[PATCH v1 0/5] imx6qp QuadPlus: support improved enet clocking

[PATCH v1 0/5] imx6qp QuadPlus: support improved enet clocking

[Sven Van Asbroeck]

On the imx6qp QuadPlus, the h/w designers have improved enet clocking.

This patchset extends the clock tree to reflect the situation on QuadPlus.

This allows board designers to choose the enet clocking method by making
simple clocktree changes in the devicetree.

Default setting: external routing of enet_ref from pad to pad.

Example, change the default to enet_ref @ 125MHz clock routed internally:

&fec {
	assigned-clocks = <&clks IMX6QDL_CLK_ENET_PTP>,
			  <&clks IMX6QDL_CLK_ENET_REF>;
	assigned-clock-parents = <&clks IMX6QDL_CLK_ENET_REF>;
	assigned-clock-rates = <0>, <125000000>;
};

To: Shawn Guo <shawnguo@kernel.org>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-clk@vger.kernel.org

Sven Van Asbroeck (5):
  ARM: mach-imx6q: do not select enet PTP clock source on QuadPlus
  clk: imx: add simple regmap-backed clock mux
  dt-bindings: imx6qdl-clock: add QuadPlus enet clocks
  clk: imx6q: support improved enet clocking on QuadPlus
  ARM: dts: imx6qp: support improved enet clocking on QuadPlus

 .../bindings/clock/imx6q-clock.yaml           |   2 +
 arch/arm/boot/dts/imx6qp.dtsi                 |   3 +
 arch/arm/mach-imx/mach-imx6q.c                |   4 +
 drivers/clk/imx/Makefile                      |   1 +
 drivers/clk/imx/clk-imx6q.c                   |  46 ++++++++
 drivers/clk/imx/clk-mux-regmap.c              | 110 ++++++++++++++++++
 drivers/clk/imx/clk.h                         |   7 ++
 include/dt-bindings/clock/imx6qdl-clock.h     |   5 +-
 include/linux/mfd/syscon/imx6q-iomuxc-gpr.h   |   1 +
 9 files changed, 178 insertions(+), 1 deletion(-)
 create mode 100644 drivers/clk/imx/clk-mux-regmap.c

-- 
2.17.1


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[PATCH v1 1/5] ARM: mach-imx6q: do not select enet PTP clock source on QuadPlus

[Sven Van Asbroeck]

On QuadPlus, the enet PTP clock source is selected via the clocktree.
Therefore it should not be set in the machine layer (mach-imx6q).

Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
---

Tree: v5.8-rc4

To: Shawn Guo <shawnguo@kernel.org>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-clk@vger.kernel.org

 arch/arm/mach-imx/mach-imx6q.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index 85c084a716ab..fcf211492f6f 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -169,6 +169,10 @@ static void __init imx6q_1588_init(void)
 	struct regmap *gpr;
 	u32 clksel;
 
+	/* QuadPlus selects PTP clock source via clocktree */
+	if (of_machine_is_compatible("fsl,imx6qp"))
+		return;
+
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-fec");
 	if (!np) {
 		pr_warn("%s: failed to find fec node\n", __func__);
-- 
2.17.1


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[PATCH v1 2/5] clk: imx: add simple regmap-backed clock mux

[Sven Van Asbroeck]

On the imx6 QuadPlus, some clocktree muxes have control bits located
in the GPR area. This area is already modelled as a syscon regmap.

To control these muxes, add a simple regmap-backed clock mux.

Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
---

Tree: v5.8-rc4

To: Shawn Guo <shawnguo@kernel.org>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-clk@vger.kernel.org

 drivers/clk/imx/Makefile         |   1 +
 drivers/clk/imx/clk-mux-regmap.c | 110 +++++++++++++++++++++++++++++++
 drivers/clk/imx/clk.h            |   7 ++
 3 files changed, 118 insertions(+)
 create mode 100644 drivers/clk/imx/clk-mux-regmap.c

