2 * Driver for AT91/AT32 LCD Controller
4 * Copyright (C) 2007 Atmel Corporation
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file COPYING in the main directory of this archive for
11 #include <linux/kernel.h>
12 #include <linux/platform_device.h>
13 #include <linux/dma-mapping.h>
14 #include <linux/interrupt.h>
15 #include <linux/clk.h>
17 #include <linux/init.h>
18 #include <linux/delay.h>
19 #include <linux/backlight.h>
20 #include <linux/gfp.h>
21 #include <linux/module.h>
22 #include <linux/platform_data/atmel.h>
24 #include <linux/of_device.h>
25 #include <linux/of_gpio.h>
26 #include <video/of_display_timing.h>
27 #include <linux/regulator/consumer.h>
28 #include <video/videomode.h>
32 #include <video/atmel_lcdc.h>
34 struct atmel_lcdfb_config {
35 bool have_alt_pixclock;
37 bool have_intensity_bit;
40 /* LCD Controller info data structure, stored in device platform_data */
41 struct atmel_lcdfb_info {
46 struct work_struct task;
48 unsigned int smem_len;
49 struct platform_device *pdev;
53 struct backlight_device *backlight;
57 u32 pseudo_palette[16];
58 bool have_intensity_bit;
60 struct atmel_lcdfb_pdata pdata;
62 struct atmel_lcdfb_config *config;
63 struct regulator *reg_lcd;
66 struct atmel_lcdfb_power_ctrl_gpio {
70 struct list_head list;
73 #define lcdc_readl(sinfo, reg) __raw_readl((sinfo)->mmio+(reg))
74 #define lcdc_writel(sinfo, reg, val) __raw_writel((val), (sinfo)->mmio+(reg))
76 /* configurable parameters */
77 #define ATMEL_LCDC_CVAL_DEFAULT 0xc8
78 #define ATMEL_LCDC_DMA_BURST_LEN 8 /* words */
79 #define ATMEL_LCDC_FIFO_SIZE 512 /* words */
81 static struct atmel_lcdfb_config at91sam9261_config = {
83 .have_intensity_bit = true,
86 static struct atmel_lcdfb_config at91sam9263_config = {
87 .have_intensity_bit = true,
90 static struct atmel_lcdfb_config at91sam9g10_config = {
94 static struct atmel_lcdfb_config at91sam9g45_config = {
95 .have_alt_pixclock = true,
98 static struct atmel_lcdfb_config at91sam9g45es_config = {
101 static struct atmel_lcdfb_config at91sam9rl_config = {
102 .have_intensity_bit = true,
105 static struct atmel_lcdfb_config at32ap_config = {
109 static const struct platform_device_id atmel_lcdfb_devtypes[] = {
111 .name = "at91sam9261-lcdfb",
112 .driver_data = (unsigned long)&at91sam9261_config,
114 .name = "at91sam9263-lcdfb",
115 .driver_data = (unsigned long)&at91sam9263_config,
117 .name = "at91sam9g10-lcdfb",
118 .driver_data = (unsigned long)&at91sam9g10_config,
120 .name = "at91sam9g45-lcdfb",
121 .driver_data = (unsigned long)&at91sam9g45_config,
123 .name = "at91sam9g45es-lcdfb",
124 .driver_data = (unsigned long)&at91sam9g45es_config,
126 .name = "at91sam9rl-lcdfb",
127 .driver_data = (unsigned long)&at91sam9rl_config,
129 .name = "at32ap-lcdfb",
130 .driver_data = (unsigned long)&at32ap_config,
135 MODULE_DEVICE_TABLE(platform, atmel_lcdfb_devtypes);
137 static struct atmel_lcdfb_config *
138 atmel_lcdfb_get_config(struct platform_device *pdev)
142 data = platform_get_device_id(pdev)->driver_data;
144 return (struct atmel_lcdfb_config *)data;
147 #if defined(CONFIG_ARCH_AT91)
148 #define ATMEL_LCDFB_FBINFO_DEFAULT (FBINFO_DEFAULT \
