mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 06:08:08 +00:00
793f8ab62c
Add kernel patches for version 6.1. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
97 lines
3.2 KiB
Diff
97 lines
3.2 KiB
Diff
From 4c64053e0646f66463bded712d7e6975757cf4c2 Mon Sep 17 00:00:00 2001
|
|
From: Maxime Ripard <maxime@cerno.tech>
|
|
Date: Tue, 20 Sep 2022 13:49:10 +0200
|
|
Subject: [PATCH] firmware: raspberrypi: Provide a helper to query a
|
|
clock max rate
|
|
|
|
The firmware allows to query for its clocks the operating range of a
|
|
given clock. We'll need this for some drivers (KMS, in particular) to
|
|
infer the state of some configuration options, so let's create a
|
|
function to do so.
|
|
|
|
Acked-by: Stephen Boyd <sboyd@kernel.org>
|
|
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
|
|
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
|
|
---
|
|
drivers/firmware/raspberrypi.c | 20 +++++++++++++++++
|
|
include/soc/bcm2835/raspberrypi-firmware.h | 26 ++++++++++++++++++++++
|
|
2 files changed, 46 insertions(+)
|
|
|
|
--- a/drivers/firmware/raspberrypi.c
|
|
+++ b/drivers/firmware/raspberrypi.c
|
|
@@ -342,6 +342,26 @@ static void rpi_register_clk_driver(stru
|
|
-1, NULL, 0);
|
|
}
|
|
|
|
+unsigned int rpi_firmware_clk_get_max_rate(struct rpi_firmware *fw, unsigned int id)
|
|
+{
|
|
+ struct rpi_firmware_clk_rate_request msg =
|
|
+ RPI_FIRMWARE_CLK_RATE_REQUEST(id);
|
|
+ int ret;
|
|
+
|
|
+ ret = rpi_firmware_property(fw, RPI_FIRMWARE_GET_MAX_CLOCK_RATE,
|
|
+ &msg, sizeof(msg));
|
|
+ if (ret)
|
|
+ /*
|
|
+ * If our firmware doesn't support that operation, or fails, we
|
|
+ * assume the maximum clock rate is absolute maximum we can
|
|
+ * store over our type.
|
|
+ */
|
|
+ return UINT_MAX;
|
|
+
|
|
+ return le32_to_cpu(msg.rate);
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(rpi_firmware_clk_get_max_rate);
|
|
+
|
|
static void rpi_firmware_delete(struct kref *kref)
|
|
{
|
|
struct rpi_firmware *fw = container_of(kref, struct rpi_firmware,
|
|
--- a/include/soc/bcm2835/raspberrypi-firmware.h
|
|
+++ b/include/soc/bcm2835/raspberrypi-firmware.h
|
|
@@ -181,12 +181,32 @@ enum rpi_firmware_clk_id {
|
|
|
|
#define GET_DISPLAY_SETTINGS_PAYLOAD_SIZE 64
|
|
|
|
+/**
|
|
+ * struct rpi_firmware_clk_rate_request - Firmware Request for a rate
|
|
+ * @id: ID of the clock being queried
|
|
+ * @rate: Rate in Hertz. Set by the firmware.
|
|
+ *
|
|
+ * Used by @RPI_FIRMWARE_GET_CLOCK_RATE, @RPI_FIRMWARE_GET_CLOCK_MEASURED,
|
|
+ * @RPI_FIRMWARE_GET_MAX_CLOCK_RATE and @RPI_FIRMWARE_GET_MIN_CLOCK_RATE.
|
|
+ */
|
|
+struct rpi_firmware_clk_rate_request {
|
|
+ __le32 id;
|
|
+ __le32 rate;
|
|
+} __packed;
|
|
+
|
|
+#define RPI_FIRMWARE_CLK_RATE_REQUEST(_id) \
|
|
+ { \
|
|
+ .id = _id, \
|
|
+ }
|
|
+
|
|
#if IS_ENABLED(CONFIG_RASPBERRYPI_FIRMWARE)
|
|
int rpi_firmware_property(struct rpi_firmware *fw,
|
|
u32 tag, void *data, size_t len);
|
|
int rpi_firmware_property_list(struct rpi_firmware *fw,
|
|
void *data, size_t tag_size);
|
|
void rpi_firmware_put(struct rpi_firmware *fw);
|
|
+unsigned int rpi_firmware_clk_get_max_rate(struct rpi_firmware *fw,
|
|
+ unsigned int id);
|
|
struct device_node *rpi_firmware_find_node(void);
|
|
struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node);
|
|
struct rpi_firmware *devm_rpi_firmware_get(struct device *dev,
|
|
@@ -206,6 +226,12 @@ static inline int rpi_firmware_property_
|
|
|
|
static inline void rpi_firmware_put(struct rpi_firmware *fw) { }
|
|
|
|
+static inline unsigned int rpi_firmware_clk_get_max_rate(struct rpi_firmware *fw,
|
|
+ unsigned int id)
|
|
+{
|
|
+ return UINT_MAX;
|
|
+}
|
|
+
|
|
static inline struct device_node *rpi_firmware_find_node(void)
|
|
{
|
|
return NULL;
|