diff --git a/drivers/clk/imx/Makefile b/drivers/clk/imx/Makefile
index 928f874c73d2..3d36740c1efd 100644
--- a/drivers/clk/imx/Makefile
+++ b/drivers/clk/imx/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_MXC_CLK) += \
 	clk-pllv3.o \
 	clk-pllv4.o \
 	clk-sscg-pll.o \
+	clk-mux-regmap.o \
 	clk-pll14xx.o
 
 obj-$(CONFIG_MXC_CLK_SCU) += \
diff --git a/drivers/clk/imx/clk-mux-regmap.c b/drivers/clk/imx/clk-mux-regmap.c
new file mode 100644
index 000000000000..ba5fde525999
--- /dev/null
+++ b/drivers/clk/imx/clk-mux-regmap.c
@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Sven Van Asbroeck
+ *
+ * Simple clock multiplexer, backed by a regmap
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#include "clk.h"
+
+struct clk_mux_regmap {
+	struct clk_hw hw;
+	struct regmap *regmap;
+	unsigned int reg;
+	u8 shift;
+	u32 mask;
+};
+
+#define to_clk_mux_regmap(_hw) container_of(_hw, struct clk_mux_regmap, hw)
+
+static u8 clk_regmap_read_index(struct clk_mux_regmap *clk)
+{
+	unsigned int val;
+
+	if (regmap_read(clk->regmap, clk->reg, &val))
+		return 0;
+
+	val >>= clk->shift;
+	val &= clk->mask;
+
+	return (u8)val;
+}
+
+static u8 clk_mux_regmap_get_parent(struct clk_hw *hw)
+{
+	struct clk_mux_regmap *clk = to_clk_mux_regmap(hw);
+
+	return clk_regmap_read_index(clk);
+}
+
+static int clk_mux_regmap_set_parent(struct clk_hw *hw, u8 index)
+{
+	struct clk_mux_regmap *clk = to_clk_mux_regmap(hw);
+
+	return regmap_update_bits(clk->regmap, clk->reg,
+				  clk->mask << clk->shift,
+				  (unsigned int)index << clk->shift);
+}
+
+static int clk_mux_regmap_determine_rate(struct clk_hw *hw,
+					 struct clk_rate_request *req)
+{
+	struct clk_mux_regmap *clk = to_clk_mux_regmap(hw);
+	struct clk_hw *parent;
+	u8 index;
+
+	index = clk_regmap_read_index(clk);
+	parent = clk_hw_get_parent_by_index(hw, index);
+	if (!parent)
+		return -EINVAL;
+	req->rate = clk_hw_get_rate(parent);
+
+	return 0;
+}
+
+static const struct clk_ops clk_mux_regmap_ops = {
+	.get_parent = clk_mux_regmap_get_parent,
+	.set_parent = clk_mux_regmap_set_parent,
+	.determine_rate = clk_mux_regmap_determine_rate,
+};
+
+struct clk_hw *
+imx_clk_hw_mux_regmap(const char *name, struct regmap *regmap, unsigned int reg,
+		      u8 shift, u8 width, const char * const *parent_names,
+		      int num_parents)
+{
+	struct clk_mux_regmap *clk_regmap;
+	struct clk_init_data init = {};
+	struct clk_hw *hw;
+	int ret;
+
+	if (num_parents > (1 << width))
+		return ERR_PTR(-EINVAL);
+
+	clk_regmap = kzalloc(sizeof(*clk_regmap), GFP_KERNEL);
+	if (!clk_regmap)
+		return ERR_PTR(-ENOMEM);
+
+	init.name = name;
+	init.parent_names = parent_names;
+	init.num_parents = num_parents;
+	init.ops = &clk_mux_regmap_ops;
+	clk_regmap->regmap = regmap;
+	clk_regmap->reg = reg;
+	clk_regmap->shift = shift;
+	clk_regmap->mask = BIT(width) - 1;
+	clk_regmap->hw.init = &init;
+
+	hw = &clk_regmap->hw;
+	ret = clk_hw_register(NULL, hw);
+	if (ret) {
+		kfree(clk_regmap);
+		hw = ERR_PTR(ret);
+	}
+
+	return hw;
+}
diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h
index 16adbc34e05f..4df766abbe16 100644
--- a/drivers/clk/imx/clk.h
+++ b/drivers/clk/imx/clk.h
@@ -5,6 +5,8 @@
 #include <linux/spinlock.h>
 #include <linux/clk-provider.h>
 
