diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/clk/clk-mux.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/clk/clk-mux.c b/drivers/clk/clk-mux.c index ebf736bdff..e9cb614005 100644 --- a/drivers/clk/clk-mux.c +++ b/drivers/clk/clk-mux.c @@ -33,6 +33,13 @@ static int clk_mux_set_parent(struct clk *clk, u8 idx) struct clk_mux *m = container_of(clk, struct clk_mux, clk); u32 val; + if (m->flags & CLK_MUX_READ_ONLY) { + if (clk_mux_get_parent(clk) != idx) + return -EPERM; + else + return 0; + } + val = readl(m->reg); val &= ~(((1 << m->width) - 1) << m->shift); val |= idx << m->shift; |