[PATCH v2 05/22] memory: omap-gpmc: Add GPMC-NAND ops to get writebufferempty status
From: Roger Quadros <hidden>
Date: 2015-08-07 09:24:05
Also in:
linux-omap, lkml
Subsystem:
memory controller drivers, omap general purpose memory controller support, the rest · Maintainers:
Krzysztof Kozlowski, Roger Quadros, Tony Lindgren, Linus Torvalds
This is needed by OMAP NAND driver to poll the empty status of the writebuffer. Signed-off-by: Roger Quadros <redacted> --- 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 79d78ab..41df030 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)
@@ -1099,7 +1101,17 @@ 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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