UTMI+ Low Pin Interface (ULPI) is a commonly used PHY interface for USB 2.0. The ULPI specification describes a standard set of registers which the vendors can extend for their specific needs. ULPI PHYs provide often functions such as charger detection and ADP sensing and probing. There are two major issues that the bus type is meant to tackle: Firstly, ULPI registers are accessed from the controller. The bus provides convenient method for the controller drivers to share that access with the actual PHY drivers. Secondly, there are already platforms that assume ULPI PHYs are runtime detected, such as many Intel Baytrail based platforms. They do not provide any kind of hardware description for the ULPI PHYs like separate ACPI device object that could be used to enumerate a device from.
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| @@ -189,5 +189,9 @@ int main(void) · 188 unmodified lines | ||
| 189 | 189 | DEVID_FIELD(rio_device_id, asm_did); |
| 190 | 190 | DEVID_FIELD(rio_device_id, asm_vid); |
| 191 | 191 | |
| 192 | + DEVID(ulpi_device_id); | |
| 193 | + DEVID_FIELD(ulpi_device_id, vendor); | |
| 194 | + DEVID_FIELD(ulpi_device_id, product); | |
| 195 | + | |
| 192 | 196 | return 0; |
| 193 | 197 | } |
| @@ -1192,6 +1192,19 @@ static int do_rio_entry(const char *filename, · 1191 unmodified lines | ||
| 1192 | 1192 | } |
| 1193 | 1193 | ADD_TO_DEVTABLE("rapidio", rio_device_id, do_rio_entry); |
| 1194 | 1194 | |
| 1195 | +/* Looks like: ulpi:vNpN */ | |
| 1196 | +static int do_ulpi_entry(const char *filename, void *symval, | |
| 1197 | + char *alias) | |
| 1198 | +{ | |
| 1199 | + DEF_FIELD(symval, ulpi_device_id, vendor); | |
| 1200 | + DEF_FIELD(symval, ulpi_device_id, product); | |
| 1201 | + | |
| 1202 | + sprintf(alias, "ulpi:v%04xp%04x", vendor, product); | |
| 1203 | + | |
| 1204 | + return 1; | |
| 1205 | +} | |
| 1206 | +ADD_TO_DEVTABLE("ulpi", ulpi_device_id, do_ulpi_entry); | |
| 1207 | + | |
| 1195 | 1208 | /* Does namelen bytes of name exactly match the symbol? */ |
| 1196 | 1209 | static bool sym_is(const char *name, unsigned namelen, const char *symbol) |
| 1197 | 1210 | { |