From d79db5f8ea7613c85beb42e2f2c20b780cd9dd83 Mon Sep 17 00:00:00 2001
From: John Klug <john.klug@multitech.com>
Date: Mon, 1 Nov 2021 11:43:12 -0500
Subject: output-high and output-low are ignored by pinctrl_at91 driver

---
 .../mtcdt/linux-4.9-mtcdt-device-tree.patch        | 24 +++++++++++-----------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/linux-4.9-mtcdt-device-tree.patch b/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/linux-4.9-mtcdt-device-tree.patch
index fff3d85..481ab6d 100644
--- a/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/linux-4.9-mtcdt-device-tree.patch
+++ b/recipes-kernel/linux/linux-at91-4.9.87/mtcdt/linux-4.9-mtcdt-device-tree.patch
@@ -1,6 +1,6 @@
 diff -Naru orig/arch/arm/boot/dts/mtcdt.dts new/arch/arm/boot/dts/mtcdt.dts
 --- orig/arch/arm/boot/dts/mtcdt.dts	1969-12-31 18:00:00.000000000 -0600
-+++ new/arch/arm/boot/dts/mtcdt.dts	2021-10-21 06:40:53.695663469 -0500
++++ new/arch/arm/boot/dts/mtcdt.dts	2021-11-01 11:34:34.531175268 -0500
 @@ -0,0 +1,315 @@
 +/*
 + * DTS file for Multi-Tech Systems MTCDT Hardware
@@ -54,23 +54,25 @@ diff -Naru orig/arch/arm/boot/dts/mtcdt.dts new/arch/arm/boot/dts/mtcdt.dts
 +                };
 +                mts-io {
 +		     pinctrl_mts_io_out: mts_io-0 {
++                      // gpio4 and gpio5 are reset in at91bootstrap. They should not be touched in Linux.
 +                      atmel,pins =
-+                          <AT91_PIOD 14 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP    /* PD14 WiFi BT reset */
-+                          AT91_PIOD 16 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP     /* PD16 Secure reset */
-+                          AT91_PIOD 17 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP     /* PD17 MTQ reset */
-+                          AT91_PIOD 18 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP>;   /* PD18 USB Hub reset */
-+                      output-high;
++                          <AT91_PIOD 14 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(1))    /* PD14 WiFi BT reset */
++                          AT91_PIOD 16 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(1))     /* PD16 Secure reset or gpio4 reset */
++                          AT91_PIOD 17 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(1))     /* PD17 MTQ reset */
++                          AT91_PIOD 18 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(1))>;   /* PD18 USB Hub reset */
++                      output-high; // ignored by at91_pinctrl
 +		    };
 +		    pinctrl_mts_io_in: mts_io-1 {
 +                      atmel,pins =
 +                          <AT91_PIOD 19 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP   /* PD19 GNSS Int */
 +                          AT91_PIOD 20 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP>;   /* PD20 WiFi_BT_LPMode Input */
 +		    };
++		    // GNSS kept in reset to prevent EXAR from hanging
 +		    pinctrl_mts_io_gnss: mts_io-2 {
 +                      atmel,pins =
-+			   <AT91_PIOC 4 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP      /* PC16 ETH_NRST */
-+                          AT91_PIOD 15 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP>;   /* PD15 N_GNSS_RESET */
-+                      output-low;
++			<AT91_PIOC 4 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(0))     /* PC16 ETH_NRST */
++                        AT91_PIOD 15 AT91_PERIPH_GPIO (AT91_PINCTRL_OUTPUT|AT91_PINCTRL_OUTPUT_VAL(0))>;   /* PD15 N_GNSS_RESET */
++                      output-low; // ignored by at91_pinctrl
 +		    };
 +               };
 +
@@ -312,9 +314,7 @@ diff -Naru orig/arch/arm/boot/dts/mtcdt.dts new/arch/arm/boot/dts/mtcdt.dts
 +	status = "okay";
 +	compatible = "mts,mts-io";
 +	pinctrl-names = "default";
-+	pinctrl-0 = <&pinctrl_mts_io_out>;
-+	pinctrl-1 = <&pinctrl_mts_io_in>;
-+	pinctrl-2 = <&pinctrl_mts_io_gnss>;
++	pinctrl-0 = <&pinctrl_mts_io_out>, <&pinctrl_mts_io_in>, <&pinctrl_mts_io_gnss>;
 +    };
 +};
 Index: linux-4.9/arch/arm/boot/dts/at91sam9x5cm.dtsi
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