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[v2,15/35] ACPI / property: Support strings in Apple _DSM props

Message ID 20220104072658.69756-16-marcan@marcan.st (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series brcmfmac: Support Apple T2 and M1 platforms | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch

Commit Message

Hector Martin Jan. 4, 2022, 7:26 a.m. UTC 
The Wi-Fi module in Apple machines has a "module-instance" device
property that specifies the platform type and is used for firmware
selection. Its value is a string, so add support for string values in
acpi_extract_apple_properties().

Reviewed-by: Lukas Wunner <lukas@wunner.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Hector Martin <marcan@marcan.st>
---
 drivers/acpi/x86/apple.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/acpi/x86/apple.c b/drivers/acpi/x86/apple.c
index c285c91a5e9c..71b8f103ab0f 100644
--- a/drivers/acpi/x86/apple.c
+++ b/drivers/acpi/x86/apple.c
@@ -70,13 +70,16 @@  void acpi_extract_apple_properties(struct acpi_device *adev)
 
 		if ( key->type != ACPI_TYPE_STRING ||
 		    (val->type != ACPI_TYPE_INTEGER &&
-		     val->type != ACPI_TYPE_BUFFER))
+		     val->type != ACPI_TYPE_BUFFER &&
+		     val->type != ACPI_TYPE_STRING))
 			continue; /* skip invalid properties */
 
 		__set_bit(i, valid);
 		newsize += key->string.length + 1;
 		if ( val->type == ACPI_TYPE_BUFFER)
 			newsize += val->buffer.length;
+		else if (val->type == ACPI_TYPE_STRING)
+			newsize += val->string.length + 1;
 	}
 
 	numvalid = bitmap_weight(valid, numprops);
@@ -118,6 +121,12 @@  void acpi_extract_apple_properties(struct acpi_device *adev)
 		newprops[v].type = val->type;
 		if (val->type == ACPI_TYPE_INTEGER) {
 			newprops[v].integer.value = val->integer.value;
+		} else if (val->type == ACPI_TYPE_STRING) {
+			newprops[v].string.length = val->string.length;
+			newprops[v].string.pointer = free_space;
+			memcpy(free_space, val->string.pointer,
+			       val->string.length);
+			free_space += val->string.length + 1;
 		} else {
 			newprops[v].buffer.length = val->buffer.length;
 			newprops[v].buffer.pointer = free_space;