diff options
| -rw-r--r-- | Documentation/devicetree/bindings/rtc/nxp,pcf85063.txt | 9 | ||||
| -rw-r--r-- | drivers/rtc/rtc-pcf85063.c | 12 |
2 files changed, 21 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/rtc/nxp,pcf85063.txt b/Documentation/devicetree/bindings/rtc/nxp,pcf85063.txt index 627bb533eff7..6439682c9319 100644 --- a/Documentation/devicetree/bindings/rtc/nxp,pcf85063.txt +++ b/Documentation/devicetree/bindings/rtc/nxp,pcf85063.txt @@ -13,10 +13,19 @@ Optional property: expressed in femto Farad (fF). Valid values are 7000 and 12500. Default value (if no value is specified) is 7000fF. +Optional child node: +- clock: Provide this if the square wave pin is used as boot-enabled fixed clock. + Example: pcf85063: rtc@51 { compatible = "nxp,pcf85063"; reg = <0x51>; quartz-load-femtofarads = <12500>; + + clock { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <32768>; + }; }; diff --git a/drivers/rtc/rtc-pcf85063.c b/drivers/rtc/rtc-pcf85063.c index 14da4ab30104..3e59590f9b69 100644 --- a/drivers/rtc/rtc-pcf85063.c +++ b/drivers/rtc/rtc-pcf85063.c @@ -479,6 +479,18 @@ 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; + struct device_node *fixed_clock; + + fixed_clock = of_get_child_by_name(node, "clock"); + if (fixed_clock) { + /* + * skip registering square wave clock when a fixed + * clock has been registered. The fixed clock is + * registered automatically when being referenced. + */ + of_node_put(fixed_clock); + return NULL; + } init.name = "pcf85063-clkout"; init.ops = &pcf85063_clkout_ops; |