From 2a12187d5853d9fd5102278cecef7dac7c8ce7ea Mon Sep 17 00:00:00 2001
From: Andreas Rammhold <andreas@rammhold.de>
Date: Fri, 23 Dec 2022 12:27:47 +0100
Subject: [PATCH 1/4] of/fdt: run soc memory setup when
early_init_dt_scan_memory fails
If memory has been found early_init_dt_scan_memory now returns 1. If
it hasn't found any memory it will return 0, allowing other memory
setup mechanisms to carry on.
Previously early_init_dt_scan_memory always returned 0 without
distinguishing between any kind of memory setup being done or not. Any
code path after the early_init_dt_scan memory call in the ramips
plat_mem_setup code wouldn't be executed anymore. Making
early_init_dt_scan_memory the only way to initialize the memory.
Some boards, including my mt7621 based Cudy X6 board, depend on memory
initialization being done via the soc_info.mem_detect function
pointer. Those wouldn't be able to obtain memory and panic the kernel
during early bootup with the message "early_init_dt_alloc_memory_arch:
Failed to allocate 12416 bytes align=0x40".
Fixes: 1f012283e936 ("of/fdt: Rework early_init_dt_scan_memory() to call directly")
Cc: stable@vger.kernel.org
Signed-off-by: Andreas Rammhold <andreas@rammhold.de>
Link: https://lore.kernel.org/r/20221223112748.2935235-1-andreas@rammhold.de
Signed-off-by: Rob Herring <robh@kernel.org>
---
arch/mips/ralink/of.c | 2 +-
drivers/of/fdt.c | 6 ++++--
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/mips/ralink/of.c b/arch/mips/ralink/of.c
index 01c132bc33d54..4d06de77d92a6 100644
--- a/arch/mips/ralink/of.c
+++ b/arch/mips/ralink/of.c
@@ -64,7 +64,7 @@ void __init plat_mem_setup(void)
dtb = get_fdt();
__dt_setup_arch(dtb);
- if (!early_init_dt_scan_memory())
+ if (early_init_dt_scan_memory())
return;
if (soc_info.mem_detect)
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index b2272bccf85c9..02cc4a285cb98 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -1099,7 +1099,7 @@ u64 __init dt_mem_next_cell(int s, const __be32 **cellp)
*/
int __init early_init_dt_scan_memory(void)
{
- int node;
+ int node, found_memory = 0;
const void *fdt = initial_boot_params;
fdt_for_each_subnode(node, fdt, 0) {
@@ -1139,6 +1139,8 @@ int __init early_init_dt_scan_memory(void)
early_init_dt_add_memory_arch(base, size);
+ found_memory = 1;
+
if (!hotpluggable)
continue;
@@ -1147,7 +1149,7 @@ int __init early_init_dt_scan_memory(void)
base, base + size);
}
}
- return 0;
+ return found_memory;
}
int __init early_init_dt_scan_chosen(char *cmdline)
From 1d7a4a40bf76e2305c8beed4a019bf58af6121ac Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Date: Fri, 23 Dec 2022 14:21:59 +0100
Subject: [PATCH 2/4] dt-bindings: soundwire: qcom,soundwire: correct sizes
related to number of ports
There are several properties depending on number of ports. Some of them
had maximum limit of 5 and some of 8. SM8450 AudioReach comes with 8
ports, so fix the limits:
sm8450-sony-xperia-nagara-pdx224.dtb: soundwire-controller@3250000: qcom,ports-word-length: 'oneOf' conditional failed, one must be fixed:
[[255, 255, 255, 255, 255, 255, 255, 255]] is too short
[255, 255, 255, 255, 255, 255, 255, 255] is too long
Fixes: febc50b82bc9 ("dt-bindings: soundwire: Convert text bindings to DT Schema")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221223132159.81211-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
.../devicetree/bindings/soundwire/qcom,soundwire.yaml | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/Documentation/devicetree/bindings/soundwire/qcom,soundwire.yaml b/Documentation/devicetree/bindings/soundwire/qcom,soundwire.yaml
index bcbfa71536cda..3efdc192ab019 100644
--- a/Documentation/devicetree/bindings/soundwire/qcom,soundwire.yaml
+++ b/Documentation/devicetree/bindings/soundwire/qcom,soundwire.yaml
@@ -80,7 +80,7 @@ properties:
or applicable for the respective data port.
