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, 56 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0512-clk-bcm-rpi-Use-clk_hw_register-for-pllb_arm.patch b/target/linux/bcm27xx/patches-5.4/950-0512-clk-bcm-rpi-Use-clk_hw_register-for-pllb_arm.patch
new file mode 100644
index 0000000000..55f86ae340
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0512-clk-bcm-rpi-Use-clk_hw_register-for-pllb_arm.patch
@@ -0,0 +1,56 @@
+From 3a4163613b7f6e628e7b5a0d3a546523d1d03bb7 Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime@cerno.tech>
+Date: Fri, 7 Feb 2020 15:40:00 +0100
+Subject: [PATCH] clk: bcm: rpi: Use clk_hw_register for pllb_arm
+
+The pllb_arm clock is defined as a fixed factor clock with the pllb clock
+as a parent. However, all its configuration is entirely static, and thus we
+don't really need to call clk_hw_register_fixed_factor() but can simply call
+clk_hw_register() with a static clk_fixed_factor structure.
+
+Cc: Michael Turquette <mturquette@baylibre.com>
+Cc: linux-clk@vger.kernel.org
+Acked-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
+Reviewed-by: Stephen Boyd <sboyd@kernel.org>
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+---
+ drivers/clk/bcm/clk-raspberrypi.c | 24 ++++++++++++++++++------
+ 1 file changed, 18 insertions(+), 6 deletions(-)
+
+--- a/drivers/clk/bcm/clk-raspberrypi.c
++++ b/drivers/clk/bcm/clk-raspberrypi.c
+@@ -225,16 +225,28 @@ static int raspberrypi_register_pllb(str
+ 	return devm_clk_hw_register(rpi->dev, &rpi->pllb);
+ }
+ 
++static struct clk_fixed_factor raspberrypi_clk_pllb_arm = {
++	.mult = 1,
++	.div = 2,
++	.hw.init = &(struct clk_init_data) {
++		.name		= "pllb_arm",
++		.parent_names	= (const char *[]){ "pllb" },
++		.num_parents	= 1,
++		.ops		= &clk_fixed_factor_ops,
++		.flags		= CLK_SET_RATE_PARENT | CLK_GET_RATE_NOCACHE,
++	},
++};
++
+ static int raspberrypi_register_pllb_arm(struct raspberrypi_clk *rpi)
+ {
+-	rpi->pllb_arm = clk_hw_register_fixed_factor(rpi->dev,
+-				"pllb_arm", "pllb",
+-				CLK_SET_RATE_PARENT | CLK_GET_RATE_NOCACHE,
+-				1, 2);
+-	if (IS_ERR(rpi->pllb_arm)) {
++	int ret;
++
++	ret = clk_hw_register(rpi->dev, &raspberrypi_clk_pllb_arm.hw);
++	if (ret) {
+ 		dev_err(rpi->dev, "Failed to initialize pllb_arm\n");
+-		return PTR_ERR(rpi->pllb_arm);
++		return ret;
+ 	}
++	rpi->pllb_arm = &raspberrypi_clk_pllb_arm.hw;
+ 
+ 	rpi->pllb_arm_lookup = clkdev_hw_create(rpi->pllb_arm, NULL, "cpu0");
+ 	if (!rpi->pllb_arm_lookup) {