2022-05-16 21:40:32 +00:00
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From 02b606fbd70b9226e851d969828a1499cb7869bf Mon Sep 17 00:00:00 2001
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From: Luke Hinds <7058938+lukehinds@users.noreply.github.com>
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Date: Wed, 22 Jan 2020 16:03:00 +0000
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Subject: [PATCH] Initialise rpi-firmware before clk-bcm2835
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The IMA (Integrity Measurement Architecture) looks for a TPM (Trusted
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Platform Module) having been registered when it initialises; otherwise
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it assumes there is no TPM. It has been observed on BCM2835 that IMA
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is initialised before TPM, and that initialising the BCM2835 clock
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driver before the firmware driver has the effect of reversing this
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order.
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Change the firmware driver to initialise at core_initcall, delaying the
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BCM2835 clock driver to postcore_initcall.
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See: https://github.com/raspberrypi/linux/issues/3291
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https://github.com/raspberrypi/linux/pull/3297
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Signed-off-by: Luke Hinds <lhinds@redhat.com>
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Co-authored-by: Phil Elwell <phil@raspberrypi.org>
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---
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drivers/clk/bcm/clk-bcm2835.c | 2 +-
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drivers/firmware/raspberrypi.c | 2 +-
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2 files changed, 2 insertions(+), 2 deletions(-)
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--- a/drivers/clk/bcm/clk-bcm2835.c
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+++ b/drivers/clk/bcm/clk-bcm2835.c
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2022-10-26 22:31:12 +00:00
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@@ -2454,7 +2454,7 @@ static int __init __bcm2835_clk_driver_i
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2022-05-16 21:40:32 +00:00
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{
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return platform_driver_register(&bcm2835_clk_driver);
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}
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-core_initcall(__bcm2835_clk_driver_init);
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+postcore_initcall(__bcm2835_clk_driver_init);
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MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
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MODULE_DESCRIPTION("BCM2835 clock driver");
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--- a/drivers/firmware/raspberrypi.c
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+++ b/drivers/firmware/raspberrypi.c
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@@ -498,7 +498,7 @@ out2:
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out1:
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return ret;
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}
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-subsys_initcall(rpi_firmware_init);
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+core_initcall(rpi_firmware_init);
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static void __init rpi_firmware_exit(void)
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{
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