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authorRoger Quadros <rogerq@ti.com>2015-08-05 13:34:50 +0300
committerRoger Quadros <rogerq@ti.com>2016-04-15 11:51:57 +0300
commit512d73d1c64f15da9cdcdcdfba3cd8db0d4d94cc (patch)
tree2c0723202a0e0660738da79342853fb43dd48b80 /drivers/memory
parentf47fcad63f6847ea677c6c7030f30fd6438e0052 (diff)
downloadlinux-512d73d1c64f15da9cdcdcdfba3cd8db0d4d94cc.tar.xz
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@ti.com> Acked-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'drivers/memory')
-rw-r--r--drivers/memory/omap-gpmc.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/drivers/memory/omap-gpmc.c b/drivers/memory/omap-gpmc.c
index 0b62afd86f7e..90dfba5a8f55 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