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v3.5.6
 
  1/*
  2 * Altera SPI driver
  3 *
  4 * Copyright (C) 2008 Thomas Chou <thomas@wytron.com.tw>
  5 *
  6 * Based on spi_s3c24xx.c, which is:
  7 * Copyright (c) 2006 Ben Dooks
  8 * Copyright (c) 2006 Simtec Electronics
  9 *	Ben Dooks <ben@simtec.co.uk>
 10 *
 11 * This program is free software; you can redistribute it and/or modify
 12 * it under the terms of the GNU General Public License version 2 as
 13 * published by the Free Software Foundation.
 14 */
 15
 16#include <linux/init.h>
 17#include <linux/interrupt.h>
 18#include <linux/errno.h>
 19#include <linux/module.h>
 20#include <linux/platform_device.h>
 
 21#include <linux/spi/spi.h>
 22#include <linux/spi/spi_bitbang.h>
 23#include <linux/io.h>
 24#include <linux/of.h>
 25
 26#define DRV_NAME "spi_altera"
 27
 28#define ALTERA_SPI_RXDATA	0
 29#define ALTERA_SPI_TXDATA	4
 30#define ALTERA_SPI_STATUS	8
 31#define ALTERA_SPI_CONTROL	12
 32#define ALTERA_SPI_SLAVE_SEL	20
 33
 34#define ALTERA_SPI_STATUS_ROE_MSK	0x8
 35#define ALTERA_SPI_STATUS_TOE_MSK	0x10
 36#define ALTERA_SPI_STATUS_TMT_MSK	0x20
 37#define ALTERA_SPI_STATUS_TRDY_MSK	0x40
 38#define ALTERA_SPI_STATUS_RRDY_MSK	0x80
 39#define ALTERA_SPI_STATUS_E_MSK		0x100
 40
 41#define ALTERA_SPI_CONTROL_IROE_MSK	0x8
 42#define ALTERA_SPI_CONTROL_ITOE_MSK	0x10
 43#define ALTERA_SPI_CONTROL_ITRDY_MSK	0x40
 44#define ALTERA_SPI_CONTROL_IRRDY_MSK	0x80
 45#define ALTERA_SPI_CONTROL_IE_MSK	0x100
 46#define ALTERA_SPI_CONTROL_SSO_MSK	0x400
 47
 48struct altera_spi {
 49	/* bitbang has to be first */
 50	struct spi_bitbang bitbang;
 51	struct completion done;
 
 
 52
 53	void __iomem *base;
 54	int irq;
 55	int len;
 56	int count;
 57	int bytes_per_word;
 58	unsigned long imr;
 59
 60	/* data buffers */
 61	const unsigned char *tx;
 62	unsigned char *rx;
 
 
 
 
 
 
 
 
 
 
 
 63};
 64
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 65static inline struct altera_spi *altera_spi_to_hw(struct spi_device *sdev)
 66{
 67	return spi_master_get_devdata(sdev->master);
 68}
 69
 70static void altera_spi_chipsel(struct spi_device *spi, int value)
 71{
 72	struct altera_spi *hw = altera_spi_to_hw(spi);
 73
 74	if (spi->mode & SPI_CS_HIGH) {
 75		switch (value) {
 76		case BITBANG_CS_INACTIVE:
 77			writel(1 << spi->chip_select,
 78			       hw->base + ALTERA_SPI_SLAVE_SEL);
 79			hw->imr |= ALTERA_SPI_CONTROL_SSO_MSK;
 80			writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
 81			break;
 
 
 
 
 
 
 
 82
 83		case BITBANG_CS_ACTIVE:
 84			hw->imr &= ~ALTERA_SPI_CONTROL_SSO_MSK;
 85			writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
 86			writel(0, hw->base + ALTERA_SPI_SLAVE_SEL);
 87			break;
 88		}
 89	} else {
 90		switch (value) {
 91		case BITBANG_CS_INACTIVE:
 92			hw->imr &= ~ALTERA_SPI_CONTROL_SSO_MSK;
 93			writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
 94			break;
 95
 96		case BITBANG_CS_ACTIVE:
 97			writel(1 << spi->chip_select,
 98			       hw->base + ALTERA_SPI_SLAVE_SEL);
 99			hw->imr |= ALTERA_SPI_CONTROL_SSO_MSK;
100			writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
101			break;
 
