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author | Sascha Hauer <s.hauer@pengutronix.de> | 2019-03-11 09:44:15 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-03-11 10:02:36 +0100 |
commit | c7cc27d006ccca5951b8fecb596d546998181f7c (patch) | |
tree | 9a1e3c45d41eb66c0b799e3d619553cbaea26fb2 /drivers/clk | |
parent | a2fbc210ade163ea3e746f49269b698bd8e5b7ed (diff) | |
download | barebox-c7cc27d006ccca5951b8fecb596d546998181f7c.tar.gz barebox-c7cc27d006ccca5951b8fecb596d546998181f7c.tar.xz |
clk: mux: Support CLK_MUX_READ_ONLY flag
Support readonly dividers using the CLK_MUX_READ_ONLY flag.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/clk')
-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; |