1 From 02e92b21edb4df7285f27ea5f0403377dcabe22d Mon Sep 17 00:00:00 2001
2 From: Ioana Ciornei <ioana.ciornei@nxp.com>
3 Date: Tue, 29 Oct 2019 22:48:55 +0200
4 Subject: [PATCH] bus: fsl-mc: add autorescan sysfs
6 Add the autorescan sysfs in order to enable/disable the DPRC IRQs on
7 which automatic rescan of the bus is performed. This is important when
8 dynamic creation of objects is needed to happen in a timely manner because
9 object creation can be bundled together.
11 Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
13 drivers/bus/fsl-mc/dprc-driver.c | 17 ++++++++++--
14 drivers/bus/fsl-mc/fsl-mc-bus.c | 55 +++++++++++++++++++++++++++++++++++++
15 drivers/bus/fsl-mc/fsl-mc-private.h | 4 +++
16 include/linux/fsl/mc.h | 1 +
17 4 files changed, 75 insertions(+), 2 deletions(-)
19 --- a/drivers/bus/fsl-mc/dprc-driver.c
20 +++ b/drivers/bus/fsl-mc/dprc-driver.c
21 @@ -484,8 +484,9 @@ out:
23 * Disable and clear interrupt for a given DPRC object
25 -static int disable_dprc_irq(struct fsl_mc_device *mc_dev)
26 +int disable_dprc_irq(struct fsl_mc_device *mc_dev)
28 + struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
30 struct fsl_mc_io *mc_io = mc_dev->mc_io;
32 @@ -522,9 +523,18 @@ static int disable_dprc_irq(struct fsl_m
36 + mc_bus->irq_enabled = 0;
41 +int get_dprc_irq_state(struct fsl_mc_device *mc_dev)
43 + struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
45 + return mc_bus->irq_enabled;
48 static int register_dprc_irq_handler(struct fsl_mc_device *mc_dev)
51 @@ -551,8 +561,9 @@ static int register_dprc_irq_handler(str
55 -static int enable_dprc_irq(struct fsl_mc_device *mc_dev)
56 +int enable_dprc_irq(struct fsl_mc_device *mc_dev)
58 + struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
62 @@ -580,6 +591,8 @@ static int enable_dprc_irq(struct fsl_mc
66 + mc_bus->irq_enabled = 1;
71 --- a/drivers/bus/fsl-mc/fsl-mc-bus.c
72 +++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
73 @@ -237,8 +237,63 @@ static ssize_t rescan_store(struct bus_t
75 static BUS_ATTR_WO(rescan);
77 +static int fsl_mc_bus_set_autorescan(struct device *dev, void *data)
79 + struct fsl_mc_device *root_mc_dev;
83 + if (!fsl_mc_is_root_dprc(dev))
86 + root_mc_dev = to_fsl_mc_device(dev);
88 + if (kstrtoul(buf, 0, &val) < 0)
92 + enable_dprc_irq(root_mc_dev);
94 + disable_dprc_irq(root_mc_dev);
100 +static int fsl_mc_bus_get_autorescan(struct device *dev, void *data)
102 + struct fsl_mc_device *root_mc_dev;
105 + if (!fsl_mc_is_root_dprc(dev))
108 + root_mc_dev = to_fsl_mc_device(dev);
110 + sprintf(buf, "%d\n", get_dprc_irq_state(root_mc_dev));
115 +static ssize_t autorescan_store(struct bus_type *bus,
116 + const char *buf, size_t count)
118 + bus_for_each_dev(bus, NULL, (void *)buf, fsl_mc_bus_set_autorescan);
123 +static ssize_t autorescan_show(struct bus_type *bus, char *buf)
125 + bus_for_each_dev(bus, NULL, (void *)buf, fsl_mc_bus_get_autorescan);
126 + return strlen(buf);
129 +static BUS_ATTR_RW(autorescan);
131 static struct attribute *fsl_mc_bus_attrs[] = {
132 &bus_attr_rescan.attr,
133 + &bus_attr_autorescan.attr,
137 --- a/drivers/bus/fsl-mc/fsl-mc-private.h
138 +++ b/drivers/bus/fsl-mc/fsl-mc-private.h
139 @@ -203,4 +203,8 @@ static inline void fsl_mc_uapi_remove_de
143 +int disable_dprc_irq(struct fsl_mc_device *mc_dev);
144 +int enable_dprc_irq(struct fsl_mc_device *mc_dev);
145 +int get_dprc_irq_state(struct fsl_mc_device *mc_dev);
147 #endif /* _FSL_MC_PRIVATE_H_ */
148 --- a/include/linux/fsl/mc.h
149 +++ b/include/linux/fsl/mc.h
150 @@ -1006,6 +1006,7 @@ struct fsl_mc_bus {
151 struct mutex scan_mutex; /* serializes bus scanning */
152 struct dprc_attributes dprc_attr;
153 struct fsl_mc_uapi uapi_misc;
157 int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev,