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[v5,05/26] memory: omap-gpmc: Add GPMC-NAND ops to get writebufferempty status

Message ID 1455916548-3441-6-git-send-email-rogerq@ti.com
State Superseded
Headers show

Commit Message

Roger Quadros Feb. 19, 2016, 9:15 p.m. UTC 
This is needed by OMAP NAND driver to poll the empty status
of the writebuffer.

Signed-off-by: Roger Quadros <rogerq@ti.com>

---
 drivers/memory/omap-gpmc.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

-- 
2.1.4


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Patch

diff --git a/drivers/memory/omap-gpmc.c b/drivers/memory/omap-gpmc.c
index c2f7320..695be32 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)
@@ -1098,7 +1100,17 @@  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