149 | FBINFO_PARTIAL_PAN_OK \
150 | FBINFO_HWACCEL_YPAN)
152 static inline void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo,
153 struct fb_var_screeninfo *var,
154 struct fb_info *info)
158 #elif defined(CONFIG_AVR32)
159 #define ATMEL_LCDFB_FBINFO_DEFAULT (FBINFO_DEFAULT \
160 | FBINFO_PARTIAL_PAN_OK \
161 | FBINFO_HWACCEL_XPAN \
162 | FBINFO_HWACCEL_YPAN)
164 static void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo,
165 struct fb_var_screeninfo *var,
166 struct fb_info *info)
171 pixeloff = (var->xoffset * info->var.bits_per_pixel) & 0x1f;
173 dma2dcfg = (info->var.xres_virtual - info->var.xres)
174 * info->var.bits_per_pixel / 8;
175 dma2dcfg |= pixeloff << ATMEL_LCDC_PIXELOFF_OFFSET;
176 lcdc_writel(sinfo, ATMEL_LCDC_DMA2DCFG, dma2dcfg);
178 /* Update configuration */
179 lcdc_writel(sinfo, ATMEL_LCDC_DMACON,
180 lcdc_readl(sinfo, ATMEL_LCDC_DMACON)
181 | ATMEL_LCDC_DMAUPDT);
185 static u32 contrast_ctr = ATMEL_LCDC_PS_DIV8
186 | ATMEL_LCDC_POL_POSITIVE
187 | ATMEL_LCDC_ENA_PWMENABLE;
189 #ifdef CONFIG_BACKLIGHT_ATMEL_LCDC
191 /* some bl->props field just changed */
192 static int atmel_bl_update_status(struct backlight_device *bl)
194 struct atmel_lcdfb_info *sinfo = bl_get_data(bl);
195 int power = sinfo->bl_power;
196 int brightness = bl->props.brightness;
198 /* REVISIT there may be a meaningful difference between
199 * fb_blank and power ... there seem to be some cases
200 * this doesn't handle correctly.
202 if (bl->props.fb_blank != sinfo->bl_power)
203 power = bl->props.fb_blank;
204 else if (bl->props.power != sinfo->bl_power)
205 power = bl->props.power;
207 if (brightness < 0 && power == FB_BLANK_UNBLANK)
208 brightness = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL);
209 else if (power != FB_BLANK_UNBLANK)
212 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_VAL, brightness);
213 if (contrast_ctr & ATMEL_LCDC_POL_POSITIVE)
214 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR,
215 brightness ? contrast_ctr : 0);
217 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, contrast_ctr);
219 bl->props.fb_blank = bl->props.power = sinfo->bl_power = power;
224 static int atmel_bl_get_brightness(struct backlight_device *bl)
226 struct atmel_lcdfb_info *sinfo = bl_get_data(bl);
228 return lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL);
231 static const struct backlight_ops atmel_lcdc_bl_ops = {
232 .update_status = atmel_bl_update_status,
233 .get_brightness = atmel_bl_get_brightness,
236 static void init_backlight(struct atmel_lcdfb_info *sinfo)
238 struct backlight_properties props;
239 struct backlight_device *bl;
241 sinfo->bl_power = FB_BLANK_UNBLANK;
243 if (sinfo->backlight)
246 memset(&props, 0, sizeof(struct backlight_properties));
247 props.type = BACKLIGHT_RAW;
248 props.max_brightness = 0xff;
249 bl = backlight_device_register("backlight", &sinfo->pdev->dev, sinfo,
250 &atmel_lcdc_bl_ops, &props);
252 dev_err(&sinfo->pdev->dev, "error %ld on backlight register\n",
256 sinfo->backlight = bl;
258 bl->props.power = FB_BLANK_UNBLANK;
259 bl->props.fb_blank = FB_BLANK_UNBLANK;
260 bl->props.brightness = atmel_bl_get_brightness(bl);
