Hi,
On 5/22/24 9:48 AM, Hans de Goede wrote:
> +static int __init ts_parse_props(char *str)
> +{
> + char *name, *value;
> + u32 u32val;
> + int i, ret;
> +
> + /*
> + * str is part of the static_command_line from init/main.c and poking
> + * holes in that by writing 0 to it is allowed, as is taking long
> + * lasting references to it.
> + */
> + ts_cmdline_data.acpi_name = strsep(&str, ",");
> +
> + for (i = 0; i < MAX_CMDLINE_PROPS; i++) {
> + name = strsep(&str, ",");
> + if (!name)
> + break;
> +
> + /* Replace '=' with 0 and make value point past '=' or NULL */
> + value = name;
> + strsep(&value, "=");
> + if (!value) {
> + ts_cmdline_props[i] = PROPERTY_ENTRY_BOOL(name);
> + } else if (isdigit(value[0])) {
> + ret = kstrtou32(value, 10, &u32val);
> + if (ret)
> + return ret;
> +
> + ts_cmdline_props[i] = PROPERTY_ENTRY_U32(name, u32val);
> + } else {
> + ts_cmdline_props[i] = PROPERTY_ENTRY_STRING(name, value);
> + }
> + }
> +
> + if (!i)
> + return -EINVAL; /* No properties specified */
> +
> + if (str)
> + return -ENOSPC; /* More then MAX_CMDLINE_PROPS properties specified */
> +
> + ts_data = &ts_cmdline_data;
> + return 0;
> +}
> +__setup("i2c_touchscreen_props=", ts_parse_props);
__setup() is different from early_param() & its family.
__setup() functions return 1 for "handled" and 0 for "not handled".
See include/linux/init.h.
--
#Randy
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