1 // SPDX-License-Identifier: GPL-2.0-only
3  * Cavium ThunderX SPI driver.
11 #include <linux/spi/spi.h>
13 #include "spi-cavium.h"
15 #define DRV_NAME "spi-thunderx"
22 	struct device *dev = &pdev->dev;  in thunderx_spi_probe()
29 		return -ENOMEM;  in thunderx_spi_probe()
41 	p->register_base = pcim_iomap(pdev, 0, pci_resource_len(pdev, 0));  in thunderx_spi_probe()
42 	if (!p->register_base) {  in thunderx_spi_probe()
43 		ret = -EINVAL;  in thunderx_spi_probe()
47 	p->regs.config = 0x1000;  in thunderx_spi_probe()
48 	p->regs.status = 0x1008;  in thunderx_spi_probe()
49 	p->regs.tx = 0x1010;  in thunderx_spi_probe()
50 	p->regs.data = 0x1080;  in thunderx_spi_probe()
52 	p->clk = devm_clk_get_enabled(dev, NULL);  in thunderx_spi_probe()
53 	if (IS_ERR(p->clk)) {  in thunderx_spi_probe()
54 		ret = PTR_ERR(p->clk);  in thunderx_spi_probe()
58 	p->sys_freq = clk_get_rate(p->clk);  in thunderx_spi_probe()
59 	if (!p->sys_freq)  in thunderx_spi_probe()
60 		p->sys_freq = SYS_FREQ_DEFAULT;  in thunderx_spi_probe()
61 	dev_info(dev, "Set system clock to %u\n", p->sys_freq);  in thunderx_spi_probe()
63 	host->flags = SPI_CONTROLLER_HALF_DUPLEX;  in thunderx_spi_probe()
64 	host->num_chipselect = 4;  in thunderx_spi_probe()
65 	host->mode_bits = SPI_CPHA | SPI_CPOL | SPI_CS_HIGH |  in thunderx_spi_probe()
67 	host->transfer_one_message = octeon_spi_transfer_one_message;  in thunderx_spi_probe()
68 	host->bits_per_word_mask = SPI_BPW_MASK(8);  in thunderx_spi_probe()
69 	host->max_speed_hz = OCTEON_SPI_MAX_CLOCK_HZ;  in thunderx_spi_probe()
70 	host->dev.of_node = pdev->dev.of_node;  in thunderx_spi_probe()
95 	writeq(0, p->register_base + OCTEON_SPI_CFG(p));  in thunderx_spi_remove()
114 MODULE_DESCRIPTION("Cavium, Inc. ThunderX SPI bus driver");