102		}
103	}
104}
105
106static int altera_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t)
107{
108	return 0;
109}
110
111static int altera_spi_setup(struct spi_device *spi)
112{
113	return 0;
114}
115
116static inline unsigned int hw_txbyte(struct altera_spi *hw, int count)
117{
118	if (hw->tx) {
119		switch (hw->bytes_per_word) {
120		case 1:
121			return hw->tx[count];
 
122		case 2:
123			return (hw->tx[count * 2]
124				| (hw->tx[count * 2 + 1] << 8));
 
 
 
 
 
 
 
 
125		}
126	}
127	return 0;
 
128}
129
130static int altera_spi_txrx(struct spi_device *spi, struct spi_transfer *t)
 
131{
132	struct altera_spi *hw = altera_spi_to_hw(spi);
 
133
134	hw->tx = t->tx_buf;
135	hw->rx = t->rx_buf;
136	hw->count = 0;
137	hw->bytes_per_word = (t->bits_per_word ? : spi->bits_per_word) / 8;
138	hw->len = t->len / hw->bytes_per_word;
139
140	if (hw->irq >= 0) {
141		/* enable receive interrupt */
142		hw->imr |= ALTERA_SPI_CONTROL_IRRDY_MSK;
143		writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
144
145		/* send the first byte */
146		writel(hw_txbyte(hw, 0), hw->base + ALTERA_SPI_TXDATA);
147
148		wait_for_completion(&hw->done);
149		/* disable receive interrupt */
150		hw->imr &= ~ALTERA_SPI_CONTROL_IRRDY_MSK;
151		writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
152	} else {
153		/* send the first byte */
154		writel(hw_txbyte(hw, 0), hw->base + ALTERA_SPI_TXDATA);
155
156		while (1) {
157			unsigned int rxd;
 
 
158
159			while (!(readl(hw->base + ALTERA_SPI_STATUS) &
160				 ALTERA_SPI_STATUS_RRDY_MSK))
161				cpu_relax();
162
163			rxd = readl(hw->base + ALTERA_SPI_RXDATA);
164			if (hw->rx) {
165				switch (hw->bytes_per_word) {
166				case 1:
167					hw->rx[hw->count] = rxd;
168					break;
169				case 2:
170					hw->rx[hw->count * 2] = rxd;
171					hw->rx[hw->count * 2 + 1] = rxd >> 8;
172					break;
173				}
174			}
175
176			hw->count++;
177
178			if (hw->count < hw->len)
179				writel(hw_txbyte(hw, hw->count),
180				       hw->base + ALTERA_SPI_TXDATA);
181			else
182				break;
183		}
184
185	}
186
187	return hw->count * hw->bytes_per_word;
188}
189
190static irqreturn_t altera_spi_irq(int irq, void *dev)
191{
192	struct altera_spi *hw = dev;
193	unsigned int rxd;
194
195	rxd = readl(hw->base + ALTERA_SPI_RXDATA);
196	if (hw->rx) {
197		switch (hw->bytes_per_word) {
198		case 1:
199			hw->rx[hw->count] = rxd;
200			break;
201		case 2:
202			hw->rx[hw->count * 2] = rxd;
203			hw->rx[hw->count * 2 + 1] = rxd >> 8;
204			break;
205		}
206	}
207
208	hw->count++;
 
 
 
 
 
209
210	if (hw->count < hw->len)
211		writel(hw_txbyte(hw, hw->count), hw->base + ALTERA_SPI_TXDATA);
212	else
213		complete(&hw->done);
214
215	return IRQ_HANDLED;
216}
217
218static int __devinit altera_spi_probe(struct platform_device *pdev)
219{
220	struct altera_spi_platform_data *platp = pdev->dev.platform_data;
 
 
221	struct altera_spi *hw;
222	struct spi_master *master;
223	struct resource *res;
224	int err = -ENODEV;
 
