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6126fd83 FE |
1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | // | |
3 | // Freescale i.MX7ULP LPSPI driver | |
4 | // | |
5 | // Copyright 2016 Freescale Semiconductor, Inc. | |
07d71557 | 6 | // Copyright 2018 NXP Semiconductors |
5314987d GP |
7 | |
8 | #include <linux/clk.h> | |
9 | #include <linux/completion.h> | |
10 | #include <linux/delay.h> | |
09c04466 CW |
11 | #include <linux/dmaengine.h> |
12 | #include <linux/dma-mapping.h> | |
5314987d GP |
13 | #include <linux/err.h> |
14 | #include <linux/interrupt.h> | |
15 | #include <linux/io.h> | |
16 | #include <linux/irq.h> | |
17 | #include <linux/kernel.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/of.h> | |
20 | #include <linux/of_device.h> | |
944c01a8 | 21 | #include <linux/pinctrl/consumer.h> |
5314987d | 22 | #include <linux/platform_device.h> |
c6547c2e | 23 | #include <linux/dma/imx-dma.h> |
944c01a8 | 24 | #include <linux/pm_runtime.h> |
5314987d GP |
25 | #include <linux/slab.h> |
26 | #include <linux/spi/spi.h> | |
27 | #include <linux/spi/spi_bitbang.h> | |
28 | #include <linux/types.h> | |
29 | ||
30 | #define DRIVER_NAME "fsl_lpspi" | |
31 | ||
944c01a8 HX |
32 | #define FSL_LPSPI_RPM_TIMEOUT 50 /* 50ms */ |
33 | ||
09c04466 CW |
34 | /* The maximum bytes that edma can transfer once.*/ |
35 | #define FSL_LPSPI_MAX_EDMA_BYTES ((1 << 15) - 1) | |
36 | ||
5314987d GP |
37 | /* i.MX7ULP LPSPI registers */ |
38 | #define IMX7ULP_VERID 0x0 | |
39 | #define IMX7ULP_PARAM 0x4 | |
40 | #define IMX7ULP_CR 0x10 | |
41 | #define IMX7ULP_SR 0x14 | |
42 | #define IMX7ULP_IER 0x18 | |
43 | #define IMX7ULP_DER 0x1c | |
44 | #define IMX7ULP_CFGR0 0x20 | |
45 | #define IMX7ULP_CFGR1 0x24 | |
46 | #define IMX7ULP_DMR0 0x30 | |
47 | #define IMX7ULP_DMR1 0x34 | |
48 | #define IMX7ULP_CCR 0x40 | |
49 | #define IMX7ULP_FCR 0x58 | |
50 | #define IMX7ULP_FSR 0x5c | |
51 | #define IMX7ULP_TCR 0x60 | |
52 | #define IMX7ULP_TDR 0x64 | |
53 | #define IMX7ULP_RSR 0x70 | |
54 | #define IMX7ULP_RDR 0x74 | |
55 | ||
56 | /* General control register field define */ | |
57 | #define CR_RRF BIT(9) | |
58 | #define CR_RTF BIT(8) | |
59 | #define CR_RST BIT(1) | |
60 | #define CR_MEN BIT(0) | |
6a130448 | 61 | #define SR_MBF BIT(24) |
5314987d | 62 | #define SR_TCF BIT(10) |
c23fdef8 | 63 | #define SR_FCF BIT(9) |
5314987d GP |
64 | #define SR_RDF BIT(1) |
65 | #define SR_TDF BIT(0) | |
66 | #define IER_TCIE BIT(10) | |
c23fdef8 | 67 | #define IER_FCIE BIT(9) |
5314987d GP |
68 | #define IER_RDIE BIT(1) |
69 | #define IER_TDIE BIT(0) | |
09c04466 CW |
70 | #define DER_RDDE BIT(1) |
71 | #define DER_TDDE BIT(0) | |
5314987d | 72 | #define CFGR1_PCSCFG BIT(27) |
bcd87317 | 73 | #define CFGR1_PINCFG (BIT(24)|BIT(25)) |
5314987d GP |
74 | #define CFGR1_PCSPOL BIT(8) |
75 | #define CFGR1_NOSTALL BIT(3) | |
76 | #define CFGR1_MASTER BIT(0) | |
69c8a9bc | 77 | #define FSR_TXCOUNT (0xFF) |
5314987d GP |
78 | #define RSR_RXEMPTY BIT(1) |
79 | #define TCR_CPOL BIT(31) | |
80 | #define TCR_CPHA BIT(30) | |
81 | #define TCR_CONT BIT(21) | |
82 | #define TCR_CONTC BIT(20) | |
83 | #define TCR_RXMSK BIT(19) | |
84 | #define TCR_TXMSK BIT(18) | |
85 | ||
5314987d GP |
86 | struct lpspi_config { |
87 | u8 bpw; | |
88 | u8 chip_select; | |
89 | u8 prescale; | |
90 | u16 mode; | |
91 | u32 speed_hz; | |
92 | }; | |
93 | ||
94 | struct fsl_lpspi_data { | |
95 | struct device *dev; | |
96 | void __iomem *base; | |
09c04466 | 97 | unsigned long base_phys; |
f5e5afdb CW |
98 | struct clk *clk_ipg; |
99 | struct clk *clk_per; | |
bcd87317 | 100 | bool is_slave; |
5f947746 | 101 | u32 num_cs; |
2a052590 | 102 | bool is_only_cs1; |
c7a40259 | 103 | bool is_first_byte; |
5314987d GP |
104 | |
105 | void *rx_buf; | |
106 | const void *tx_buf; | |
107 | void (*tx)(struct fsl_lpspi_data *); | |
108 | void (*rx)(struct fsl_lpspi_data *); | |
109 | ||
110 | u32 remain; | |
cf86874b | 111 | u8 watermark; |
5314987d GP |
112 | u8 txfifosize; |
113 | u8 rxfifosize; | |
114 | ||
115 | struct lpspi_config config; | |
116 | struct completion xfer_done; | |
bcd87317 CW |
117 | |
118 | bool slave_aborted; | |
c7a40259 | 119 | |
09c04466 CW |
120 | /* DMA */ |
121 | bool usedma; | |
122 | struct completion dma_rx_completion; | |
123 | struct completion dma_tx_completion; | |
5314987d GP |
124 | }; |
125 | ||
126 | static const struct of_device_id fsl_lpspi_dt_ids[] = { | |
127 | { .compatible = "fsl,imx7ulp-spi", }, | |
128 | { /* sentinel */ } | |
129 | }; | |
130 | MODULE_DEVICE_TABLE(of, fsl_lpspi_dt_ids); | |
131 | ||
132 | #define LPSPI_BUF_RX(type) \ | |
133 | static void fsl_lpspi_buf_rx_##type(struct fsl_lpspi_data *fsl_lpspi) \ | |
134 | { \ | |
135 | unsigned int val = readl(fsl_lpspi->base + IMX7ULP_RDR); \ | |
136 | \ | |
137 | if (fsl_lpspi->rx_buf) { \ | |
138 | *(type *)fsl_lpspi->rx_buf = val; \ | |
139 | fsl_lpspi->rx_buf += sizeof(type); \ | |
140 | } \ | |
141 | } | |
142 | ||
143 | #define LPSPI_BUF_TX(type) \ | |
144 | static void fsl_lpspi_buf_tx_##type(struct fsl_lpspi_data *fsl_lpspi) \ | |
145 | { \ | |
146 | type val = 0; \ | |
147 | \ | |
148 | if (fsl_lpspi->tx_buf) { \ | |
149 | val = *(type *)fsl_lpspi->tx_buf; \ | |
150 | fsl_lpspi->tx_buf += sizeof(type); \ | |
151 | } \ | |
152 | \ | |
153 | fsl_lpspi->remain -= sizeof(type); \ | |
154 | writel(val, fsl_lpspi->base + IMX7ULP_TDR); \ | |
155 | } | |
156 | ||
157 | LPSPI_BUF_RX(u8) | |
158 | LPSPI_BUF_TX(u8) | |
159 | LPSPI_BUF_RX(u16) | |
160 | LPSPI_BUF_TX(u16) | |
161 | LPSPI_BUF_RX(u32) | |
162 | LPSPI_BUF_TX(u32) | |
163 | ||
164 | static void fsl_lpspi_intctrl(struct fsl_lpspi_data *fsl_lpspi, | |
165 | unsigned int enable) | |
166 | { | |
167 | writel(enable, fsl_lpspi->base + IMX7ULP_IER); | |
168 | } | |
169 | ||
09c04466 CW |
170 | static int fsl_lpspi_bytes_per_word(const int bpw) |
171 | { | |
172 | return DIV_ROUND_UP(bpw, BITS_PER_BYTE); | |
173 | } | |
174 | ||
175 | static bool fsl_lpspi_can_dma(struct spi_controller *controller, | |
176 | struct spi_device *spi, | |
177 | struct spi_transfer *transfer) | |
178 | { | |
179 | unsigned int bytes_per_word; | |
180 | ||
181 | if (!controller->dma_rx) | |
182 | return false; | |
183 | ||
184 | bytes_per_word = fsl_lpspi_bytes_per_word(transfer->bits_per_word); | |
185 | ||
cb75b0c4 A |
186 | switch (bytes_per_word) { |
187 | case 1: | |
188 | case 2: | |
189 | case 4: | |
190 | break; | |
191 | default: | |
192 | return false; | |
09c04466 CW |
193 | } |
194 | ||
195 | return true; | |
196 | } | |
197 | ||
07d71557 | 198 | static int lpspi_prepare_xfer_hardware(struct spi_controller *controller) |
5314987d | 199 | { |
07d71557 CW |
200 | struct fsl_lpspi_data *fsl_lpspi = |
201 | spi_controller_get_devdata(controller); | |
f5e5afdb CW |
202 | int ret; |
203 | ||
a0367549 | 204 | ret = pm_runtime_resume_and_get(fsl_lpspi->dev); |
944c01a8 HX |
205 | if (ret < 0) { |
206 | dev_err(fsl_lpspi->dev, "failed to enable clock\n"); | |
f5e5afdb CW |
207 | return ret; |
208 | } | |
5314987d | 209 | |
f5e5afdb | 210 | return 0; |
5314987d GP |
211 | } |
212 | ||
07d71557 | 213 | static int lpspi_unprepare_xfer_hardware(struct spi_controller *controller) |
5314987d | 214 | { |
07d71557 CW |
215 | struct fsl_lpspi_data *fsl_lpspi = |
216 | spi_controller_get_devdata(controller); | |
5314987d | 217 | |
944c01a8 HX |
218 | pm_runtime_mark_last_busy(fsl_lpspi->dev); |
219 | pm_runtime_put_autosuspend(fsl_lpspi->dev); | |
5314987d GP |
220 | |
221 | return 0; | |
222 | } | |
223 | ||
5314987d GP |
224 | static void fsl_lpspi_write_tx_fifo(struct fsl_lpspi_data *fsl_lpspi) |
225 | { | |
226 | u8 txfifo_cnt; | |
c23fdef8 | 227 | u32 temp; |
5314987d GP |
228 | |
229 | txfifo_cnt = readl(fsl_lpspi->base + IMX7ULP_FSR) & 0xff; | |
230 | ||
231 | while (txfifo_cnt < fsl_lpspi->txfifosize) { | |
232 | if (!fsl_lpspi->remain) | |
233 | break; | |
234 | fsl_lpspi->tx(fsl_lpspi); | |
235 | txfifo_cnt++; | |
236 | } | |
237 | ||
c23fdef8 CW |
238 | if (txfifo_cnt < fsl_lpspi->txfifosize) { |
239 | if (!fsl_lpspi->is_slave) { | |
240 | temp = readl(fsl_lpspi->base + IMX7ULP_TCR); | |
241 | temp &= ~TCR_CONTC; | |
242 | writel(temp, fsl_lpspi->base + IMX7ULP_TCR); | |
243 | } | |
244 | ||
245 | fsl_lpspi_intctrl(fsl_lpspi, IER_FCIE); | |
246 | } else | |
5314987d GP |
247 | fsl_lpspi_intctrl(fsl_lpspi, IER_TDIE); |
248 | } | |
249 | ||
250 | static void fsl_lpspi_read_rx_fifo(struct fsl_lpspi_data *fsl_lpspi) | |
251 | { | |
252 | while (!(readl(fsl_lpspi->base + IMX7ULP_RSR) & RSR_RXEMPTY)) | |
253 | fsl_lpspi->rx(fsl_lpspi); | |
254 | } | |
255 | ||
c7a40259 | 256 | static void fsl_lpspi_set_cmd(struct fsl_lpspi_data *fsl_lpspi) |
5314987d GP |
257 | { |
258 | u32 temp = 0; | |
259 | ||
260 | temp |= fsl_lpspi->config.bpw - 1; | |
e3a49390 | 261 | temp |= (fsl_lpspi->config.mode & 0x3) << 30; |
2a052590 | 262 | temp |= (fsl_lpspi->config.chip_select & 0x3) << 24; |
bcd87317 CW |
263 | if (!fsl_lpspi->is_slave) { |
264 | temp |= fsl_lpspi->config.prescale << 27; | |
bcd87317 CW |
265 | /* |
266 | * Set TCR_CONT will keep SS asserted after current transfer. | |
267 | * For the first transfer, clear TCR_CONTC to assert SS. | |
268 | * For subsequent transfer, set TCR_CONTC to keep SS asserted. | |
269 | */ | |
09c04466 CW |
270 | if (!fsl_lpspi->usedma) { |
271 | temp |= TCR_CONT; | |
272 | if (fsl_lpspi->is_first_byte) | |
273 | temp &= ~TCR_CONTC; | |
274 | else | |
275 | temp |= TCR_CONTC; | |
276 | } | |
bcd87317 | 277 | } |
5314987d GP |
278 | writel(temp, fsl_lpspi->base + IMX7ULP_TCR); |
279 | ||
280 | dev_dbg(fsl_lpspi->dev, "TCR=0x%x\n", temp); | |
281 | } | |
282 | ||
283 | static void fsl_lpspi_set_watermark(struct fsl_lpspi_data *fsl_lpspi) | |
284 | { | |
5314987d GP |
285 | u32 temp; |
286 | ||
09c04466 CW |
287 | if (!fsl_lpspi->usedma) |
288 | temp = fsl_lpspi->watermark >> 1 | | |
289 | (fsl_lpspi->watermark >> 1) << 16; | |
290 | else | |
291 | temp = fsl_lpspi->watermark >> 1; | |
5314987d GP |
292 | |
293 | writel(temp, fsl_lpspi->base + IMX7ULP_FCR); | |
294 | ||
295 | dev_dbg(fsl_lpspi->dev, "FCR=0x%x\n", temp); | |
296 | } | |
297 | ||
298 | static int fsl_lpspi_set_bitrate(struct fsl_lpspi_data *fsl_lpspi) | |
299 | { | |
300 | struct lpspi_config config = fsl_lpspi->config; | |
301 | unsigned int perclk_rate, scldiv; | |
302 | u8 prescale; | |
303 | ||
f5e5afdb | 304 | perclk_rate = clk_get_rate(fsl_lpspi->clk_per); |
77736a98 CW |
305 | |
306 | if (config.speed_hz > perclk_rate / 2) { | |
307 | dev_err(fsl_lpspi->dev, | |
308 | "per-clk should be at least two times of transfer speed"); | |
309 | return -EINVAL; | |
310 | } | |
311 | ||
5314987d | 312 | for (prescale = 0; prescale < 8; prescale++) { |
2fa98705 | 313 | scldiv = perclk_rate / config.speed_hz / (1 << prescale) - 2; |
5314987d GP |
314 | if (scldiv < 256) { |
315 | fsl_lpspi->config.prescale = prescale; | |
316 | break; | |
317 | } | |
318 | } | |
319 | ||
2fa98705 | 320 | if (scldiv >= 256) |
5314987d GP |
321 | return -EINVAL; |
322 | ||
cf86874b CW |
323 | writel(scldiv | (scldiv << 8) | ((scldiv >> 1) << 16), |
324 | fsl_lpspi->base + IMX7ULP_CCR); | |
5314987d | 325 | |
4e3891a5 | 326 | dev_dbg(fsl_lpspi->dev, "perclk=%d, speed=%d, prescale=%d, scldiv=%d\n", |
5314987d GP |
327 | perclk_rate, config.speed_hz, prescale, scldiv); |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
09c04466 CW |
332 | static int fsl_lpspi_dma_configure(struct spi_controller *controller) |
333 | { | |
334 | int ret; | |
335 | enum dma_slave_buswidth buswidth; | |
336 | struct dma_slave_config rx = {}, tx = {}; | |
337 | struct fsl_lpspi_data *fsl_lpspi = | |
338 | spi_controller_get_devdata(controller); | |
339 | ||
340 | switch (fsl_lpspi_bytes_per_word(fsl_lpspi->config.bpw)) { | |
341 | case 4: | |
342 | buswidth = DMA_SLAVE_BUSWIDTH_4_BYTES; | |
343 | break; | |
344 | case 2: | |
345 | buswidth = DMA_SLAVE_BUSWIDTH_2_BYTES; | |
346 | break; | |
347 | case 1: | |
348 | buswidth = DMA_SLAVE_BUSWIDTH_1_BYTE; | |
349 | break; | |
350 | default: | |
351 | return -EINVAL; | |
352 | } | |
353 | ||
354 | tx.direction = DMA_MEM_TO_DEV; | |
355 | tx.dst_addr = fsl_lpspi->base_phys + IMX7ULP_TDR; | |
356 | tx.dst_addr_width = buswidth; | |
357 | tx.dst_maxburst = 1; | |
358 | ret = dmaengine_slave_config(controller->dma_tx, &tx); | |
359 | if (ret) { | |
360 | dev_err(fsl_lpspi->dev, "TX dma configuration failed with %d\n", | |
361 | ret); | |
362 | return ret; | |
363 | } | |
364 | ||
365 | rx.direction = DMA_DEV_TO_MEM; | |
366 | rx.src_addr = fsl_lpspi->base_phys + IMX7ULP_RDR; | |
367 | rx.src_addr_width = buswidth; | |
368 | rx.src_maxburst = 1; | |
369 | ret = dmaengine_slave_config(controller->dma_rx, &rx); | |
370 | if (ret) { | |
371 | dev_err(fsl_lpspi->dev, "RX dma configuration failed with %d\n", | |
372 | ret); | |
373 | return ret; | |
374 | } | |
375 | ||
376 | return 0; | |
377 | } | |
378 | ||
5314987d GP |
379 | static int fsl_lpspi_config(struct fsl_lpspi_data *fsl_lpspi) |
380 | { | |
381 | u32 temp; | |
382 | int ret; | |
383 | ||
bcd87317 CW |
384 | if (!fsl_lpspi->is_slave) { |
385 | ret = fsl_lpspi_set_bitrate(fsl_lpspi); | |
386 | if (ret) | |
387 | return ret; | |
388 | } | |
5314987d GP |
389 | |
390 | fsl_lpspi_set_watermark(fsl_lpspi); | |
391 | ||
bcd87317 CW |
392 | if (!fsl_lpspi->is_slave) |
393 | temp = CFGR1_MASTER; | |
394 | else | |
395 | temp = CFGR1_PINCFG; | |
5314987d GP |
396 | if (fsl_lpspi->config.mode & SPI_CS_HIGH) |
397 | temp |= CFGR1_PCSPOL; | |
398 | writel(temp, fsl_lpspi->base + IMX7ULP_CFGR1); | |
399 | ||
400 | temp = readl(fsl_lpspi->base + IMX7ULP_CR); | |
401 | temp |= CR_RRF | CR_RTF | CR_MEN; | |
402 | writel(temp, fsl_lpspi->base + IMX7ULP_CR); | |
403 | ||
09c04466 CW |
404 | temp = 0; |
405 | if (fsl_lpspi->usedma) | |
406 | temp = DER_TDDE | DER_RDDE; | |
407 | writel(temp, fsl_lpspi->base + IMX7ULP_DER); | |
408 | ||
5314987d GP |
409 | return 0; |
410 | } | |
411 | ||
09c04466 CW |
412 | static int fsl_lpspi_setup_transfer(struct spi_controller *controller, |
413 | struct spi_device *spi, | |
5314987d GP |
414 | struct spi_transfer *t) |
415 | { | |
07d71557 CW |
416 | struct fsl_lpspi_data *fsl_lpspi = |
417 | spi_controller_get_devdata(spi->controller); | |
5314987d | 418 | |
578465ea CW |
419 | if (t == NULL) |
420 | return -EINVAL; | |
421 | ||
5314987d | 422 | fsl_lpspi->config.mode = spi->mode; |
578465ea CW |
423 | fsl_lpspi->config.bpw = t->bits_per_word; |
424 | fsl_lpspi->config.speed_hz = t->speed_hz; | |
2a052590 CW |
425 | if (fsl_lpspi->is_only_cs1) |
426 | fsl_lpspi->config.chip_select = 1; | |
427 | else | |
9e264f3f | 428 | fsl_lpspi->config.chip_select = spi_get_chipselect(spi, 0); |
5314987d GP |
429 | |
430 | if (!fsl_lpspi->config.speed_hz) | |
431 | fsl_lpspi->config.speed_hz = spi->max_speed_hz; | |
432 | if (!fsl_lpspi->config.bpw) | |
433 | fsl_lpspi->config.bpw = spi->bits_per_word; | |
434 | ||
435 | /* Initialize the functions for transfer */ | |
436 | if (fsl_lpspi->config.bpw <= 8) { | |
437 | fsl_lpspi->rx = fsl_lpspi_buf_rx_u8; | |
438 | fsl_lpspi->tx = fsl_lpspi_buf_tx_u8; | |
439 | } else if (fsl_lpspi->config.bpw <= 16) { | |
440 | fsl_lpspi->rx = fsl_lpspi_buf_rx_u16; | |
441 | fsl_lpspi->tx = fsl_lpspi_buf_tx_u16; | |
442 | } else { | |
443 | fsl_lpspi->rx = fsl_lpspi_buf_rx_u32; | |
444 | fsl_lpspi->tx = fsl_lpspi_buf_tx_u32; | |
445 | } | |
446 | ||
cf86874b CW |
447 | if (t->len <= fsl_lpspi->txfifosize) |
448 | fsl_lpspi->watermark = t->len; | |
449 | else | |
450 | fsl_lpspi->watermark = fsl_lpspi->txfifosize; | |
451 | ||
09c04466 | 452 | if (fsl_lpspi_can_dma(controller, spi, t)) |
a68735d7 | 453 | fsl_lpspi->usedma = true; |
09c04466 | 454 | else |
a68735d7 | 455 | fsl_lpspi->usedma = false; |
09c04466 | 456 | |
77736a98 | 457 | return fsl_lpspi_config(fsl_lpspi); |
5314987d GP |
458 | } |
459 | ||
bcd87317 CW |
460 | static int fsl_lpspi_slave_abort(struct spi_controller *controller) |
461 | { | |
462 | struct fsl_lpspi_data *fsl_lpspi = | |
463 | spi_controller_get_devdata(controller); | |
464 | ||
465 | fsl_lpspi->slave_aborted = true; | |
8863eca8 CW |
466 | if (!fsl_lpspi->usedma) |
467 | complete(&fsl_lpspi->xfer_done); | |
468 | else { | |
469 | complete(&fsl_lpspi->dma_tx_completion); | |
470 | complete(&fsl_lpspi->dma_rx_completion); | |
471 | } | |
472 | ||
bcd87317 CW |
473 | return 0; |
474 | } | |
475 | ||
476 | static int fsl_lpspi_wait_for_completion(struct spi_controller *controller) | |
477 | { | |
478 | struct fsl_lpspi_data *fsl_lpspi = | |
479 | spi_controller_get_devdata(controller); | |
480 | ||
481 | if (fsl_lpspi->is_slave) { | |
482 | if (wait_for_completion_interruptible(&fsl_lpspi->xfer_done) || | |
483 | fsl_lpspi->slave_aborted) { | |
484 | dev_dbg(fsl_lpspi->dev, "interrupted\n"); | |
485 | return -EINTR; | |
486 | } | |
487 | } else { | |
488 | if (!wait_for_completion_timeout(&fsl_lpspi->xfer_done, HZ)) { | |
489 | dev_dbg(fsl_lpspi->dev, "wait for completion timeout\n"); | |
490 | return -ETIMEDOUT; | |
491 | } | |
492 | } | |
493 | ||
494 | return 0; | |
495 | } | |
496 | ||
a15dc3d6 CW |
497 | static int fsl_lpspi_reset(struct fsl_lpspi_data *fsl_lpspi) |
498 | { | |
499 | u32 temp; | |
500 | ||
09c04466 CW |
501 | if (!fsl_lpspi->usedma) { |
502 | /* Disable all interrupt */ | |
503 | fsl_lpspi_intctrl(fsl_lpspi, 0); | |
504 | } | |
a15dc3d6 CW |
505 | |
506 | /* W1C for all flags in SR */ | |
507 | temp = 0x3F << 8; | |
508 | writel(temp, fsl_lpspi->base + IMX7ULP_SR); | |
509 | ||
510 | /* Clear FIFO and disable module */ | |
511 | temp = CR_RRF | CR_RTF; | |
512 | writel(temp, fsl_lpspi->base + IMX7ULP_CR); | |
513 | ||
514 | return 0; | |
515 | } | |
516 | ||
09c04466 CW |
517 | static void fsl_lpspi_dma_rx_callback(void *cookie) |
518 | { | |
519 | struct fsl_lpspi_data *fsl_lpspi = (struct fsl_lpspi_data *)cookie; | |
520 | ||
521 | complete(&fsl_lpspi->dma_rx_completion); | |
522 | } | |
523 | ||
524 | static void fsl_lpspi_dma_tx_callback(void *cookie) | |
525 | { | |
526 | struct fsl_lpspi_data *fsl_lpspi = (struct fsl_lpspi_data *)cookie; | |
527 | ||
528 | complete(&fsl_lpspi->dma_tx_completion); | |
529 | } | |
530 | ||
531 | static int fsl_lpspi_calculate_timeout(struct fsl_lpspi_data *fsl_lpspi, | |
532 | int size) | |
533 | { | |
534 | unsigned long timeout = 0; | |
535 | ||
536 | /* Time with actual data transfer and CS change delay related to HW */ | |
537 | timeout = (8 + 4) * size / fsl_lpspi->config.speed_hz; | |
538 | ||
539 | /* Add extra second for scheduler related activities */ | |
540 | timeout += 1; | |
541 | ||
542 | /* Double calculated timeout */ | |
543 | return msecs_to_jiffies(2 * timeout * MSEC_PER_SEC); | |
544 | } | |
545 | ||
546 | static int fsl_lpspi_dma_transfer(struct spi_controller *controller, | |
547 | struct fsl_lpspi_data *fsl_lpspi, | |
548 | struct spi_transfer *transfer) | |
549 | { | |
550 | struct dma_async_tx_descriptor *desc_tx, *desc_rx; | |
551 | unsigned long transfer_timeout; | |
552 | unsigned long timeout; | |
553 | struct sg_table *tx = &transfer->tx_sg, *rx = &transfer->rx_sg; | |
554 | int ret; | |
555 | ||
556 | ret = fsl_lpspi_dma_configure(controller); | |
557 | if (ret) | |
558 | return ret; | |
559 | ||
560 | desc_rx = dmaengine_prep_slave_sg(controller->dma_rx, | |
561 | rx->sgl, rx->nents, DMA_DEV_TO_MEM, | |
562 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
563 | if (!desc_rx) | |
564 | return -EINVAL; | |
565 | ||
566 | desc_rx->callback = fsl_lpspi_dma_rx_callback; | |
567 | desc_rx->callback_param = (void *)fsl_lpspi; | |
568 | dmaengine_submit(desc_rx); | |
569 | reinit_completion(&fsl_lpspi->dma_rx_completion); | |
570 | dma_async_issue_pending(controller->dma_rx); | |
571 | ||
572 | desc_tx = dmaengine_prep_slave_sg(controller->dma_tx, | |
573 | tx->sgl, tx->nents, DMA_MEM_TO_DEV, | |
574 | DMA_PREP_INTERRUPT | DMA_CTRL_ACK); | |
575 | if (!desc_tx) { | |
576 | dmaengine_terminate_all(controller->dma_tx); | |
577 | return -EINVAL; | |
578 | } | |
579 | ||
580 | desc_tx->callback = fsl_lpspi_dma_tx_callback; | |
581 | desc_tx->callback_param = (void *)fsl_lpspi; | |
582 | dmaengine_submit(desc_tx); | |
583 | reinit_completion(&fsl_lpspi->dma_tx_completion); | |
584 | dma_async_issue_pending(controller->dma_tx); | |
585 | ||
586 | fsl_lpspi->slave_aborted = false; | |
587 | ||
588 | if (!fsl_lpspi->is_slave) { | |
589 | transfer_timeout = fsl_lpspi_calculate_timeout(fsl_lpspi, | |
590 | transfer->len); | |
591 | ||
592 | /* Wait eDMA to finish the data transfer.*/ | |
593 | timeout = wait_for_completion_timeout(&fsl_lpspi->dma_tx_completion, | |
594 | transfer_timeout); | |
595 | if (!timeout) { | |
596 | dev_err(fsl_lpspi->dev, "I/O Error in DMA TX\n"); | |
597 | dmaengine_terminate_all(controller->dma_tx); | |
598 | dmaengine_terminate_all(controller->dma_rx); | |
599 | fsl_lpspi_reset(fsl_lpspi); | |
600 | return -ETIMEDOUT; | |
601 | } | |
602 | ||
603 | timeout = wait_for_completion_timeout(&fsl_lpspi->dma_rx_completion, | |
604 | transfer_timeout); | |
605 | if (!timeout) { | |
606 | dev_err(fsl_lpspi->dev, "I/O Error in DMA RX\n"); | |
607 | dmaengine_terminate_all(controller->dma_tx); | |
608 | dmaengine_terminate_all(controller->dma_rx); | |
609 | fsl_lpspi_reset(fsl_lpspi); | |
610 | return -ETIMEDOUT; | |
611 | } | |
612 | } else { | |
613 | if (wait_for_completion_interruptible(&fsl_lpspi->dma_tx_completion) || | |
614 | fsl_lpspi->slave_aborted) { | |
615 | dev_dbg(fsl_lpspi->dev, | |
616 | "I/O Error in DMA TX interrupted\n"); | |
617 | dmaengine_terminate_all(controller->dma_tx); | |
618 | dmaengine_terminate_all(controller->dma_rx); | |
619 | fsl_lpspi_reset(fsl_lpspi); | |
620 | return -EINTR; | |
621 | } | |
622 | ||
623 | if (wait_for_completion_interruptible(&fsl_lpspi->dma_rx_completion) || | |
624 | fsl_lpspi->slave_aborted) { | |
625 | dev_dbg(fsl_lpspi->dev, | |
626 | "I/O Error in DMA RX interrupted\n"); | |
627 | dmaengine_terminate_all(controller->dma_tx); | |
628 | dmaengine_terminate_all(controller->dma_rx); | |
629 | fsl_lpspi_reset(fsl_lpspi); | |
630 | return -EINTR; | |
631 | } | |
632 | } | |
633 | ||
634 | fsl_lpspi_reset(fsl_lpspi); | |
635 | ||
636 | return 0; | |
637 | } | |
638 | ||
639 | static void fsl_lpspi_dma_exit(struct spi_controller *controller) | |
640 | { | |
641 | if (controller->dma_rx) { | |
642 | dma_release_channel(controller->dma_rx); | |
