9 #include <linux/i2c-mux.h>
11 #include <linux/platform_data/i2c-mux-gpio.h>
25 static void i2c_mux_gpio_set(const struct gpiomux *mux, unsigned int val)  in i2c_mux_gpio_set()  argument
31 	gpiod_set_array_value_cansleep(mux->ngpios, mux->gpios, NULL, values);  in i2c_mux_gpio_set()
36 	struct gpiomux *mux = i2c_mux_priv(muxc);  in i2c_mux_gpio_select()  local
38 	i2c_mux_gpio_set(mux, chan);  in i2c_mux_gpio_select()
45 	struct gpiomux *mux = i2c_mux_priv(muxc);  in i2c_mux_gpio_deselect()  local
47 	i2c_mux_gpio_set(mux, mux->data.idle);  in i2c_mux_gpio_deselect()
52 static int i2c_mux_gpio_probe_fw(struct gpiomux *mux,  in i2c_mux_gpio_probe_fw()  argument
78 		 * In ACPI land the mux should be a direct child of the i2c  in i2c_mux_gpio_probe_fw()
89 	mux->data.parent = i2c_adapter_id(adapter);  in i2c_mux_gpio_probe_fw()
92 	mux->data.n_values = device_get_child_node_count(dev);  in i2c_mux_gpio_probe_fw()
94 			      mux->data.n_values, sizeof(*mux->data.values),  in i2c_mux_gpio_probe_fw()
114 	mux->data.values = values;  in i2c_mux_gpio_probe_fw()
116 	if (device_property_read_u32(dev, "idle-state", &mux->data.idle))  in i2c_mux_gpio_probe_fw()
117 		mux->data.idle = I2C_MUX_GPIO_NO_IDLE;  in i2c_mux_gpio_probe_fw()
125 	struct gpiomux *mux;  in i2c_mux_gpio_probe()  local
131 	mux = devm_kzalloc(&pdev->dev, sizeof(*mux), GFP_KERNEL);  in i2c_mux_gpio_probe()
132 	if (!mux)  in i2c_mux_gpio_probe()
136 		ret = i2c_mux_gpio_probe_fw(mux, pdev);  in i2c_mux_gpio_probe()
140 		memcpy(&mux->data, dev_get_platdata(&pdev->dev),  in i2c_mux_gpio_probe()
141 			sizeof(mux->data));  in i2c_mux_gpio_probe()
144 	ngpios = gpiod_count(&pdev->dev, "mux");  in i2c_mux_gpio_probe()
149 	mux->ngpios = ngpios;  in i2c_mux_gpio_probe()
151 	parent = i2c_get_adapter(mux->data.parent);  in i2c_mux_gpio_probe()
155 	muxc = i2c_mux_alloc(parent, &pdev->dev, mux->data.n_values,  in i2c_mux_gpio_probe()
156 			     array_size(ngpios, sizeof(*mux->gpios)), 0,  in i2c_mux_gpio_probe()
162 	mux->gpios = muxc->priv;  in i2c_mux_gpio_probe()
163 	muxc->priv = mux;  in i2c_mux_gpio_probe()
171 	if (mux->data.idle != I2C_MUX_GPIO_NO_IDLE) {  in i2c_mux_gpio_probe()
172 		initial_state = mux->data.idle;  in i2c_mux_gpio_probe()
175 		initial_state = mux->data.values[0];  in i2c_mux_gpio_probe()
188 		gpiod = devm_gpiod_get_index(&pdev->dev, "mux", i, flag);  in i2c_mux_gpio_probe()
194 		mux->gpios[i] = gpiod;  in i2c_mux_gpio_probe()
205 		dev_info(&pdev->dev, "mux-locked i2c mux\n");  in i2c_mux_gpio_probe()
207 	for (i = 0; i < mux->data.n_values; i++) {  in i2c_mux_gpio_probe()
208 		u32 nr = mux->data.base_nr ? (mux->data.base_nr + i) : 0;  in i2c_mux_gpio_probe()
209 		unsigned int class = mux->data.classes ? mux->data.classes[i] : 0;  in i2c_mux_gpio_probe()
211 		ret = i2c_mux_add_adapter(muxc, nr, mux->data.values[i], class);  in i2c_mux_gpio_probe()
216 	dev_info(&pdev->dev, "%d port mux on %s adapter\n",  in i2c_mux_gpio_probe()
217 		 mux->data.n_values, parent->name);  in i2c_mux_gpio_probe()
238 	{ .compatible = "i2c-mux-gpio", },
247 		.name	= "i2c-mux-gpio",
257 MODULE_ALIAS("platform:i2c-mux-gpio");