^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) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * I2C multiplexer using GPIO API
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Peter Korsgaard <peter.korsgaard@barco.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/i2c-mux.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/platform_data/i2c-mux-gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/bits.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/gpio/consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) /* FIXME: stop poking around inside gpiolib */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "../../gpio/gpiolib.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct gpiomux {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct i2c_mux_gpio_platform_data data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) int ngpios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct gpio_desc **gpios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static void i2c_mux_gpio_set(const struct gpiomux *mux, unsigned val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) DECLARE_BITMAP(values, BITS_PER_TYPE(val));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) values[0] = val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) gpiod_set_array_value_cansleep(mux->ngpios, mux->gpios, NULL, values);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static int i2c_mux_gpio_select(struct i2c_mux_core *muxc, u32 chan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct gpiomux *mux = i2c_mux_priv(muxc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) i2c_mux_gpio_set(mux, chan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static int i2c_mux_gpio_deselect(struct i2c_mux_core *muxc, u32 chan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) struct gpiomux *mux = i2c_mux_priv(muxc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) i2c_mux_gpio_set(mux, mux->data.idle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static int i2c_mux_gpio_probe_dt(struct gpiomux *mux,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct device_node *np = pdev->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct device_node *adapter_np, *child;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) struct i2c_adapter *adapter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) unsigned *values;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) int i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) if (!np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) adapter_np = of_parse_phandle(np, "i2c-parent", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) if (!adapter_np) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) dev_err(&pdev->dev, "Cannot parse i2c-parent\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) adapter = of_find_i2c_adapter_by_node(adapter_np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) of_node_put(adapter_np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (!adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return -EPROBE_DEFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) mux->data.parent = i2c_adapter_id(adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) put_device(&adapter->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) mux->data.n_values = of_get_child_count(np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) values = devm_kcalloc(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) mux->data.n_values, sizeof(*mux->data.values),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (!values) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) dev_err(&pdev->dev, "Cannot allocate values array");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) for_each_child_of_node(np, child) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) of_property_read_u32(child, "reg", values + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) i++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) mux->data.values = values;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (of_property_read_u32(np, "idle-state", &mux->data.idle))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) mux->data.idle = I2C_MUX_GPIO_NO_IDLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static int i2c_mux_gpio_probe_dt(struct gpiomux *mux,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static int i2c_mux_gpio_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) struct i2c_mux_core *muxc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) struct gpiomux *mux;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) struct i2c_adapter *parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) struct i2c_adapter *root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) unsigned initial_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) int i, ngpios, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) mux = devm_kzalloc(&pdev->dev, sizeof(*mux), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) if (!mux)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (!dev_get_platdata(&pdev->dev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) ret = i2c_mux_gpio_probe_dt(mux, pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) memcpy(&mux->data, dev_get_platdata(&pdev->dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) sizeof(mux->data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) ngpios = gpiod_count(&pdev->dev, "mux");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (ngpios <= 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) dev_err(&pdev->dev, "no valid gpios provided\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return ngpios ?: -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) mux->ngpios = ngpios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) parent = i2c_get_adapter(mux->data.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (!parent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return -EPROBE_DEFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) muxc = i2c_mux_alloc(parent, &pdev->dev, mux->data.n_values,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) ngpios * sizeof(*mux->gpios), 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) i2c_mux_gpio_select, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (!muxc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) goto alloc_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) mux->gpios = muxc->priv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) muxc->priv = mux;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) platform_set_drvdata(pdev, muxc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) root = i2c_root_adapter(&parent->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) muxc->mux_locked = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (mux->data.idle != I2C_MUX_GPIO_NO_IDLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) initial_state = mux->data.idle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) muxc->deselect = i2c_mux_gpio_deselect;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) initial_state = mux->data.values[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) for (i = 0; i < ngpios; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) struct device *gpio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) struct gpio_desc *gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) enum gpiod_flags flag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) if (initial_state & BIT(i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) flag = GPIOD_OUT_HIGH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) flag = GPIOD_OUT_LOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) gpiod = devm_gpiod_get_index(&pdev->dev, "mux", i, flag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (IS_ERR(gpiod)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) ret = PTR_ERR(gpiod);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) goto alloc_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) mux->gpios[i] = gpiod;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (!muxc->mux_locked)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) /* FIXME: find a proper way to access the GPIO device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) gpio_dev = &gpiod->gdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) muxc->mux_locked = i2c_root_adapter(gpio_dev) == root;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (muxc->mux_locked)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) dev_info(&pdev->dev, "mux-locked i2c mux\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) for (i = 0; i < mux->data.n_values; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) u32 nr = mux->data.base_nr ? (mux->data.base_nr + i) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) unsigned int class = mux->data.classes ? mux->data.classes[i] : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) ret = i2c_mux_add_adapter(muxc, nr, mux->data.values[i], class);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) goto add_adapter_failed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) dev_info(&pdev->dev, "%d port mux on %s adapter\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) mux->data.n_values, parent->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) add_adapter_failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) i2c_mux_del_adapters(muxc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) alloc_failed:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) i2c_put_adapter(parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) static int i2c_mux_gpio_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) struct i2c_mux_core *muxc = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) i2c_mux_del_adapters(muxc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) i2c_put_adapter(muxc->parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) static const struct of_device_id i2c_mux_gpio_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) { .compatible = "i2c-mux-gpio", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) MODULE_DEVICE_TABLE(of, i2c_mux_gpio_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) static struct platform_driver i2c_mux_gpio_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) .probe = i2c_mux_gpio_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) .remove = i2c_mux_gpio_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) .name = "i2c-mux-gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) .of_match_table = i2c_mux_gpio_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) module_platform_driver(i2c_mux_gpio_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) MODULE_DESCRIPTION("GPIO-based I2C multiplexer driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) MODULE_AUTHOR("Peter Korsgaard <peter.korsgaard@barco.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) MODULE_ALIAS("platform:i2c-mux-gpio");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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