 
225
226	master = spi_alloc_master(&pdev->dev, sizeof(struct altera_spi));
227	if (!master)
228		return err;
229
230	/* setup the master state. */
231	master->bus_num = pdev->id;
232	master->num_chipselect = 16;
233	master->mode_bits = SPI_CS_HIGH;
234	master->setup = altera_spi_setup;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
235
236	hw = spi_master_get_devdata(master);
237	platform_set_drvdata(pdev, hw);
238
239	/* setup the state for the bitbang driver */
240	hw->bitbang.master = spi_master_get(master);
241	if (!hw->bitbang.master)
242		return err;
243	hw->bitbang.setup_transfer = altera_spi_setupxfer;
244	hw->bitbang.chipselect = altera_spi_chipsel;
245	hw->bitbang.txrx_bufs = altera_spi_txrx;
246
247	/* find and map our resources */
248	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
249	if (!res)
250		goto exit_busy;
251	if (!devm_request_mem_region(&pdev->dev, res->start, resource_size(res),
252				     pdev->name))
253		goto exit_busy;
254	hw->base = devm_ioremap_nocache(&pdev->dev, res->start,
255					resource_size(res));
256	if (!hw->base)
257		goto exit_busy;
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
258	/* program defaults into the registers */
259	hw->imr = 0;		/* disable spi interrupts */
260	writel(hw->imr, hw->base + ALTERA_SPI_CONTROL);
261	writel(0, hw->base + ALTERA_SPI_STATUS);	/* clear status reg */
262	if (readl(hw->base + ALTERA_SPI_STATUS) & ALTERA_SPI_STATUS_RRDY_MSK)
263		readl(hw->base + ALTERA_SPI_RXDATA);	/* flush rxdata */
 
264	/* irq is optional */
265	hw->irq = platform_get_irq(pdev, 0);
266	if (hw->irq >= 0) {
267		init_completion(&hw->done);
268		err = devm_request_irq(&pdev->dev, hw->irq, altera_spi_irq, 0,
269				       pdev->name, hw);
270		if (err)
271			goto exit;
272	}
273	/* find platform data */
274	if (!platp)
275		hw->bitbang.master->dev.of_node = pdev->dev.of_node;
276
277	/* register our spi controller */
278	err = spi_bitbang_start(&hw->bitbang);
279	if (err)
280		goto exit;
281	dev_info(&pdev->dev, "base %p, irq %d\n", hw->base, hw->irq);
282
283	return 0;
 
 
 
 
 
 
 
284
285exit_busy:
286	err = -EBUSY;
 
287exit:
288	platform_set_drvdata(pdev, NULL);
289	spi_master_put(master);
290	return err;
291}
292
293static int __devexit altera_spi_remove(struct platform_device *dev)
294{
295	struct altera_spi *hw = platform_get_drvdata(dev);
296	struct spi_master *master = hw->bitbang.master;
297
298	spi_bitbang_stop(&hw->bitbang);
299	platform_set_drvdata(dev, NULL);
300	spi_master_put(master);
301	return 0;
302}
303
304#ifdef CONFIG_OF
305static const struct of_device_id altera_spi_match[] = {
306	{ .compatible = "ALTR,spi-1.0", },
 
307	{},
308};
309MODULE_DEVICE_TABLE(of, altera_spi_match);
310#else /* CONFIG_OF */
311#define altera_spi_match NULL
312#endif /* CONFIG_OF */
313
 
 
 
 
 
 
 
314static struct platform_driver altera_spi_driver = {
315	.probe = altera_spi_probe,
316	.remove = __devexit_p(altera_spi_remove),
317	.driver = {
318		.name = DRV_NAME,
319		.owner = THIS_MODULE,
320		.pm = NULL,
321		.of_match_table = altera_spi_match,
322	},
 
323};
324module_platform_driver(altera_spi_driver);
325
326MODULE_DESCRIPTION("Altera SPI driver");
327MODULE_AUTHOR("Thomas Chou <thomas@wytron.com.tw>");
328MODULE_LICENSE("GPL");
329MODULE_ALIAS("platform:" DRV_NAME);
v5.9
  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * Altera SPI driver
  4 *
  5 * Copyright (C) 2008 Thomas Chou <thomas@wytron.com.tw>
  6 *
  7 * Based on spi_s3c24xx.c, which is:
  8 * Copyright (c) 2006 Ben Dooks
  9 * Copyright (c) 2006 Simtec Electronics
 10 *	Ben Dooks <ben@simtec.co.uk>
 
 
 
 
 11 */
 12
 
 13#include <linux/interrupt.h>
 14#include <linux/errno.h>
 15#include <linux/module.h>
 16#include <linux/platform_device.h>
 17#include <linux/spi/altera.h>
 18#include <linux/spi/spi.h>
 
