fdt_parser/
clocks.rs

1use core::fmt::Debug;
2
3use crate::{node::Node, read::FdtReader, Fdt, Phandle};
4
5pub struct ClocksIter<'a> {
6    pub fdt: Fdt<'a>,
7    pub id_list: Option<FdtReader<'a>>,
8    pub name_list: Option<FdtReader<'a>>,
9}
10
11impl<'a> ClocksIter<'a> {
12    pub fn new(node: &'a Node<'a>) -> Self {
13        let fdt = node.fdt.clone();
14        let id_list = node.find_property("clocks");
15        let name_list = node.find_property("clock-names");
16
17        Self {
18            fdt,
19            id_list: id_list.map(|p| p.data),
20            name_list: name_list.map(|p| p.data),
21        }
22    }
23}
24
25impl<'a> Iterator for ClocksIter<'a> {
26    type Item = ClockRef<'a>;
27
28    fn next(&mut self) -> Option<Self::Item> {
29        let p = self.id_list.as_mut()?;
30        let phandle = Phandle::from(p.take_u32()?);
31
32        let node = self.fdt.get_node_by_phandle(phandle)?;
33        let mut select = 0;
34        let mut name = None;
35        let mut clock_frequency = None;
36
37        let cell_size = node
38            .find_property("#clock-cells")
39            .expect("#clock-cells not found")
40            .u32();
41
42        if cell_size > 0 {
43            select = p.take_u32().expect("invalid clock cells");
44        } else {
45            clock_frequency = node.clock_frequency()
46        }
47
48        if let Some(name_prop) = &mut self.name_list {
49            name = name_prop.take_str().ok();
50        }
51
52        Some(ClockRef {
53            node,
54            select: select as _,
55            name,
56            clock_frequency,
57        })
58    }
59}
60
61pub struct ClockRef<'a> {
62    pub node: Node<'a>,
63    /// second cell of one of `clocks`.
64    pub select: usize,
65    pub name: Option<&'a str>,
66    pub clock_frequency: Option<u32>,
67}
68
69impl Debug for ClockRef<'_> {
70    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
71        f.debug_struct("ClockRef")
72            .field("node", &self.node.name())
73            .field("select", &self.select)
74            .field("name", &self.name)
75            .field("clock-frequency", &self.clock_frequency)
76            .finish()
77    }
78}
fdt_parser/clocks.rs

fdt_parser/
clocks.rs
