clk: shmobile: clk-mstp: change to using clock-indices

With the addition of clock-indices, we need to change the renesas
clock implementation to use these instead of the local definition
of "renesas,clock-indices".

Since this will break booting with older device trees, we add a
simple auto-detection of which properties are present.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

2 files changed, 8 insertions, 3 deletions

diff --git a/Documentation/devicetree/bindings/clock/renesas,cpg-mstp-clocks.txt b/Documentation/devicetree/bindings/clock/renesas,cpg-mstp-clocks.txt
index 5992dceec7af..02a25d99ca61 100644
--- a/Documentation/devicetree/bindings/clock/renesas,cpg-mstp-clocks.txt
+++ b/Documentation/devicetree/bindings/clock/renesas,cpg-mstp-clocks.txt
@@ -43,7 +43,7 @@ Example
                 clock-output-names =
                         "tpu0", "mmcif1", "sdhi3", "sdhi2",
                          "sdhi1", "sdhi0", "mmcif0";
-                renesas,clock-indices = <
+                clock-indices = <
                         R8A7790_CLK_TPU0 R8A7790_CLK_MMCIF1 R8A7790_CLK_SDHI3
                         R8A7790_CLK_SDHI2 R8A7790_CLK_SDHI1 R8A7790_CLK_SDHI0
                         R8A7790_CLK_MMCIF0
diff --git a/drivers/clk/shmobile/clk-mstp.c b/drivers/clk/shmobile/clk-mstp.c
index 2e5810c88d11..1f6324e29a80 100644
--- a/drivers/clk/shmobile/clk-mstp.c
+++ b/drivers/clk/shmobile/clk-mstp.c
@@ -156,6 +156,7 @@ cpg_mstp_clock_register(const char *name, const char *parent_name,
 static void __init cpg_mstp_clocks_init(struct device_node *np)
 {
         struct mstp_clock_group *group;
+        const char *idxname;
         struct clk **clks;
         unsigned int i;
 
@@ -184,6 +185,11 @@ static void __init cpg_mstp_clocks_init(struct device_node *np)
         for (i = 0; i < MSTP_MAX_CLOCKS; ++i)
                 clks[i] = ERR_PTR(-ENOENT);
 
+        if (of_find_property(np, "clock-indices", &i))
+                idxname = "clock-indices";
+        else
+                idxname = "renesas,clock-indices";
+
         for (i = 0; i < MSTP_MAX_CLOCKS; ++i) {
                 const char *parent_name;
                 const char *name;
@@ -197,8 +203,7 @@ static void __init cpg_mstp_clocks_init(struct device_node *np)
                         continue;
 
                 parent_name = of_clk_get_parent_name(np, i);
-                ret = of_property_read_u32_index(np, "renesas,clock-indices", i,
-                                                 &clkidx);
+                ret = of_property_read_u32_index(np, idxname, i, &clkidx);
                 if (parent_name == NULL || ret < 0)
                         break;