bcm27xx: import latest patches from the RPi foundation

bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 167 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0759-Add-Micro-Crystal-RV-1805-to-i2c-rtc-overlays.patch b/target/linux/bcm27xx/patches-5.4/950-0759-Add-Micro-Crystal-RV-1805-to-i2c-rtc-overlays.patch
new file mode 100644
index 0000000000..6e9951bd4a
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0759-Add-Micro-Crystal-RV-1805-to-i2c-rtc-overlays.patch
@@ -0,0 +1,167 @@
+From 8c16d549cd0b9e9cf890ac3ead5d58d92590140f Mon Sep 17 00:00:00 2001
+From: "Kevin P. Fleming" <kevin+linux@km6g.us>
+Date: Mon, 1 Jun 2020 07:02:00 -0400
+Subject: [PATCH] Add Micro Crystal RV-1805 to i2c-rtc overlays
+
+While the RV-1805 is supported by the rtc-abx80x driver via
+auto-detection, in order for it to be initialized properly
+it must be explcitly selected.
+
+Signed-off-by: Kevin P. Fleming <kevin+linux@km6g.us>
+---
+ arch/arm/boot/dts/overlays/README             | 12 +++++---
+ .../dts/overlays/i2c-rtc-gpio-overlay.dts     | 28 ++++++++++++++++---
+ .../arm/boot/dts/overlays/i2c-rtc-overlay.dts | 27 ++++++++++++++++--
+ 3 files changed, 56 insertions(+), 11 deletions(-)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -1196,6 +1196,8 @@ Params: abx80x                  Select o
+ 
+         pcf8563                 Select the PCF8563 device
+ 
++        rv1805                  Select the Micro Crystal RV1805 device
++
+         rv3028                  Select the Micro Crystal RV3028 device
+ 
+         addr                    Sets the address for the RTC. Note that the
+@@ -1203,10 +1205,10 @@ Params: abx80x                  Select o
+                                 address.
+ 
+         trickle-diode-type      Diode type for trickle charge - "standard" or
+-                                "schottky" (ABx80x only)
++                                "schottky" (ABx80x and RV1805 only)
+ 
+         trickle-resistor-ohms   Resistor value for trickle charge (DS1339,
+-                                ABx80x, RV3028)
++                                ABx80x, RV1805, RV3028)
+ 
+         wakeup-source           Specify that the RTC can be used as a wakeup
+                                 source
+@@ -1243,6 +1245,8 @@ Params: abx80x                  Select o
+ 
+         pcf8563                 Select the PCF8563 device
+ 
++        rv1805                  Select the Micro Crystal RV1805 device
++
+         rv3028                  Select the Micro Crystal RV3028 device
+ 
+         addr                    Sets the address for the RTC. Note that the
+@@ -1250,10 +1254,10 @@ Params: abx80x                  Select o
+                                 address.
