From a4dd91006d4fdbd5c0f32e48eb7babc98ebc37f2 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 Co-authored-by: Phil Elwell --- 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 @@ -2424,7 +2424,7 @@ 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 "); MODULE_DESCRIPTION("BCM2835 clock driver"); --- a/drivers/firmware/raspberrypi.c +++ b/drivers/firmware/raspberrypi.c @@ -468,7 +468,7 @@ out2: out1: return ret; } -subsys_initcall(rpi_firmware_init); +core_initcall(rpi_firmware_init); static void __init rpi_firmware_exit(void) {