4 * Copyright (C) 2008 Atmel Corporation
5 * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
7 * SPDX-License-Identifier: GPL-2.0+
13 static int spi_flash_read_write(struct spi_slave *spi,
14 const u8 *cmd, size_t cmd_len,
15 const u8 *data_out, u8 *data_in,
18 unsigned long flags = SPI_XFER_BEGIN;
21 #ifdef CONFIG_SF_DUAL_FLASH
22 if (spi->flags & SPI_XFER_U_PAGE)
23 flags |= SPI_XFER_U_PAGE;
26 flags |= SPI_XFER_END;
28 ret = spi_xfer(spi, cmd_len * 8, cmd, NULL, flags);
30 debug("SF: Failed to send command (%zu bytes): %d\n",
32 } else if (data_len != 0) {
33 ret = spi_xfer(spi, data_len * 8, data_out, data_in,
36 debug("SF: Failed to transfer %zu bytes of data: %d\n",
43 int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
44 size_t cmd_len, void *data, size_t data_len)
46 return spi_flash_read_write(spi, cmd, cmd_len, NULL, data, data_len);
49 int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len)
51 return spi_flash_cmd_read(spi, &cmd, 1, response, len);
54 int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
55 const void *data, size_t data_len)
57 return spi_flash_read_write(spi, cmd, cmd_len, data, NULL, data_len);