diff mbox series

[02/23] arm64: zynqmp: Fix usb node drive strength and slew rate

Message ID 1b2914e5e6010b174c14603f92626ac3b11a2263.1683034376.git.michal.simek@amd.com (mailing list archive)
State New, archived
Headers show
Series arm64: zynqmp: Misc zynqmp changes | expand

Commit Message

Michal Simek May 2, 2023, 1:35 p.m. UTC 
From: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>

As per design, all input/rx pins should have fast slew rate and 12mA
drive strength. Rest all pins should be slow slew rate and 4mA drive
strength. Fix usb nodes as per this and remove setting of slow slew rate
for all the usb group pins.

Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
---

 .../arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso |  8 ++++++--
 .../arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso |  8 ++++++--
 .../boot/dts/xilinx/zynqmp-zc1751-xm015-dc1.dts     |  8 ++++++--
 .../boot/dts/xilinx/zynqmp-zc1751-xm016-dc2.dts     |  8 ++++++--
 arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dts   | 13 ++++++++++---
 arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts   |  5 ++++-
 arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revA.dts   |  6 ++++--
 arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revC.dts   |  6 ++++--
 arch/arm64/boot/dts/xilinx/zynqmp-zcu106-revA.dts   |  5 ++++-
 arch/arm64/boot/dts/xilinx/zynqmp-zcu111-revA.dts   |  5 ++++-
 10 files changed, 54 insertions(+), 18 deletions(-)

Comments

Michal Simek May 16, 2023, 1:30 p.m. UTC | #1 
Hi Laurent

On 5/10/23 08:54, Laurent Pinchart wrote:
> Hi Michal,
> 
> Thank you for the patch.
> 
> On Tue, May 02, 2023 at 03:35:30PM +0200, Michal Simek wrote:
>> From: Ashok Reddy Soma <ashok.reddy.soma@xilinx.com>
>>
>> As per design, all input/rx pins should have fast slew rate and 12mA
>> drive strength.
> 
> Why does the slow rate and drive strength matter for input pins ?

In design tools all inputs pins are setup like described by default.
That's why it could suggest that there is no need to describe default 
configuration in DT.
But all MIOs can be used as GPIOs where pinctrl can change their default values 
to something else. That's why setting up default values is to be safe even for 
input pins. I don't know HW details to that extend but that values can also 
change input behavior that's why having default is not a bad idea.

Maybe make sense to extend commit message to describe it better.

Thanks,
Michal
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso
index b610e65e0cdf..2f7a17ec58b4 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revA.dtso
@@ -2,7 +2,8 @@ 
 /*
  * dts file for KV260 revA Carrier Card
  *
- * (C) Copyright 2020 - 2021, Xilinx, Inc.
+ * (C) Copyright 2020 - 2022, Xilinx, Inc.
+ * (C) Copyright 2022 - 2023, Advanced Micro Devices, Inc.
  *
  * SD level shifter:
  * "A" – A01 board un-modified (NXP)
@@ -259,19 +260,22 @@  mux {
 	pinctrl_usb0_default: usb0-default {
 		conf {
 			groups = "usb0_0_grp";
-			slew-rate = <SLEW_RATE_SLOW>;
 			power-source = <IO_STANDARD_LVCMOS18>;
 		};
 
 		conf-rx {
 			pins = "MIO52", "MIO53", "MIO55";
 			bias-high-impedance;
+			drive-strength = <12>;
+			slew-rate = <SLEW_RATE_FAST>;
 		};
 
 		conf-tx {
 			pins = "MIO54", "MIO56", "MIO57", "MIO58", "MIO59",
 			"MIO60", "MIO61", "MIO62", "MIO63";
 			bias-disable;
+			drive-strength = <4>;
+			slew-rate = <SLEW_RATE_SLOW>;
 		};
 
