ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/target/linux/layerscape/patches-5.4/701-net-0224-bus-fsl-mc-add-autorescan-sysfs.patch b/target/linux/layerscape/patches-5.4/701-net-0224-bus-fsl-mc-add-autorescan-sysfs.patch
new file mode 100644
index 0000000..6128e7d
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/701-net-0224-bus-fsl-mc-add-autorescan-sysfs.patch
@@ -0,0 +1,157 @@
+From 02e92b21edb4df7285f27ea5f0403377dcabe22d Mon Sep 17 00:00:00 2001
+From: Ioana Ciornei <ioana.ciornei@nxp.com>
+Date: Tue, 29 Oct 2019 22:48:55 +0200
+Subject: [PATCH] bus: fsl-mc: add autorescan sysfs
+
+Add the autorescan sysfs in order to enable/disable the DPRC IRQs on
+which automatic rescan of the bus is performed. This is important when
+dynamic creation of objects is needed to happen in a timely manner because
+object creation can be bundled together.
+
+Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
+---
+ drivers/bus/fsl-mc/dprc-driver.c | 17 ++++++++++--
+ drivers/bus/fsl-mc/fsl-mc-bus.c | 55 +++++++++++++++++++++++++++++++++++++
+ drivers/bus/fsl-mc/fsl-mc-private.h | 4 +++
+ include/linux/fsl/mc.h | 1 +
+ 4 files changed, 75 insertions(+), 2 deletions(-)
+
+--- a/drivers/bus/fsl-mc/dprc-driver.c
++++ b/drivers/bus/fsl-mc/dprc-driver.c
+@@ -484,8 +484,9 @@ out:
+ /*
+ * Disable and clear interrupt for a given DPRC object
+ */
+-static int disable_dprc_irq(struct fsl_mc_device *mc_dev)
++int disable_dprc_irq(struct fsl_mc_device *mc_dev)
+ {
++ struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
+ int error;
+ struct fsl_mc_io *mc_io = mc_dev->mc_io;
+
+@@ -522,9 +523,18 @@ static int disable_dprc_irq(struct fsl_m
+ return error;
+ }
+
++ mc_bus->irq_enabled = 0;
++
+ return 0;
+ }
+
++int get_dprc_irq_state(struct fsl_mc_device *mc_dev)
++{
++ struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
++
++ return mc_bus->irq_enabled;
++}
++
+ static int register_dprc_irq_handler(struct fsl_mc_device *mc_dev)
+ {
+ int error;
+@@ -551,8 +561,9 @@ static int register_dprc_irq_handler(str
+ return 0;
+ }
+
+-static int enable_dprc_irq(struct fsl_mc_device *mc_dev)
++int enable_dprc_irq(struct fsl_mc_device *mc_dev)
+ {
++ struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
+ int error;
+
+ /*
+@@ -580,6 +591,8 @@ static int enable_dprc_irq(struct fsl_mc
+ return error;
+ }
+
++ mc_bus->irq_enabled = 1;
++
+ return 0;
+ }
+
+--- a/drivers/bus/fsl-mc/fsl-mc-bus.c
++++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
+@@ -237,8 +237,63 @@ static ssize_t rescan_store(struct bus_t
+ }
+ static BUS_ATTR_WO(rescan);
+
++static int fsl_mc_bus_set_autorescan(struct device *dev, void *data)
++{
++ struct fsl_mc_device *root_mc_dev;
++ unsigned long val;
++ char *buf = data;
++
++ if (!fsl_mc_is_root_dprc(dev))
++ goto exit;
++
++ root_mc_dev = to_fsl_mc_device(dev);
++
++ if (kstrtoul(buf, 0, &val) < 0)
++ return -EINVAL;
++
++ if (val)
++ enable_dprc_irq(root_mc_dev);
++ else
++ disable_dprc_irq(root_mc_dev);
++
++exit:
++ return 0;
++}
++
++static int fsl_mc_bus_get_autorescan(struct device *dev, void *data)
++{
++ struct fsl_mc_device *root_mc_dev;
++ char *buf = data;
++
++ if (!fsl_mc_is_root_dprc(dev))
++ goto exit;
++
++ root_mc_dev = to_fsl_mc_device(dev);
++
++ sprintf(buf, "%d\n", get_dprc_irq_state(root_mc_dev));
++exit:
++ return 0;
++}
++
++static ssize_t autorescan_store(struct bus_type *bus,
++ const char *buf, size_t count)
++{
++ bus_for_each_dev(bus, NULL, (void *)buf, fsl_mc_bus_set_autorescan);
++
++ return count;
++}
++
++static ssize_t autorescan_show(struct bus_type *bus, char *buf)
++{
++ bus_for_each_dev(bus, NULL, (void *)buf, fsl_mc_bus_get_autorescan);
++ return strlen(buf);
++}
++
++static BUS_ATTR_RW(autorescan);
++
+ static struct attribute *fsl_mc_bus_attrs[] = {
+ &bus_attr_rescan.attr,
++ &bus_attr_autorescan.attr,
+ NULL,
+ };
+
+--- a/drivers/bus/fsl-mc/fsl-mc-private.h
++++ b/drivers/bus/fsl-mc/fsl-mc-private.h
+@@ -203,4 +203,8 @@ static inline void fsl_mc_uapi_remove_de
+
+ #endif
+
++int disable_dprc_irq(struct fsl_mc_device *mc_dev);
++int enable_dprc_irq(struct fsl_mc_device *mc_dev);
++int get_dprc_irq_state(struct fsl_mc_device *mc_dev);
++
+ #endif /* _FSL_MC_PRIVATE_H_ */
+--- a/include/linux/fsl/mc.h
++++ b/include/linux/fsl/mc.h
+@@ -1006,6 +1006,7 @@ struct fsl_mc_bus {
+ struct mutex scan_mutex; /* serializes bus scanning */
+ struct dprc_attributes dprc_attr;
+ struct fsl_mc_uapi uapi_misc;
++ int irq_enabled;
+ };
+
+ int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev,