2 * Cadence SPI controller driver (master mode only)
4 * Copyright (C) 2008 - 2014 Xilinx, Inc.
6 * based on Blackfin On-Chip SPI Driver (spi_bfin5xx.c)
8 * This program is free software; you can redistribute it and/or modify it under
9 * the terms of the GNU General Public License version 2 as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
14 #include <linux/clk.h>
15 #include <linux/delay.h>
16 #include <linux/interrupt.h>
18 #include <linux/module.h>
19 #include <linux/of_irq.h>
20 #include <linux/of_address.h>
21 #include <linux/platform_device.h>
22 #include <linux/spi/spi.h>
24 /* Name of this driver */
25 #define CDNS_SPI_NAME "cdns-spi"
27 /* Register offset definitions */
28 #define CDNS_SPI_CR_OFFSET 0x00 /* Configuration Register, RW */
29 #define CDNS_SPI_ISR_OFFSET 0x04 /* Interrupt Status Register, RO */
30 #define CDNS_SPI_IER_OFFSET 0x08 /* Interrupt Enable Register, WO */
31 #define CDNS_SPI_IDR_OFFSET 0x0c /* Interrupt Disable Register, WO */
32 #define CDNS_SPI_IMR_OFFSET 0x10 /* Interrupt Enabled Mask Register, RO */
33 #define CDNS_SPI_ER_OFFSET 0x14 /* Enable/Disable Register, RW */
34 #define CDNS_SPI_DR_OFFSET 0x18 /* Delay Register, RW */
35 #define CDNS_SPI_TXD_OFFSET 0x1C /* Data Transmit Register, WO */
36 #define CDNS_SPI_RXD_OFFSET 0x20 /* Data Receive Register, RO */
37 #define CDNS_SPI_SICR_OFFSET 0x24 /* Slave Idle Count Register, RW */
38 #define CDNS_SPI_THLD_OFFSET 0x28 /* Transmit FIFO Watermark Register,RW */
41 * SPI Configuration Register bit Masks
43 * This register contains various control bits that affect the operation
44 * of the SPI controller
46 #define CDNS_SPI_CR_MANSTRT_MASK 0x00010000 /* Manual TX Start */
47 #define CDNS_SPI_CR_CPHA_MASK 0x00000004 /* Clock Phase Control */
48 #define CDNS_SPI_CR_CPOL_MASK 0x00000002 /* Clock Polarity Control */
49 #define CDNS_SPI_CR_SSCTRL_MASK 0x00003C00 /* Slave Select Mask */
50 #define CDNS_SPI_CR_PERI_SEL_MASK 0x00000200 /* Peripheral Select Decode */
51 #define CDNS_SPI_CR_BAUD_DIV_MASK 0x00000038 /* Baud Rate Divisor Mask */
52 #define CDNS_SPI_CR_MSTREN_MASK 0x00000001 /* Master Enable Mask */
53 #define CDNS_SPI_CR_MANSTRTEN_MASK 0x00008000 /* Manual TX Enable Mask */
54 #define CDNS_SPI_CR_SSFORCE_MASK 0x00004000 /* Manual SS Enable Mask */
55 #define CDNS_SPI_CR_BAUD_DIV_4_MASK 0x00000008 /* Default Baud Div Mask */
56 #define CDNS_SPI_CR_DEFAULT_MASK (CDNS_SPI_CR_MSTREN_MASK | \
57 CDNS_SPI_CR_SSCTRL_MASK | \
58 CDNS_SPI_CR_SSFORCE_MASK | \
59 CDNS_SPI_CR_BAUD_DIV_4_MASK)
62 * SPI Configuration Register - Baud rate and slave select
64 * These are the values used in the calculation of baud rate divisor and
65 * setting the slave select.
68 #define CDNS_SPI_BAUD_DIV_MAX 7 /* Baud rate divisor maximum */
69 #define CDNS_SPI_BAUD_DIV_MIN 1 /* Baud rate divisor minimum */
70 #define CDNS_SPI_BAUD_DIV_SHIFT 3 /* Baud rate divisor shift in CR */
71 #define CDNS_SPI_SS_SHIFT 10 /* Slave Select field shift in CR */
72 #define CDNS_SPI_SS0 0x1 /* Slave Select zero */
75 * SPI Interrupt Registers bit Masks
77 * All the four interrupt registers (Status/Mask/Enable/Disable) have the same
80 #define CDNS_SPI_IXR_TXOW_MASK 0x00000004 /* SPI TX FIFO Overwater */
81 #define CDNS_SPI_IXR_MODF_MASK 0x00000002 /* SPI Mode Fault */
82 #define CDNS_SPI_IXR_RXNEMTY_MASK 0x00000010 /* SPI RX FIFO Not Empty */
83 #define CDNS_SPI_IXR_DEFAULT_MASK (CDNS_SPI_IXR_TXOW_MASK | \
84 CDNS_SPI_IXR_MODF_MASK)
85 #define CDNS_SPI_IXR_TXFULL_MASK 0x00000008 /* SPI TX Full */
86 #define CDNS_SPI_IXR_ALL_MASK 0x0000007F /* SPI all interrupts */
89 * SPI Enable Register bit Masks
91 * This register is used to enable or disable the SPI controller
93 #define CDNS_SPI_ER_ENABLE_MASK 0x00000001 /* SPI Enable Bit Mask */
94 #define CDNS_SPI_ER_DISABLE_MASK 0x0 /* SPI Disable Bit Mask */
96 /* SPI FIFO depth in bytes */
97 #define CDNS_SPI_FIFO_DEPTH 128
99 /* Default number of chip select lines */
100 #define CDNS_SPI_DEFAULT_NUM_CS 4
103 * struct cdns_spi - This definition defines spi driver instance
104 * @regs: Virtual address of the SPI controller registers
105 * @ref_clk: Pointer to the peripheral clock
106 * @pclk: Pointer to the APB clock
107 * @speed_hz: Current SPI bus clock speed in Hz
108 * @txbuf: Pointer to the TX buffer
109 * @rxbuf: Pointer to the RX buffer
110 * @tx_bytes: Number of bytes left to transfer
111 * @rx_bytes: Number of bytes requested
112 * @dev_busy: Device busy flag
113 * @is_decoded_cs: Flag for decoder property set or not
119 unsigned int clk_rate;
129 /* Macros for the SPI controller read/write */
130 static inline u32 cdns_spi_read(struct cdns_spi *xspi, u32 offset)
132 return readl_relaxed(xspi->regs + offset);
135 static inline void cdns_spi_write(struct cdns_spi *xspi, u32 offset, u32 val)
137 writel_relaxed(val, xspi->regs + offset);
141 * cdns_spi_init_hw - Initialize the hardware and configure the SPI controller
142 * @xspi: Pointer to the cdns_spi structure
144 * On reset the SPI controller is configured to be in master mode, baud rate
145 * divisor is set to 4, threshold value for TX FIFO not full interrupt is set
146 * to 1 and size of the word to be transferred as 8 bit.
147 * This function initializes the SPI controller to disable and clear all the
148 * interrupts, enable manual slave select and manual start, deselect all the
149 * chip select lines, and enable the SPI controller.
151 static void cdns_spi_init_hw(struct cdns_spi *xspi)
153 u32 ctrl_reg = CDNS_SPI_CR_DEFAULT_MASK;
155 if (xspi->is_decoded_cs)
156 ctrl_reg |= CDNS_SPI_CR_PERI_SEL_MASK;
158 cdns_spi_write(xspi, CDNS_SPI_ER_OFFSET,
159 CDNS_SPI_ER_DISABLE_MASK);
160 cdns_spi_write(xspi, CDNS_SPI_IDR_OFFSET,
161 CDNS_SPI_IXR_ALL_MASK);
163 /* Clear the RX FIFO */
164 while (cdns_spi_read(xspi, CDNS_SPI_ISR_OFFSET) &
165 CDNS_SPI_IXR_RXNEMTY_MASK)
166 cdns_spi_read(xspi, CDNS_SPI_RXD_OFFSET);
168 cdns_spi_write(xspi, CDNS_SPI_ISR_OFFSET,
169 CDNS_SPI_IXR_ALL_MASK);
170 cdns_spi_write(xspi, CDNS_SPI_CR_OFFSET, ctrl_reg);
171 cdns_spi_write(xspi, CDNS_SPI_ER_OFFSET,
172 CDNS_SPI_ER_ENABLE_MASK);
176 * cdns_spi_chipselect - Select or deselect the chip select line
177 * @spi: Pointer to the spi_device structure
178 * @is_on: Select(0) or deselect (1) the chip select line
180 static void cdns_spi_chipselect(struct spi_device *spi, bool is_high)
182 struct cdns_spi *xspi = spi_master_get_devdata(spi->master);
185 ctrl_reg = cdns_spi_read(xspi, CDNS_SPI_CR_OFFSET);
188 /* Deselect the slave */
189 ctrl_reg |= CDNS_SPI_CR_SSCTRL_MASK;
191 /* Select the slave */
192 ctrl_reg &= ~CDNS_SPI_CR_SSCTRL_MASK;
193 if (!(xspi->is_decoded_cs))
194 ctrl_reg |= ((~(CDNS_SPI_SS0 << spi->chip_select)) <<
196 CDNS_SPI_CR_SSCTRL_MASK;
198 ctrl_reg |= (spi->chip_select << CDNS_SPI_SS_SHIFT) &
199 CDNS_SPI_CR_SSCTRL_MASK;
202 cdns_spi_write(xspi, CDNS_SPI_CR_OFFSET, ctrl_reg);
206 * cdns_spi_config_clock_mode - Sets clock polarity and phase
207 * @spi: Pointer to the spi_device structure
209 * Sets the requested clock polarity and phase.
