i2c/busses/i2c-pca-platform.c

17 #include <linux/i2c.h>
20 #include <linux/i2c-algo-pca.h>
21 #include <linux/platform_data/i2c-pca-platform.h>
41 	struct i2c_pca_pf_data *i2c = pd;
42 	return ioread8(i2c->reg_base + reg);
47 	struct i2c_pca_pf_data *i2c = pd;
48 	return ioread8(i2c->reg_base + reg * 2);
53 	struct i2c_pca_pf_data *i2c = pd;
54 	return ioread8(i2c->reg_base + reg * 4);
59 	struct i2c_pca_pf_data *i2c = pd;
60 	iowrite8(val, i2c->reg_base + reg);
65 	struct i2c_pca_pf_data *i2c = pd;
66 	iowrite8(val, i2c->reg_base + reg * 2);
71 	struct i2c_pca_pf_data *i2c = pd;
72 	iowrite8(val, i2c->reg_base + reg * 4);
78 	struct i2c_pca_pf_data *i2c = pd;
82 	if (i2c->irq) {
83 		ret = wait_event_timeout(i2c->wait,
84 			i2c->algo_data.read_byte(i2c, I2C_PCA_CON)
85 			& I2C_PCA_CON_SI, i2c->adap.timeout);
88 		timeout = jiffies + i2c->adap.timeout;
91 			if (i2c->algo_data.read_byte(i2c, I2C_PCA_CON)
103 	struct i2c_pca_pf_data *i2c = pd;
105 	dev_warn(&i2c->adap.dev, "No reset-pin found. Chip may get stuck!\n");
110 	struct i2c_pca_pf_data *i2c = pd;
112 	gpiod_set_value(i2c->gpio, 1);
114 	gpiod_set_value(i2c->gpio, 0);
119 	struct i2c_pca_pf_data *i2c = dev_id;
121 	if ((i2c->algo_data.read_byte(i2c, I2C_PCA_CON) & I2C_PCA_CON_SI) == 0)
124 	wake_up(&i2c->wait);
132 	struct i2c_pca_pf_data *i2c;
145 	i2c = devm_kzalloc(&pdev->dev, sizeof(*i2c), GFP_KERNEL);
146 	if (!i2c)
149 	i2c->reg_base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
150 	if (IS_ERR(i2c->reg_base))
151 		return PTR_ERR(i2c->reg_base);
154 	init_waitqueue_head(&i2c->wait);
156 	i2c->irq = irq;
158 	i2c->adap.nr = pdev->id;
159 	i2c->adap.owner = THIS_MODULE;
160 	snprintf(i2c->adap.name, sizeof(i2c->adap.name),
163 	i2c->adap.algo_data = &i2c->algo_data;
164 	i2c->adap.dev.parent = &pdev->dev;
165 	i2c->adap.dev.of_node = np;
167 	i2c->gpio = devm_gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
168 	if (IS_ERR(i2c->gpio))
169 		return PTR_ERR(i2c->gpio);
171 	i2c->adap.timeout = HZ;
173 				       &i2c->algo_data.i2c_clock);
175 		i2c->algo_data.i2c_clock = 59000;
178 		i2c->adap.timeout = platform_data->timeout;
179 		i2c->algo_data.i2c_clock = platform_data->i2c_clock_speed;
182 	i2c->algo_data.data = i2c;
183 	i2c->algo_data.wait_for_completion = i2c_pca_pf_waitforcompletion;
184 	if (i2c->gpio)
185 		i2c->algo_data.reset_chip = i2c_pca_pf_resetchip;
187 		i2c->algo_data.reset_chip = i2c_pca_pf_dummyreset;
191 		i2c->algo_data.write_byte = i2c_pca_pf_writebyte32;
192 		i2c->algo_data.read_byte = i2c_pca_pf_readbyte32;
195 		i2c->algo_data.write_byte = i2c_pca_pf_writebyte16;
196 		i2c->algo_data.read_byte = i2c_pca_pf_readbyte16;
200 		i2c->algo_data.write_byte = i2c_pca_pf_writebyte8;
201 		i2c->algo_data.read_byte = i2c_pca_pf_readbyte8;
207 			IRQF_TRIGGER_FALLING, pdev->name, i2c);
212 	ret = i2c_pca_add_numbered_bus(&i2c->adap);
216 	platform_set_drvdata(pdev, i2c);
225 	struct i2c_pca_pf_data *i2c = platform_get_drvdata(pdev);
227 	i2c_del_adapter(&i2c->adap);
243 		.name = "i2c-pca-platform",