263 static void exit_backlight(struct atmel_lcdfb_info *sinfo)
265 if (!sinfo->backlight)
268 if (sinfo->backlight->ops) {
269 sinfo->backlight->props.power = FB_BLANK_POWERDOWN;
270 sinfo->backlight->ops->update_status(sinfo->backlight);
272 backlight_device_unregister(sinfo->backlight);
277 static void init_backlight(struct atmel_lcdfb_info *sinfo)
279 dev_warn(&sinfo->pdev->dev, "backlight control is not available\n");
282 static void exit_backlight(struct atmel_lcdfb_info *sinfo)
288 static void init_contrast(struct atmel_lcdfb_info *sinfo)
290 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
292 /* contrast pwm can be 'inverted' */
293 if (pdata->lcdcon_pol_negative)
294 contrast_ctr &= ~(ATMEL_LCDC_POL_POSITIVE);
296 /* have some default contrast/backlight settings */
297 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, contrast_ctr);
298 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_VAL, ATMEL_LCDC_CVAL_DEFAULT);
300 if (pdata->lcdcon_is_backlight)
301 init_backlight(sinfo);
304 static inline void atmel_lcdfb_power_control(struct atmel_lcdfb_info *sinfo, int on)
307 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
309 if (pdata->atmel_lcdfb_power_control)
310 pdata->atmel_lcdfb_power_control(pdata, on);
311 else if (sinfo->reg_lcd) {
313 ret = regulator_enable(sinfo->reg_lcd);
315 dev_err(&sinfo->pdev->dev,
316 "lcd regulator enable failed: %d\n", ret);
318 ret = regulator_disable(sinfo->reg_lcd);
320 dev_err(&sinfo->pdev->dev,
321 "lcd regulator disable failed: %d\n", ret);
326 static struct fb_fix_screeninfo atmel_lcdfb_fix __initdata = {
327 .type = FB_TYPE_PACKED_PIXELS,
328 .visual = FB_VISUAL_TRUECOLOR,
332 .accel = FB_ACCEL_NONE,
335 static unsigned long compute_hozval(struct atmel_lcdfb_info *sinfo,
338 unsigned long lcdcon2;
341 if (!sinfo->config->have_hozval)
344 lcdcon2 = lcdc_readl(sinfo, ATMEL_LCDC_LCDCON2);
346 if ((lcdcon2 & ATMEL_LCDC_DISTYPE) != ATMEL_LCDC_DISTYPE_TFT) {
348 if ((lcdcon2 & ATMEL_LCDC_DISTYPE) == ATMEL_LCDC_DISTYPE_STNCOLOR) {
351 if ( (lcdcon2 & ATMEL_LCDC_IFWIDTH) == ATMEL_LCDC_IFWIDTH_4
352 || ( (lcdcon2 & ATMEL_LCDC_IFWIDTH) == ATMEL_LCDC_IFWIDTH_8
353 && (lcdcon2 & ATMEL_LCDC_SCANMOD) == ATMEL_LCDC_SCANMOD_DUAL ))
354 value = DIV_ROUND_UP(value, 4);
356 value = DIV_ROUND_UP(value, 8);
362 static void atmel_lcdfb_stop_nowait(struct atmel_lcdfb_info *sinfo)
364 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
366 /* Turn off the LCD controller and the DMA controller */
367 lcdc_writel(sinfo, ATMEL_LCDC_PWRCON,
368 pdata->guard_time << ATMEL_LCDC_GUARDT_OFFSET);
370 /* Wait for the LCDC core to become idle */
371 while (lcdc_readl(sinfo, ATMEL_LCDC_PWRCON) & ATMEL_LCDC_BUSY)
374 lcdc_writel(sinfo, ATMEL_LCDC_DMACON, 0);
377 static void atmel_lcdfb_stop(struct atmel_lcdfb_info *sinfo)
379 atmel_lcdfb_stop_nowait(sinfo);
381 /* Wait for DMA engine to become idle... */
382 while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY)
386 static void atmel_lcdfb_start(struct atmel_lcdfb_info *sinfo)
388 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
390 lcdc_writel(sinfo, ATMEL_LCDC_DMACON, pdata->default_dmacon);
391 lcdc_writel(sinfo, ATMEL_LCDC_PWRCON,
