clk: shmobile: div6: Make clock-output-names optional

Renesas DIV6 clocks provide a single clock output.  Hence make the
"clock-output-names" DT property optional instead of mandatory. In case
the DT property is omitted the DT node name will be used.

Rename the variable "name" to "clk_name" to make the code more similar
with fixed-factor-clock.c, and to avoid a conflict with a nested local
variable while we're at it.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/Documentation/devicetree/bindings/clock/renesas,cpg-div6-clocks.txt b/Documentation/devicetree/bindings/clock/renesas,cpg-div6-clocks.txt
index 38dcf03..ae36ab8 100644 (file)
--- a/Documentation/devicetree/bindings/clock/renesas,cpg-div6-clocks.txt
+++ b/Documentation/devicetree/bindings/clock/renesas,cpg-div6-clocks.txt
@@ -20,6 +20,10 @@ Required Properties:
     clocks must be specified.  For clocks with multiple parents, invalid
     settings must be specified as "<0>".
   - #clock-cells: Must be 0
+
+
+Optional Properties:
+
   - clock-output-names: The name of the clock as a free-form string
 
 

diff --git a/drivers/clk/shmobile/clk-div6.c b/drivers/clk/shmobile/clk-div6.c
index b4c8d67..57016ff 100644 (file)
--- a/drivers/clk/shmobile/clk-div6.c
+++ b/drivers/clk/shmobile/clk-div6.c
@@ -178,10 +178,9 @@ static void __init cpg_div6_clock_init(struct device_node *np)
        const char **parent_names;
        struct clk_init_data init;
        struct div6_clock *clock;
-       const char *name;
+       const char *clk_name = np->name;
        struct clk *clk;
        unsigned int i;
-       int ret;
 
        clock = kzalloc(sizeof(*clock), GFP_KERNEL);
        if (!clock)
@@ -215,13 +214,7 @@ static void __init cpg_div6_clock_init(struct device_node *np)
        clock->div = (clk_readl(clock->reg) & CPG_DIV6_DIV_MASK) + 1;
 
        /* Parse the DT properties. */
-       ret = of_property_read_string(np, "clock-output-names", &name);
-       if (ret < 0) {
-               pr_err("%s: failed to get %s DIV6 clock output name\n",
-                      __func__, np->name);
-               goto error;
-       }
-
+       of_property_read_string(np, "clock-output-names", &clk_name);
 
        for (i = 0, valid_parents = 0; i < num_parents; i++) {
                const char *name = of_clk_get_parent_name(np, i);
@@ -255,7 +248,7 @@ static void __init cpg_div6_clock_init(struct device_node *np)
        }
 
        /* Register the clock. */
-       init.name = name;
+       init.name = clk_name;
        init.ops = &cpg_div6_clock_ops;
        init.flags = CLK_IS_BASIC;
        init.parent_names = parent_names;