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spi: spi-mem: Extend spi_mem_adjust_op_size() to honor max xfer size
Extend spi_mem_adjust_op_size() to take spi->max_write_size and spi->max_read_size into account. Signed-off-by: Vignesh R <vigneshr@ti.com> Tested-by: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> Tested-by: Stefan Roese <sr@denx.de> Tested-by: Horatiu Vultur <horatiu.vultur@microchip.com> Reviewed-by: Jagan Teki <jagan@openedev.com> Tested-by: Jagan Teki <jagan@amarulasolutions.com> #zynq-microzed
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@ -412,6 +412,25 @@ int spi_mem_adjust_op_size(struct spi_slave *slave, struct spi_mem_op *op)
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if (ops->mem_ops && ops->mem_ops->adjust_op_size)
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if (ops->mem_ops && ops->mem_ops->adjust_op_size)
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return ops->mem_ops->adjust_op_size(slave, op);
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return ops->mem_ops->adjust_op_size(slave, op);
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if (!ops->mem_ops || !ops->mem_ops->exec_op) {
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unsigned int len;
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len = sizeof(op->cmd.opcode) + op->addr.nbytes +
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op->dummy.nbytes;
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if (slave->max_write_size && len > slave->max_write_size)
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return -EINVAL;
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if (op->data.dir == SPI_MEM_DATA_IN && slave->max_read_size)
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op->data.nbytes = min(op->data.nbytes,
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slave->max_read_size);
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else if (slave->max_write_size)
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op->data.nbytes = min(op->data.nbytes,
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slave->max_write_size - len);
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if (!op->data.nbytes)
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return -EINVAL;
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}
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return 0;
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return 0;
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}
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}
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EXPORT_SYMBOL_GPL(spi_mem_adjust_op_size);
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EXPORT_SYMBOL_GPL(spi_mem_adjust_op_size);
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