1 // SPDX-License-Identifier: GPL-2.0-or-later
19  * spi_write - write command to the SPI port
21  * @data: can be 8/16/32-bit, MSB justified data to write.
27  *   %-ETIMEDOUT	timeout occurred
35 		*(void **) spi_controller_get_devdata(spi->controller);  in lcd_spi_write()
40 	switch (spi->bits_per_word) {  in lcd_spi_write()
51 		dev_err(&spi->dev, "Wrong spi bit length\n");  in lcd_spi_write()
64 		if (!--timeout) {  in lcd_spi_write()
65 			ret = -ETIMEDOUT;  in lcd_spi_write()
66 			dev_err(&spi->dev, "spi cmd send time out\n");  in lcd_spi_write()
84 		*(void **) spi_controller_get_devdata(spi->controller);  in lcd_spi_setup()
88 		CFG_TXBITS(spi->bits_per_word) |  in lcd_spi_setup()
112 	list_for_each_entry(t, &m->transfers, transfer_list) {  in lcd_spi_one_transfer()
113 		switch (spi->bits_per_word) {  in lcd_spi_one_transfer()
115 			for (i = 0; i < t->len; i++)  in lcd_spi_one_transfer()
116 				lcd_spi_write(spi, ((u8 *)t->tx_buf)[i]);  in lcd_spi_one_transfer()
119 			for (i = 0; i < t->len/2; i++)  in lcd_spi_one_transfer()
120 				lcd_spi_write(spi, ((u16 *)t->tx_buf)[i]);  in lcd_spi_one_transfer()
123 			for (i = 0; i < t->len/4; i++)  in lcd_spi_one_transfer()
124 				lcd_spi_write(spi, ((u32 *)t->tx_buf)[i]);  in lcd_spi_one_transfer()
127 			dev_err(&spi->dev, "Wrong spi bit length\n");  in lcd_spi_one_transfer()
131 	m->status = 0;  in lcd_spi_one_transfer()
132 	if (m->complete)  in lcd_spi_one_transfer()
133 		m->complete(m->context);  in lcd_spi_one_transfer()
143 	ctlr = spi_alloc_master(ctrl->dev, sizeof(void *));  in lcd_spi_register()
145 		dev_err(ctrl->dev, "unable to allocate SPI master\n");  in lcd_spi_register()
146 		return -ENOMEM;  in lcd_spi_register()
149 	*p_regbase = (void __force *)ctrl->reg_base;  in lcd_spi_register()
152 	ctlr->bus_num = 5;  in lcd_spi_register()
153 	ctlr->num_chipselect = 1;  in lcd_spi_register()
154 	ctlr->setup = lcd_spi_setup;  in lcd_spi_register()
155 	ctlr->transfer = lcd_spi_one_transfer;  in lcd_spi_register()
159 		dev_err(ctrl->dev, "unable to register SPI master\n");  in lcd_spi_register()
164 	dev_info(&ctlr->dev, "registered\n");  in lcd_spi_register()