2  * MC33880 high-side/low-side switch GPIO driver
20  * Freescale MC33880 high-side/low-side switch
25 #include <linux/spi/spi.h>
26 #include <linux/spi/mc33880.h>
27 #include <linux/gpio.h>
52 	struct spi_device *spi;  member
57 	return spi_write(mc->spi, &mc->port_config, sizeof(mc->port_config));  in mc33880_write_config()
64 		mc->port_config |= 1 << offset;  in __mc33880_set()
66 		mc->port_config &= ~(1 << offset);  in __mc33880_set()
76 	mutex_lock(&mc->lock);  in mc33880_set()
80 	mutex_unlock(&mc->lock);  in mc33880_set()
83 static int __devinit mc33880_probe(struct spi_device *spi)  in mc33880_probe()  argument
89 	pdata = spi->dev.platform_data;  in mc33880_probe()
90 	if (!pdata || !pdata->base) {  in mc33880_probe()
91 		dev_dbg(&spi->dev, "incorrect or missing platform data\n");  in mc33880_probe()
92 		return -EINVAL;  in mc33880_probe()
98 	spi->bits_per_word = 8;  in mc33880_probe()
100 	ret = spi_setup(spi);  in mc33880_probe()
106 		return -ENOMEM;  in mc33880_probe()
108 	mutex_init(&mc->lock);  in mc33880_probe()
110 	dev_set_drvdata(&spi->dev, mc);  in mc33880_probe()
112 	mc->spi = spi;  in mc33880_probe()
114 	mc->chip.label = DRIVER_NAME,  in mc33880_probe()
115 	mc->chip.set = mc33880_set;  in mc33880_probe()
116 	mc->chip.base = pdata->base;  in mc33880_probe()
117 	mc->chip.ngpio = PIN_NUMBER;  in mc33880_probe()
118 	mc->chip.can_sleep = 1;  in mc33880_probe()
119 	mc->chip.dev = &spi->dev;  in mc33880_probe()
120 	mc->chip.owner = THIS_MODULE;  in mc33880_probe()
122 	mc->port_config = 0x00;  in mc33880_probe()
124 	 * is just for testing SPI communication, and the second is the  in mc33880_probe()
128 	mc->port_config = 0x00;  in mc33880_probe()
137 	ret = gpiochip_add(&mc->chip);  in mc33880_probe()
144 	dev_set_drvdata(&spi->dev, NULL);  in mc33880_probe()
145 	mutex_destroy(&mc->lock);  in mc33880_probe()
150 static int __devexit mc33880_remove(struct spi_device *spi)  in mc33880_remove()  argument
155 	mc = dev_get_drvdata(&spi->dev);  in mc33880_remove()
157 		return -ENODEV;  in mc33880_remove()
159 	dev_set_drvdata(&spi->dev, NULL);  in mc33880_remove()
161 	ret = gpiochip_remove(&mc->chip);  in mc33880_remove()
163 		mutex_destroy(&mc->lock);  in mc33880_remove()
166 		dev_err(&spi->dev, "Failed to remove the GPIO controller: %d\n",  in mc33880_remove()
185 /* register after spi postcore initcall and before
196 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");