1 // SPDX-License-Identifier: GPL-2.0-or-later
15 #include <linux/dma-mapping.h>
28 #include "spi-fsl-lib.h"
33 	type *rx = mpc8xxx_spi->rx;					  \
34 	*rx++ = (type)(data >> mpc8xxx_spi->rx_shift);			  \
35 	mpc8xxx_spi->rx = rx;						  \
43 	const type *tx = mpc8xxx_spi->tx;			\
46 	data = *tx++ << mpc8xxx_spi->tx_shift;			\
47 	mpc8xxx_spi->tx = tx;					\
75 			return "CPM1";  in mpc8xxx_spi_strmode()
90 	/* the spi->mode bits understood by this driver: */  in mpc8xxx_spi_probe()
91 	master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH  in mpc8xxx_spi_probe()
94 	master->dev.of_node = dev->of_node;  in mpc8xxx_spi_probe()
97 	mpc8xxx_spi->dev = dev;  in mpc8xxx_spi_probe()
98 	mpc8xxx_spi->get_rx = mpc8xxx_spi_rx_buf_u8;  in mpc8xxx_spi_probe()
99 	mpc8xxx_spi->get_tx = mpc8xxx_spi_tx_buf_u8;  in mpc8xxx_spi_probe()
100 	mpc8xxx_spi->flags = pdata->flags;  in mpc8xxx_spi_probe()
101 	mpc8xxx_spi->spibrg = pdata->sysclk;  in mpc8xxx_spi_probe()
102 	mpc8xxx_spi->irq = irq;  in mpc8xxx_spi_probe()
104 	mpc8xxx_spi->rx_shift = 0;  in mpc8xxx_spi_probe()
105 	mpc8xxx_spi->tx_shift = 0;  in mpc8xxx_spi_probe()
107 	master->bus_num = pdata->bus_num;  in mpc8xxx_spi_probe()
108 	master->num_chipselect = pdata->max_chipselect;  in mpc8xxx_spi_probe()
110 	init_completion(&mpc8xxx_spi->done);  in mpc8xxx_spi_probe()
116 	struct device *dev = &ofdev->dev;  in of_mpc8xxx_spi_probe()
117 	struct device_node *np = ofdev->dev.of_node;  in of_mpc8xxx_spi_probe()
121 	int ret = -ENOMEM;  in of_mpc8xxx_spi_probe()
123 	pinfo = devm_kzalloc(&ofdev->dev, sizeof(*pinfo), GFP_KERNEL);  in of_mpc8xxx_spi_probe()
127 	pdata = &pinfo->pdata;  in of_mpc8xxx_spi_probe()
128 	dev->platform_data = pdata;  in of_mpc8xxx_spi_probe()
131 	pdata->bus_num = -1;  in of_mpc8xxx_spi_probe()
135 	pdata->sysclk = get_brgfreq();  in of_mpc8xxx_spi_probe()
136 	if (pdata->sysclk == -1) {  in of_mpc8xxx_spi_probe()
137 		pdata->sysclk = fsl_get_sys_freq();  in of_mpc8xxx_spi_probe()
138 		if (pdata->sysclk == -1)  in of_mpc8xxx_spi_probe()
139 			return -ENODEV;  in of_mpc8xxx_spi_probe()
142 	ret = of_property_read_u32(np, "clock-frequency", &pdata->sysclk);  in of_mpc8xxx_spi_probe()
148 	if (prop && !strcmp(prop, "cpu-qe"))  in of_mpc8xxx_spi_probe()
149 		pdata->flags = SPI_QE_CPU_MODE;  in of_mpc8xxx_spi_probe()
151 		pdata->flags = SPI_CPM_MODE | SPI_QE;  in of_mpc8xxx_spi_probe()
152 	else if (of_device_is_compatible(np, "fsl,cpm2-spi"))  in of_mpc8xxx_spi_probe()
153 		pdata->flags = SPI_CPM_MODE | SPI_CPM2;  in of_mpc8xxx_spi_probe()
154 	else if (of_device_is_compatible(np, "fsl,cpm1-spi"))  in of_mpc8xxx_spi_probe()
155 		pdata->flags = SPI_CPM_MODE | SPI_CPM1;  in of_mpc8xxx_spi_probe()