The kernel from Freescale expects that the bootloader passes the board revision.
Read the board revision and pass it via get_board_rev().
Without passing the board revision the kernel does not operate properly as the
initialization of peripherals are different in revA versus revB boards.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
+/* OCOTP Registers */
+struct ocotp_regs {
+ u32 reserved[0x198];
+ u32 gp1; /* 0x660 */
+};
+
/* GPR3 bitfields */
#define IOMUXC_GPR3_GPU_DBG_OFFSET 29
#define IOMUXC_GPR3_GPU_DBG_MASK (3<<IOMUXC_GPR3_GPU_DBG_OFFSET)
/* GPR3 bitfields */
#define IOMUXC_GPR3_GPU_DBG_OFFSET 29
#define IOMUXC_GPR3_GPU_DBG_MASK (3<<IOMUXC_GPR3_GPU_DBG_OFFSET)
#include <fsl_esdhc.h>
#include <miiphy.h>
#include <netdev.h>
#include <fsl_esdhc.h>
#include <miiphy.h>
#include <netdev.h>
+#include <asm/arch/sys_proto.h>
+
DECLARE_GLOBAL_DATA_PTR;
#define UART_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE | \
DECLARE_GLOBAL_DATA_PTR;
#define UART_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE | \
+#define BOARD_REV_B 0x200
+#define BOARD_REV_A 0x100
+
+static int mx6sabre_rev(void)
+{
+ /*
+ * Get Board ID information from OCOTP_GP1[15:8]
+ * i.MX6Q ARD RevA: 0x01
+ * i.MX6Q ARD RevB: 0x02
+ */
+ struct ocotp_regs *ocotp = (struct ocotp_regs *)OCOTP_BASE_ADDR;
+ int reg = readl(&ocotp->gp1);
+ int ret;
+
+ switch (reg >> 8 & 0x0F) {
+ case 0x02:
+ ret = BOARD_REV_B;
+ break;
+ case 0x01:
+ default:
+ ret = BOARD_REV_A;
+ break;
+ }
+
+ return ret;
+}
+
u32 get_board_rev(void)
{
u32 get_board_rev(void)
{
+ int rev = mx6sabre_rev();
+
+ return (get_cpu_rev() & ~(0xF << 8)) | rev;
}
int board_early_init_f(void)
}
int board_early_init_f(void)
- puts("Board: MX6Q-Sabreauto\n");
+ int rev = mx6sabre_rev();
+ char *revname;
+
+ switch (rev) {
+ case BOARD_REV_B:
+ revname = "B";
+ break;
+ case BOARD_REV_A:
+ default:
+ revname = "A";
+ break;
+ }
+
+ printf("Board: MX6Q-Sabreauto rev%s\n", revname);