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Message-ID: <1455916548-3441-6-git-send-email-rogerq@ti.com>
Date: Fri, 19 Feb 2016 23:15:27 +0200
From: Roger Quadros <rogerq@...com>
To: <tony@...mide.com>, <computersforpeace@...il.com>
CC: <dwmw2@...radead.org>, <ezequiel@...guardiasur.com.ar>,
<javier@...hile0.org>, <fcooper@...com>, <nsekhar@...com>,
<linux-mtd@...ts.infradead.org>, <linux-omap@...r.kernel.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
Roger Quadros <rogerq@...com>
Subject: [PATCH v5 05/26] memory: omap-gpmc: Add GPMC-NAND ops to get writebufferempty status
This is needed by OMAP NAND driver to poll the empty status
of the writebuffer.
Signed-off-by: Roger Quadros <rogerq@...com>
---
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 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
--
2.1.4
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