+ 
+         trickle-diode-type      Diode type for trickle charge - "standard" or
+-                                "schottky" (ABx80x only)
++                                "schottky" (ABx80x and RV1805 only)
+ 
+         trickle-resistor-ohms   Resistor value for trickle charge (DS1339,
+-                                ABx80x, RV3028)
++                                ABx80x, RV1805, RV3028)
+ 
+         wakeup-source           Specify that the RTC can be used as a wakeup
+                                 source
+--- a/arch/arm/boot/dts/overlays/i2c-rtc-gpio-overlay.dts
++++ b/arch/arm/boot/dts/overlays/i2c-rtc-gpio-overlay.dts
+@@ -204,6 +204,23 @@
+ 		};
+ 	};
+ 
++	fragment@13 {
++		target = <&i2c_gpio>;
++		__dormant__ {
++			#address-cells = <1>;
++			#size-cells = <0>;
++			status = "okay";
++
++			rv1805: rv1805@69 {
++				compatible = "microcrystal,rv1805";
++				reg = <0x69>;
++				abracon,tc-diode = "standard";
++				abracon,tc-resistor = <0>;
++				status = "okay";
++			};
++		};
++	};
++
+ 	__overrides__ {
+ 		abx80x = <0>,"+1";
+ 		ds1307 = <0>,"+2";
+@@ -217,6 +234,7 @@
+ 		m41t62 = <0>,"+10";
+ 		rv3028 = <0>,"+11";
+ 		pcf2129 = <0>,"+12";
++		rv1805 = <0>,"+13";
+ 
+ 		addr = <&abx80x>, "reg:0",
+ 		       <&ds1307>, "reg:0",
+@@ -226,12 +244,14 @@
+ 		       <&mcp7941x>, "reg:0",
+ 		       <&pcf8523>, "reg:0",
+ 		       <&pcf8563>, "reg:0",
+-		       <&m41t62>, "reg:0";
+-
+-		trickle-diode-type = <&abx80x>,"abracon,tc-diode";
++		       <&m41t62>, "reg:0",
++		       <&rv1805>, "reg:0";
++		trickle-diode-type = <&abx80x>,"abracon,tc-diode",
++				     <&rv1805>,"abracon,tc-diode";
+ 		trickle-resistor-ohms = <&ds1339>,"trickle-resistor-ohms:0",
+ 					<&abx80x>,"abracon,tc-resistor:0",
+-					<&rv3028>,"trickle-resistor-ohms:0";
++					<&rv3028>,"trickle-resistor-ohms:0",
++					<&rv1805>,"abracon,tc-resistor:0";
+ 		backup-switchover-mode = <&rv3028>,"backup-switchover-mode:0";
+ 		wakeup-source = <&ds1339>,"wakeup-source?",
+ 				<&ds3231>,"wakeup-source?",
+--- a/arch/arm/boot/dts/overlays/i2c-rtc-overlay.dts
++++ b/arch/arm/boot/dts/overlays/i2c-rtc-overlay.dts
+@@ -203,6 +203,23 @@
+ 		};
+ 	};
+ 
++	fragment@13 {
++		target = <&i2c_arm>;
++		__dormant__ {
++			#address-cells = <1>;
++			#size-cells = <0>;
++			status = "okay";
++
++			rv1805: rv1805@69 {
++				compatible = "microcrystal,rv1805";
++				reg = <0x69>;
++				abracon,tc-diode = "standard";
++				abracon,tc-resistor = <0>;
++				status = "okay";
++			};
++		};
++	};
++
+ 	__overrides__ {
+ 		abx80x = <0>,"+0";
+ 		ds1307 = <0>,"+1";
+@@ -217,6 +234,7 @@
+ 		rv3028 = <0>,"+10";
+ 		pcf2129 = <0>,"+11";
+ 		pcf85363 = <0>,"+12";
++		rv1805 = <0>,"+13";
+ 
+ 		addr = <&abx80x>, "reg:0",
+ 		       <&ds1307>, "reg:0",
+@@ -226,11 +244,14 @@
+ 		       <&mcp7941x>, "reg:0",
+ 		       <&pcf8523>, "reg:0",
+ 		       <&pcf8563>, "reg:0",
+-		       <&m41t62>, "reg:0";
+-		trickle-diode-type = <&abx80x>,"abracon,tc-diode";
++		       <&m41t62>, "reg:0",
++		       <&rv1805>, "reg:0";
++		trickle-diode-type = <&abx80x>,"abracon,tc-diode",
++				     <&rv1805>,"abracon,tc-diode";
+ 		trickle-resistor-ohms = <&ds1339>,"trickle-resistor-ohms:0",
+ 					<&abx80x>,"abracon,tc-resistor:0",
+-					<&rv3028>,"trickle-resistor-ohms:0";
++					<&rv3028>,"trickle-resistor-ohms:0",
++					<&rv1805>,"abracon,tc-resistor:0";
+ 		backup-switchover-mode = <&rv3028>,"backup-switchover-mode:0";
+ 		wakeup-source = <&ds1339>,"wakeup-source?",
+ 				<&ds3231>,"wakeup-source?",