 		mux {
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso
index a52dafbfd59e..4695e0e3714f 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-sck-kv-g-revB.dtso
@@ -2,7 +2,8 @@ 
 /*
  * dts file for KV260 revA Carrier Card
  *
- * (C) Copyright 2020 - 2021, Xilinx, Inc.
+ * (C) Copyright 2020 - 2022, Xilinx, Inc.
+ * (C) Copyright 2022 - 2023, Advanced Micro Devices, Inc.
  *
  * Michal Simek <michal.simek@xilinx.com>
  */
@@ -242,19 +243,22 @@  mux {
 	pinctrl_usb0_default: usb0-default {
 		conf {
 			groups = "usb0_0_grp";
-			slew-rate = <SLEW_RATE_SLOW>;
 			power-source = <IO_STANDARD_LVCMOS18>;
 		};
 
 		conf-rx {
 			pins = "MIO52", "MIO53", "MIO55";
 			bias-high-impedance;
+			drive-strength = <12>;
+			slew-rate = <SLEW_RATE_FAST>;
 		};
 
 		conf-tx {
 			pins = "MIO54", "MIO56", "MIO57", "MIO58", "MIO59",
 			"MIO60", "MIO61", "MIO62", "MIO63";
 			bias-disable;
+			drive-strength = <4>;
+			slew-rate = <SLEW_RATE_SLOW>;
 		};
 
 		mux {
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-zc1751-xm015-dc1.dts b/arch/arm64/boot/dts/xilinx/zynqmp-zc1751-xm015-dc1.dts
index f89ef2afcd9e..5fa9604f05d1 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-zc1751-xm015-dc1.dts
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-zc1751-xm015-dc1.dts
@@ -2,7 +2,8 @@ 
 /*
  * dts file for Xilinx ZynqMP zc1751-xm015-dc1
  *
- * (C) Copyright 2015 - 2021, Xilinx, Inc.
+ * (C) Copyright 2015 - 2022, Xilinx, Inc.
+ * (C) Copyright 2022 - 2023, Advanced Micro Devices, Inc.
  *
  * Michal Simek <michal.simek@xilinx.com>
  */
@@ -187,19 +188,22 @@  mux {
 
 		conf {
 			groups = "usb0_0_grp";
-			slew-rate = <SLEW_RATE_SLOW>;
 			power-source = <IO_STANDARD_LVCMOS18>;
 		};
 
 		conf-rx {
 			pins = "MIO52", "MIO53", "MIO55";
 			bias-high-impedance;
+			drive-strength = <12>;
+			slew-rate = <SLEW_RATE_FAST>;
 		};
 
 		conf-tx {
 			pins = "MIO54", "MIO56", "MIO57", "MIO58", "MIO59",
 			       "MIO60", "MIO61", "MIO62", "MIO63";
 			bias-disable;
+			drive-strength = <4>;
+			slew-rate = <SLEW_RATE_SLOW>;
 		};
 	};
 
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-zc1751-xm016-dc2.dts b/arch/arm64/boot/dts/xilinx/zynqmp-zc1751-xm016-dc2.dts
index 938b76bd0527..a2031187d9b3 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-zc1751-xm016-dc2.dts
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-zc1751-xm016-dc2.dts
@@ -2,7 +2,8 @@ 
 /*
  * dts file for Xilinx ZynqMP zc1751-xm016-dc2
  *
- * (C) Copyright 2015 - 2021, Xilinx, Inc.
+ * (C) Copyright 2015 - 2022, Xilinx, Inc.
+ * (C) Copyright 2022 - 2023, Advanced Micro Devices, Inc.
  *
  * Michal Simek <michal.simek@xilinx.com>
  */
@@ -281,19 +282,22 @@  mux {
 
 		conf {
 			groups = "usb1_0_grp";
-			slew-rate = <SLEW_RATE_SLOW>;
 			power-source = <IO_STANDARD_LVCMOS18>;
 		};
 
 		conf-rx {
 			pins = "MIO64", "MIO65", "MIO67";
 			bias-high-impedance;
+			drive-strength = <12>;
+			slew-rate = <SLEW_RATE_FAST>;
 		};
 
 		conf-tx {
 			pins = "MIO66", "MIO68", "MIO69", "MIO70", "MIO71",
 			       "MIO72", "MIO73", "MIO74", "MIO75";
 			bias-disable;
+			drive-strength = <4>;
+			slew-rate = <SLEW_RATE_SLOW>;
 		};
 	};
 