211 static void cdns_spi_config_clock_mode(struct spi_device *spi)
213 struct cdns_spi *xspi = spi_master_get_devdata(spi->master);
214 u32 ctrl_reg, new_ctrl_reg;
216 new_ctrl_reg = ctrl_reg = cdns_spi_read(xspi, CDNS_SPI_CR_OFFSET);
218 /* Set the SPI clock phase and clock polarity */
219 new_ctrl_reg &= ~(CDNS_SPI_CR_CPHA_MASK | CDNS_SPI_CR_CPOL_MASK);
220 if (spi->mode & SPI_CPHA)
221 new_ctrl_reg |= CDNS_SPI_CR_CPHA_MASK;
222 if (spi->mode & SPI_CPOL)
223 new_ctrl_reg |= CDNS_SPI_CR_CPOL_MASK;
225 if (new_ctrl_reg != ctrl_reg) {
227 * Just writing the CR register does not seem to apply the clock
228 * setting changes. This is problematic when changing the clock
229 * polarity as it will cause the SPI slave to see spurious clock
230 * transitions. To workaround the issue toggle the ER register.
232 cdns_spi_write(xspi, CDNS_SPI_ER_OFFSET,
233 CDNS_SPI_ER_DISABLE_MASK);
234 cdns_spi_write(xspi, CDNS_SPI_CR_OFFSET, new_ctrl_reg);
235 cdns_spi_write(xspi, CDNS_SPI_ER_OFFSET,
236 CDNS_SPI_ER_ENABLE_MASK);
241 * cdns_spi_config_clock_freq - Sets clock frequency
242 * @spi: Pointer to the spi_device structure
243 * @transfer: Pointer to the spi_transfer structure which provides
244 * information about next transfer setup parameters
246 * Sets the requested clock frequency.
247 * Note: If the requested frequency is not an exact match with what can be
248 * obtained using the prescalar value the driver sets the clock frequency which
249 * is lower than the requested frequency (maximum lower) for the transfer. If
250 * the requested frequency is higher or lower than that is supported by the SPI
251 * controller the driver will set the highest or lowest frequency supported by
254 static void cdns_spi_config_clock_freq(struct spi_device *spi,
255 struct spi_transfer *transfer)
257 struct cdns_spi *xspi = spi_master_get_devdata(spi->master);
258 u32 ctrl_reg, baud_rate_val;
259 unsigned long frequency;
261 frequency = xspi->clk_rate;
263 ctrl_reg = cdns_spi_read(xspi, CDNS_SPI_CR_OFFSET);
265 /* Set the clock frequency */
266 if (xspi->speed_hz != transfer->speed_hz) {
267 /* first valid value is 1 */
268 baud_rate_val = CDNS_SPI_BAUD_DIV_MIN;
269 while ((baud_rate_val < CDNS_SPI_BAUD_DIV_MAX) &&
270 (frequency / (2 << baud_rate_val)) > transfer->speed_hz)
273 ctrl_reg &= ~CDNS_SPI_CR_BAUD_DIV_MASK;
274 ctrl_reg |= baud_rate_val << CDNS_SPI_BAUD_DIV_SHIFT;
276 xspi->speed_hz = frequency / (2 << baud_rate_val);
278 cdns_spi_write(xspi, CDNS_SPI_CR_OFFSET, ctrl_reg);
282 * cdns_spi_setup_transfer - Configure SPI controller for specified transfer
283 * @spi: Pointer to the spi_device structure
284 * @transfer: Pointer to the spi_transfer structure which provides
285 * information about next transfer setup parameters
287 * Sets the operational mode of SPI controller for the next SPI transfer and
288 * sets the requested clock frequency.
