diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/701-net-0224-bus-fsl-mc-add-autorescan-sysfs.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/701-net-0224-bus-fsl-mc-add-autorescan-sysfs.patch | 157 |
1 files changed, 157 insertions, 0 deletions
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 0000000000..6128e7d0b4 --- /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, |