From a1383655cfaa71609d6236ae0fcf3b6047462b98 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=81lvaro=20Fern=C3=A1ndez=20Rojas?= Date: Sat, 29 Feb 2020 09:25:20 +0100 Subject: bcm27xx: add linux 5.4 support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Tested on bcm2710 (Raspberry Pi 3B). Signed-off-by: Álvaro Fernández Rojas --- ...spberrypi-Add-backward-compatible-get_thr.patch | 79 ++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 target/linux/bcm27xx/patches-5.4/950-0123-firmware-raspberrypi-Add-backward-compatible-get_thr.patch (limited to 'target/linux/bcm27xx/patches-5.4/950-0123-firmware-raspberrypi-Add-backward-compatible-get_thr.patch') diff --git a/target/linux/bcm27xx/patches-5.4/950-0123-firmware-raspberrypi-Add-backward-compatible-get_thr.patch b/target/linux/bcm27xx/patches-5.4/950-0123-firmware-raspberrypi-Add-backward-compatible-get_thr.patch new file mode 100644 index 0000000000..6049c55acb --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0123-firmware-raspberrypi-Add-backward-compatible-get_thr.patch @@ -0,0 +1,79 @@ +From e92a49b3761de2ba8422ee634dac5998625574e4 Mon Sep 17 00:00:00 2001 +From: Stefan Wahren +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 +--- + drivers/firmware/raspberrypi.c | 33 +++++++++++++++++++++++++++++++++ + 1 file changed, 33 insertions(+) + +--- a/drivers/firmware/raspberrypi.c ++++ b/drivers/firmware/raspberrypi.c +@@ -28,6 +28,7 @@ struct rpi_firmware { + struct mbox_chan *chan; /* The property channel. */ + struct completion c; + u32 enabled; ++ u32 get_throttled; + }; + + static struct platform_device *g_pdev; +@@ -174,6 +175,12 @@ 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); +@@ -198,6 +205,27 @@ 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) + { +@@ -230,6 +258,11 @@ 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 void rpi_register_clk_driver(struct device *dev) -- cgit v1.2.3