392 (pdata->guard_time << ATMEL_LCDC_GUARDT_OFFSET)
396 static void atmel_lcdfb_update_dma(struct fb_info *info,
397 struct fb_var_screeninfo *var)
399 struct atmel_lcdfb_info *sinfo = info->par;
400 struct fb_fix_screeninfo *fix = &info->fix;
401 unsigned long dma_addr;
403 dma_addr = (fix->smem_start + var->yoffset * fix->line_length
404 + var->xoffset * info->var.bits_per_pixel / 8);
408 /* Set framebuffer DMA base address and pixel offset */
409 lcdc_writel(sinfo, ATMEL_LCDC_DMABADDR1, dma_addr);
411 atmel_lcdfb_update_dma2d(sinfo, var, info);
414 static inline void atmel_lcdfb_free_video_memory(struct atmel_lcdfb_info *sinfo)
416 struct fb_info *info = sinfo->info;
418 dma_free_writecombine(info->device, info->fix.smem_len,
419 info->screen_base, info->fix.smem_start);
423 * atmel_lcdfb_alloc_video_memory - Allocate framebuffer memory
424 * @sinfo: the frame buffer to allocate memory for
426 * This function is called only from the atmel_lcdfb_probe()
427 * so no locking by fb_info->mm_lock around smem_len setting is needed.
429 static int atmel_lcdfb_alloc_video_memory(struct atmel_lcdfb_info *sinfo)
431 struct fb_info *info = sinfo->info;
432 struct fb_var_screeninfo *var = &info->var;
433 unsigned int smem_len;
435 smem_len = (var->xres_virtual * var->yres_virtual
436 * ((var->bits_per_pixel + 7) / 8));
437 info->fix.smem_len = max(smem_len, sinfo->smem_len);
439 info->screen_base = dma_alloc_writecombine(info->device, info->fix.smem_len,
440 (dma_addr_t *)&info->fix.smem_start, GFP_KERNEL);
442 if (!info->screen_base) {
446 memset(info->screen_base, 0, info->fix.smem_len);
451 static const struct fb_videomode *atmel_lcdfb_choose_mode(struct fb_var_screeninfo *var,
452 struct fb_info *info)
454 struct fb_videomode varfbmode;
455 const struct fb_videomode *fbmode = NULL;
457 fb_var_to_videomode(&varfbmode, var);
458 fbmode = fb_find_nearest_mode(&varfbmode, &info->modelist);
460 fb_videomode_to_var(var, fbmode);
466 * atmel_lcdfb_check_var - Validates a var passed in.
467 * @var: frame buffer variable screen structure
468 * @info: frame buffer structure that represents a single frame buffer
470 * Checks to see if the hardware supports the state requested by
471 * var passed in. This function does not alter the hardware
472 * state!!! This means the data stored in struct fb_info and
473 * struct atmel_lcdfb_info do not change. This includes the var
474 * inside of struct fb_info. Do NOT change these. This function
475 * can be called on its own if we intent to only test a mode and
476 * not actually set it. The stuff in modedb.c is a example of
477 * this. If the var passed in is slightly off by what the
478 * hardware can support then we alter the var PASSED in to what
479 * we can do. If the hardware doesn't support mode change a
480 * -EINVAL will be returned by the upper layers. You don't need
481 * to implement this function then. If you hardware doesn't
482 * support changing the resolution then this function is not
483 * needed. In this case the driver would just provide a var that
484 * represents the static state the screen is in.
486 * Returns negative errno on error, or zero on success.
