diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0132-bus-fsl-mc-add-root-dprc-rescan-attribute.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0132-bus-fsl-mc-add-root-dprc-rescan-attribute.patch | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0132-bus-fsl-mc-add-root-dprc-rescan-attribute.patch b/target/linux/layerscape/patches-5.4/701-net-0132-bus-fsl-mc-add-root-dprc-rescan-attribute.patch new file mode 100644 index 0000000000..76e547714f --- /dev/null +++ b/target/linux/layerscape/patches-5.4/701-net-0132-bus-fsl-mc-add-root-dprc-rescan-attribute.patch @@ -0,0 +1,100 @@ +From 64bd4f6f266110d908e51787a81ed0bc9d325941 Mon Sep 17 00:00:00 2001 +From: Ioana Ciornei <ioana.ciornei@nxp.com> +Date: Mon, 5 Mar 2018 18:37:32 +0200 +Subject: [PATCH] bus: fsl-mc: add root dprc rescan attribute + +Introduce the rescan attribute as a device attribute to +synchronize the fsl-mc bus objects and the MC firmware. + +To rescan the root dprc only, e.g. +echo 1 > /sys/bus/fsl-mc/devices/dprc.1/rescan + +Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com> +--- + Documentation/ABI/stable/sysfs-bus-fsl-mc | 9 ++++++++ + MAINTAINERS | 1 + + drivers/bus/fsl-mc/dprc-driver.c | 36 +++++++++++++++++++++++++++++++ + 3 files changed, 46 insertions(+) + create mode 100644 Documentation/ABI/stable/sysfs-bus-fsl-mc + +--- /dev/null ++++ b/Documentation/ABI/stable/sysfs-bus-fsl-mc +@@ -0,0 +1,9 @@ ++What: /sys/bus/fsl-mc/devices/dprc.*/rescan ++Date: November 2018 ++KernelVersion: 5.0 ++Contact: Ioana Ciornei <ioana.ciornei@nxp.com> ++Description: Writing a non-zero value to this attribute will ++ force a rescan of dprc.X container in the system and ++ synchronize the objects under dprc.X and the ++ Management Complex firmware. ++Users: Userspace drivers and management tools +--- a/MAINTAINERS ++++ b/MAINTAINERS +@@ -13438,6 +13438,7 @@ F: Documentation/devicetree/bindings/mis + F: Documentation/networking/device_drivers/freescale/dpaa2/overview.rst + F: Documentation/networking/dpaa2/overview.rst + F: include/uapi/linux/fsl_mc.h ++F: Documentation/ABI/stable/sysfs-bus-fsl-mc + + QT1010 MEDIA DRIVER + M: Antti Palosaari <crope@iki.fi> +--- a/drivers/bus/fsl-mc/dprc-driver.c ++++ b/drivers/bus/fsl-mc/dprc-driver.c +@@ -354,6 +354,33 @@ static int dprc_scan_container(struct fs + return 0; + } + ++static ssize_t rescan_store(struct device *dev, ++ struct device_attribute *attr, ++ const char *buf, size_t count) ++{ ++ struct fsl_mc_device *root_mc_dev; ++ struct fsl_mc_bus *root_mc_bus; ++ unsigned long val; ++ ++ if (!fsl_mc_is_root_dprc(dev)) ++ return -EINVAL; ++ ++ root_mc_dev = to_fsl_mc_device(dev); ++ root_mc_bus = to_fsl_mc_bus(root_mc_dev); ++ ++ if (kstrtoul(buf, 0, &val) < 0) ++ return -EINVAL; ++ ++ if (val) { ++ mutex_lock(&root_mc_bus->scan_mutex); ++ dprc_scan_objects(root_mc_dev, NULL); ++ mutex_unlock(&root_mc_bus->scan_mutex); ++ } ++ ++ return count; ++} ++static DEVICE_ATTR_WO(rescan); ++ + /** + * dprc_irq0_handler - Regular ISR for DPRC interrupt 0 + * +@@ -692,6 +719,13 @@ static int dprc_probe(struct fsl_mc_devi + + mutex_init(&mc_bus->scan_mutex); + ++ error = device_create_file(&mc_dev->dev, &dev_attr_rescan); ++ if (error < 0) { ++ dev_err(&mc_dev->dev, "device_create_file() failed: %d\n", ++ error); ++ goto error_cleanup_open; ++ } ++ + /* + * Discover MC objects in DPRC object: + */ +@@ -788,6 +822,8 @@ static int dprc_remove(struct fsl_mc_dev + fsl_mc_uapi_remove_device_file(mc_bus); + } + ++ device_remove_file(&mc_dev->dev, &dev_attr_rescan); ++ + dev_info(&mc_dev->dev, "DPRC device unbound from driver"); + return 0; + } |