On 09-12-15, 15:58, Lee Jones wrote:
> +/*
> + * Only match on "suitable for ALL versions" entries
> + *
> + * This will be used with the BIT() macro. It sets the
> + * top bit of a 32bit value and is equal to 0x80000000.
> + */
> +#define DEFAULT_VERSION 31
Okay, I misread it in the earlier version. This looks fine.
> +static int sti_cpufreq_set_opp_info(void)
> +{
> + sprintf(name, "pcode%d", pcode);
I would use snprintf here, in case I haven't counted the string
properly. That should guarantee that we don't access the anything else
than the 'name' array.
> +
> + ret = dev_pm_opp_set_prop_name(dev, name);
> + if (ret) {
> + dev_err(dev, "Failed to set prop name\n");
> + return ret;
> + }
> +
> + version[0] = BIT(major);
> + version[1] = BIT(minor);
> + version[2] = BIT(substrate);
> +
> + ret = dev_pm_opp_set_supported_hw(dev, version, VERSION_ELEMENTS);
> + if (ret) {
> + dev_err(dev, "Failed to set supported hardware\n");
> + return ret;
> + }
> +
> + dev_err(dev, "pcode: %d major: %d minor: %d substrate: %d\n",
> + pcode, major, minor, substrate);
> + dev_err(dev, "version[0]: %x version[1]: %x version[2]: %x\n",
> + version[0], version[1], version[2]);
These aren't errors.. dev_info ?
> +
> + return 0;
> +}
> +
> +static int sti_cpufreq_init(void)
> +{
> + int ret;
> +
> + ddata.cpu = get_cpu_device(0);
> + if (!ddata.cpu) {
> + dev_err(ddata.cpu, "Failed to get device for CPU0\n");
> + goto skip_voltage_scaling;
> + }
> +
> + if (!of_get_property(ddata.cpu->of_node, "operating-points-v2", NULL)) {
> + dev_err(ddata.cpu, "OPP-v2 not supported\n");
Should be:
dev_dbg(ddata.cpu, "OPP-v2 not supported, skip voltage
scaling\n");
> + goto skip_voltage_scaling;
> + }
> +
> + ret = sti_cpufreq_fetch_syscon_regsiters();
> + if (ret)
> + goto skip_voltage_scaling;
> +
> + ret = sti_cpufreq_set_opp_info();
> + if (ret)
Shouldn't this be !ret ? You should have jumped on success here.
> + goto register_cpufreq_dt;
> +
> +skip_voltage_scaling:
> + dev_err(ddata.cpu, "Not doing voltage scaling\n");
This doesn't look nice as you are adding unnecessary jumps to just
save on a print message. And because of the earlier suggestion you can
do:
ret = sti_cpufreq_set_opp_info();
if (ret)
dev_err(ddata.cpu, "Skip voltage scaling\n");
> +
> +register_cpufreq_dt:
> + platform_device_register_simple("cpufreq-dt", -1, NULL, 0);
> +
> + return 0;
> +}
> +module_init(sti_cpufreq_init);
> +
> +MODULE_DESCRIPTION("STMicroelectronics CPUFreq/OPP driver");
> +MODULE_AUTHOR("Ajitpal Singh <ajitpal.si...@st.com>");
> +MODULE_AUTHOR("Lee Jones <lee.jo...@linaro.org>");
> +MODULE_LICENSE("GPL v2");
> --
> 1.9.1
--
viresh
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