For the NAND chips on the TQM8548 modules, a special chip-select logic is used. It uses dedicated address lines to be controlled via UPM machine address register (mar). This patch adds corresponding support to the FSL-UPM driver.
Signed-off-by: Wolfgang Grandegger wg@grandegger.com --- drivers/mtd/nand/fsl_upm.c | 5 ++++- include/linux/mtd/fsl_upm.h | 1 + 2 files changed, 5 insertions(+), 1 deletion(-)
Index: u-boot/drivers/mtd/nand/fsl_upm.c =================================================================== --- u-boot.orig/drivers/mtd/nand/fsl_upm.c +++ u-boot/drivers/mtd/nand/fsl_upm.c @@ -90,8 +90,11 @@ static void fun_cmd_ctrl(struct mtd_info mar = cmd << (32 - fun->width); io_addr = fun->upm.io_addr; #if NAND_MAX_CHIPS > 1 - if (fun->chip_nr > 0) + if (fun->chip_nr > 0) { io_addr += fun->chip_offset * fun->chip_nr; + if (fun->upm_mar_chip_offset) + mar |= fun->upm_mar_chip_offset * fun->chip_nr; + } #endif fsl_upm_run_pattern(&fun->upm, fun->width, io_addr, mar);
Index: u-boot/include/linux/mtd/fsl_upm.h =================================================================== --- u-boot.orig/include/linux/mtd/fsl_upm.h +++ u-boot/include/linux/mtd/fsl_upm.h @@ -28,6 +28,7 @@ struct fsl_upm_nand { int width; int upm_cmd_offset; int upm_addr_offset; + int upm_mar_chip_offset; int wait_pattern; int (*dev_ready)(int chip_nr); int chip_delay;