mtd: rawnand: davinci: store the core chipselect number in platform data

We have the 'ti,davinci-chipselect' property in the device tree, but
when using platform data the driver silently uses the id field of
struct platform_device as the chipselect. This is confusing and we
almost broke the nand support again recently after converting the
platform to common clock framework (which changed the device id in the
clock lookup - the problem is gone now that we no longer acquire the
clock in the nand driver.

This patch adds a new field - core_chipsel - to the platform_data.
Subsequent patches will convert the platforms to using this new field.

Acked-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

diff --git a/include/linux/platform_data/mtd-davinci.h b/include/linux/platform_data/mtd-davinci.h
index f1a2cf655bdb5895c5b8ea1a66efbe5724b76629..1bbfa27cccb41449d9811ae345e27d329959dc0d 100644 (file)
--- a/include/linux/platform_data/mtd-davinci.h
+++ b/include/linux/platform_data/mtd-davinci.h
@@ -56,6 +56,16 @@ struct davinci_nand_pdata {          /* platform_data */
        uint32_t                mask_ale;
        uint32_t                mask_cle;
 
+       /*
+        * 0-indexed chip-select number of the asynchronous
+        * interface to which the NAND device has been connected.
+        *
+        * So, if you have NAND connected to CS3 of DA850, you
+        * will pass '1' here. Since the asynchronous interface
+        * on DA850 starts from CS2.
+        */
+       uint32_t                core_chipsel;
+
        /* for packages using two chipselects */
        uint32_t                mask_chipsel;