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77 lines
2.6 KiB
Diff
77 lines
2.6 KiB
Diff
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From 7069072c10f54de136613947a5b82f504e5f8478 Mon Sep 17 00:00:00 2001
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From: "maxime@cerno.tech" <maxime@cerno.tech>
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Date: Thu, 20 Oct 2022 11:12:09 +0200
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Subject: [PATCH] firmware: raspberrypi: Introduce
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rpi_firmware_find_node()
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A significant number of RaspberryPi drivers using the firmware don't
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have a phandle to it, so end up scanning the device tree to find a node
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with the firmware compatible.
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That code is duplicated everywhere, so let's introduce a helper instead.
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Link: https://lore.kernel.org/r/20220815-rpi-fix-4k-60-v4-1-a1b40526df3e@cerno.tech
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Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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---
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drivers/firmware/raspberrypi.c | 18 ++++++++++++------
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include/soc/bcm2835/raspberrypi-firmware.h | 7 +++++++
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2 files changed, 19 insertions(+), 6 deletions(-)
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--- a/drivers/firmware/raspberrypi.c
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+++ b/drivers/firmware/raspberrypi.c
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@@ -429,6 +429,18 @@ static int rpi_firmware_remove(struct pl
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return 0;
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}
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+static const struct of_device_id rpi_firmware_of_match[] = {
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+ { .compatible = "raspberrypi,bcm2835-firmware", },
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+ {},
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+};
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+MODULE_DEVICE_TABLE(of, rpi_firmware_of_match);
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+
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+struct device_node *rpi_firmware_find_node(void)
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+{
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+ return of_find_matching_node(NULL, rpi_firmware_of_match);
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+}
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+EXPORT_SYMBOL_GPL(rpi_firmware_find_node);
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+
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/**
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* rpi_firmware_get - Get pointer to rpi_firmware structure.
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* @firmware_node: Pointer to the firmware Device Tree node.
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@@ -484,12 +496,6 @@ struct rpi_firmware *devm_rpi_firmware_g
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}
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EXPORT_SYMBOL_GPL(devm_rpi_firmware_get);
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-static const struct of_device_id rpi_firmware_of_match[] = {
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- { .compatible = "raspberrypi,bcm2835-firmware", },
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- {},
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-};
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-MODULE_DEVICE_TABLE(of, rpi_firmware_of_match);
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-
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static struct platform_driver rpi_firmware_driver = {
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.driver = {
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.name = "raspberrypi-firmware",
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--- a/include/soc/bcm2835/raspberrypi-firmware.h
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+++ b/include/soc/bcm2835/raspberrypi-firmware.h
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@@ -168,6 +168,7 @@ int rpi_firmware_property(struct rpi_fir
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int rpi_firmware_property_list(struct rpi_firmware *fw,
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void *data, size_t tag_size);
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void rpi_firmware_put(struct rpi_firmware *fw);
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+struct device_node *rpi_firmware_find_node(void);
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struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node);
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struct rpi_firmware *devm_rpi_firmware_get(struct device *dev,
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struct device_node *firmware_node);
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@@ -185,6 +186,12 @@ static inline int rpi_firmware_property_
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}
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static inline void rpi_firmware_put(struct rpi_firmware *fw) { }
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+
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+static inline struct device_node *rpi_firmware_find_node(void)
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+{
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+ return NULL;
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+}
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+
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static inline struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node)
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{
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return NULL;
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