ARC: [plat-axs103]: Set initial core pll output frequency

Set initial core pll output frequency specified in device tree to
100MHz for SMP configuration and 90MHz for UP configuration.
It will be applied at the core pll driver probing.

Update platform quirk for decreasing core frequency for quad core
configuration.

Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

diff --git a/arch/arc/boot/dts/axc003.dtsi b/arch/arc/boot/dts/axc003.dtsi
index 4e6e9f5..dc91c66 100644 (file)
--- a/arch/arc/boot/dts/axc003.dtsi
+++ b/arch/arc/boot/dts/axc003.dtsi
@@ -35,6 +35,14 @@
                        reg = <0x80 0x10>, <0x100 0x10>;
                        #clock-cells = <0>;
                        clocks = <&input_clk>;
+
+                       /*
+                        * Set initial core pll output frequency to 90MHz.
+                        * It will be applied at the core pll driver probing
+                        * on early boot.
+                        */
+                       assigned-clocks = <&core_clk>;
+                       assigned-clock-rates = <90000000>;
                };
 
                core_intc: archs-intc@cpu {

diff --git a/arch/arc/boot/dts/axc003_idu.dtsi b/arch/arc/boot/dts/axc003_idu.dtsi
index 63954a8..69ff489 100644 (file)
--- a/arch/arc/boot/dts/axc003_idu.dtsi
+++ b/arch/arc/boot/dts/axc003_idu.dtsi
@@ -35,6 +35,14 @@
                        reg = <0x80 0x10>, <0x100 0x10>;
                        #clock-cells = <0>;
                        clocks = <&input_clk>;
+
+                       /*
+                        * Set initial core pll output frequency to 100MHz.
+                        * It will be applied at the core pll driver probing
+                        * on early boot.
+                        */
+                       assigned-clocks = <&core_clk>;
+                       assigned-clock-rates = <100000000>;
                };
 
                core_intc: archs-intc@cpu {

diff --git a/arch/arc/plat-axs10x/axs10x.c b/arch/arc/plat-axs10x/axs10x.c
index f1ac679..ac1a712 100644 (file)
--- a/arch/arc/plat-axs10x/axs10x.c
+++ b/arch/arc/plat-axs10x/axs10x.c
@@ -320,22 +320,18 @@ static void __init axs103_early_init(void)
        unsigned int num_cores = (read_aux_reg(ARC_REG_MCIP_BCR) >> 16) & 0x3F;
        if (num_cores > 2) {
                u32 freq = 50, orig;
-               /*
-                * TODO: use cpu node "cpu-freq" param instead of platform-specific
-                * "/cpu_card/core_clk" as it works only if we use fixed-clock for cpu.
-                */
                int off = fdt_path_offset(initial_boot_params, "/cpu_card/core_clk");
                const struct fdt_property *prop;
 
                prop = fdt_get_property(initial_boot_params, off,
-                                       "clock-frequency", NULL);
+                                       "assigned-clock-rates", NULL);
                orig = be32_to_cpu(*(u32*)(prop->data)) / 1000000;
 
                /* Patching .dtb in-place with new core clock value */
                if (freq != orig ) {
                        freq = cpu_to_be32(freq * 1000000);
                        fdt_setprop_inplace(initial_boot_params, off,
-                                           "clock-frequency", &freq, sizeof(freq));
+                                           "assigned-clock-rates", &freq, sizeof(freq));
                }
        }
 #endif