292 static int cdns_spi_setup_transfer(struct spi_device *spi,
293 struct spi_transfer *transfer)
295 struct cdns_spi *xspi = spi_master_get_devdata(spi->master);
297 cdns_spi_config_clock_freq(spi, transfer);
299 dev_dbg(&spi->dev, "%s, mode %d, %u bits/w, %u clock speed\n",
300 __func__, spi->mode, spi->bits_per_word,
307 * cdns_spi_fill_tx_fifo - Fills the TX FIFO with as many bytes as possible
308 * @xspi: Pointer to the cdns_spi structure
310 static void cdns_spi_fill_tx_fifo(struct cdns_spi *xspi)
312 unsigned long trans_cnt = 0;
314 while ((trans_cnt < CDNS_SPI_FIFO_DEPTH) &&
315 (xspi->tx_bytes > 0)) {
317 cdns_spi_write(xspi, CDNS_SPI_TXD_OFFSET,
320 cdns_spi_write(xspi, CDNS_SPI_TXD_OFFSET, 0);
328 * cdns_spi_irq - Interrupt service routine of the SPI controller
330 * @dev_id: Pointer to the xspi structure
332 * This function handles TX empty and Mode Fault interrupts only.
333 * On TX empty interrupt this function reads the received data from RX FIFO and
334 * fills the TX FIFO if there is any data remaining to be transferred.
335 * On Mode Fault interrupt this function indicates that transfer is completed,
336 * the SPI subsystem will identify the error as the remaining bytes to be
337 * transferred is non-zero.
339 * Return: IRQ_HANDLED when handled; IRQ_NONE otherwise.
341 static irqreturn_t cdns_spi_irq(int irq, void *dev_id)
343 struct spi_master *master = dev_id;
344 struct cdns_spi *xspi = spi_master_get_devdata(master);
345 u32 intr_status, status;
348 intr_status = cdns_spi_read(xspi, CDNS_SPI_ISR_OFFSET);
349 cdns_spi_write(xspi, CDNS_SPI_ISR_OFFSET, intr_status);
351 if (intr_status & CDNS_SPI_IXR_MODF_MASK) {
352 /* Indicate that transfer is completed, the SPI subsystem will
353 * identify the error as the remaining bytes to be
354 * transferred is non-zero
356 cdns_spi_write(xspi, CDNS_SPI_IDR_OFFSET,
357 CDNS_SPI_IXR_DEFAULT_MASK);
358 spi_finalize_current_transfer(master);
359 status = IRQ_HANDLED;
360 } else if (intr_status & CDNS_SPI_IXR_TXOW_MASK) {
361 unsigned long trans_cnt;
363 trans_cnt = xspi->rx_bytes - xspi->tx_bytes;
365 /* Read out the data from the RX FIFO */
369 data = cdns_spi_read(xspi, CDNS_SPI_RXD_OFFSET);
371 *xspi->rxbuf++ = data;
377 if (xspi->tx_bytes) {
378 /* There is more data to send */
379 cdns_spi_fill_tx_fifo(xspi);
381 /* Transfer is completed */
382 cdns_spi_write(xspi, CDNS_SPI_IDR_OFFSET,
383 CDNS_SPI_IXR_DEFAULT_MASK);
384 spi_finalize_current_transfer(master);
386 status = IRQ_HANDLED;
391 static int cdns_prepare_message(struct spi_master *master,
392 struct spi_message *msg)
394 cdns_spi_config_clock_mode(msg->spi);
399 * cdns_transfer_one - Initiates the SPI transfer
400 * @master: Pointer to spi_master structure
401 * @spi: Pointer to the spi_device structure
402 * @transfer: Pointer to the spi_transfer structure which provides
403 * information about next transfer parameters
405 * This function fills the TX FIFO, starts the SPI transfer and
406 * returns a positive transfer count so that core will wait for completion.
