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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2015-12-03 11:20:35 +0900 |
|---|---|---|
| committer | Stephen Boyd <sboyd@codeaurora.org> | 2015-12-02 22:34:43 -0800 |
| commit | 8da411cc1964c5d6a0a0f94c7bbf8693c9673a87 (patch) | |
| tree | 1f4540d075f7d2ea2e07ddec09e43e6c78204399 /drivers/clk/clk.c | |
| parent | 0b9ddcc84eba3309a42fd73d293cc5df79e911b4 (diff) | |
| download | linux-8da411cc1964c5d6a0a0f94c7bbf8693c9673a87.tar.bz2 | |
clk: let of_clk_get_parent_name() fail for invalid clock-indices
Currently, of_clk_get_parent_name() returns a wrong parent clock name
when "clock-indices" property exists and the target index is not
found in the property. In this case, NULL should be returned.
For example,
oscillator {
compatible = "myclocktype";
#clock-cells = <1>;
clock-indices = <1>, <3>;
clock-output-names = "clka", "clkb";
};
consumer {
compatible = "myclockconsumer";
clocks = <&oscillator 0>, <&oscillator 1>;
};
Currently, of_clk_get_parent_name(consumer_np, 0) returns "clka"
(and of_clk_get_parent_name(consumer_np, 1) also returns "clka",
this is correct). Because the "clock-indices" in the clock parent
does not contain <0>, of_clk_get_parent_name(consumer_np, 0) should
return NULL.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk/clk.c')
| -rw-r--r-- | drivers/clk/clk.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index a66efc9d8bfc..9352a13395c8 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -3079,6 +3079,9 @@ const char *of_clk_get_parent_name(struct device_node *np, int index) } count++; } + /* We went off the end of 'clock-indices' without finding it */ + if (prop && !vp) + return NULL; if (of_property_read_string_index(clkspec.np, "clock-output-names", index, |