From 512d73d1c64f15da9cdcdcdfba3cd8db0d4d94cc Mon Sep 17 00:00:00 2001 From: Roger Quadros Date: Wed, 5 Aug 2015 13:34:50 +0300 Subject: [PATCH] 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 Acked-by: Tony Lindgren --- 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 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 -- 2.39.5