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dts b/arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dts
index c74bc3ff703b..2dd552cf51fb 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dts
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-zcu100-revC.dts
@@ -2,7 +2,8 @@ 
 /*
  * dts file for Xilinx ZynqMP ZCU100 revC
  *
- * (C) Copyright 2016 - 2021, Xilinx, Inc.
+ * (C) Copyright 2016 - 2022, Xilinx, Inc.
+ * (C) Copyright 2022 - 2023, Advanced Micro Devices, Inc.
  *
  * Michal Simek <michal.simek@xilinx.com>
  * Nathalie Chan King Choy
@@ -423,19 +424,22 @@  mux {
 
 		conf {
 			groups = "usb0_0_grp";
-			slew-rate = <SLEW_RATE_SLOW>;
 			power-source = <IO_STANDARD_LVCMOS18>;
 		};
 
 		conf-rx {
 			pins = "MIO52", "MIO53", "MIO55";
 			bias-high-impedance;
+			drive-strength = <12>;
+			slew-rate = <SLEW_RATE_FAST>;
 		};
 
 		conf-tx {
 			pins = "MIO54", "MIO56", "MIO57", "MIO58", "MIO59",
 			       "MIO60", "MIO61", "MIO62", "MIO63";
 			bias-disable;
+			drive-strength = <4>;
+			slew-rate = <SLEW_RATE_SLOW>;
 		};
 	};
 
@@ -447,19 +451,22 @@  mux {
 
 		conf {
 			groups = "usb1_0_grp";
-			slew-rate = <SLEW_RATE_SLOW>;
 			power-source = <IO_STANDARD_LVCMOS18>;
 		};
 
 		conf-rx {
 			pins = "MIO64", "MIO65", "MIO67";
 			bias-high-impedance;
+			drive-strength = <12>;
+			slew-rate = <SLEW_RATE_FAST>;
 		};
 
 		conf-tx {
 			pins = "MIO66", "MIO68", "MIO69", "MIO70", "MIO71",
 			       "MIO72", "MIO73", "MIO74", "MIO75";
 			bias-disable;
+			drive-strength = <4>;
+			slew-rate = <SLEW_RATE_SLOW>;
 		};
 	};
 };
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts b/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts
index c193579400cf..78043d9de7cc 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-zcu102-revA.dts
@@ -783,19 +783,22 @@  mux {
 
 		conf {
 			groups = "usb0_0_grp";
-			slew-rate = <SLEW_RATE_SLOW>;
 			power-source = <IO_STANDARD_LVCMOS18>;
 		};
 
 		conf-rx {
 			pins = "MIO52", "MIO53", "MIO55";
 			bias-high-impedance;
+			drive-strength = <12>;
+			slew-rate = <SLEW_RATE_FAST>;
 		};
 
 		conf-tx {
 			pins = "MIO54", "MIO56", "MIO57", "MIO58", "MIO59",
 			       "MIO60", "MIO61", "MIO62", "MIO63";
 			bias-disable;
+			drive-strength = <4>;
+			slew-rate = <SLEW_RATE_SLOW>;
 		};
 	};
 