643 | controller->dma_rx = NULL; | |
644 | } | |
645 | ||
646 | if (controller->dma_tx) { | |
647 | dma_release_channel(controller->dma_tx); | |
648 | controller->dma_tx = NULL; | |
649 | } | |
650 | } | |
651 | ||
652 | static int fsl_lpspi_dma_init(struct device *dev, | |
653 | struct fsl_lpspi_data *fsl_lpspi, | |
654 | struct spi_controller *controller) | |
655 | { | |
656 | int ret; | |
657 | ||
658 | /* Prepare for TX DMA: */ | |
2e33f310 | 659 | controller->dma_tx = dma_request_chan(dev, "tx"); |
09c04466 CW |
660 | if (IS_ERR(controller->dma_tx)) { |
661 | ret = PTR_ERR(controller->dma_tx); | |
662 | dev_dbg(dev, "can't get the TX DMA channel, error %d!\n", ret); | |
663 | controller->dma_tx = NULL; | |
664 | goto err; | |
665 | } | |
666 | ||
667 | /* Prepare for RX DMA: */ | |
2e33f310 | 668 | controller->dma_rx = dma_request_chan(dev, "rx"); |
09c04466 CW |
669 | if (IS_ERR(controller->dma_rx)) { |
670 | ret = PTR_ERR(controller->dma_rx); | |
671 | dev_dbg(dev, "can't get the RX DMA channel, error %d\n", ret); | |
672 | controller->dma_rx = NULL; | |
673 | goto err; | |
674 | } | |
675 | ||
676 | init_completion(&fsl_lpspi->dma_rx_completion); | |
677 | init_completion(&fsl_lpspi->dma_tx_completion); | |
678 | controller->can_dma = fsl_lpspi_can_dma; | |
679 | controller->max_dma_len = FSL_LPSPI_MAX_EDMA_BYTES; | |
680 | ||
681 | return 0; | |
682 | err: | |
683 | fsl_lpspi_dma_exit(controller); | |
684 | return ret; | |
685 | } | |
686 | ||
c7a40259 | 687 | static int fsl_lpspi_pio_transfer(struct spi_controller *controller, |
5314987d GP |
688 | struct spi_transfer *t) |
689 | { | |
07d71557 CW |
690 | struct fsl_lpspi_data *fsl_lpspi = |
691 | spi_controller_get_devdata(controller); | |
5314987d GP |
692 | int ret; |
693 | ||
694 | fsl_lpspi->tx_buf = t->tx_buf; | |
695 | fsl_lpspi->rx_buf = t->rx_buf; | |
696 | fsl_lpspi->remain = t->len; | |
697 | ||
698 | reinit_completion(&fsl_lpspi->xfer_done); | |
bcd87317 CW |
699 | fsl_lpspi->slave_aborted = false; |
700 | ||
5314987d | 701 | fsl_lpspi_write_tx_fifo(fsl_lpspi); |
d2ad0a62 | 702 | |
bcd87317 CW |
703 | ret = fsl_lpspi_wait_for_completion(controller); |
704 | if (ret) | |
705 | return ret; | |
5314987d | 706 | |
a15dc3d6 CW |
707 | fsl_lpspi_reset(fsl_lpspi); |
708 | ||
d989eed2 | 709 | return 0; |
5314987d GP |
710 | } |
711 | ||
c7a40259 CW |
712 | static int fsl_lpspi_transfer_one(struct spi_controller *controller, |
713 | struct spi_device *spi, | |
714 | struct spi_transfer *t) | |
5314987d | 715 | { |
07d71557 | 716 | struct fsl_lpspi_data *fsl_lpspi = |
c7a40259 CW |
717 | spi_controller_get_devdata(controller); |
718 | int ret; | |
5314987d | 719 | |
c7a40259 | 720 | fsl_lpspi->is_first_byte = true; |
09c04466 | 721 | ret = fsl_lpspi_setup_transfer(controller, spi, t); |
c7a40259 CW |
722 | if (ret < 0) |
723 | return ret; | |
5314987d | 724 | |
c7a40259 CW |
725 | fsl_lpspi_set_cmd(fsl_lpspi); |
726 | fsl_lpspi->is_first_byte = false; | |
5314987d | 727 | |
09c04466 CW |
728 | if (fsl_lpspi->usedma) |
729 | ret = fsl_lpspi_dma_transfer(controller, fsl_lpspi, t); | |
730 | else | |
731 | ret = fsl_lpspi_pio_transfer(controller, t); | |
c7a40259 CW |
732 | if (ret < 0) |
733 | return ret; | |
5314987d | 734 | |
c7a40259 | 735 | return 0; |
5314987d GP |
736 | } |
737 | ||
738 | static irqreturn_t fsl_lpspi_isr(int irq, void *dev_id) | |
739 | { | |
c23fdef8 | 740 | u32 temp_SR, temp_IER; |
5314987d | 741 | struct fsl_lpspi_data *fsl_lpspi = dev_id; |
5314987d | 742 | |
c23fdef8 | 743 | temp_IER = readl(fsl_lpspi->base + IMX7ULP_IER); |
5314987d | 744 | fsl_lpspi_intctrl(fsl_lpspi, 0); |
c23fdef8 | 745 | temp_SR = readl(fsl_lpspi->base + IMX7ULP_SR); |
5314987d GP |
746 | |
747 | fsl_lpspi_read_rx_fifo(fsl_lpspi); | |
748 | ||
c23fdef8 | 749 | if ((temp_SR & SR_TDF) && (temp_IER & IER_TDIE)) { |
5314987d | 750 | fsl_lpspi_write_tx_fifo(fsl_lpspi); |
c23fdef8 CW |
751 | return IRQ_HANDLED; |
752 | } | |
5314987d | 753 | |
6a130448 | 754 | if (temp_SR & SR_MBF || |
69c8a9bc | 755 | readl(fsl_lpspi->base + IMX7ULP_FSR) & FSR_TXCOUNT) { |
6a130448 CW |
756 | writel(SR_FCF, fsl_lpspi->base + IMX7ULP_SR); |
757 | fsl_lpspi_intctrl(fsl_lpspi, IER_FCIE); | |
758 | return IRQ_HANDLED; | |
759 | } | |
760 | ||
c23fdef8 CW |
761 | if (temp_SR & SR_FCF && (temp_IER & IER_FCIE)) { |
762 | writel(SR_FCF, fsl_lpspi->base + IMX7ULP_SR); | |
1b0a2b2d | 763 | complete(&fsl_lpspi->xfer_done); |
5314987d GP |
764 | return IRQ_HANDLED; |
