From fbd1cec57064aa1380726ec899c49fcd84e702b9 Mon Sep 17 00:00:00 2001 From: Eugeniy Paltsev Date: Sat, 9 Dec 2017 16:59:17 +0300 Subject: [PATCH] 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 Signed-off-by: Eugeniy Paltsev Signed-off-by: Vineet Gupta --- arch/arc/boot/dts/axc003.dtsi | 8 ++++++++ arch/arc/boot/dts/axc003_idu.dtsi | 8 ++++++++ arch/arc/plat-axs10x/axs10x.c | 8 ++------ 3 files changed, 18 insertions(+), 6 deletions(-) diff --git a/arch/arc/boot/dts/axc003.dtsi b/arch/arc/boot/dts/axc003.dtsi index 4e6e9f5..dc91c66 100644 --- 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..69ff4895 100644 --- 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 --- 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 -- 2.7.4