diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0137-firmware-raspberrypi-Add-backward-compatible-get_thr.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0137-firmware-raspberrypi-Add-backward-compatible-get_thr.patch | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0137-firmware-raspberrypi-Add-backward-compatible-get_thr.patch b/target/linux/brcm2708/patches-4.19/950-0137-firmware-raspberrypi-Add-backward-compatible-get_thr.patch new file mode 100644 index 0000000000..24803abb29 --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0137-firmware-raspberrypi-Add-backward-compatible-get_thr.patch @@ -0,0 +1,79 @@ +From 4c26452ecee989e1f43a80654a0d5cd8ce64e49e Mon Sep 17 00:00:00 2001 +From: Stefan Wahren <stefan.wahren@i2se.com> +Date: Sat, 13 Oct 2018 13:31:21 +0200 +Subject: [PATCH] firmware: raspberrypi: Add backward compatible + get_throttled + +Avoid a hard userspace ABI change by adding a compatible get_throttled +sysfs entry. Its value is now feed by the GET_THROTTLED requests of the +new hwmon driver. The first access to get_throttled will generate +a warning. + +Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> +--- + drivers/firmware/raspberrypi.c | 33 +++++++++++++++++++++++++++++++++ + 1 file changed, 33 insertions(+) + +--- a/drivers/firmware/raspberrypi.c ++++ b/drivers/firmware/raspberrypi.c +@@ -30,6 +30,7 @@ struct rpi_firmware { + struct mbox_chan *chan; /* The property channel. */ + struct completion c; + u32 enabled; ++ u32 get_throttled; + }; + + static struct platform_device *g_pdev; +@@ -172,6 +173,12 @@ int rpi_firmware_property(struct rpi_fir + + kfree(data); + ++ if ((tag == RPI_FIRMWARE_GET_THROTTLED) && ++ memcmp(&fw->get_throttled, tag_data, sizeof(fw->get_throttled))) { ++ memcpy(&fw->get_throttled, tag_data, sizeof(fw->get_throttled)); ++ sysfs_notify(&fw->cl.dev->kobj, NULL, "get_throttled"); ++ } ++ + return ret; + } + EXPORT_SYMBOL_GPL(rpi_firmware_property); +@@ -196,6 +203,27 @@ static int rpi_firmware_notify_reboot(st + return 0; + } + ++static ssize_t get_throttled_show(struct device *dev, ++ struct device_attribute *attr, char *buf) ++{ ++ struct rpi_firmware *fw = dev_get_drvdata(dev); ++ ++ WARN_ONCE(1, "deprecated, use hwmon sysfs instead\n"); ++ ++ return sprintf(buf, "%x\n", fw->get_throttled); ++} ++ ++static DEVICE_ATTR_RO(get_throttled); ++ ++static struct attribute *rpi_firmware_dev_attrs[] = { ++ &dev_attr_get_throttled.attr, ++ NULL, ++}; ++ ++static const struct attribute_group rpi_firmware_dev_group = { ++ .attrs = rpi_firmware_dev_attrs, ++}; ++ + static void + rpi_firmware_print_firmware_revision(struct rpi_firmware *fw) + { +@@ -228,6 +256,11 @@ rpi_register_hwmon_driver(struct device + + rpi_hwmon = platform_device_register_data(dev, "raspberrypi-hwmon", + -1, NULL, 0); ++ ++ if (!IS_ERR_OR_NULL(rpi_hwmon)) { ++ if (devm_device_add_group(dev, &rpi_firmware_dev_group)) ++ dev_err(dev, "Failed to create get_trottled attr\n"); ++ } + } + + static int rpi_firmware_probe(struct platform_device *pdev) |