cpu frequency

[he1pu]

May I ask if it is possible to add more CPU frequencies?

[Gentle-JT]

You can modify the dtb to achieve overclocking, and now the fastest is 2.1G.

[he1pu]

You can modify the dtb to achieve overclocking, and now the fastest is 2.1G.

An error occurred after setting:

[    6.623912] cpufreq: __target_index: Failed to change cpu frequency: -34
[    6.654790] cpu cpu0: dev_pm_opp_set_rate: failed to find OPP for freq 2188800000 (-34)

[Gentle-JT]

[ 6.654790] cpu cpu0: dev_pm_opp_set_rate: failed to find OPP for freq 2188800000 (-34)

It seems like you haven't modified OPP-HZ. You can search for OPP-HZ and find it in DTB.

[he1pu]

I have modified: drivers/clk/qcom/a53-pl.c

static const struct pll_freq_tbl a53pll_freq[] = {
	{  384000000, 20, 0x0, 0x1, 0 },
	{  787200000, 41, 0x0, 0x1, 0 },
	{  998400000, 52, 0x0, 0x1, 0 },
	{ 1094400000, 57, 0x0, 0x1, 0 },
	{ 1152000000, 62, 0x0, 0x1, 0 },
	{ 1209600000, 63, 0x0, 0x1, 0 },
	{ 1248000000, 65, 0x0, 0x1, 0 },
	{ 1363200000, 71, 0x0, 0x1, 0 },
	{ 1401600000, 73, 0x0, 0x1, 0 },
	{ 1612800000, 84, 0x0, 0x1, 0 },
    	{ 1843200000, 96, 0x0, 0x1, 0 },
    	{ 1977600000, 103, 0x0, 0x1, 0 },
    	{ 2112000000, 110, 0x0, 0x1, 0 },
	{ }
};

and:

opp-table-cpu {
	compatible = "operating-points-v2";
	opp-shared;
	phandle = <0x06>;
        
        opp-384000000 {
            opp-hz = <0x00 0x16e36000>;
        };
        opp-787200000 {
            opp-hz = <0x00 0x2ef42000>;
        };
        opp-998400000 {
            opp-hz = <0x00 0x3b826000>;
        };
        opp-1094400000 {
            opp-hz = <0x00 0x41376000>;
        };
        opp-1152000000 {
            opp-hz = <0x00 0x44aa2000>;
        };
        opp-1209600000 {
            opp-hz = <0x00 0x481ce000>;
        };
        opp-1248000000 {
            opp-hz = <0x00 0x4a5e1000>;
        };
        opp-1363200000 {
            opp-hz = <0x00 0x51615000>;
        };
        opp-1401600000 {
            opp-hz = <0x00 0x53c21000>;
        };
        opp-1612800000 {
            opp-hz = <0x00 0x60144000>;
        };
        opp-1843200000 {
            opp-hz = <0x00 0x6ddd0000>;
        };
        opp-1977600000 {
            opp-hz = <0x00 0x75bca000>;
        };
        opp-2112000000 {
            opp-hz = <0x00 0x7dfa4000>;
        };
};

The above error still occurs

[Gentle-JT]

-34 error is out of range. You can try the highest frequency already available in a53-pl.c, and if possible, add a slightly higher frequency