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revA.dts b/arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revA.dts
index 11c1eaef9f53..c1779c88ec34 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revA.dts
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revA.dts
@@ -410,20 +410,22 @@  mux {
 
 		conf {
 			groups = "usb0_0_grp";
-			slew-rate = <SLEW_RATE_SLOW>;
 			power-source = <IO_STANDARD_LVCMOS18>;
-			drive-strength = <12>;
 		};
 
 		conf-rx {
 			pins = "MIO52", "MIO53", "MIO55";
 			bias-high-impedance;
+			drive-strength = <12>;
+			slew-rate = <SLEW_RATE_FAST>;
 		};
 
 		conf-tx {
 			pins = "MIO54", "MIO56", "MIO57", "MIO58", "MIO59",
 			       "MIO60", "MIO61", "MIO62", "MIO63";
 			bias-disable;
+			drive-strength = <4>;
+			slew-rate = <SLEW_RATE_SLOW>;
 		};
 	};
 };
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revC.dts b/arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revC.dts
index c06c138fa3e5..b857c1950496 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revC.dts
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-zcu104-revC.dts
@@ -422,20 +422,22 @@  mux {
 
 		conf {
 			groups = "usb0_0_grp";
-			slew-rate = <SLEW_RATE_SLOW>;
 			power-source = <IO_STANDARD_LVCMOS18>;
-			drive-strength = <12>;
 		};
 
 		conf-rx {
 			pins = "MIO52", "MIO53", "MIO55";
 			bias-high-impedance;
+			drive-strength = <12>;
+			slew-rate = <SLEW_RATE_FAST>;
 		};
 
 		conf-tx {
 			pins = "MIO54", "MIO56", "MIO57", "MIO58", "MIO59",
 			       "MIO60", "MIO61", "MIO62", "MIO63";
 			bias-disable;
+			drive-strength = <4>;
+			slew-rate = <SLEW_RATE_SLOW>;
 		};
 	};
 };
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-zcu106-revA.dts b/arch/arm64/boot/dts/xilinx/zynqmp-zcu106-revA.dts
index 52cdec33f190..e4e09afbdc1a 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-zcu106-revA.dts
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-zcu106-revA.dts
@@ -794,19 +794,22 @@  mux {
 
 		conf {
 			groups = "usb0_0_grp";
-			slew-rate = <SLEW_RATE_SLOW>;
 			power-source = <IO_STANDARD_LVCMOS18>;
 		};
 
 		conf-rx {
 			pins = "MIO52", "MIO53", "MIO55";
 			bias-high-impedance;
+			drive-strength = <12>;
+			slew-rate = <SLEW_RATE_FAST>;
 		};
 
 		conf-tx {
 			pins = "MIO54", "MIO56", "MIO57", "MIO58", "MIO59",
 			       "MIO60", "MIO61", "MIO62", "MIO63";
 			bias-disable;
+			drive-strength = <4>;
+			slew-rate = <SLEW_RATE_SLOW>;
 		};
 	};
 
diff --git a/arch/arm64/boot/dts/xilinx/zynqmp-zcu111-revA.dts b/arch/arm64/boot/dts/xilinx/zynqmp-zcu111-revA.dts
index 699cc9ce7898..791b2ac9fbdb 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp-zcu111-revA.dts
+++ b/arch/arm64/boot/dts/xilinx/zynqmp-zcu111-revA.dts
@@ -660,19 +660,22 @@  mux {
 
 		conf {
 			groups = "usb0_0_grp";
-			slew-rate = <SLEW_RATE_SLOW>;
 			power-source = <IO_STANDARD_LVCMOS18>;
 		};
 
 		conf-rx {
 			pins = "MIO52", "MIO53", "MIO55";
 			bias-high-impedance;
+			drive-strength = <12>;
+			slew-rate = <SLEW_RATE_FAST>;
 		};
 
 		conf-tx {
 			pins = "MIO54", "MIO56", "MIO57", "MIO58", "MIO59",
 			       "MIO60", "MIO61", "MIO62", "MIO63";
 			bias-disable;
+			drive-strength = <4>;
+			slew-rate = <SLEW_RATE_SLOW>;
 		};
 	};