408 * Return: Number of bytes transferred in the last transfer
410 static int cdns_transfer_one(struct spi_master *master,
411 struct spi_device *spi,
412 struct spi_transfer *transfer)
414 struct cdns_spi *xspi = spi_master_get_devdata(master);
416 xspi->txbuf = transfer->tx_buf;
417 xspi->rxbuf = transfer->rx_buf;
418 xspi->tx_bytes = transfer->len;
419 xspi->rx_bytes = transfer->len;
421 cdns_spi_setup_transfer(spi, transfer);
423 cdns_spi_fill_tx_fifo(xspi);
425 cdns_spi_write(xspi, CDNS_SPI_IER_OFFSET,
426 CDNS_SPI_IXR_DEFAULT_MASK);
427 return transfer->len;
431 * cdns_prepare_transfer_hardware - Prepares hardware for transfer.
432 * @master: Pointer to the spi_master structure which provides
433 * information about the controller.
435 * This function enables SPI master controller.
439 static int cdns_prepare_transfer_hardware(struct spi_master *master)
441 struct cdns_spi *xspi = spi_master_get_devdata(master);
443 cdns_spi_write(xspi, CDNS_SPI_ER_OFFSET,
444 CDNS_SPI_ER_ENABLE_MASK);
450 * cdns_unprepare_transfer_hardware - Relaxes hardware after transfer
451 * @master: Pointer to the spi_master structure which provides
452 * information about the controller.
454 * This function disables the SPI master controller.
458 static int cdns_unprepare_transfer_hardware(struct spi_master *master)
460 struct cdns_spi *xspi = spi_master_get_devdata(master);
462 cdns_spi_write(xspi, CDNS_SPI_ER_OFFSET,
463 CDNS_SPI_ER_DISABLE_MASK);
469 * cdns_spi_probe - Probe method for the SPI driver
470 * @pdev: Pointer to the platform_device structure
472 * This function initializes the driver data structures and the hardware.
474 * Return: 0 on success and error value on error
476 static int cdns_spi_probe(struct platform_device *pdev)
479 struct spi_master *master;
480 struct cdns_spi *xspi;
481 struct resource *res;
484 master = spi_alloc_master(&pdev->dev, sizeof(*xspi));
488 xspi = spi_master_get_devdata(master);
489 master->dev.of_node = pdev->dev.of_node;
490 platform_set_drvdata(pdev, master);
492 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
493 xspi->regs = devm_ioremap_resource(&pdev->dev, res);
494 if (IS_ERR(xspi->regs)) {
495 ret = PTR_ERR(xspi->regs);
499 xspi->pclk = devm_clk_get(&pdev->dev, "pclk");
500 if (IS_ERR(xspi->pclk)) {
501 dev_err(&pdev->dev, "pclk clock not found.\n");
502 ret = PTR_ERR(xspi->pclk);
506 xspi->ref_clk = devm_clk_get(&pdev->dev, "ref_clk");
507 if (IS_ERR(xspi->ref_clk)) {
508 dev_err(&pdev->dev, "ref_clk clock not found.\n");
509 ret = PTR_ERR(xspi->ref_clk);
513 ret = clk_prepare_enable(xspi->pclk);
515 dev_err(&pdev->dev, "Unable to enable APB clock.\n");
519 ret = clk_prepare_enable(xspi->ref_clk);
521 dev_err(&pdev->dev, "Unable to enable device clock.\n");
525 ret = of_property_read_u32(pdev->dev.of_node, "num-cs", &num_cs);
527 master->num_chipselect = CDNS_SPI_DEFAULT_NUM_CS;
529 master->num_chipselect = num_cs;
531 ret = of_property_read_u32(pdev->dev.of_node, "is-decoded-cs",
532 &xspi->is_decoded_cs);
534 xspi->is_decoded_cs = 0;
536 /* SPI controller initializations */
537 cdns_spi_init_hw(xspi);
539 irq = platform_get_irq(pdev, 0);
542 dev_err(&pdev->dev, "irq number is invalid\n");
546 ret = devm_request_irq(&pdev->dev, irq, cdns_spi_irq,
547 0, pdev->name, master);
550 dev_err(&pdev->dev, "request_irq failed\n");
554 master->prepare_transfer_hardware = cdns_prepare_transfer_hardware;
555 master->prepare_message = cdns_prepare_message;