 19#include <linux/io.h>
 20#include <linux/of.h>
 21
 22#define DRV_NAME "spi_altera"
 23
 24#define ALTERA_SPI_RXDATA	0
 25#define ALTERA_SPI_TXDATA	4
 26#define ALTERA_SPI_STATUS	8
 27#define ALTERA_SPI_CONTROL	12
 28#define ALTERA_SPI_SLAVE_SEL	20
 29
 30#define ALTERA_SPI_STATUS_ROE_MSK	0x8
 31#define ALTERA_SPI_STATUS_TOE_MSK	0x10
 32#define ALTERA_SPI_STATUS_TMT_MSK	0x20
 33#define ALTERA_SPI_STATUS_TRDY_MSK	0x40
 34#define ALTERA_SPI_STATUS_RRDY_MSK	0x80
 35#define ALTERA_SPI_STATUS_E_MSK		0x100
 36
 37#define ALTERA_SPI_CONTROL_IROE_MSK	0x8
 38#define ALTERA_SPI_CONTROL_ITOE_MSK	0x10
 39#define ALTERA_SPI_CONTROL_ITRDY_MSK	0x40
 40#define ALTERA_SPI_CONTROL_IRRDY_MSK	0x80
 41#define ALTERA_SPI_CONTROL_IE_MSK	0x100
 42#define ALTERA_SPI_CONTROL_SSO_MSK	0x400
 43
 44#define ALTERA_SPI_MAX_CS		32
 45
 46enum altera_spi_type {
 47	ALTERA_SPI_TYPE_UNKNOWN,
 48	ALTERA_SPI_TYPE_SUBDEV,
 49};
 50
 51struct altera_spi {
 52	int irq;
 53	int len;
 54	int count;
 55	int bytes_per_word;
 56	u32 imr;
 57
 58	/* data buffers */
 59	const unsigned char *tx;
 60	unsigned char *rx;
 61
 62	struct regmap *regmap;
 63	u32 regoff;
 64	struct device *dev;
 65};
 66
 67static const struct regmap_config spi_altera_config = {
 68	.reg_bits = 32,
 69	.reg_stride = 4,
 70	.val_bits = 32,
 71	.fast_io = true,
 72};
 73
 74static int altr_spi_writel(struct altera_spi *hw, unsigned int reg,
 75			   unsigned int val)
 76{
 77	int ret;
 78
 79	ret = regmap_write(hw->regmap, hw->regoff + reg, val);
 80	if (ret)
 81		dev_err(hw->dev, "fail to write reg 0x%x val 0x%x: %d\n",
 82			reg, val, ret);
 83
 84	return ret;
 85}
 86
 87static int altr_spi_readl(struct altera_spi *hw, unsigned int reg,
 88			  unsigned int *val)
 89{
 90	int ret;
 91
 92	ret = regmap_read(hw->regmap, hw->regoff + reg, val);
 93	if (ret)
 94		dev_err(hw->dev, "fail to read reg 0x%x: %d\n", reg, ret);
 95
 96	return ret;
 97}
 98
 99static inline struct altera_spi *altera_spi_to_hw(struct spi_device *sdev)
100{
101	return spi_master_get_devdata(sdev->master);
102}
103
104static void altera_spi_set_cs(struct spi_device *spi, bool is_high)
105{
106	struct altera_spi *hw = altera_spi_to_hw(spi);
107
108	if (is_high) {
109		hw->imr &= ~ALTERA_SPI_CONTROL_SSO_MSK;
110		altr_spi_writel(hw, ALTERA_SPI_CONTROL, hw->imr);
111		altr_spi_writel(hw, ALTERA_SPI_SLAVE_SEL, 0);
112	} else {
113		altr_spi_writel(hw, ALTERA_SPI_SLAVE_SEL,
114				BIT(spi->chip_select));
115		hw->imr |= ALTERA_SPI_CONTROL_SSO_MSK;
116		altr_spi_writel(hw, ALTERA_SPI_CONTROL, hw->imr);
117	}
118}
119
120static void altera_spi_tx_word(struct altera_spi *hw)
121{
122	unsigned int txd = 0;
123
124	if (hw->tx) {
125		switch (hw->bytes_per_word) {
126		case 1:
127			txd = hw->tx[hw->count];
128			break;
129		case 2:
130			txd = (hw->tx[hw->count * 2]
131				| (hw->tx[hw->count * 2 + 1] << 8));
 
 
 
132			break;
133		case 4:
134			txd = (hw->tx[hw->count * 4]
135				| (hw->tx[hw->count * 4 + 1] << 8)
136				| (hw->tx[hw->count * 4 + 2] << 16)
137				| (hw->tx[hw->count * 4 + 3] << 24));
 
