1 // SPDX-License-Identifier: GPL-2.0-only
10 #include "pinctrl-mcp23s08.h"
18  * Driver data holds all the per-chip data.
29 	struct spi_device *spi = to_spi_device(mcp->dev);  in mcp23sxx_spi_write()
30 	struct spi_message m;  in mcp23sxx_spi_write()  local
31 	struct spi_transfer t[2] = { { .tx_buf = &mcp->addr, .len = 1, },  in mcp23sxx_spi_write()
34 	spi_message_init(&m);  in mcp23sxx_spi_write()
35 	spi_message_add_tail(&t[0], &m);  in mcp23sxx_spi_write()
36 	spi_message_add_tail(&t[1], &m);  in mcp23sxx_spi_write()
38 	return spi_sync(spi, &m);  in mcp23sxx_spi_write()
46 	struct spi_device *spi = to_spi_device(mcp->dev);  in mcp23sxx_spi_gather_write()
47 	struct spi_message m;  in mcp23sxx_spi_gather_write()  local
48 	struct spi_transfer t[3] = { { .tx_buf = &mcp->addr, .len = 1, },  in mcp23sxx_spi_gather_write()
52 	spi_message_init(&m);  in mcp23sxx_spi_gather_write()
53 	spi_message_add_tail(&t[0], &m);  in mcp23sxx_spi_gather_write()
54 	spi_message_add_tail(&t[1], &m);  in mcp23sxx_spi_gather_write()
55 	spi_message_add_tail(&t[2], &m);  in mcp23sxx_spi_gather_write()
57 	return spi_sync(spi, &m);  in mcp23sxx_spi_gather_write()
64 	struct spi_device *spi = to_spi_device(mcp->dev);  in mcp23sxx_spi_read()
65 	u8 tx[2];  in mcp23sxx_spi_read()  local
68 		return -EINVAL;  in mcp23sxx_spi_read()
70 	tx[0] = mcp->addr | 0x01;  in mcp23sxx_spi_read()
71 	tx[1] = *((u8 *) reg);  in mcp23sxx_spi_read()
73 	return spi_write_then_read(spi, tx, sizeof(tx), val, val_size);  in mcp23sxx_spi_read()
91 		mcp->reg_shift = 0;  in mcp23s08_spi_regmap_init()
92 		mcp->chip.ngpio = 8;  in mcp23s08_spi_regmap_init()
93 		mcp->chip.label = devm_kasprintf(dev, GFP_KERNEL, "mcp23s08.%d", addr);  in mcp23s08_spi_regmap_init()
94 		if (!mcp->chip.label)  in mcp23s08_spi_regmap_init()
95 			return -ENOMEM;  in mcp23s08_spi_regmap_init()
100 			return -ENOMEM;  in mcp23s08_spi_regmap_init()
105 		mcp->reg_shift = 1;  in mcp23s08_spi_regmap_init()
106 		mcp->chip.ngpio = 16;  in mcp23s08_spi_regmap_init()
107 		mcp->chip.label = devm_kasprintf(dev, GFP_KERNEL, "mcp23s17.%d", addr);  in mcp23s08_spi_regmap_init()
108 		if (!mcp->chip.label)  in mcp23s08_spi_regmap_init()
109 			return -ENOMEM;  in mcp23s08_spi_regmap_init()
114 			return -ENOMEM;  in mcp23s08_spi_regmap_init()
119 		mcp->reg_shift = 1;  in mcp23s08_spi_regmap_init()
120 		mcp->chip.ngpio = 16;  in mcp23s08_spi_regmap_init()
121 		mcp->chip.label = "mcp23s18";  in mcp23s08_spi_regmap_init()
124 		name = config->name;  in mcp23s08_spi_regmap_init()
129 		return -EINVAL;  in mcp23s08_spi_regmap_init()
134 		return -ENOMEM;  in mcp23s08_spi_regmap_init()
136 	copy->name = name;  in mcp23s08_spi_regmap_init()
138 	mcp->regmap = devm_regmap_init(dev, &mcp23sxx_spi_regmap, mcp, copy);  in mcp23s08_spi_regmap_init()
139 	if (IS_ERR(mcp->regmap))  in mcp23s08_spi_regmap_init()
140 		dev_err(dev, "regmap init failed for %s\n", mcp->chip.label);  in mcp23s08_spi_regmap_init()
141 	return PTR_ERR_OR_ZERO(mcp->regmap);  in mcp23s08_spi_regmap_init()
146 	struct device *dev = &spi->dev;  in mcp23s08_probe()
161 		type = spi_get_device_id(spi)->driver_data;  in mcp23s08_probe()
163 	ret = device_property_read_u32(dev, "microchip,spi-present-mask", &v);  in mcp23s08_probe()
165 		ret = device_property_read_u32(dev, "mcp,spi-present-mask", &v);  in mcp23s08_probe()
167 			dev_err(dev, "missing spi-present-mask");  in mcp23s08_probe()
174 		dev_err(dev, "invalid spi-present-mask");  in mcp23s08_probe()
175 		return -ENODEV;  in mcp23s08_probe()
182 		return -ENOMEM;  in mcp23s08_probe()
187 		data->mcp[addr] = &data->chip[--chips];  in mcp23s08_probe()
188 		data->mcp[addr]->irq = spi->irq;  in mcp23s08_probe()
190 		ret = mcp23s08_spi_regmap_init(data->mcp[addr], dev, addr, type);  in mcp23s08_probe()
194 		data->mcp[addr]->pinctrl_desc.name = devm_kasprintf(dev, GFP_KERNEL,  in mcp23s08_probe()
195 								    "mcp23xxx-pinctrl.%d",  in mcp23s08_probe()
197 		if (!data->mcp[addr]->pinctrl_desc.name)  in mcp23s08_probe()
198 			return -ENOMEM;  in mcp23s08_probe()
200 		ret = mcp23s08_probe_one(data->mcp[addr], dev, 0x40 | (addr << 1), type, -1);  in mcp23s08_probe()
204 		ngpio += data->mcp[addr]->chip.ngpio;  in mcp23s08_probe()
206 	data->ngpio = ngpio;  in mcp23s08_probe()