488 static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var,
489 struct fb_info *info)
491 struct device *dev = info->device;
492 struct atmel_lcdfb_info *sinfo = info->par;
493 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
494 unsigned long clk_value_khz;
496 clk_value_khz = clk_get_rate(sinfo->lcdc_clk) / 1000;
498 dev_dbg(dev, "%s:\n", __func__);
500 if (!(var->pixclock && var->bits_per_pixel)) {
501 /* choose a suitable mode if possible */
502 if (!atmel_lcdfb_choose_mode(var, info)) {
503 dev_err(dev, "needed value not specified\n");
508 dev_dbg(dev, " resolution: %ux%u\n", var->xres, var->yres);
509 dev_dbg(dev, " pixclk: %lu KHz\n", PICOS2KHZ(var->pixclock));
510 dev_dbg(dev, " bpp: %u\n", var->bits_per_pixel);
511 dev_dbg(dev, " clk: %lu KHz\n", clk_value_khz);
513 if (PICOS2KHZ(var->pixclock) > clk_value_khz) {
514 dev_err(dev, "%lu KHz pixel clock is too fast\n", PICOS2KHZ(var->pixclock));
518 /* Do not allow to have real resoulution larger than virtual */
519 if (var->xres > var->xres_virtual)
520 var->xres_virtual = var->xres;
522 if (var->yres > var->yres_virtual)
523 var->yres_virtual = var->yres;
525 /* Force same alignment for each line */
526 var->xres = (var->xres + 3) & ~3UL;
527 var->xres_virtual = (var->xres_virtual + 3) & ~3UL;
529 var->red.msb_right = var->green.msb_right = var->blue.msb_right = 0;
530 var->transp.msb_right = 0;
531 var->transp.offset = var->transp.length = 0;
532 var->xoffset = var->yoffset = 0;
534 if (info->fix.smem_len) {
535 unsigned int smem_len = (var->xres_virtual * var->yres_virtual
536 * ((var->bits_per_pixel + 7) / 8));
537 if (smem_len > info->fix.smem_len) {
538 dev_err(dev, "Frame buffer is too small (%u) for screen size (need at least %u)\n",
539 info->fix.smem_len, smem_len);
544 /* Saturate vertical and horizontal timings at maximum values */
545 var->vsync_len = min_t(u32, var->vsync_len,
546 (ATMEL_LCDC_VPW >> ATMEL_LCDC_VPW_OFFSET) + 1);
547 var->upper_margin = min_t(u32, var->upper_margin,
548 ATMEL_LCDC_VBP >> ATMEL_LCDC_VBP_OFFSET);
549 var->lower_margin = min_t(u32, var->lower_margin,
551 var->right_margin = min_t(u32, var->right_margin,
552 (ATMEL_LCDC_HFP >> ATMEL_LCDC_HFP_OFFSET) + 1);
553 var->hsync_len = min_t(u32, var->hsync_len,
554 (ATMEL_LCDC_HPW >> ATMEL_LCDC_HPW_OFFSET) + 1);
555 var->left_margin = min_t(u32, var->left_margin,
558 /* Some parameters can't be zero */
559 var->vsync_len = max_t(u32, var->vsync_len, 1);
560 var->right_margin = max_t(u32, var->right_margin, 1);
561 var->hsync_len = max_t(u32, var->hsync_len, 1);
562 var->left_margin = max_t(u32, var->left_margin, 1);
564 switch (var->bits_per_pixel) {
569 var->red.offset = var->green.offset = var->blue.offset = 0;
570 var->red.length = var->green.length = var->blue.length
571 = var->bits_per_pixel;
574 /* Older SOCs use IBGR:555 rather than BGR:565. */
575 if (sinfo->config->have_intensity_bit)
576 var->green.length = 5;
578 var->green.length = 6;
580 if (pdata->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) {
582 var->red.offset = var->green.length + 5;
583 var->blue.offset = 0;
587 var->blue.offset = var->green.length + 5;
589 var->green.offset = 5;
590 var->red.length = var->blue.length = 5;
593 var->transp.offset = 24;
594 var->transp.length = 8;
597 if (pdata->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) {
599 var->red.offset = 16;
600 var->blue.offset = 0;
604 var->blue.offset = 16;
606 var->green.offset = 8;
607 var->red.length = var->green.length = var->blue.length = 8;
610 dev_err(dev, "color depth %d not supported\n",
611 var->bits_per_pixel);
621 static void atmel_lcdfb_reset(struct atmel_lcdfb_info *sinfo)
625 atmel_lcdfb_stop(sinfo);
626 atmel_lcdfb_start(sinfo);
630 * atmel_lcdfb_set_par - Alters the hardware state.
