1 // SPDX-License-Identifier: GPL-2.0+
5 * Copyright (C) 2008 Atmel Corporation
6 * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
12 static int spi_flash_read_write(struct spi_slave *spi,
13 const u8 *cmd, size_t cmd_len,
14 const u8 *data_out, u8 *data_in,
17 unsigned long flags = SPI_XFER_BEGIN;
21 flags |= SPI_XFER_END;
23 ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
25 debug("SF: Failed to send command (%zu bytes): %d\n",
27 } else if (data_len != 0) {
28 ret = spi_xfer(spi, data_len * 8, data_out, data_in,
31 debug("SF: Failed to transfer %zu bytes of data: %d\n",
38 int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
39 size_t cmd_len, void *data, size_t data_len)
41 return spi_flash_read_write(spi, cmd, cmd_len, NULL, data, data_len);
44 int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len)
46 return spi_flash_cmd_read(spi, &cmd, 1, response, len);
49 int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
50 const void *data, size_t data_len)
52 return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);