1 // SPDX-License-Identifier: GPL-2.0
4 * Sony CXD2880 DVB-T2/T tuner + demodulator driver
7 * Copyright (C) 2016, 2017, 2018 Sony Semiconductor Solutions Corporation
10 #include <linux/spi/spi.h>
12 #include "cxd2880_spi_device.h"
14 static int cxd2880_spi_device_write(struct cxd2880_spi *spi,
15 const u8 *data, u32 size)
17 struct cxd2880_spi_device *spi_device = NULL;
18 struct spi_message msg;
19 struct spi_transfer tx;
22 if (!spi || !spi->user || !data || size == 0)
25 spi_device = spi->user;
27 memset(&tx, 0, sizeof(tx));
31 spi_message_init(&msg);
32 spi_message_add_tail(&tx, &msg);
33 result = spi_sync(spi_device->spi, &msg);
41 static int cxd2880_spi_device_write_read(struct cxd2880_spi *spi,
47 struct cxd2880_spi_device *spi_device = NULL;
50 if (!spi || !spi->user || !tx_data ||
51 !tx_size || !rx_data || !rx_size)
54 spi_device = spi->user;
56 result = spi_write_then_read(spi_device->spi, tx_data,
57 tx_size, rx_data, rx_size);
65 cxd2880_spi_device_initialize(struct cxd2880_spi_device *spi_device,
66 enum cxd2880_spi_mode mode,
70 struct spi_device *spi = spi_device->spi;
73 case CXD2880_SPI_MODE_0:
74 spi->mode = SPI_MODE_0;
76 case CXD2880_SPI_MODE_1:
77 spi->mode = SPI_MODE_1;
79 case CXD2880_SPI_MODE_2:
80 spi->mode = SPI_MODE_2;
82 case CXD2880_SPI_MODE_3:
83 spi->mode = SPI_MODE_3;
89 spi->max_speed_hz = speed_hz;
90 spi->bits_per_word = 8;
91 result = spi_setup(spi);
93 pr_err("spi_setup failed %d\n", result);
100 int cxd2880_spi_device_create_spi(struct cxd2880_spi *spi,
101 struct cxd2880_spi_device *spi_device)
103 if (!spi || !spi_device)
107 spi->write = cxd2880_spi_device_write;
108 spi->write_read = cxd2880_spi_device_write_read;
110 spi->user = spi_device;