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, 43 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0782-clk-rpi-Only-register-a-few-firmware-clocks.patch b/target/linux/bcm27xx/patches-5.4/950-0782-clk-rpi-Only-register-a-few-firmware-clocks.patch
new file mode 100644
index 0000000000..580a90c9d3
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0782-clk-rpi-Only-register-a-few-firmware-clocks.patch
@@ -0,0 +1,43 @@
+From 73a8443ea82fef7a1f8a466fff83da7863baed49 Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime@cerno.tech>
+Date: Wed, 10 Jun 2020 16:18:17 +0200
+Subject: [PATCH] clk: rpi: Only register a few firmware clocks
+
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+---
+ drivers/clk/bcm/clk-raspberrypi.c | 25 ++++++++++++++++++-------
+ 1 file changed, 18 insertions(+), 7 deletions(-)
+
+--- a/drivers/clk/bcm/clk-raspberrypi.c
++++ b/drivers/clk/bcm/clk-raspberrypi.c
+@@ -268,13 +268,24 @@ static int raspberrypi_discover_clocks(s
+ 	while (clks->id) {
+ 		struct clk_hw *hw;
+ 
+-		hw = raspberrypi_clk_register(rpi, clks->parent, clks->id);
+-		if (IS_ERR(hw))
+-			return PTR_ERR(hw);
++		switch (clks->id) {
++		case RPI_FIRMWARE_ARM_CLK_ID:
++		case RPI_FIRMWARE_CORE_CLK_ID:
++		case RPI_FIRMWARE_M2MC_CLK_ID:
++		case RPI_FIRMWARE_V3D_CLK_ID:
++			hw = raspberrypi_clk_register(rpi, clks->parent,
++						      clks->id);
++			if (IS_ERR(hw))
++				return PTR_ERR(hw);
+ 
+-		data->hws[clks->id] = hw;
+-		data->num = clks->id + 1;
+-		clks++;
++			data->hws[clks->id] = hw;
++			data->num = clks->id + 1;
++			fallthrough;
++
++		default:
++			clks++;
++			break;
++		}
+ 	}
+ 
+ 	return 0;