diff options
Diffstat (limited to 'target/linux/layerscape/patches-4.4/7190-staging-fsl-mc-root-dprc-rescan-attribute-to-sync-ke.patch')
| -rw-r--r-- | target/linux/layerscape/patches-4.4/7190-staging-fsl-mc-root-dprc-rescan-attribute-to-sync-ke.patch | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-4.4/7190-staging-fsl-mc-root-dprc-rescan-attribute-to-sync-ke.patch b/target/linux/layerscape/patches-4.4/7190-staging-fsl-mc-root-dprc-rescan-attribute-to-sync-ke.patch new file mode 100644 index 0000000000..a38907b0bd --- /dev/null +++ b/target/linux/layerscape/patches-4.4/7190-staging-fsl-mc-root-dprc-rescan-attribute-to-sync-ke.patch @@ -0,0 +1,59 @@ +From 75b607ff8725eac74f3375b3370f7d121d1827a3 Mon Sep 17 00:00:00 2001 +From: Lijun Pan <Lijun.Pan@freescale.com> +Date: Mon, 8 Feb 2016 17:40:14 -0600 +Subject: [PATCH 190/226] staging: fsl-mc: root dprc rescan attribute to sync + kernel with MC + +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: Lijun Pan <Lijun.Pan@freescale.com> +[Stuart: resolved merge conflict] +Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com> +--- + drivers/staging/fsl-mc/bus/mc-bus.c | 29 +++++++++++++++++++++++++++++ + 1 file changed, 29 insertions(+) + +--- a/drivers/staging/fsl-mc/bus/mc-bus.c ++++ b/drivers/staging/fsl-mc/bus/mc-bus.c +@@ -96,8 +96,37 @@ static ssize_t modalias_show(struct devi + } + static DEVICE_ATTR_RO(modalias); + ++static ssize_t rescan_store(struct device *dev, ++ struct device_attribute *attr, ++ const char *buf, size_t count) ++{ ++ unsigned long val; ++ unsigned int irq_count; ++ struct fsl_mc_device *root_mc_dev; ++ struct fsl_mc_bus *root_mc_bus; ++ ++ 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, &irq_count); ++ mutex_unlock(&root_mc_bus->scan_mutex); ++ } ++ ++ return count; ++} ++static DEVICE_ATTR_WO(rescan); ++ + static struct attribute *fsl_mc_dev_attrs[] = { + &dev_attr_modalias.attr, ++ &dev_attr_rescan.attr, + NULL, + }; + |