ARM: dts: dra7xx-clocks: Fix the l3 and l4 clock rates

Without the patch:
/debug/.../dpll_core_x2_ck/dpll_core_h12x2_ck # cat clk_rate
532000000
/debug/.../dpll_core_x2_ck/dpll_core_h12x2_ck/l3_iclk_div # cat clk_rate
532000000
/debug/.../dpll_core_x2_ck/dpll_core_h12x2_ck/l3_iclk_div/l4_root_clk_div # cat clk_rate
532000000

With the patch:
/debug/.../dpll_core_x2_ck/dpll_core_h12x2_ck # cat clk_rate
532000000
/debug/.../dpll_core_x2_ck/dpll_core_h12x2_ck/l3_iclk_div # cat clk_rate
266000000
/debug/.../dpll_core_x2_ck/dpll_core_h12x2_ck/l3_iclk_div/l4_root_clk_div # cat clk_rate
133000000

The l3 clock derived from core DPLL is actually a divider clock,
with the default divider set to 2. l4 then derived from l3 is a fixed factor
clock, but the fixed divider is 2 and not 1. Which means the l3 clock is
half of core DPLLs h12x2 and l4 is half of l3 (as seen with this patch)

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>

diff --git a/arch/arm/boot/dts/dra7xx-clocks.dtsi b/arch/arm/boot/dts/dra7xx-clocks.dtsi
index b03cfe4..d126d57 100644 (file)
--- a/arch/arm/boot/dts/dra7xx-clocks.dtsi
+++ b/arch/arm/boot/dts/dra7xx-clocks.dtsi
@@ -673,10 +673,12 @@
 
        l3_iclk_div: l3_iclk_div {
                #clock-cells = <0>;
-               compatible = "fixed-factor-clock";
+               compatible = "ti,divider-clock";
+               ti,max-div = <2>;
+               ti,bit-shift = <4>;
+               reg = <0x0100>;
                clocks = <&dpll_core_h12x2_ck>;
-               clock-mult = <1>;
-               clock-div = <1>;
+               ti,index-power-of-two;
        };
 
        l4_root_clk_div: l4_root_clk_div {
@@ -684,7 +686,7 @@
                compatible = "fixed-factor-clock";
                clocks = <&l3_iclk_div>;
                clock-mult = <1>;
-               clock-div = <1>;
+               clock-div = <2>;
        };
 
        video1_clk2_div: video1_clk2_div {