zynq: Add support to store environment in EEPROM

Added support to store environment in EEPROM.
Set the mux to select EEPROM during board init so
that the env can be read from EEPROM later.

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/board/xilinx/zynq/board.c b/board/xilinx/zynq/board.c
index 52fbeb880636568a3999e8dd7bb493ab19ca386e..037154a5f9bad46204b96f79a2376d348fb60b8f 100644 (file)
--- a/board/xilinx/zynq/board.c
+++ b/board/xilinx/zynq/board.c
@@ -28,6 +28,9 @@ Xilinx_desc fpga100 = XILINX_XC7Z100_DESC(0x100);
 
 int board_init(void)
 {
+#if defined(CONFIG_ENV_IS_IN_EEPROM) && !defined(CONFIG_SPL_BUILD)
+       unsigned char eepromsel = CONFIG_SYS_I2C_MUX_EEPROM_SEL;
+#endif
 #ifdef CONFIG_FPGA
        u32 idcode;
 
@@ -64,6 +67,10 @@ int board_init(void)
     (defined(CONFIG_SPL_FPGA_SUPPORT) && defined(CONFIG_SPL_BUILD))
        fpga_init();
        fpga_add(fpga_xilinx, &fpga);
+#endif
+#if defined(CONFIG_ENV_IS_IN_EEPROM) && !defined(CONFIG_SPL_BUILD)
+       if (eeprom_write(CONFIG_SYS_I2C_MUX_ADDR, 0, &eepromsel, 1))
+               puts("I2C:EEPROM selection failed\n");
 #endif
        return 0;
 }

diff --git a/include/configs/zynq-common.h b/include/configs/zynq-common.h
index 662a4784e128adeebdece3c6a2e24a14f373253f..c0d24a3e16ec866c38282b4d822da0c0e89528c2 100644 (file)
--- a/include/configs/zynq-common.h
+++ b/include/configs/zynq-common.h
@@ -147,6 +147,8 @@
 # define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS     4
 # define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS 5
 # define CONFIG_SYS_EEPROM_SIZE                        1024 /* Bytes */
+# define CONFIG_SYS_I2C_MUX_ADDR               0x74
+# define CONFIG_SYS_I2C_MUX_EEPROM_SEL         0x4
 #endif
 
 /* Total Size of Environment Sector */