+struct regmap;
+
 #define IMX_CLK_GATE2_SINGLE_BIT	1
 
 extern spinlock_t imx_ccm_lock;
@@ -447,6 +449,11 @@ static inline struct clk_hw *imx_dev_clk_hw_mux(struct device *dev,
 			reg, shift, width, 0, &imx_ccm_lock);
 }
 
+struct clk_hw *
+imx_clk_hw_mux_regmap(const char *name, struct regmap *regmap, unsigned int reg,
+		      u8 shift, u8 width, const char * const *parent_names,
+		      int num_parents);
+
 static inline struct clk *imx_clk_mux2(const char *name, void __iomem *reg,
 			u8 shift, u8 width, const char * const *parents,
 			int num_parents)
-- 
2.17.1


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[PATCH v1 3/5] dt-bindings: imx6qdl-clock: add QuadPlus enet clocks

[Sven Van Asbroeck]

On the QuadPlus, hardware designers have improved the enet clocking.
Add these QuadPlus-specific clocks to the dt-bindings.

Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
---

Tree: v5.8-rc4

To: Shawn Guo <shawnguo@kernel.org>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-clk@vger.kernel.org

 Documentation/devicetree/bindings/clock/imx6q-clock.yaml | 2 ++
 include/dt-bindings/clock/imx6qdl-clock.h                | 5 ++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/clock/imx6q-clock.yaml b/Documentation/devicetree/bindings/clock/imx6q-clock.yaml
index 92a8e545e212..ecd28403eeff 100644
--- a/Documentation/devicetree/bindings/clock/imx6q-clock.yaml
+++ b/Documentation/devicetree/bindings/clock/imx6q-clock.yaml
@@ -34,6 +34,7 @@ properties:
       - description: ckih1 clock input
       - description: anaclk1 clock input
       - description: anaclk2 clock input
+      - description: anaclk3 clock input
 
   clock-names:
     items:
@@ -42,6 +43,7 @@ properties:
       - const: ckih1
       - const: anaclk1
       - const: anaclk2
+      - const: anaclk3
 
   fsl,pmic-stby-poweroff:
     $ref: /schemas/types.yaml#/definitions/flag
diff --git a/include/dt-bindings/clock/imx6qdl-clock.h b/include/dt-bindings/clock/imx6qdl-clock.h
index e20c43cc36f6..afc6b7b1e3e6 100644
--- a/include/dt-bindings/clock/imx6qdl-clock.h
+++ b/include/dt-bindings/clock/imx6qdl-clock.h
@@ -273,6 +273,9 @@
 #define IMX6QDL_CLK_MMDC_P0_IPG			263
 #define IMX6QDL_CLK_DCIC1			264
 #define IMX6QDL_CLK_DCIC2			265
-#define IMX6QDL_CLK_END				266
+#define IMX6QDL_CLK_ENET_PAD			266
+#define IMX6QDL_CLK_ENET_PTP			267
+#define IMX6QDL_CLK_ANACLK3			268
+#define IMX6QDL_CLK_END				269
 
 #endif /* __DT_BINDINGS_CLOCK_IMX6QDL_H */
-- 
2.17.1


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[PATCH v1 4/5] clk: imx6q: support improved enet clocking on QuadPlus

[Sven Van Asbroeck]

On the imx6q QuadPlus, hardware designers have improved the enet
clocking:
                          _
	 anaclk3---------| \
	                 |  |              _
	                 |M |--enet_pad-->| \
	                 |  |             |  |
	 enet_ref---o--->|_/              |M |----enet_ptp
	            |                     |  |
	            o---------------------|_/

Where anaclk3 is an external clock fed into the imx6q via
a pad, typically RGMII_TX_CTL or GPIO_16, when these are
configured in mux mode ENET_REF_CLK.

Board designers can now change the clock tree (via the devicetree)
to choose between all three supported enet clocking methods.

See follow-up devicetree patch for details.

Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
---

Tree: v5.8-rc4

To: Shawn Guo <shawnguo@kernel.org>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-clk@vger.kernel.org

 drivers/clk/imx/clk-imx6q.c                 | 46 +++++++++++++++++++++
 include/linux/mfd/syscon/imx6q-iomuxc-gpr.h |  1 +
 2 files changed, 47 insertions(+)

diff --git a/drivers/clk/imx/clk-imx6q.c b/drivers/clk/imx/clk-imx6q.c
index ba33c79158de..0edffa306a28 100644
--- a/drivers/clk/imx/clk-imx6q.c
+++ b/drivers/clk/imx/clk-imx6q.c
@@ -15,6 +15,8 @@
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <soc/imx/revision.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
 #include <dt-bindings/clock/imx6qdl-clock.h>
 
 #include "clk.h"
@@ -87,6 +89,8 @@ static const char *pll4_bypass_sels[] = { "pll4", "pll4_bypass_src", };
 static const char *pll5_bypass_sels[] = { "pll5", "pll5_bypass_src", };
 static const char *pll6_bypass_sels[] = { "pll6", "pll6_bypass_src", };
 static const char *pll7_bypass_sels[] = { "pll7", "pll7_bypass_src", };
+static const char * const enet_pad_sels[] = { "anaclk3", "enet_ref", };
+static const char * const enet_ptp_sels[] = { "enet_pad", "enet_ref", };
 
 static struct clk_hw **hws;
 static struct clk_hw_onecell_data *clk_hw_data;
@@ -436,6 +440,7 @@ static struct clk_hw * __init imx6q_obtain_fixed_clk_hw(struct device_node *np,
 
 static void __init imx6q_clocks_init(struct device_node *ccm_node)
 {
+	struct regmap *gpr;
 	struct device_node *np;
 	void __iomem *anatop_base, *base;
 	int ret;
@@ -464,6 +469,9 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node)
 	WARN_ON(!base);
 	of_node_put(np);
 
+	gpr = syscon_regmap_lookup_by_compatible("fsl,imx6q-iomuxc-gpr");
+	WARN_ON(IS_ERR_OR_NULL(gpr));
+
 	/* Audio/video PLL post dividers do not work on i.MX6q revision 1.0 */
 	if (clk_on_imx6q() && imx_get_soc_revision() == IMX_CHIP_REVISION_1_0) {
 		post_div_table[1].div = 1;
@@ -959,6 +967,44 @@ static void __init imx6q_clocks_init(struct device_node *ccm_node)
 	/* Audio-related clocks configuration */
 	clk_set_parent(hws[IMX6QDL_CLK_SPDIF_SEL]->clk, hws[IMX6QDL_CLK_PLL3_PFD3_454M]->clk);
 
