This is needed by OMAP NAND driver to poll the empty status
of the writebuffer.
Signed-off-by: Roger Quadros <rogerq@xxxxxx>
---
drivers/memory/omap-gpmc.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/memory/omap-gpmc.c b/drivers/memory/omap-gpmc.c
index 0b62afd..90dfba5 100644
--- a/drivers/memory/omap-gpmc.c
+++ b/drivers/memory/omap-gpmc.c
@@ -81,6 +81,8 @@
#define GPMC_CONFIG_LIMITEDADDRESS BIT(1)
+#define GPMC_STATUS_EMPTYWRITEBUFFERSTATUS BIT(0)
+
#define GPMC_CONFIG2_CSEXTRADELAY BIT(7)
#define GPMC_CONFIG3_ADVEXTRADELAY BIT(7)
#define GPMC_CONFIG4_OEEXTRADELAY BIT(7)
@@ -1118,7 +1120,17 @@ void gpmc_update_nand_reg(struct gpmc_nand_regs *reg, int cs)
}
}
-static struct gpmc_nand_ops nand_ops;
+static bool gpmc_nand_writebuffer_empty(void)
+{
+ if (gpmc_read_reg(GPMC_STATUS) & GPMC_STATUS_EMPTYWRITEBUFFERSTATUS)
+ return true;
+
+ return false;
+}
+
+static struct gpmc_nand_ops nand_ops = {
+ .nand_writebuffer_empty = gpmc_nand_writebuffer_empty,
+};
/**
* gpmc_omap_get_nand_ops - Get the GPMC NAND interface
--
2.5.0
--
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