> ---
>>   Documentation/devicetree/bindings/net/socfpga-dwmac.txt | 2 ++
>>   drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c     | 9 +++++++++
>>   2 files changed, 11 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/net/socfpga-dwmac.txt b/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
>> index 3a9d679..72d82d6 100644
>> --- a/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
>> +++ b/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
>> @@ -11,6 +11,8 @@ Required properties:
>>                    designware version numbers documented in stmmac.txt
>>    - altr,sysmgr-syscon : Should be the phandle to the system manager node that
>>      encompasses the glue register, the register offset, and the register shift.
>> + - altr,f2h_ptp_ref_clk use f2h_ptp_ref_clk instead of default eosc1 clock
>> +   for ptp ref clk. This affects all emacs as the clock is common.
>>
>
> Is this feature specific to the Altera glue logic, or would it be possible
> to do the same thing on another dwmac implementation?
>
I think it is specific to Altera's glue logic. It selects either a clock connected
directly to the ARM HPS core or a clock routed from Altera FPGA fabric.
Control register is in the altera sysmgr.

-- 
Regards
Phil Reid

Re: [PATCH v2 5/5] stmmac: socfpga: Provide dt node to config ptp clk source.

[Arnd Bergmann]

On Monday 07 December 2015 21:34:29 Phil Reid wrote:
> On 7/12/2015 5:05 PM, Arnd Bergmann wrote:
> > On Monday 07 December 2015 09:38:44 Phil Reid wrote:
> >> Signed-off-by: Phil Reid <preid@electromag.com.au>
> >> ---
> >>   Documentation/devicetree/bindings/net/socfpga-dwmac.txt | 2 ++
> >>   drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c     | 9 +++++++++
> >>   2 files changed, 11 insertions(+)
> >>
> >> diff --git a/Documentation/devicetree/bindings/net/socfpga-dwmac.txt b/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
> >> index 3a9d679..72d82d6 100644
> >> --- a/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
> >> +++ b/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
> >> @@ -11,6 +11,8 @@ Required properties:
> >>                    designware version numbers documented in stmmac.txt
> >>    - altr,sysmgr-syscon : Should be the phandle to the system manager node that
> >>      encompasses the glue register, the register offset, and the register shift.
> >> + - altr,f2h_ptp_ref_clk use f2h_ptp_ref_clk instead of default eosc1 clock
> >> +   for ptp ref clk. This affects all emacs as the clock is common.
> >>
> >
> > Is this feature specific to the Altera glue logic, or would it be possible
> > to do the same thing on another dwmac implementation?
> >
> I think it is specific to Altera's glue logic. It selects either a clock connected
> directly to the ARM HPS core or a clock routed from Altera FPGA fabric.
> Control register is in the altera sysmgr.
> 
> 

Ok, makes sense.

	Arnd

Re: [PATCH v2 5/5] stmmac: socfpga: Provide dt node to config ptp clk source.

[Sergei Shtylyov]

On 12/07/2015 04:38 AM, Phil Reid wrote:

> Signed-off-by: Phil Reid <preid@electromag.com.au>
> ---
>   Documentation/devicetree/bindings/net/socfpga-dwmac.txt | 2 ++
>   drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c     | 9 +++++++++
>   2 files changed, 11 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/net/socfpga-dwmac.txt b/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
> index 3a9d679..72d82d6 100644
> --- a/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
> +++ b/Documentation/devicetree/bindings/net/socfpga-dwmac.txt
> @@ -11,6 +11,8 @@ Required properties:
>   		  designware version numbers documented in stmmac.txt
>    - altr,sysmgr-syscon : Should be the phandle to the system manager node that
>      encompasses the glue register, the register offset, and the register shift.
> + - altr,f2h_ptp_ref_clk use f2h_ptp_ref_clk instead of default eosc1 clock
> +   for ptp ref clk. This affects all emacs as the clock is common.
>
>   Optional properties:
>   altr,emac-splitter: Should be the phandle to the emac splitter soft IP node if
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
> index 401383b..3c5bc12 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
[...]
> @@ -171,6 +175,11 @@ static int socfpga_dwmac_setup(struct socfpga_dwmac *dwmac)
>   	ctrl &= ~(SYSMGR_EMACGRP_CTRL_PHYSEL_MASK << reg_shift);
>   	ctrl |= val << reg_shift;
>
> +	if(dwmac->f2h_ptp_ref_clk)

    Please run your patches thru scripts/checkpatch.pl (space needed after *if*).

[...]

MBR, Sergei

Re: [PATCH v2 5/5] stmmac: socfpga: Provide dt node to config ptp clk source.

[Phil Reid]

On 7/12/2015 7:59 PM, Sergei Shtylyov wrote:
> On 12/07/2015 04:38 AM, Phil Reid wrote:
>> +    if(dwmac->f2h_ptp_ref_clk)
>
>     Please run your patches thru scripts/checkpatch.pl (space needed after *if*).
>
> [...]
>
> MBR, Sergei
>

Will do.

-- 
Regards
Phil Reid