dsa/b53/b53_spi.c

24 #include <linux/spi/spi.h>
42 static inline int b53_spi_read_reg(struct spi_device *spi, u8 reg, u8 *val,
50 	return spi_write_then_read(spi, txbuf, 2, val, len);
53 static inline int b53_spi_clear_status(struct spi_device *spi)
60 		ret = b53_spi_read_reg(spi, B53_SPI_STATUS, &rxbuf, 1);
76 static inline int b53_spi_set_page(struct spi_device *spi, u8 page)
84 	return spi_write(spi, txbuf, sizeof(txbuf));
87 static inline int b53_prepare_reg_access(struct spi_device *spi, u8 page)
89 	int ret = b53_spi_clear_status(spi);
94 	return b53_spi_set_page(spi, page);
97 static int b53_spi_prepare_reg_read(struct spi_device *spi, u8 reg)
103 	ret = b53_spi_read_reg(spi, reg, &rxbuf, 1);
108 		ret = b53_spi_read_reg(spi, B53_SPI_STATUS, &rxbuf, 1);
127 	struct spi_device *spi = dev->priv;
130 	ret = b53_prepare_reg_access(spi, page);
134 	ret = b53_spi_prepare_reg_read(spi, reg);
138 	return b53_spi_read_reg(spi, B53_SPI_DATA, data, len);
200 	struct spi_device *spi = dev->priv;
204 	ret = b53_prepare_reg_access(spi, page);
212 	return spi_write(spi, txbuf, sizeof(txbuf));
217 	struct spi_device *spi = dev->priv;
221 	ret = b53_prepare_reg_access(spi, page);
229 	return spi_write(spi, txbuf, sizeof(txbuf));
234 	struct spi_device *spi = dev->priv;
238 	ret = b53_prepare_reg_access(spi, page);
246 	return spi_write(spi, txbuf, sizeof(txbuf));
251 	struct spi_device *spi = dev->priv;
255 	ret = b53_prepare_reg_access(spi, page);
263 	return spi_write(spi, txbuf, sizeof(txbuf) - 2);
268 	struct spi_device *spi = dev->priv;
272 	ret = b53_prepare_reg_access(spi, page);
280 	return spi_write(spi, txbuf, sizeof(txbuf));
296 static int b53_spi_probe(struct spi_device *spi)
301 	dev = b53_switch_alloc(&spi->dev, &b53_spi_ops, spi);
305 	if (spi->dev.platform_data)
306 		dev->pdata = spi->dev.platform_data;
312 	spi_set_drvdata(spi, dev);
317 static void b53_spi_remove(struct spi_device *spi)
319 	struct b53_device *dev = spi_get_drvdata(spi);
325 static void b53_spi_shutdown(struct spi_device *spi)
327 	struct b53_device *dev = spi_get_drvdata(spi);
332 	spi_set_drvdata(spi, NULL);
359 MODULE_DEVICE_TABLE(spi, b53_spi_ids);