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authorLei Wen <leiwen@marvell.com>2011-07-15 07:44:33 +0400
committerArtem Bityutskiy <artem.bityutskiy@intel.com>2011-09-11 16:02:15 +0400
commitf3c8cfc237927cc095e8bcb1e3794cfa76390bab (patch)
tree476cb4cde208ef3a661236093f57e1d444f3ce2d /arch/arm/plat-pxa
parentd456882b41b84eba5e729cf78757b8ed95572362 (diff)
downloadlinux-f3c8cfc237927cc095e8bcb1e3794cfa76390bab.tar.xz
mtd: pxa3xx_nand: enable multiple chip select support
Current pxa3xx_nand controller has two chip select which both be workable. This patch enable this feature. Update platform driver to support this feature. Another notice should be taken that: When you want to use this feature, you should not enable the keep configuration feature, for two chip select could be attached with different nand chip. The different page size and timing requirement make the keep configuration impossible. Signed-off-by: Lei Wen <leiwen@marvell.com>
Diffstat (limited to 'arch/arm/plat-pxa')
-rw-r--r--arch/arm/plat-pxa/include/plat/pxa3xx_nand.h20
1 files changed, 18 insertions, 2 deletions
diff --git a/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h b/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
index 442301fe48b4..c42f39f20195 100644
--- a/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
+++ b/arch/arm/plat-pxa/include/plat/pxa3xx_nand.h
@@ -41,6 +41,19 @@ struct pxa3xx_nand_flash {
struct pxa3xx_nand_timing *timing; /* NAND Flash timing */
};
+/*
+ * Current pxa3xx_nand controller has two chip select which
+ * both be workable.
+ *
+ * Notice should be taken that:
+ * When you want to use this feature, you should not enable the
+ * keep configuration feature, for two chip select could be
+ * attached with different nand chip. The different page size
+ * and timing requirement make the keep configuration impossible.
+ */
+
+/* The max num of chip select current support */
+#define NUM_CHIP_SELECT (2)
struct pxa3xx_nand_platform_data {
/* the data flash bus is shared between the Static Memory
@@ -52,8 +65,11 @@ struct pxa3xx_nand_platform_data {
/* allow platform code to keep OBM/bootloader defined NFC config */
int keep_config;
- const struct mtd_partition *parts;
- unsigned int nr_parts;
+ /* indicate how many chip selects will be used */
+ int num_cs;
+
+ const struct mtd_partition *parts[NUM_CHIP_SELECT];
+ unsigned int nr_parts[NUM_CHIP_SELECT];
const struct pxa3xx_nand_flash * flash;
size_t num_flash;