bcm27xx: add linux 5.4 support

Tested on bcm2710 (Raspberry Pi 3B).

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

1 files changed, 83 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0052-firmware-bcm2835-Support-ARCH_BCM270x.patch b/target/linux/bcm27xx/patches-5.4/950-0052-firmware-bcm2835-Support-ARCH_BCM270x.patch
new file mode 100644
index 0000000000..a561e589db
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0052-firmware-bcm2835-Support-ARCH_BCM270x.patch
@@ -0,0 +1,83 @@
+From 3e01b7e87a6164aaf4e89eacb4f4462a6c19a1fb Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
+Date: Fri, 26 Jun 2015 14:25:01 +0200
+Subject: [PATCH] firmware: bcm2835: Support ARCH_BCM270x
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Support booting without Device Tree.
+Turn on USB power.
+Load driver early because of lacking support for deferred probing
+in many drivers.
+
+Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
+
+firmware: bcm2835: Don't turn on USB power
+
+The raspberrypi-power driver is now used to turn on USB power.
+
+This partly reverts commit:
+firmware: bcm2835: Support ARCH_BCM270x
+
+Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
+---
+ drivers/firmware/raspberrypi.c | 19 +++++++++++++++++--
+ 1 file changed, 17 insertions(+), 2 deletions(-)
+
+--- a/drivers/firmware/raspberrypi.c
++++ b/drivers/firmware/raspberrypi.c
+@@ -29,6 +29,8 @@ struct rpi_firmware {
+ 	u32 enabled;
+ };
+ 
++static struct platform_device *g_pdev;
++
+ static DEFINE_MUTEX(transaction_lock);
+ 
+ static void response_callback(struct mbox_client *cl, void *msg)
+@@ -238,6 +240,7 @@ static int rpi_firmware_probe(struct pla
+ 	init_completion(&fw->c);
+ 
+ 	platform_set_drvdata(pdev, fw);
++	g_pdev = pdev;
+ 
+ 	rpi_firmware_print_firmware_revision(fw);
+ 	rpi_register_hwmon_driver(dev, fw);
+@@ -265,6 +268,7 @@ static int rpi_firmware_remove(struct pl
+ 	platform_device_unregister(rpi_clk);
+ 	rpi_clk = NULL;
+ 	mbox_free_channel(fw->chan);
++	g_pdev = NULL;
+ 
+ 	return 0;
+ }
+@@ -277,7 +281,7 @@ static int rpi_firmware_remove(struct pl
+  */
+ struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node)
+ {
+-	struct platform_device *pdev = of_find_device_by_node(firmware_node);
++	struct platform_device *pdev = g_pdev;
+ 
+ 	if (!pdev)
+ 		return NULL;
+@@ -301,7 +305,18 @@ static struct platform_driver rpi_firmwa
+ 	.shutdown	= rpi_firmware_shutdown,
+ 	.remove		= rpi_firmware_remove,
+ };
+-module_platform_driver(rpi_firmware_driver);
++
++static int __init rpi_firmware_init(void)
++{
++	return platform_driver_register(&rpi_firmware_driver);
++}
++subsys_initcall(rpi_firmware_init);
++
++static void __init rpi_firmware_exit(void)
++{
++	platform_driver_unregister(&rpi_firmware_driver);
++}
++module_exit(rpi_firmware_exit);
+ 
+ MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
+ MODULE_DESCRIPTION("Raspberry Pi firmware driver");