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authorTomasz Figa <tomasz.figa@gmail.com>2013-07-23 01:49:18 +0200
committerMike Turquette <mturquette@linaro.org>2013-08-05 11:56:46 -0700
commitc57acd14ac2d53e40f5c17701c3cc3a092a07b35 (patch)
treef26fc4f7c7449f3ccfb2e36090561adbf0504bd2 /drivers/clk/clk-mux.c
parent3b2f64d00c46e1e4e9bd0bb9bb12619adac27a4b (diff)
downloadlinux-c57acd14ac2d53e40f5c17701c3cc3a092a07b35.tar.bz2
clk: mux: Add support for read-only muxes.
Some platforms have read-only clock muxes that are preconfigured at reset and cannot be changed at runtime. This patch extends mux clock driver to allow handling such read-only muxes by adding new CLK_MUX_READ_ONLY mux flag. Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
Diffstat (limited to 'drivers/clk/clk-mux.c')
-rw-r--r--drivers/clk/clk-mux.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/clk/clk-mux.c b/drivers/clk/clk-mux.c
index 614444ca40cd..92f1a1be5319 100644
--- a/drivers/clk/clk-mux.c
+++ b/drivers/clk/clk-mux.c
@@ -107,6 +107,11 @@ const struct clk_ops clk_mux_ops = {
};
EXPORT_SYMBOL_GPL(clk_mux_ops);
+const struct clk_ops clk_mux_ro_ops = {
+ .get_parent = clk_mux_get_parent,
+};
+EXPORT_SYMBOL_GPL(clk_mux_ro_ops);
+
struct clk *clk_register_mux_table(struct device *dev, const char *name,
const char **parent_names, u8 num_parents, unsigned long flags,
void __iomem *reg, u8 shift, u32 mask,
@@ -133,7 +138,10 @@ struct clk *clk_register_mux_table(struct device *dev, const char *name,
}
init.name = name;
- init.ops = &clk_mux_ops;
+ if (clk_mux_flags & CLK_MUX_READ_ONLY)
+ init.ops = &clk_mux_ro_ops;
+ else
+ init.ops = &clk_mux_ops;
init.flags = flags | CLK_IS_BASIC;
init.parent_names = parent_names;
init.num_parents = num_parents;