1 // SPDX-License-Identifier: GPL-2.0-only
3  * ST Microelectronics MFD: stmpe's spi client specific driver
10 #include <linux/spi/spi.h>
22 	struct spi_device *spi = stmpe->client;  in spi_reg_read()  local
23 	int status = spi_w8r16(spi, reg | READ_CMD);  in spi_reg_read()
30 	struct spi_device *spi = stmpe->client;  in spi_reg_write()  local
33 	return spi_write(spi, (const u8 *)&cmd, 2);  in spi_reg_write()
55 	for (i = length; i > 0; i--, reg++) {  in spi_block_write()
56 		ret = spi_reg_write(stmpe, reg, *(values + i - 1));  in spi_block_write()
66 	struct spi_device *spi = stmpe->client;  in spi_init()  local
68 	spi->bits_per_word = 8;  in spi_init()
71 	if (stmpe->variant->id_val == 0x0811)  in spi_init()
72 		spi_reg_write(stmpe, STMPE811_REG_SPI_CFG, spi->mode);  in spi_init()
74 	if (spi_setup(spi) < 0)  in spi_init()
75 		dev_dbg(&spi->dev, "spi_setup failed\n");  in spi_init()
87 stmpe_spi_probe(struct spi_device *spi)  in stmpe_spi_probe()  argument
89 	const struct spi_device_id *id = spi_get_device_id(spi);  in stmpe_spi_probe()
91 	/* don't exceed max specified rate - 1MHz - Limitation of STMPE */  in stmpe_spi_probe()
92 	if (spi->max_speed_hz > 1000000) {  in stmpe_spi_probe()
93 		dev_dbg(&spi->dev, "f(sample) %d KHz?\n",  in stmpe_spi_probe()
94 				(spi->max_speed_hz/1000));  in stmpe_spi_probe()
95 		return -EINVAL;  in stmpe_spi_probe()
98 	spi_ci.irq = spi->irq;  in stmpe_spi_probe()
99 	spi_ci.client = spi;  in stmpe_spi_probe()
100 	spi_ci.dev = &spi->dev;  in stmpe_spi_probe()
102 	return stmpe_probe(&spi_ci, id->driver_data);  in stmpe_spi_probe()
105 static void stmpe_spi_remove(struct spi_device *spi)  in stmpe_spi_remove()  argument
107 	struct stmpe *stmpe = spi_get_drvdata(spi);  in stmpe_spi_remove()
113 	{ .compatible = "st,stmpe610", },
114 	{ .compatible = "st,stmpe801", },
115 	{ .compatible = "st,stmpe811", },
116 	{ .compatible = "st,stmpe1601", },
117 	{ .compatible = "st,stmpe2401", },
118 	{ .compatible = "st,stmpe2403", },
132 MODULE_DEVICE_TABLE(spi, stmpe_id);
136 		.name	= "stmpe-spi",
157 MODULE_DESCRIPTION("STMPE MFD SPI Interface Driver");