diff options
| author | Francois Gervais <fgervais@distech-controls.com> | 2021-03-10 16:10:26 -0500 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2021-04-16 23:50:25 +0200 |
| commit | 03531606ef4cda25b629f500d1ffb6173b805c05 (patch) | |
| tree | 1f05f1ecaf4335c4cebec1764df0839e2ab69dd0 /drivers/rtc/rtc-pcf85063.c | |
| parent | 3fd00fdc4f11c656a63e6a6280c0bcb63cf109a2 (diff) | |
| download | linux-03531606ef4cda25b629f500d1ffb6173b805c05.tar.gz | |
rtc: pcf85063: fallback to parent of_node
The rtc device node is always NULL.
Since v5.12-rc1-dontuse/3c9ea42802a1fbf7ef29660ff8c6e526c58114f6 this
will lead to a NULL pointer dereference.
To fix this use the parent node which is the i2c client node as set by
devm_rtc_allocate_device().
Using the i2c client node seems to be what other similar drivers do
e.g. rtc-pcf8563.c.
Signed-off-by: Francois Gervais <fgervais@distech-controls.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210310211026.27299-1-fgervais@distech-controls.com
Diffstat (limited to 'drivers/rtc/rtc-pcf85063.c')
| -rw-r--r-- | drivers/rtc/rtc-pcf85063.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/rtc/rtc-pcf85063.c b/drivers/rtc/rtc-pcf85063.c index aef6c1ee8bb0e..82becae142299 100644 --- a/drivers/rtc/rtc-pcf85063.c +++ b/drivers/rtc/rtc-pcf85063.c @@ -478,6 +478,7 @@ static struct clk *pcf85063_clkout_register_clk(struct pcf85063 *pcf85063) { struct clk *clk; struct clk_init_data init; + struct device_node *node = pcf85063->rtc->dev.parent->of_node; init.name = "pcf85063-clkout"; init.ops = &pcf85063_clkout_ops; @@ -487,15 +488,13 @@ static struct clk *pcf85063_clkout_register_clk(struct pcf85063 *pcf85063) pcf85063->clkout_hw.init = &init; /* optional override of the clockname */ - of_property_read_string(pcf85063->rtc->dev.of_node, - "clock-output-names", &init.name); + of_property_read_string(node, "clock-output-names", &init.name); /* register the clock */ clk = devm_clk_register(&pcf85063->rtc->dev, &pcf85063->clkout_hw); if (!IS_ERR(clk)) - of_clk_add_provider(pcf85063->rtc->dev.of_node, - of_clk_src_simple_get, clk); + of_clk_add_provider(node, of_clk_src_simple_get, clk); return clk; } |