138			break;
139
140		}
141	}
 
142
143	altr_spi_writel(hw, ALTERA_SPI_TXDATA, txd);
 
 
144}
145
146static void altera_spi_rx_word(struct altera_spi *hw)
147{
148	unsigned int rxd;
 
149
150	altr_spi_readl(hw, ALTERA_SPI_RXDATA, &rxd);
151	if (hw->rx) {
 
152		switch (hw->bytes_per_word) {
153		case 1:
154			hw->rx[hw->count] = rxd;
155			break;
156		case 2:
157			hw->rx[hw->count * 2] = rxd;
158			hw->rx[hw->count * 2 + 1] = rxd >> 8;
159			break;
160		case 4:
161			hw->rx[hw->count * 4] = rxd;
162			hw->rx[hw->count * 4 + 1] = rxd >> 8;
163			hw->rx[hw->count * 4 + 2] = rxd >> 16;
164			hw->rx[hw->count * 4 + 3] = rxd >> 24;
165			break;
166
167		}
168	}
169
170	hw->count++;
171}
172
173static int altera_spi_txrx(struct spi_master *master,
174	struct spi_device *spi, struct spi_transfer *t)
175{
176	struct altera_spi *hw = spi_master_get_devdata(master);
177	u32 val;
178
179	hw->tx = t->tx_buf;
180	hw->rx = t->rx_buf;
181	hw->count = 0;
182	hw->bytes_per_word = DIV_ROUND_UP(t->bits_per_word, 8);
183	hw->len = t->len / hw->bytes_per_word;
184
185	if (hw->irq >= 0) {
186		/* enable receive interrupt */
187		hw->imr |= ALTERA_SPI_CONTROL_IRRDY_MSK;
188		altr_spi_writel(hw, ALTERA_SPI_CONTROL, hw->imr);
189
190		/* send the first byte */
191		altera_spi_tx_word(hw);
 
 
 
 
 
192	} else {
193		while (hw->count < hw->len) {
194			altera_spi_tx_word(hw);
195
196			for (;;) {
197				altr_spi_readl(hw, ALTERA_SPI_STATUS, &val);
198				if (val & ALTERA_SPI_STATUS_RRDY_MSK)
199					break;
200
 
 
201				cpu_relax();
 
 
 
 
 
 
 
 
 
 
 
 
202			}
203
204			altera_spi_rx_word(hw);
 
 
 
 
 
 
205		}
206		spi_finalize_current_transfer(master);
207	}
208
209	return t->len;
210}
211
212static irqreturn_t altera_spi_irq(int irq, void *dev)
213{
214	struct spi_master *master = dev;
215	struct altera_spi *hw = spi_master_get_devdata(master);
216
217	altera_spi_rx_word(hw);
 
 
 
 
 
 
 
 
 
 
 
218
219	if (hw->count < hw->len) {
220		altera_spi_tx_word(hw);
221	} else {
222		/* disable receive interrupt */
223		hw->imr &= ~ALTERA_SPI_CONTROL_IRRDY_MSK;
224		altr_spi_writel(hw, ALTERA_SPI_CONTROL, hw->imr);
225
226		spi_finalize_current_transfer(master);
227	}
 
 
228
229	return IRQ_HANDLED;
230}
231
232static int altera_spi_probe(struct platform_device *pdev)
233{
234	const struct platform_device_id *platid = platform_get_device_id(pdev);
235	struct altera_spi_platform_data *pdata = dev_get_platdata(&pdev->dev);
236	enum altera_spi_type type = ALTERA_SPI_TYPE_UNKNOWN;
237	struct altera_spi *hw;
238	struct spi_master *master;
 
239	int err = -ENODEV;
240	u32 val;
241	u16 i;
242
243	master = spi_alloc_master(&pdev->dev, sizeof(struct altera_spi));
244	if (!master)
245		return err;
246
247	/* setup the master state. */
248	master->bus_num = pdev->id;
249
250	if (pdata) {
251		if (pdata->num_chipselect > ALTERA_SPI_MAX_CS) {
252			dev_err(&pdev->dev,
253				"Invalid number of chipselect: %hu\n",
254				pdata->num_chipselect);
255			return -EINVAL;
256		}
257
258		master->num_chipselect = pdata->num_chipselect;
259		master->mode_bits = pdata->mode_bits;
260		master->bits_per_word_mask = pdata->bits_per_word_mask;
261	} else {
262		master->num_chipselect = 16;
263		master->mode_bits = SPI_CS_HIGH;
264		master->bits_per_word_mask = SPI_BPW_RANGE_MASK(1, 16);
265	}
266
267	master->dev.of_node = pdev->dev.of_node;
268	master->transfer_one = altera_spi_txrx;
269	master->set_cs = altera_spi_set_cs;
270
271	hw = spi_master_get_devdata(master);
272	hw->dev = &pdev->dev;
273
274	if (platid)
275		type = platid->driver_data;
 
