Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
firmware: tegra: bpmp: Add tegra_bpmp_get_with_id() function
Some device tree bindings need to specify a parameter along with a BPMP
phandle reference to designate the ID associated with a given controller
that needs to interoperate with BPMP. Typically this is specified as an
extra cell in the nvidia,bpmp property, so add a helper to parse this ID
while resolving the phandle reference.
Signed-off-by: Thierry Reding <treding@nvidia.com>
+42
+34
drivers/firmware/tegra/bpmp.c
+34
drivers/firmware/tegra/bpmp.c
···
32
32
return bpmp->soc->ops;
33
33
}
34
34
35
+
struct tegra_bpmp *tegra_bpmp_get_with_id(struct device *dev, unsigned int *id)
36
+
{
37
+
struct platform_device *pdev;
38
+
struct of_phandle_args args;
39
+
struct tegra_bpmp *bpmp;
40
+
int err;
41
+
42
+
err = __of_parse_phandle_with_args(dev->of_node, "nvidia,bpmp", NULL,
43
+
1, 0, &args);
44
+
if (err < 0)
45
+
return ERR_PTR(err);
46
+
47
+
pdev = of_find_device_by_node(args.np);
48
+
if (!pdev) {
49
+
bpmp = ERR_PTR(-ENODEV);
50
+
goto put;
51
+
}
52
+
53
+
bpmp = platform_get_drvdata(pdev);
54
+
if (!bpmp) {
55
+
bpmp = ERR_PTR(-EPROBE_DEFER);
56
+
put_device(&pdev->dev);
57
+
goto put;
58
+
}
59
+
60
+
if (id)
61
+
*id = args.args[0];
62
+
63
+
put:
64
+
of_node_put(args.np);
65
+
return bpmp;
66
+
}
67
+
EXPORT_SYMBOL_GPL(tegra_bpmp_get_with_id);
68
+
35
69
struct tegra_bpmp *tegra_bpmp_get(struct device *dev)
36
70
{
37
71
struct platform_device *pdev;
+8
include/soc/tegra/bpmp.h
+8
include/soc/tegra/bpmp.h
···
127
127
128
128
#if IS_ENABLED(CONFIG_TEGRA_BPMP)
129
129
struct tegra_bpmp *tegra_bpmp_get(struct device *dev);
130
+
struct tegra_bpmp *tegra_bpmp_get_with_id(struct device *dev, unsigned int *id);
130
131
void tegra_bpmp_put(struct tegra_bpmp *bpmp);
131
132
int tegra_bpmp_transfer_atomic(struct tegra_bpmp *bpmp,
132
133
struct tegra_bpmp_message *msg);
···
146
145
{
147
146
return ERR_PTR(-ENOTSUPP);
148
147
}
148
+
149
+
static inline struct tegra_bpmp *tegra_bpmp_get_with_id(struct device *dev,
150
+
unsigned int *id)
151
+
{
152
+
return ERR_PTR(-ENODEV);
153
+
}
154
+
149
155
static inline void tegra_bpmp_put(struct tegra_bpmp *bpmp)
150
156
{
151
157
}