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, 67 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0524-clk-bcm-rpi-Add-DT-provider-for-the-clocks.patch b/target/linux/bcm27xx/patches-5.4/950-0524-clk-bcm-rpi-Add-DT-provider-for-the-clocks.patch
new file mode 100644
index 0000000000..99fdf8fbd6
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0524-clk-bcm-rpi-Add-DT-provider-for-the-clocks.patch
@@ -0,0 +1,67 @@
+From 19f7515528fbd1dc0d45e4b5ce6531c1406fc8d8 Mon Sep 17 00:00:00 2001
+From: Maxime Ripard <maxime@cerno.tech>
+Date: Fri, 7 Feb 2020 17:03:46 +0100
+Subject: [PATCH] clk: bcm: rpi: Add DT provider for the clocks
+
+For the upcoming registration of the clocks provided by the firmware, make
+sure it's exposed to the device tree providers.
+
+Cc: Michael Turquette <mturquette@baylibre.com>
+Cc: linux-clk@vger.kernel.org
+Reviewed-by: Stephen Boyd <sboyd@kernel.org>
+Signed-off-by: Maxime Ripard <maxime@cerno.tech>
+---
+ drivers/clk/bcm/clk-raspberrypi.c | 16 ++++++++++++++++
+ 1 file changed, 16 insertions(+)
+
+--- a/drivers/clk/bcm/clk-raspberrypi.c
++++ b/drivers/clk/bcm/clk-raspberrypi.c
+@@ -31,6 +31,8 @@
+ 
+ #define A2W_PLL_FRAC_BITS		20
+ 
++#define NUM_FW_CLKS			16
++
+ struct raspberrypi_clk {
+ 	struct device *dev;
+ 	struct rpi_firmware *firmware;
+@@ -285,11 +287,13 @@ static struct clk_hw *raspberrypi_regist
+ 
+ static int raspberrypi_clk_probe(struct platform_device *pdev)
+ {
++	struct clk_hw_onecell_data *clk_data;
+ 	struct device_node *firmware_node;
+ 	struct device *dev = &pdev->dev;
+ 	struct rpi_firmware *firmware;
+ 	struct raspberrypi_clk *rpi;
+ 	struct clk_hw *hw;
++	int ret;
+ 
+ 	firmware_node = of_parse_phandle(dev->of_node, "raspberrypi,firmware", 0);
+ 	if (!firmware_node) {
+@@ -309,6 +313,11 @@ static int raspberrypi_clk_probe(struct
+ 	rpi->firmware = firmware;
+ 	platform_set_drvdata(pdev, rpi);
+ 
++	clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, NUM_FW_CLKS),
++				GFP_KERNEL);
++	if (!clk_data)
++		return -ENOMEM;
++
+ 	hw = raspberrypi_register_pllb(rpi);
+ 	if (IS_ERR(hw)) {
+ 		dev_err(dev, "Failed to initialize pllb, %ld\n", PTR_ERR(hw));
+@@ -318,6 +327,13 @@ static int raspberrypi_clk_probe(struct
+ 	hw = raspberrypi_register_pllb_arm(rpi);
+ 	if (IS_ERR(hw))
+ 		return PTR_ERR(hw);
++	clk_data->hws[RPI_FIRMWARE_ARM_CLK_ID] = hw;
++	clk_data->num = RPI_FIRMWARE_ARM_CLK_ID + 1;
++
++	ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
++					  clk_data);
++	if (ret)
++		return ret;
+ 
+ 	rpi->cpufreq = platform_device_register_data(dev, "raspberrypi-cpufreq",
+ 						     -1, NULL, 0);