765 | } | |
766 | ||
767 | return IRQ_NONE; | |
768 | } | |
769 | ||
a18656ea | 770 | #ifdef CONFIG_PM |
809b169a | 771 | static int fsl_lpspi_runtime_resume(struct device *dev) |
944c01a8 | 772 | { |
6599be34 AL |
773 | struct spi_controller *controller = dev_get_drvdata(dev); |
774 | struct fsl_lpspi_data *fsl_lpspi; | |
944c01a8 HX |
775 | int ret; |
776 | ||
6599be34 AL |
777 | fsl_lpspi = spi_controller_get_devdata(controller); |
778 | ||
944c01a8 HX |
779 | ret = clk_prepare_enable(fsl_lpspi->clk_per); |
780 | if (ret) | |
781 | return ret; | |
782 | ||
783 | ret = clk_prepare_enable(fsl_lpspi->clk_ipg); | |
784 | if (ret) { | |
785 | clk_disable_unprepare(fsl_lpspi->clk_per); | |
786 | return ret; | |
787 | } | |
788 | ||
789 | return 0; | |
790 | } | |
791 | ||
809b169a | 792 | static int fsl_lpspi_runtime_suspend(struct device *dev) |
944c01a8 | 793 | { |
6599be34 AL |
794 | struct spi_controller *controller = dev_get_drvdata(dev); |
795 | struct fsl_lpspi_data *fsl_lpspi; | |
796 | ||
797 | fsl_lpspi = spi_controller_get_devdata(controller); | |
944c01a8 HX |
798 | |
799 | clk_disable_unprepare(fsl_lpspi->clk_per); | |
800 | clk_disable_unprepare(fsl_lpspi->clk_ipg); | |
801 | ||
802 | return 0; | |
803 | } | |
a18656ea | 804 | #endif |
944c01a8 HX |
805 | |
806 | static int fsl_lpspi_init_rpm(struct fsl_lpspi_data *fsl_lpspi) | |
807 | { | |
808 | struct device *dev = fsl_lpspi->dev; | |
809 | ||
810 | pm_runtime_enable(dev); | |
811 | pm_runtime_set_autosuspend_delay(dev, FSL_LPSPI_RPM_TIMEOUT); | |
812 | pm_runtime_use_autosuspend(dev); | |
813 | ||
814 | return 0; | |
815 | } | |
816 | ||
5314987d GP |
817 | static int fsl_lpspi_probe(struct platform_device *pdev) |
818 | { | |
819 | struct fsl_lpspi_data *fsl_lpspi; | |
07d71557 | 820 | struct spi_controller *controller; |
5314987d | 821 | struct resource *res; |
8cdcd8ae | 822 | int ret, irq; |
b88a0dea | 823 | u32 temp; |
5d785141 | 824 | bool is_slave; |
5314987d | 825 | |
5d785141 AL |
826 | is_slave = of_property_read_bool((&pdev->dev)->of_node, "spi-slave"); |
827 | if (is_slave) | |
bcd87317 CW |
828 | controller = spi_alloc_slave(&pdev->dev, |
829 | sizeof(struct fsl_lpspi_data)); | |
830 | else | |
831 | controller = spi_alloc_master(&pdev->dev, | |
07d71557 | 832 | sizeof(struct fsl_lpspi_data)); |
bcd87317 | 833 | |
07d71557 | 834 | if (!controller) |
5314987d GP |
835 | return -ENOMEM; |
836 | ||
07d71557 | 837 | platform_set_drvdata(pdev, controller); |
5314987d | 838 | |
07d71557 | 839 | fsl_lpspi = spi_controller_get_devdata(controller); |
5314987d | 840 | fsl_lpspi->dev = &pdev->dev; |
5d785141 | 841 | fsl_lpspi->is_slave = is_slave; |
2a052590 CW |
842 | fsl_lpspi->is_only_cs1 = of_property_read_bool((&pdev->dev)->of_node, |
843 | "fsl,spi-only-use-cs1-sel"); | |
5f947746 HX |
844 | if (of_property_read_u32((&pdev->dev)->of_node, "num-cs", |
845 | &fsl_lpspi->num_cs)) | |
846 | fsl_lpspi->num_cs = 1; | |
5314987d | 847 | |
bc3a8b29 PS |
848 | controller->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32); |
849 | controller->transfer_one = fsl_lpspi_transfer_one; | |
850 | controller->prepare_transfer_hardware = lpspi_prepare_xfer_hardware; | |
851 | controller->unprepare_transfer_hardware = lpspi_unprepare_xfer_hardware; | |
852 | controller->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH; | |
853 | controller->flags = SPI_MASTER_MUST_RX | SPI_MASTER_MUST_TX; | |
854 | controller->dev.of_node = pdev->dev.of_node; | |
855 | controller->bus_num = pdev->id; | |
5f947746 | 856 | controller->num_chipselect = fsl_lpspi->num_cs; |
bc3a8b29 | 857 | controller->slave_abort = fsl_lpspi_slave_abort; |
8cdcd8ae LW |
858 | if (!fsl_lpspi->is_slave) |
859 | controller->use_gpio_descriptors = true; | |
bc3a8b29 | 860 | |
5314987d GP |
861 | init_completion(&fsl_lpspi->xfer_done); |
862 | ||
c9e1bb72 | 863 | fsl_lpspi->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); |
5314987d GP |
864 | if (IS_ERR(fsl_lpspi->base)) { |
865 | ret = PTR_ERR(fsl_lpspi->base); | |
07d71557 | 866 | goto out_controller_put; |
5314987d | 867 | } |
09c04466 | 868 | fsl_lpspi->base_phys = res->start; |
5314987d GP |
869 | |
870 | irq = platform_get_irq(pdev, 0); | |
871 | if (irq < 0) { | |
872 | ret = irq; | |
07d71557 | 873 | goto out_controller_put; |
5314987d GP |
874 | } |
875 | ||
876 | ret = devm_request_irq(&pdev->dev, irq, fsl_lpspi_isr, 0, | |
877 | dev_name(&pdev->dev), fsl_lpspi); | |
878 | if (ret) { | |
