ti: common: board_detect: Allow settings board detection variables manually

In some situations the EEPROM used for board detection may not be
programmed or simply programmed incorrectly. Therefore, it may be
necessary to "simulate" reading the contents of the EEPROM to set
appropriate variables used in the board detection code.

This may also be helpful in certain boot modes where doing i2c reads
may be costly and the config supports running only a specific board.

Signed-off-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Franklin S Cooper Jr. <fcooper@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

diff --git a/board/ti/common/board_detect.c b/board/ti/common/board_detect.c
index 6fdcb6172c0dea5ff2ce01cbdfd570fa45a1e1be..bf594cb1ab31ea1327c9df73e175779e5efb65c6 100644 (file)
--- a/board/ti/common/board_detect.c
+++ b/board/ti/common/board_detect.c
@@ -173,6 +173,30 @@ static int __maybe_unused ti_i2c_eeprom_get(int bus_addr, int dev_addr,
        return 0;
 }
 
+int __maybe_unused ti_i2c_eeprom_am_set(const char *name, const char *rev)
+{
+       struct ti_common_eeprom *ep;
+
+       if (!name || !rev)
+               return -1;
+
+       ep = TI_EEPROM_DATA;
+       if (ep->header == TI_EEPROM_HEADER_MAGIC)
+               goto already_set;
+
+       /* Set to 0 all fields */
+       memset(ep, 0, sizeof(*ep));
+       strncpy(ep->name, name, TI_EEPROM_HDR_NAME_LEN);
+       strncpy(ep->version, rev, TI_EEPROM_HDR_REV_LEN);
+       /* Some dummy serial number to identify the platform */
+       strncpy(ep->serial, "0000", TI_EEPROM_HDR_SERIAL_LEN);
+       /* Mark it with a valid header */
+       ep->header = TI_EEPROM_HEADER_MAGIC;
+
+already_set:
+       return 0;
+}
+
 int __maybe_unused ti_i2c_eeprom_am_get(int bus_addr, int dev_addr)
 {
        int rc;

diff --git a/board/ti/common/board_detect.h b/board/ti/common/board_detect.h
index 88b0a59f812fe3960c8c289f822ff0554a6270d8..e8d94844a7a4b1d6e65d0aa14c900232b9835267 100644 (file)
--- a/board/ti/common/board_detect.h
+++ b/board/ti/common/board_detect.h
@@ -205,4 +205,21 @@ void set_board_info_env(char *name);
  */
 void board_ti_set_ethaddr(int index);
 
+/**
+ * ti_i2c_eeprom_am_set() - Setup the eeprom data with predefined values
+ * @name:      Name of the board
+ * @rev:       Revision of the board
+ *
+ * In some cases such as in RTC-only mode, we are able to skip reading eeprom
+ * and wasting i2c based initialization time by using predefined flags for
+ * detecting what platform we are booting on. For those platforms, provide
+ * a handy function to pre-program information.
+ *
+ * NOTE: many eeprom information such as serial number, mac address etc is not
+ * available.
+ *
+ * Return: 0 if all went fine, else return error.
+ */
+int ti_i2c_eeprom_am_set(const char *name, const char *rev);
+
 #endif /* __BOARD_DETECT_H */