More info in MIPI Alliance SoundWire 1.0 Specifications.
minItems: 3
- maxItems: 5
+ maxItems: 8
qcom,ports-sinterval-low:
$ref: /schemas/types.yaml#/definitions/uint8-array
@@ -124,7 +124,7 @@ properties:
or applicable for the respective data port.
More info in MIPI Alliance SoundWire 1.0 Specifications.
minItems: 3
- maxItems: 5
+ maxItems: 8
qcom,ports-block-pack-mode:
$ref: /schemas/types.yaml#/definitions/uint8-array
@@ -154,7 +154,7 @@ properties:
or applicable for the respective data port.
More info in MIPI Alliance SoundWire 1.0 Specifications.
minItems: 3
- maxItems: 5
+ maxItems: 8
items:
oneOf:
- minimum: 0
@@ -171,7 +171,7 @@ properties:
or applicable for the respective data port.
More info in MIPI Alliance SoundWire 1.0 Specifications.
minItems: 3
- maxItems: 5
+ maxItems: 8
items:
oneOf:
- minimum: 0
@@ -187,7 +187,7 @@ properties:
or applicable for the respective data port.
More info in MIPI Alliance SoundWire 1.0 Specifications.
minItems: 3
- maxItems: 5
+ maxItems: 8
items:
oneOf:
- minimum: 0
From bd0ddcfc83d85bc30c868f2c3457312c7f1ccee2 Mon Sep 17 00:00:00 2001
From: Rob Herring <robh@kernel.org>
Date: Tue, 3 Jan 2023 12:00:31 -0600
Subject: [PATCH 3/4] Revert "of: fdt: Honor CONFIG_CMDLINE* even without
/chosen node"
This reverts commit a7d550f82b445cf218b47a2c1a9c56e97ecb8c7a.
Some arches (PPC at least) don't call early_init_dt_scan_nodes(), so
moving the cmdline processing there breaks them.
Reported-by: Geoff Levand <geoff@infradead.org>
Cc: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Tested-by: Geoff Levand <geoff@infradead.org>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Link: https://lore.kernel.org/r/20230103-dt-cmdline-fix-v1-1-7038e88b18b6@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
drivers/of/fdt.c | 40 ++++++++++++++++++++--------------------
1 file changed, 20 insertions(+), 20 deletions(-)
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 02cc4a285cb98..4f88e8bbdd279 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -1175,6 +1175,26 @@ int __init early_init_dt_scan_chosen(char *cmdline)
if (p != NULL && l > 0)
strscpy(cmdline, p, min(l, COMMAND_LINE_SIZE));
+ /*
+ * CONFIG_CMDLINE is meant to be a default in case nothing else
+ * managed to set the command line, unless CONFIG_CMDLINE_FORCE
+ * is set in which case we override whatever was found earlier.
+ */
+#ifdef CONFIG_CMDLINE
+#if defined(CONFIG_CMDLINE_EXTEND)
+ strlcat(cmdline, " ", COMMAND_LINE_SIZE);
+ strlcat(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+#elif defined(CONFIG_CMDLINE_FORCE)
+ strscpy(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+#else
+ /* No arguments from boot loader, use kernel's cmdl*/
+ if (!((char *)cmdline)[0])
+ strscpy(cmdline, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+#endif
+#endif /* CONFIG_CMDLINE */
+
+ pr_debug("Command line is: %s\n", (char *)cmdline);
+
rng_seed = of_get_flat_dt_prop(node, "rng-seed", &l);
if (rng_seed && l > 0) {
add_bootloader_randomness(rng_seed, l);
@@ -1279,26 +1299,6 @@ void __init early_init_dt_scan_nodes(void)
if (rc)
pr_warn("No chosen node found, continuing without\n");
- /*
- * CONFIG_CMDLINE is meant to be a default in case nothing else
- * managed to set the command line, unless CONFIG_CMDLINE_FORCE
- * is set in which case we override whatever was found earlier.