879 | dev_err(&pdev->dev, "can't get irq%d: %d\n", irq, ret); | |
07d71557 | 880 | goto out_controller_put; |
5314987d GP |
881 | } |
882 | ||
f5e5afdb CW |
883 | fsl_lpspi->clk_per = devm_clk_get(&pdev->dev, "per"); |
884 | if (IS_ERR(fsl_lpspi->clk_per)) { | |
885 | ret = PTR_ERR(fsl_lpspi->clk_per); | |
886 | goto out_controller_put; | |
887 | } | |
888 | ||
889 | fsl_lpspi->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); | |
890 | if (IS_ERR(fsl_lpspi->clk_ipg)) { | |
891 | ret = PTR_ERR(fsl_lpspi->clk_ipg); | |
892 | goto out_controller_put; | |
893 | } | |
894 | ||
944c01a8 HX |
895 | /* enable the clock */ |
896 | ret = fsl_lpspi_init_rpm(fsl_lpspi); | |
897 | if (ret) | |
07d71557 | 898 | goto out_controller_put; |
5314987d | 899 | |
944c01a8 HX |
900 | ret = pm_runtime_get_sync(fsl_lpspi->dev); |
901 | if (ret < 0) { | |
902 | dev_err(fsl_lpspi->dev, "failed to enable clock\n"); | |
8d728808 | 903 | goto out_pm_get; |
b88a0dea GP |
904 | } |
905 | ||
906 | temp = readl(fsl_lpspi->base + IMX7ULP_PARAM); | |
907 | fsl_lpspi->txfifosize = 1 << (temp & 0x0f); | |
908 | fsl_lpspi->rxfifosize = 1 << ((temp >> 8) & 0x0f); | |
909 | ||
09c04466 CW |
910 | ret = fsl_lpspi_dma_init(&pdev->dev, fsl_lpspi, controller); |
911 | if (ret == -EPROBE_DEFER) | |
8d728808 | 912 | goto out_pm_get; |
09c04466 CW |
913 | if (ret < 0) |
914 | dev_err(&pdev->dev, "dma setup error %d, use pio\n", ret); | |
9728fb3c CW |
915 | else |
916 | /* | |
917 | * disable LPSPI module IRQ when enable DMA mode successfully, | |
918 | * to prevent the unexpected LPSPI module IRQ events. | |
919 | */ | |
920 | disable_irq(irq); | |
09c04466 | 921 | |
16d79185 CW |
922 | ret = devm_spi_register_controller(&pdev->dev, controller); |
923 | if (ret < 0) { | |
0df874c6 | 924 | dev_err_probe(&pdev->dev, ret, "spi_register_controller error\n"); |
f02bff30 | 925 | goto free_dma; |
16d79185 CW |
926 | } |
927 | ||
2abbae5a CW |
928 | pm_runtime_mark_last_busy(fsl_lpspi->dev); |
929 | pm_runtime_put_autosuspend(fsl_lpspi->dev); | |
930 | ||
5314987d GP |
931 | return 0; |
932 | ||
f02bff30 AS |
933 | free_dma: |
934 | fsl_lpspi_dma_exit(controller); | |
8d728808 | 935 | out_pm_get: |
2abbae5a CW |
936 | pm_runtime_dont_use_autosuspend(fsl_lpspi->dev); |
937 | pm_runtime_put_sync(fsl_lpspi->dev); | |
938 | pm_runtime_disable(fsl_lpspi->dev); | |
07d71557 CW |
939 | out_controller_put: |
940 | spi_controller_put(controller); | |
5314987d GP |
941 | |
942 | return ret; | |
943 | } | |
944 | ||
edd49c89 | 945 | static void fsl_lpspi_remove(struct platform_device *pdev) |
5314987d | 946 | { |
07d71557 CW |
947 | struct spi_controller *controller = platform_get_drvdata(pdev); |
948 | struct fsl_lpspi_data *fsl_lpspi = | |
949 | spi_controller_get_devdata(controller); | |
5314987d | 950 | |
f02bff30 AS |
951 | fsl_lpspi_dma_exit(controller); |
952 | ||
944c01a8 | 953 | pm_runtime_disable(fsl_lpspi->dev); |
944c01a8 HX |
954 | } |
955 | ||
c3158a89 | 956 | static int __maybe_unused fsl_lpspi_suspend(struct device *dev) |
944c01a8 | 957 | { |
944c01a8 | 958 | pinctrl_pm_select_sleep_state(dev); |
014eac3e | 959 | return pm_runtime_force_suspend(dev); |
944c01a8 HX |
960 | } |
961 | ||
c3158a89 | 962 | static int __maybe_unused fsl_lpspi_resume(struct device *dev) |
944c01a8 HX |
963 | { |
964 | int ret; | |
965 | ||
966 | ret = pm_runtime_force_resume(dev); | |
967 | if (ret) { | |
968 | dev_err(dev, "Error in resume: %d\n", ret); | |
969 | return ret; | |
970 | } | |
971 | ||
972 | pinctrl_pm_select_default_state(dev); | |
5314987d GP |
973 | |
974 | return 0; | |
975 | } | |
944c01a8 HX |
976 | |
977 | static const struct dev_pm_ops fsl_lpspi_pm_ops = { | |
978 | SET_RUNTIME_PM_OPS(fsl_lpspi_runtime_suspend, | |
979 | fsl_lpspi_runtime_resume, NULL) | |
980 | SET_SYSTEM_SLEEP_PM_OPS(fsl_lpspi_suspend, fsl_lpspi_resume) | |
981 | }; | |
5314987d GP |
982 | |
983 | static struct platform_driver fsl_lpspi_driver = { | |
984 | .driver = { | |
102ecc47 GP |
985 | .name = DRIVER_NAME, |
986 | .of_match_table = fsl_lpspi_dt_ids, | |
944c01a8 | 987 | .pm = &fsl_lpspi_pm_ops, |
102ecc47 | 988 | }, |
5314987d | 989 | .probe = fsl_lpspi_probe, |
edd49c89 | 990 | .remove_new = fsl_lpspi_remove, |
5314987d GP |
991 | }; |
992 | module_platform_driver(fsl_lpspi_driver); | |
993 | ||
07d71557 | 994 | MODULE_DESCRIPTION("LPSPI Controller driver"); |
5314987d | 995 | MODULE_AUTHOR("Gao Pan <pandy.gao@nxp.com>"); |
b6787b68 | 996 | MODULE_LICENSE("GPL"); |