^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* MCP23S08 I2C GPIO driver */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/mod_devicetable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include "pinctrl-mcp23s08.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) static int mcp230xx_probe(struct i2c_client *client, const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) struct device *dev = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) unsigned int type = id->driver_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) struct mcp23s08 *mcp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) mcp = devm_kzalloc(dev, sizeof(*mcp), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) if (!mcp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) case MCP_TYPE_008:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) mcp->regmap = devm_regmap_init_i2c(client, &mcp23x08_regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) mcp->reg_shift = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) mcp->chip.ngpio = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) mcp->chip.label = "mcp23008";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) case MCP_TYPE_017:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) mcp->regmap = devm_regmap_init_i2c(client, &mcp23x17_regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) mcp->reg_shift = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) mcp->chip.ngpio = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) mcp->chip.label = "mcp23017";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) case MCP_TYPE_018:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) mcp->regmap = devm_regmap_init_i2c(client, &mcp23x17_regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) mcp->reg_shift = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) mcp->chip.ngpio = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) mcp->chip.label = "mcp23018";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) dev_err(dev, "invalid device type (%d)\n", type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (IS_ERR(mcp->regmap))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return PTR_ERR(mcp->regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) mcp->irq = client->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) mcp->pinctrl_desc.name = "mcp23xxx-pinctrl";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) ret = mcp23s08_probe_one(mcp, dev, client->addr, type, -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) i2c_set_clientdata(client, mcp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static const struct i2c_device_id mcp230xx_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) { "mcp23008", MCP_TYPE_008 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) { "mcp23017", MCP_TYPE_017 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) { "mcp23018", MCP_TYPE_018 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) MODULE_DEVICE_TABLE(i2c, mcp230xx_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static const struct of_device_id mcp23s08_i2c_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) .compatible = "microchip,mcp23008",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .data = (void *) MCP_TYPE_008,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) .compatible = "microchip,mcp23017",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) .data = (void *) MCP_TYPE_017,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) .compatible = "microchip,mcp23018",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) .data = (void *) MCP_TYPE_018,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) /* NOTE: The use of the mcp prefix is deprecated and will be removed. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) .compatible = "mcp,mcp23008",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .data = (void *) MCP_TYPE_008,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .compatible = "mcp,mcp23017",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .data = (void *) MCP_TYPE_017,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) MODULE_DEVICE_TABLE(of, mcp23s08_i2c_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static struct i2c_driver mcp230xx_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) .name = "mcp230xx",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) .of_match_table = mcp23s08_i2c_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) .probe = mcp230xx_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) .id_table = mcp230xx_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static int __init mcp23s08_i2c_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return i2c_add_driver(&mcp230xx_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) * Register after I²C postcore initcall and before
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * subsys initcalls that may rely on these GPIOs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) subsys_initcall(mcp23s08_i2c_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) static void mcp23s08_i2c_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) i2c_del_driver(&mcp230xx_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) module_exit(mcp23s08_i2c_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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