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60e2bf4678
Some SPI controllers can't write nor->page_size bytes in a single step
because their TX FIFO is too small, but when that happens we should
make sure a WRITE_EN command before each write access and READ_SR command
after each write access is issued.
We should allow nor->write() to return a size that is smaller than the
requested write size to gracefully handle this case.
Also, the spi_nor_write_data() should return the actual number of bytes
that were written during the spi_mem_exec_op() operation.
This patch is a combination of two commits backported from kernel:
commit 630d6bd8a3b4 ("mtd: spi-nor: Support controllers with limit ...")
commit 3baa8ec88c2f ("mtd: devices: m25p80: Make sure WRITE_EN is ...")
Cc: Vignesh R <vigneshr@ti.com>
Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
Acked-by: Vignesh R <vigneshr@ti.com>
Tested-by: Shyam Saini <shyam.saini@amarulasolutions.com> # microzed
Acked-by: Jagan Teki <jagan@amarulasolutions.com>
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|---|---|---|
| .. | ||
| fsl_espi_spl.c | ||
| Kconfig | ||
| Makefile | ||
| sandbox.c | ||
| sf_dataflash.c | ||
| sf_internal.h | ||
| sf_mtd.c | ||
| sf_probe.c | ||
| sf-uclass.c | ||
| sf.c | ||
| spi-nor-core.c | ||
| spi-nor-ids.c | ||
| spi-nor-tiny.c | ||