clk: ux500: Add armss clk and fixup smp_twd clk for u8500

The new armss clk is a prcmu_scalable_rate clk which represents
the ARMSS clk. This then makes it possible to convert the smp_twd
clk to a fixed factor clock type, using a fixed divider of 2 and
with the armss clk as parent.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>

1 files changed, 8 insertions, 6 deletions

diff --git a/drivers/clk/ux500/u8500_clk.c b/drivers/clk/ux500/u8500_clk.c
index 7bebf1f62c65..955110db2440 100644
--- a/drivers/clk/ux500/u8500_clk.c
+++ b/drivers/clk/ux500/u8500_clk.c
@@ -206,16 +206,18 @@ void u8500_clk_init(void)
         clk_register_clkdev(clk, "dsilp2", "dsilink.2");
         clk_register_clkdev(clk, "dsilp2", "mcde");
 
-        clk = clk_reg_prcmu_rate("smp_twd", NULL, PRCMU_ARMSS,
-                                CLK_IS_ROOT|CLK_GET_RATE_NOCACHE|
-                                CLK_IGNORE_UNUSED);
+        clk = clk_reg_prcmu_scalable_rate("armss", NULL,
+                                PRCMU_ARMSS, 0, CLK_IS_ROOT|CLK_IGNORE_UNUSED);
+        clk_register_clkdev(clk, "armss", NULL);
+
+        clk = clk_register_fixed_factor(NULL, "smp_twd", "armss",
+                                CLK_IGNORE_UNUSED, 1, 2);
         clk_register_clkdev(clk, NULL, "smp_twd");
 
         /*
          * FIXME: Add special handled PRCMU clocks here:
-         * 1. clk_arm, use PRCMU_ARMCLK.
-         * 2. clkout0yuv, use PRCMU as parent + need regulator + pinctrl.
-         * 3. ab9540_clkout1yuv, see clkout0yuv
+         * 1. clkout0yuv, use PRCMU as parent + need regulator + pinctrl.
+         * 2. ab9540_clkout1yuv, see clkout0yuv
          */
 
         /* PRCC P-clocks */