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| author | Roger Quadros <rogerq@ti.com> | 2015-08-05 12:34:50 +0200 |
|---|---|---|
| committer | Roger Quadros <rogerq@ti.com> | 2016-04-15 10:51:57 +0200 |
| commit | 512d73d1c64f15da9cdcdcdfba3cd8db0d4d94cc (patch) | |
| tree | 2c0723202a0e0660738da79342853fb43dd48b80 /drivers/memory/omap-gpmc.c | |
| parent | memory: omap-gpmc: Introduce GPMC to NAND interface (diff) | |
| download | linux-512d73d1c64f15da9cdcdcdfba3cd8db0d4d94cc.tar.xz linux-512d73d1c64f15da9cdcdcdfba3cd8db0d4d94cc.zip | |
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/omap-gpmc.c')
| -rw-r--r-- | drivers/memory/omap-gpmc.c | 14 |
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 |