69 lines
2.2 KiB
Diff
69 lines
2.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
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Date: Sun, 16 May 2021 19:48:54 +0200
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Subject: soc: amlogic: meson-mx-socinfo: Add support for the TrustZone
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firmware
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When the TrustZone firmware is enabled the SoC is configured so the boot
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ROM cannot be read from the (untrusted) Linux kernel. Instead a firmware
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call needs to be used to get the SoC's "misc" version.
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Add support for the firmware call to retrieve the SoC's misc version if
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the TrustZone firmware is loaded.
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Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
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---
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drivers/soc/amlogic/meson-mx-socinfo.c | 23 ++++++----
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1 file changed, 15 insertions(+), 8 deletions(-)
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diff --git a/drivers/soc/amlogic/meson-mx-socinfo.c b/drivers/soc/amlogic/meson-mx-socinfo.c
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index 111111111111..222222222222 100644
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--- a/drivers/soc/amlogic/meson-mx-socinfo.c
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+++ b/drivers/soc/amlogic/meson-mx-socinfo.c
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@@ -4,6 +4,7 @@
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* SPDX-License-Identifier: GPL-2.0+
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*/
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+#include <linux/firmware/meson/meson_mx_trustzone.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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@@ -118,10 +119,12 @@ static int __init meson_mx_socinfo_init(void)
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if (IS_ERR(assist_regmap))
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return PTR_ERR(assist_regmap);
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- bootrom_regmap =
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- syscon_regmap_lookup_by_compatible("amlogic,meson-mx-bootrom");
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- if (IS_ERR(bootrom_regmap))
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- return PTR_ERR(bootrom_regmap);
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+ if (!meson_mx_trustzone_firmware_available()) {
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+ bootrom_regmap =
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+ syscon_regmap_lookup_by_compatible("amlogic,meson-mx-bootrom");
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+ if (IS_ERR(bootrom_regmap))
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+ return PTR_ERR(bootrom_regmap);
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+ }
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np = of_find_matching_node(NULL, meson_mx_socinfo_analog_top_ids);
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if (np) {
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@@ -141,10 +144,14 @@ static int __init meson_mx_socinfo_init(void)
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if (ret < 0)
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return ret;
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- ret = regmap_read(bootrom_regmap, MESON_MX_BOOTROM_MISC_VER,
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- &misc_ver);
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- if (ret < 0)
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- return ret;
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+ if (meson_mx_trustzone_firmware_available()) {
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+ misc_ver = meson_mx_trustzone_read_soc_rev1();
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+ } else {
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+ ret = regmap_read(bootrom_regmap, MESON_MX_BOOTROM_MISC_VER,
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+ &misc_ver);
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+ if (ret < 0)
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+ return ret;
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+ }
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soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
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if (!soc_dev_attr)
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--
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Armbian
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