MIPS: TXx9: Add mtd support

Add helper routines to register physmap-flash platform devices for NOR
flashes.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/arch/mips/txx9/generic/setup_tx3927.c b/arch/mips/txx9/generic/setup_tx3927.c
index 06c492576078..9505d58454c8 100644
--- a/arch/mips/txx9/generic/setup_tx3927.c
+++ b/arch/mips/txx9/generic/setup_tx3927.c
@@ -15,6 +15,7 @@
 #include <linux/delay.h>
 #include <linux/param.h>
 #include <linux/io.h>
+#include <linux/mtd/physmap.h>
 #include <asm/mipsregs.h>
 #include <asm/txx9irq.h>
 #include <asm/txx9tmr.h>
@@ -121,3 +122,16 @@ void __init tx3927_sio_init(unsigned int sclk, unsigned int cts_mask)
                               TXX9_IRQ_BASE + TX3927_IR_SIO(i),
                               i, sclk, (1 << i) & cts_mask);
 }
+
+void __init tx3927_mtd_init(int ch)
+{
+        struct physmap_flash_data pdata = {
+                .width = TX3927_ROMC_WIDTH(ch) / 8,
+        };
+        unsigned long start = txx9_ce_res[ch].start;
+        unsigned long size = txx9_ce_res[ch].end - start + 1;
+
+        if (!(tx3927_romcptr->cr[ch] & 0x8))
+                return; /* disabled */
+        txx9_physmap_flash_init(ch, start, size, &pdata);
+}