From: Priyanka Jain <priyanka.j...@freescale.com>
PCA9557 is parallel I/O expansion device on I2C bus which stores various
board switch settings like NOR Flash-Bank selection, SD Data width.
On board:
switch SW5[6] is to select width for eSDHC
ON - 4-bit [Enable eSPI]
OFF - 8-bit [Disable eSPI]
switch SW4[8] is to select NOR Flash Bank for Booting
OFF - Primary Bank
ON - Secondary Bank
Read board switch settings on p1_p2_rdb and configure corresponding
eSDHC width.
Signed-off-by: Priyanka Jain <priyanka.j...@freescale.com>
Signed-off-by: Dipen Dudhat <dipen.dud...@freescale.com>
Signed-off-by: Kumar Gala <ga...@kernel.crashing.org>
---
board/freescale/p1_p2_rdb/p1_p2_rdb.c | 25 +++++++++++++++++++++++++
include/configs/P1_P2_RDB.h | 2 ++
2 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/board/freescale/p1_p2_rdb/p1_p2_rdb.c
b/board/freescale/p1_p2_rdb/p1_p2_rdb.c
index 806d90e..9f57a21 100644
--- a/board/freescale/p1_p2_rdb/p1_p2_rdb.c
+++ b/board/freescale/p1_p2_rdb/p1_p2_rdb.c
@@ -35,6 +35,7 @@
#include <vsc7385.h>
#include <netdev.h>
#include <rtc.h>
+#include <i2c.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -142,6 +143,30 @@ int board_early_init_r(void)
{
const unsigned int flashbase = CONFIG_SYS_FLASH_BASE;
const u8 flash_esel = find_tlb_idx((void *)flashbase, 1);
+ volatile ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+ unsigned int orig_bus = i2c_get_bus_num();
+ u8 i2c_data;
+
+ i2c_set_bus_num(1);
+ if (i2c_read(CONFIG_SYS_I2C_PCA9557_ADDR, 0,
+ 1, &i2c_data, sizeof(i2c_data)) == 0) {
+ if (i2c_data & 0x2)
+ puts("NOR Flash Bank : Secondary\n");
+ else
+ puts("NOR Flash Bank : Primary\n");
+
+ if (i2c_data & 0x1) {
+ setbits_be32(&gur->pmuxcr, MPC85xx_PMUXCR_SD_DATA);
+ puts("SD/MMC : 8-bit Mode\n");
+ puts("eSPI : Disabled\n");
+ } else {
+ puts("SD/MMC : 4-bit Mode\n");
+ puts("eSPI : Enabled\n");
+ }
+ } else {
+ puts("Failed reading I2C Chip 0x18 on bus 1\n");
+ }
+ i2c_set_bus_num(orig_bus);
/*
* Remap Boot flash region to caching-inhibited
diff --git a/include/configs/P1_P2_RDB.h b/include/configs/P1_P2_RDB.h
index 23b8afa..d601fcd 100644
--- a/include/configs/P1_P2_RDB.h
+++ b/include/configs/P1_P2_RDB.h
@@ -362,6 +362,8 @@ extern unsigned long get_board_sys_clk(unsigned long dummy);
#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1
#define CONFIG_SYS_EEPROM_BUS_NUM 1
+#define CONFIG_SYS_I2C_PCA9557_ADDR 0x18
+
#define CONFIG_RTC_DS1337
#define CONFIG_SYS_RTC_DS1337_NOOSC
#define CONFIG_SYS_I2C_RTC_ADDR 0x68
--
1.7.2.3
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