 
 
 
 
276
277	/* find and map our resources */
278	if (type == ALTERA_SPI_TYPE_SUBDEV) {
279		struct resource *regoff;
280
281		hw->regmap = dev_get_regmap(pdev->dev.parent, NULL);
282		if (!hw->regmap) {
283			dev_err(&pdev->dev, "get regmap failed\n");
284			goto exit;
285		}
286
287		regoff = platform_get_resource(pdev, IORESOURCE_REG, 0);
288		if (regoff)
289			hw->regoff = regoff->start;
290	} else {
291		void __iomem *res;
292
293		res = devm_platform_ioremap_resource(pdev, 0);
294		if (IS_ERR(res)) {
295			err = PTR_ERR(res);
296			goto exit;
297		}
298
299		hw->regmap = devm_regmap_init_mmio(&pdev->dev, res,
300						   &spi_altera_config);
301		if (IS_ERR(hw->regmap)) {
302			dev_err(&pdev->dev, "regmap mmio init failed\n");
303			err = PTR_ERR(hw->regmap);
304			goto exit;
305		}
306	}
307
308	/* program defaults into the registers */
309	hw->imr = 0;		/* disable spi interrupts */
310	altr_spi_writel(hw, ALTERA_SPI_CONTROL, hw->imr);
311	altr_spi_writel(hw, ALTERA_SPI_STATUS, 0);	/* clear status reg */
312	altr_spi_readl(hw, ALTERA_SPI_STATUS, &val);
313	if (val & ALTERA_SPI_STATUS_RRDY_MSK)
314		altr_spi_readl(hw, ALTERA_SPI_RXDATA, &val); /* flush rxdata */
315	/* irq is optional */
316	hw->irq = platform_get_irq(pdev, 0);
317	if (hw->irq >= 0) {
 
318		err = devm_request_irq(&pdev->dev, hw->irq, altera_spi_irq, 0,
319				       pdev->name, master);
320		if (err)
321			goto exit;
322	}
 
 
 
323
324	err = devm_spi_register_master(&pdev->dev, master);
 
325	if (err)
326		goto exit;
 
327
328	if (pdata) {
329		for (i = 0; i < pdata->num_devices; i++) {
330			if (!spi_new_device(master, pdata->devices + i))
331				dev_warn(&pdev->dev,
332					 "unable to create SPI device: %s\n",
333					 pdata->devices[i].modalias);
334		}
335	}
336
337	dev_info(&pdev->dev, "regoff %u, irq %d\n", hw->regoff, hw->irq);
338
339	return 0;
340exit:
 
341	spi_master_put(master);
342	return err;
343}
344
 
 
 
 
 
 
 
 
 
 
 
345#ifdef CONFIG_OF
346static const struct of_device_id altera_spi_match[] = {
347	{ .compatible = "ALTR,spi-1.0", },
348	{ .compatible = "altr,spi-1.0", },
349	{},
350};
351MODULE_DEVICE_TABLE(of, altera_spi_match);
 
 
352#endif /* CONFIG_OF */
353
354static const struct platform_device_id altera_spi_ids[] = {
355	{ DRV_NAME,		ALTERA_SPI_TYPE_UNKNOWN },
356	{ "subdev_spi_altera",	ALTERA_SPI_TYPE_SUBDEV },
357	{ }
358};
359MODULE_DEVICE_TABLE(platform, altera_spi_ids);
360
361static struct platform_driver altera_spi_driver = {
362	.probe = altera_spi_probe,
 
363	.driver = {
364		.name = DRV_NAME,
 
365		.pm = NULL,
366		.of_match_table = of_match_ptr(altera_spi_match),
367	},
368	.id_table	= altera_spi_ids,
369};
370module_platform_driver(altera_spi_driver);
371
372MODULE_DESCRIPTION("Altera SPI driver");
373MODULE_AUTHOR("Thomas Chou <thomas@wytron.com.tw>");
374MODULE_LICENSE("GPL");
375MODULE_ALIAS("platform:" DRV_NAME);