Add support for TQM-specific chip select logic to FSL-UPM

For the NAND chips on the TQM8548 modules, a special chip-select logic is
used. It uses dedicated address lines to be set via UPM machine address
register (mar). This patch adds such support to the FSL-UPM driver.

Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>

drivers/mtd/nand/fsl_upm.c

@@ -90,8 +90,11 @@ static void fun_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
 	mar = cmd << (32 - fun->width);
 	io_addr = fun->upm.io_addr;
 #if CONFIG_SYS_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);
 

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;