diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-4.19/950-0793-Initialise-rpi-firmware-before-clk-bcm2835.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-4.19/950-0793-Initialise-rpi-firmware-before-clk-bcm2835.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-4.19/950-0793-Initialise-rpi-firmware-before-clk-bcm2835.patch b/target/linux/bcm27xx/patches-4.19/950-0793-Initialise-rpi-firmware-before-clk-bcm2835.patch new file mode 100644 index 0000000000..3a68193506 --- /dev/null +++ b/target/linux/bcm27xx/patches-4.19/950-0793-Initialise-rpi-firmware-before-clk-bcm2835.patch @@ -0,0 +1,47 @@ +From 43551a95378230b8d062e107e012573739af2bf1 Mon Sep 17 00:00:00 2001 +From: Luke Hinds <7058938+lukehinds@users.noreply.github.com> +Date: Wed, 22 Jan 2020 16:03:00 +0000 +Subject: [PATCH] Initialise rpi-firmware before clk-bcm2835 + +The IMA (Integrity Measurement Architecture) looks for a TPM (Trusted +Platform Module) having been registered when it initialises; otherwise +it assumes there is no TPM. It has been observed on BCM2835 that IMA +is initialised before TPM, and that initialising the BCM2835 clock +driver before the firmware driver has the effect of reversing this +order. + +Change the firmware driver to initialise at core_initcall, delaying the +BCM2835 clock driver to postcore_initcall. + +See: https://github.com/raspberrypi/linux/issues/3291 + https://github.com/raspberrypi/linux/pull/3297 + +Signed-off-by: Luke Hinds <lhinds@redhat.com> +Co-authored-by: Phil Elwell <phil@raspberrypi.org> +--- + drivers/clk/bcm/clk-bcm2835.c | 2 +- + drivers/firmware/raspberrypi.c | 2 +- + 2 files changed, 2 insertions(+), 2 deletions(-) + +--- a/drivers/clk/bcm/clk-bcm2835.c ++++ b/drivers/clk/bcm/clk-bcm2835.c +@@ -2388,7 +2388,7 @@ static int __init __bcm2835_clk_driver_i + { + return platform_driver_register(&bcm2835_clk_driver); + } +-core_initcall(__bcm2835_clk_driver_init); ++postcore_initcall(__bcm2835_clk_driver_init); + + MODULE_AUTHOR("Eric Anholt <eric@anholt.net>"); + MODULE_DESCRIPTION("BCM2835 clock driver"); +--- a/drivers/firmware/raspberrypi.c ++++ b/drivers/firmware/raspberrypi.c +@@ -404,7 +404,7 @@ out2: + out1: + return ret; + } +-subsys_initcall(rpi_firmware_init); ++core_initcall(rpi_firmware_init); + + static void __init rpi_firmware_exit(void) + { |