On 8/24/25 6:10 PM, Krzysztof Kozlowski wrote:
> On 19/08/2025 13:45, Tudor Ambarus wrote:
>> +
>> +static int acpm_clk_set_rate(struct clk_hw *hw, unsigned long rate,
>> + unsigned long parent_rate)
>> +{
>> + struct acpm_clk *clk = to_acpm_clk(hw);
>> +
>> + return clk->handle->ops.dvfs_ops.set_rate(clk->handle,
>> + clk->acpm_chan_id, clk->id, rate);
>> +}
>> +
>> +static const struct clk_ops acpm_clk_ops = {
>> + .recalc_rate = acpm_clk_recalc_rate,
>> + .round_rate = acpm_clk_round_rate,
>
> This should be determine_rate. Check recent patchset from Brian Masney.
> I applied the samsung bits from it to samsung soc tree.
Will do.
>
> ...
>
>> +
>> +static int __init acpm_clk_probe(struct platform_device *pdev)
>
> module probe for sure should not be __init.
Ah, indeed, both __init and __refdata are wrong here, my appologies.
I assume they came from the time I considered the driver only needed
at boot time. Will drop them.
>
>> +{
>> + const struct acpm_clk_match_data *match_data;
>> + const struct acpm_handle *acpm_handle;
>> + struct clk_hw_onecell_data *clk_data;
>> + struct clk_hw **hws;
>> + struct device *dev = &pdev->dev;
>> + struct acpm_clk *aclks;
>> + unsigned int acpm_chan_id;
>> + int i, err, count;
>> +
>> + acpm_handle = devm_acpm_get_by_node(dev, dev->parent->of_node);
>> + if (IS_ERR(acpm_handle))
>> + return dev_err_probe(dev, PTR_ERR(acpm_handle),
>> + "Failed to get acpm handle.\n");
>> +
>> + match_data = of_device_get_match_data(dev);
>> + if (!match_data)
>> + return dev_err_probe(dev, -EINVAL,
>> + "Failed to get match data.\n");
>> +
>> + count = match_data->nr_clks;
>> + acpm_chan_id = match_data->acpm_chan_id;
>> +
>> + clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, count),
>> + GFP_KERNEL);
>> + if (!clk_data)
>> + return -ENOMEM;
>> +
>> + clk_data->num = count;
>> + hws = clk_data->hws;
>> +
>> + aclks = devm_kcalloc(dev, count, sizeof(*aclks), GFP_KERNEL);
>> + if (!aclks)
>> + return -ENOMEM;
>> +
>> + for (i = 0; i < count; i++) {
>> + const struct acpm_clk_variant *variant = &match_data->clks[i];
>> + struct acpm_clk *aclk = &aclks[i];
>> +
>> + hws[i] = &aclk->hw;
>> +
>> + aclk->id = variant->id;
>> + aclk->handle = acpm_handle;
>> + aclk->acpm_chan_id = acpm_chan_id;
>> +
>> + err = acpm_clk_ops_init(dev, aclk, variant->name);
>> + if (err)
>> + return dev_err_probe(dev, err,
>> + "Failed to register clock.\n");
>> + }
>> +
>> + return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
>> + clk_data);
>> +}
>> +
>> +#define ACPM_CLK(_id, cname) \
>> + { \
>> + .id = _id, \
>> + .name = cname, \
>> + }
>> +
>> +static const struct acpm_clk_variant gs101_acpm_clks[] __initconst = {
>
> This goes to top of the file, after struct declarations.
Okay, will do.
>
>> + ACPM_CLK(CLK_ACPM_DVFS_MIF, "mif"),
>> + ACPM_CLK(CLK_ACPM_DVFS_INT, "int"),
>> + ACPM_CLK(CLK_ACPM_DVFS_CPUCL0, "cpucl0"),
>> + ACPM_CLK(CLK_ACPM_DVFS_CPUCL1, "cpucl1"),
>> + ACPM_CLK(CLK_ACPM_DVFS_CPUCL2, "cpucl2"),
>> + ACPM_CLK(CLK_ACPM_DVFS_G3D, "g3d"),
>> + ACPM_CLK(CLK_ACPM_DVFS_G3DL2, "g3dl2"),
>> + ACPM_CLK(CLK_ACPM_DVFS_TPU, "tpu"),
>> + ACPM_CLK(CLK_ACPM_DVFS_INTCAM, "intcam"),
>> + ACPM_CLK(CLK_ACPM_DVFS_TNR, "tnr"),
>> + ACPM_CLK(CLK_ACPM_DVFS_CAM, "cam"),
>> + ACPM_CLK(CLK_ACPM_DVFS_MFC, "mfc"),
>> + ACPM_CLK(CLK_ACPM_DVFS_DISP, "disp"),
>> + ACPM_CLK(CLK_ACPM_DVFS_BO, "b0"),
>> +};
>> +
>> +static const struct acpm_clk_match_data acpm_clk_gs101 __initconst = {
>
> Are you going to have more of such clk_match_data? More variants?
I see downstream that gs101 and gs201 have the same clock IDs, clock names
and acpm_chan_id. But I can't tell about others. I assume it's safer to
assume there will be other variants.
Anyway, I'll pass this as platform data, if I understood correctly.
Thanks,
ta
>
>> + .clks = gs101_acpm_clks,
>> + .nr_clks = ARRAY_SIZE(gs101_acpm_clks),
>> + .acpm_chan_id = 0,
>> +};
>> +
