diff options
| author | Gabriel Fernandez <gabriel.fernandez@st.com> | 2016-08-29 14:26:57 +0200 |
|---|---|---|
| committer | Stephen Boyd <sboyd@codeaurora.org> | 2016-09-16 16:01:39 -0700 |
| commit | 26bd0a57755df51a34037d8151a443cec3688b80 (patch) | |
| tree | 0e22849e7cf25d52dd89f5517aaff521351cfe2e | |
| parent | b699f3e3912f60119430e3af302a39eb992864d5 (diff) | |
| download | linux-26bd0a57755df51a34037d8151a443cec3688b80.tar.bz2 | |
drivers: clk: st: Add clock propagation for audio clocks
This patch allows fine tuning of the quads FS for audio clocks
accuracy.
Signed-off-by: Olivier Bideau <olivier.bideau@st.com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Acked-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
| -rw-r--r-- | Documentation/devicetree/bindings/clock/st/st,flexgen.txt | 2 | ||||
| -rw-r--r-- | drivers/clk/st/clk-flexgen.c | 26 |
2 files changed, 27 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/clock/st/st,flexgen.txt b/Documentation/devicetree/bindings/clock/st/st,flexgen.txt index b7ee5c7e0f75..d68f6a5f3f32 100644 --- a/Documentation/devicetree/bindings/clock/st/st,flexgen.txt +++ b/Documentation/devicetree/bindings/clock/st/st,flexgen.txt @@ -60,6 +60,8 @@ This binding uses the common clock binding[2]. Required properties: - compatible : shall be: "st,flexgen" + "st,flexgen-audio", "st,flexgen" (enable clock propagation on parent for + audio use case) - #clock-cells : from common clock binding; shall be set to 1 (multiple clock outputs). diff --git a/drivers/clk/st/clk-flexgen.c b/drivers/clk/st/clk-flexgen.c index 546bd79c8e3a..7ed05f0d629a 100644 --- a/drivers/clk/st/clk-flexgen.c +++ b/drivers/clk/st/clk-flexgen.c @@ -15,6 +15,10 @@ #include <linux/of.h> #include <linux/of_address.h> +struct clkgen_data { + unsigned long flags; +}; + struct flexgen { struct clk_hw hw; @@ -259,6 +263,18 @@ static const char ** __init flexgen_get_parents(struct device_node *np, return parents; } +static const struct clkgen_data clkgen_audio = { + .flags = CLK_SET_RATE_PARENT, +}; + +static const struct of_device_id flexgen_of_match[] = { + { + .compatible = "st,flexgen-audio", + .data = &clkgen_audio, + }, + {} +}; + static void __init st_of_flexgen_setup(struct device_node *np) { struct device_node *pnode; @@ -267,6 +283,9 @@ static void __init st_of_flexgen_setup(struct device_node *np) const char **parents; int num_parents, i; spinlock_t *rlock = NULL; + const struct of_device_id *match; + struct clkgen_data *data = NULL; + unsigned long flex_flags = 0; int ret; pnode = of_get_parent(np); @@ -281,6 +300,12 @@ static void __init st_of_flexgen_setup(struct device_node *np) if (!parents) return; + match = of_match_node(flexgen_of_match, np); + if (match) { + data = (struct clkgen_data *)match->data; + flex_flags = data->flags; + } + clk_data = kzalloc(sizeof(*clk_data), GFP_KERNEL); if (!clk_data) goto err; @@ -307,7 +332,6 @@ static void __init st_of_flexgen_setup(struct device_node *np) for (i = 0; i < clk_data->clk_num; i++) { struct clk *clk; const char *clk_name; - unsigned long flex_flags = 0; if (of_property_read_string_index(np, "clock-output-names", i, &clk_name)) { |