556 master->transfer_one = cdns_transfer_one;
557 master->unprepare_transfer_hardware = cdns_unprepare_transfer_hardware;
558 master->set_cs = cdns_spi_chipselect;
559 master->mode_bits = SPI_CPOL | SPI_CPHA;
561 xspi->clk_rate = clk_get_rate(xspi->ref_clk);
562 /* Set to default valid value */
563 master->max_speed_hz = xspi->clk_rate / 4;
564 xspi->speed_hz = master->max_speed_hz;
566 master->bits_per_word_mask = SPI_BPW_MASK(8);
568 ret = spi_register_master(master);
570 dev_err(&pdev->dev, "spi_register_master failed\n");
577 clk_disable_unprepare(xspi->ref_clk);
579 clk_disable_unprepare(xspi->pclk);
581 spi_master_put(master);
586 * cdns_spi_remove - Remove method for the SPI driver
587 * @pdev: Pointer to the platform_device structure
589 * This function is called if a device is physically removed from the system or
590 * if the driver module is being unloaded. It frees all resources allocated to
593 * Return: 0 on success and error value on error
595 static int cdns_spi_remove(struct platform_device *pdev)
597 struct spi_master *master = platform_get_drvdata(pdev);
598 struct cdns_spi *xspi = spi_master_get_devdata(master);
600 cdns_spi_write(xspi, CDNS_SPI_ER_OFFSET,
601 CDNS_SPI_ER_DISABLE_MASK);
603 clk_disable_unprepare(xspi->ref_clk);
604 clk_disable_unprepare(xspi->pclk);
606 spi_unregister_master(master);
612 * cdns_spi_suspend - Suspend method for the SPI driver
613 * @dev: Address of the platform_device structure
615 * This function disables the SPI controller and
616 * changes the driver state to "suspend"
620 static int __maybe_unused cdns_spi_suspend(struct device *dev)
622 struct platform_device *pdev = container_of(dev,
623 struct platform_device, dev);
624 struct spi_master *master = platform_get_drvdata(pdev);
625 struct cdns_spi *xspi = spi_master_get_devdata(master);
627 spi_master_suspend(master);
629 clk_disable_unprepare(xspi->ref_clk);
631 clk_disable_unprepare(xspi->pclk);
637 * cdns_spi_resume - Resume method for the SPI driver
638 * @dev: Address of the platform_device structure
640 * This function changes the driver state to "ready"
642 * Return: 0 on success and error value on error
644 static int __maybe_unused cdns_spi_resume(struct device *dev)
646 struct platform_device *pdev = container_of(dev,
647 struct platform_device, dev);
648 struct spi_master *master = platform_get_drvdata(pdev);
649 struct cdns_spi *xspi = spi_master_get_devdata(master);
652 ret = clk_prepare_enable(xspi->pclk);
654 dev_err(dev, "Cannot enable APB clock.\n");
658 ret = clk_prepare_enable(xspi->ref_clk);
660 dev_err(dev, "Cannot enable device clock.\n");
661 clk_disable(xspi->pclk);
664 spi_master_resume(master);
669 static SIMPLE_DEV_PM_OPS(cdns_spi_dev_pm_ops, cdns_spi_suspend,
672 static const struct of_device_id cdns_spi_of_match[] = {
673 { .compatible = "xlnx,zynq-spi-r1p6" },
674 { .compatible = "cdns,spi-r1p6" },
675 { /* end of table */ }
677 MODULE_DEVICE_TABLE(of, cdns_spi_of_match);
679 /* cdns_spi_driver - This structure defines the SPI subsystem platform driver */
680 static struct platform_driver cdns_spi_driver = {
681 .probe = cdns_spi_probe,
682 .remove = cdns_spi_remove,
684 .name = CDNS_SPI_NAME,
685 .of_match_table = cdns_spi_of_match,
686 .pm = &cdns_spi_dev_pm_ops,
690 module_platform_driver(cdns_spi_driver);
692 MODULE_AUTHOR("Xilinx, Inc.");
693 MODULE_DESCRIPTION("Cadence SPI driver");
694 MODULE_LICENSE("GPL");