+	/*
+	 * The QuadPlus has improved enet clocking:
+	 *                  _
+	 * anaclk3---------| \
+	 *                 |  |              _
+	 *                 |M |--enet_pad-->| \
+	 *                 |  |             |  |
+	 * enet_ref---o--->|_/              |M |----enet_ptp
+	 *            |                     |  |
+	 *            o---------------------|_/
+	 *
+	 * On the plus, three options to generate the enet ptp clock:
+	 *
+	 * a) route enet_ref externally from pad to pad (the default):
+	 *    enet_ptp from enet_pad
+	 *    enet_pad from enet_ref
+	 * b) route internally on SoC from enet_ref:
+	 *    enet_ptp from enet_ref
+	 * c) route external clock (from PHY or oscillator) via pad:
+	 *    enet_ptp from enet_pad
+	 *    enet_pad from anaclk3
+	 *    anaclk3 from PHY or oscillator, add devicetree node
+	 */
+	if (clk_on_imx6qp()) {
+		/*
+		 * anaclk3: clock source from external clock via:
+		 * - RGMII_TX_CTL PAD (mux mode ENET_REF_CLK), or
+		 * - GPIO_16      PAD (mux mode ENET_REF_CLK)
+		 */
+		hws[IMX6QDL_CLK_ANACLK3] = imx6q_obtain_fixed_clk_hw(ccm_node, "anaclk3", 0);
+		hws[IMX6QDL_CLK_ENET_PAD] = imx_clk_hw_mux_regmap("enet_pad", gpr, IOMUXC_GPR1, ffs(IMX6Q_GPR1_ENET_CLK_SEL_MASK) - 1,
+								  1, enet_pad_sels, ARRAY_SIZE(enet_pad_sels));
+		hws[IMX6QDL_CLK_ENET_PTP] = imx_clk_hw_mux_regmap("enet_ptp", gpr, IOMUXC_GPR5, ffs(IMX6Q_GPR5_ENET_TXCLK_SEL_MASK) - 1,
+								  1, enet_ptp_sels, ARRAY_SIZE(enet_ptp_sels));
+		clk_set_parent(hws[IMX6QDL_CLK_ENET_PAD]->clk, hws[IMX6QDL_CLK_ENET_REF]->clk);
+		clk_set_parent(hws[IMX6QDL_CLK_ENET_PTP]->clk, hws[IMX6QDL_CLK_ENET_PAD]->clk);
+	}
+
 	/* All existing boards with PCIe use LVDS1 */
 	if (IS_ENABLED(CONFIG_PCI_IMX6))
 		clk_set_parent(hws[IMX6QDL_CLK_LVDS1_SEL]->clk, hws[IMX6QDL_CLK_SATA_REF_100M]->clk);
diff --git a/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h b/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h
index d4b5e527a7a3..ac1bb3695933 100644
--- a/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h
+++ b/include/linux/mfd/syscon/imx6q-iomuxc-gpr.h
@@ -240,6 +240,7 @@
 #define IMX6Q_GPR4_IPU_RD_CACHE_CTL		BIT(0)
 
 #define IMX6Q_GPR5_L2_CLK_STOP			BIT(8)
+#define IMX6Q_GPR5_ENET_TXCLK_SEL_MASK		BIT(9)
 #define IMX6Q_GPR5_SATA_SW_PD			BIT(10)
 #define IMX6Q_GPR5_SATA_SW_RST			BIT(11)
 
-- 
2.17.1


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[PATCH v1 5/5] ARM: dts: imx6qp: support improved enet clocking on QuadPlus

[Sven Van Asbroeck]

Board designers are now able to choose between all three supported
enet clocking methods, by changing the clocktree via the devicetree:

a) route enet_ref externally from pad to pad (the default):

no clock tree changes required

b) route internally on SoC from enet_ref

&fec {
    assigned-clocks = <&clks IMX6QDL_CLK_ENET_PTP>,
                      <&clks IMX6QDL_CLK_ENET_REF>;
    assigned-clock-parents = <&clks IMX6QDL_CLK_ENET_REF>;
    assigned-clock-rates = <0>, <125000000>;
};

c) route external clock (from PHY or oscillator) via pad

/ {
    clocks {
        phy_osc: anaclk3 {
            compatible = "fixed-clock";
            #clock-cells = <0>;
            clock-frequency = <125000000>;
       };
   };
};

&fec {
    assigned-clocks = <&clks IMX6QDL_CLK_ENET_PTP>,
                      <&clks IMX6QDL_CLK_ENET_PAD>;
    assigned-clock-parents = <&clks IMX6QDL_CLK_ENET_PAD>,
                             <&clks IMX6QDL_CLK_ANACLK3>;
};

Signed-off-by: Sven Van Asbroeck <TheSven73@gmail.com>
---

Tree: v5.8-rc4

To: Shawn Guo <shawnguo@kernel.org>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-clk@vger.kernel.org

 arch/arm/boot/dts/imx6qp.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/boot/dts/imx6qp.dtsi b/arch/arm/boot/dts/imx6qp.dtsi
index b310f13a53f2..7f81d35f56c9 100644
--- a/arch/arm/boot/dts/imx6qp.dtsi
+++ b/arch/arm/boot/dts/imx6qp.dtsi
@@ -79,6 +79,9 @@
 &fec {
 	interrupts = <0 118 IRQ_TYPE_LEVEL_HIGH>,
 		     <0 119 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&clks IMX6QDL_CLK_ENET>,
+		 <&clks IMX6QDL_CLK_ENET>,
+		 <&clks IMX6QDL_CLK_ENET_PTP>;
 };
 