- */
-#ifdef CONFIG_CMDLINE
-#if defined(CONFIG_CMDLINE_EXTEND)
- strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
- strlcat(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
-#elif defined(CONFIG_CMDLINE_FORCE)
- strscpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
-#else
- /* No arguments from boot loader, use kernel's cmdl */
- if (!boot_command_line[0])
- strscpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
-#endif
-#endif /* CONFIG_CMDLINE */
-
- pr_debug("Command line is: %s\n", boot_command_line);
-
/* Setup memory, calling early_init_dt_add_memory_arch */
early_init_dt_scan_memory();
From 064e32dc5b03114d0767893fecdaf7b5dfd8c286 Mon Sep 17 00:00:00 2001
From: Rob Herring <robh@kernel.org>
Date: Tue, 3 Jan 2023 12:00:32 -0600
Subject: [PATCH 4/4] of: fdt: Honor CONFIG_CMDLINE* even without /chosen node,
take 2
I do not read a strict requirement on /chosen node in either ePAPR or in
Documentation/devicetree. Help text for CONFIG_CMDLINE and
CONFIG_CMDLINE_EXTEND doesn't make their behavior explicitly dependent on
the presence of /chosen or the presense of /chosen/bootargs.
However the early check for /chosen and bailing out in
early_init_dt_scan_chosen() skips CONFIG_CMDLINE handling which is not
really related to /chosen node or the particular method of passing cmdline
from bootloader.
This leads to counterintuitive combinations (assuming
CONFIG_CMDLINE_EXTEND=y):
a) bootargs="foo", CONFIG_CMDLINE="bar" => cmdline=="foo bar"
b) /chosen missing, CONFIG_CMDLINE="bar" => cmdline==""
c) bootargs="", CONFIG_CMDLINE="bar" => cmdline==" bar"
Rework early_init_dt_scan_chosen() so that the cmdline config options are
always handled.
[commit msg written by Alexander Sverdlin]
Cc: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Tested-by: Geoff Levand <geoff@infradead.org>
Reviewed-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Link: https://lore.kernel.org/r/20230103-dt-cmdline-fix-v1-2-7038e88b18b6@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
drivers/of/fdt.c | 28 +++++++++++++++-------------
1 file changed, 15 insertions(+), 13 deletions(-)
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 4f88e8bbdd279..f08b25195ae79 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -1163,18 +1163,32 @@ int __init early_init_dt_scan_chosen(char *cmdline)
if (node < 0)
node = fdt_path_offset(fdt, "/chosen@0");
if (node < 0)
- return -ENOENT;
+ /* Handle the cmdline config options even if no /chosen node */
+ goto handle_cmdline;
chosen_node_offset = node;
early_init_dt_check_for_initrd(node);
early_init_dt_check_for_elfcorehdr(node);
+ rng_seed = of_get_flat_dt_prop(node, "rng-seed", &l);
+ if (rng_seed && l > 0) {
+ add_bootloader_randomness(rng_seed, l);
+
+ /* try to clear seed so it won't be found. */
+ fdt_nop_property(initial_boot_params, node, "rng-seed");
+
+ /* update CRC check value */
+ of_fdt_crc32 = crc32_be(~0, initial_boot_params,
+ fdt_totalsize(initial_boot_params));
+ }
+
/* Retrieve command line */
p = of_get_flat_dt_prop(node, "bootargs", &l);
if (p != NULL && l > 0)
strscpy(cmdline, p, min(l, COMMAND_LINE_SIZE));
+handle_cmdline:
/*
* CONFIG_CMDLINE is meant to be a default in case nothing else
* managed to set the command line, unless CONFIG_CMDLINE_FORCE
@@ -1195,18 +1209,6 @@ int __init early_init_dt_scan_chosen(char *cmdline)
pr_debug("Command line is: %s\n", (char *)cmdline);
- rng_seed = of_get_flat_dt_prop(node, "rng-seed", &l);
- if (rng_seed && l > 0) {
- add_bootloader_randomness(rng_seed, l);
-
- /* try to clear seed so it won't be found. */
- fdt_nop_property(initial_boot_params, node, "rng-seed");
-
- /* update CRC check value */
- of_fdt_crc32 = crc32_be(~0, initial_boot_params,
- fdt_totalsize(initial_boot_params));
- }
-
return 0;
}