 &gpc {
-- 
2.17.1


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Re: [PATCH v1 0/5] imx6qp QuadPlus: support improved enet clocking

[Shawn Guo]

On Sun, Jul 12, 2020 at 08:25:07PM -0400, Sven Van Asbroeck wrote:
> On the imx6qp QuadPlus, the h/w designers have improved enet clocking.
> 
> This patchset extends the clock tree to reflect the situation on QuadPlus.
> 
> This allows board designers to choose the enet clocking method by making
> simple clocktree changes in the devicetree.
> 
> Default setting: external routing of enet_ref from pad to pad.
> 
> Example, change the default to enet_ref @ 125MHz clock routed internally:
> 
> &fec {
> 	assigned-clocks = <&clks IMX6QDL_CLK_ENET_PTP>,
> 			  <&clks IMX6QDL_CLK_ENET_REF>;
> 	assigned-clock-parents = <&clks IMX6QDL_CLK_ENET_REF>;
> 	assigned-clock-rates = <0>, <125000000>;
> };
> 
> To: Shawn Guo <shawnguo@kernel.org>
> To: Sascha Hauer <s.hauer@pengutronix.de>
> Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: NXP Linux Team <linux-imx@nxp.com>
> Cc: linux-kernel@vger.kernel.org
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-clk@vger.kernel.org
> 
> Sven Van Asbroeck (5):
>   ARM: mach-imx6q: do not select enet PTP clock source on QuadPlus
>   clk: imx: add simple regmap-backed clock mux
>   dt-bindings: imx6qdl-clock: add QuadPlus enet clocks
>   clk: imx6q: support improved enet clocking on QuadPlus
>   ARM: dts: imx6qp: support improved enet clocking on QuadPlus

Hi Fugang,

Can you take a look at the series?

Shawn

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RE: [EXT] Re: [PATCH v1 0/5] imx6qp QuadPlus: support improved enet clocking

[Andy Duan]

From: Shawn Guo <shawnguo@kernel.org> Sent: Monday, August 17, 2020 3:17 PM
> On Sun, Jul 12, 2020 at 08:25:07PM -0400, Sven Van Asbroeck wrote:
> > On the imx6qp QuadPlus, the h/w designers have improved enet clocking.
> >
> > This patchset extends the clock tree to reflect the situation on QuadPlus.
> >
> > This allows board designers to choose the enet clocking method by
> > making simple clocktree changes in the devicetree.
> >
> > Default setting: external routing of enet_ref from pad to pad.
> >
> > Example, change the default to enet_ref @ 125MHz clock routed internally:
> >
> > &fec {
> >       assigned-clocks = <&clks IMX6QDL_CLK_ENET_PTP>,
> >                         <&clks IMX6QDL_CLK_ENET_REF>;
> >       assigned-clock-parents = <&clks IMX6QDL_CLK_ENET_REF>;
> >       assigned-clock-rates = <0>, <125000000>; };
> >
> > To: Shawn Guo <shawnguo@kernel.org>
> > To: Sascha Hauer <s.hauer@pengutronix.de>
> > Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
> > Cc: Fabio Estevam <festevam@gmail.com>
> > Cc: NXP Linux Team <linux-imx@nxp.com>
> > Cc: linux-kernel@vger.kernel.org
> > Cc: linux-arm-kernel@lists.infradead.org
> > Cc: linux-clk@vger.kernel.org
> >
> > Sven Van Asbroeck (5):
> >   ARM: mach-imx6q: do not select enet PTP clock source on QuadPlus
> >   clk: imx: add simple regmap-backed clock mux
> >   dt-bindings: imx6qdl-clock: add QuadPlus enet clocks
> >   clk: imx6q: support improved enet clocking on QuadPlus
> >   ARM: dts: imx6qp: support improved enet clocking on QuadPlus
> 
> Hi Fugang,
> 
> Can you take a look at the series?
> 
> Shawn

In fact, Sven already sent the patch list to me in private for review
due to miss cc to me. We discussed the series for long time and suppose
Sven will send v2 patch set.

Regards,
Fugang

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