631 * @info: frame buffer structure that represents a single frame buffer
633 * Using the fb_var_screeninfo in fb_info we set the resolution
634 * of the this particular framebuffer. This function alters the
635 * par AND the fb_fix_screeninfo stored in fb_info. It doesn't
636 * not alter var in fb_info since we are using that data. This
637 * means we depend on the data in var inside fb_info to be
638 * supported by the hardware. atmel_lcdfb_check_var is always called
639 * before atmel_lcdfb_set_par to ensure this. Again if you can't
640 * change the resolution you don't need this function.
643 static int atmel_lcdfb_set_par(struct fb_info *info)
645 struct atmel_lcdfb_info *sinfo = info->par;
646 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
647 unsigned long hozval_linesz;
649 unsigned long clk_value_khz;
650 unsigned long bits_per_line;
651 unsigned long pix_factor = 2;
655 dev_dbg(info->device, "%s:\n", __func__);
656 dev_dbg(info->device, " * resolution: %ux%u (%ux%u virtual)\n",
657 info->var.xres, info->var.yres,
658 info->var.xres_virtual, info->var.yres_virtual);
660 atmel_lcdfb_stop_nowait(sinfo);
662 if (info->var.bits_per_pixel == 1)
663 info->fix.visual = FB_VISUAL_MONO01;
664 else if (info->var.bits_per_pixel <= 8)
665 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
667 info->fix.visual = FB_VISUAL_TRUECOLOR;
669 bits_per_line = info->var.xres_virtual * info->var.bits_per_pixel;
670 info->fix.line_length = DIV_ROUND_UP(bits_per_line, 8);
672 /* Re-initialize the DMA engine... */
673 dev_dbg(info->device, " * update DMA engine\n");
674 atmel_lcdfb_update_dma(info, &info->var);
676 /* ...set frame size and burst length = 8 words (?) */
677 value = (info->var.yres * info->var.xres * info->var.bits_per_pixel) / 32;
678 value |= ((ATMEL_LCDC_DMA_BURST_LEN - 1) << ATMEL_LCDC_BLENGTH_OFFSET);
679 lcdc_writel(sinfo, ATMEL_LCDC_DMAFRMCFG, value);
681 /* Now, the LCDC core... */
683 /* Set pixel clock */
684 if (sinfo->config->have_alt_pixclock)
687 clk_value_khz = clk_get_rate(sinfo->lcdc_clk) / 1000;
689 value = DIV_ROUND_UP(clk_value_khz, PICOS2KHZ(info->var.pixclock));
691 if (value < pix_factor) {
692 dev_notice(info->device, "Bypassing pixel clock divider\n");
693 lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1, ATMEL_LCDC_BYPASS);
695 value = (value / pix_factor) - 1;
696 dev_dbg(info->device, " * programming CLKVAL = 0x%08lx\n",
698 lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1,
699 value << ATMEL_LCDC_CLKVAL_OFFSET);
701 KHZ2PICOS(clk_value_khz / (pix_factor * (value + 1)));
702 dev_dbg(info->device, " updated pixclk: %lu KHz\n",
703 PICOS2KHZ(info->var.pixclock));
707 /* Initialize control register 2 */
708 value = pdata->default_lcdcon2;
710 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
711 value |= ATMEL_LCDC_INVLINE_INVERTED;
712 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
713 value |= ATMEL_LCDC_INVFRAME_INVERTED;
715 switch (info->var.bits_per_pixel) {
716 case 1: value |= ATMEL_LCDC_PIXELSIZE_1; break;
717 case 2: value |= ATMEL_LCDC_PIXELSIZE_2; break;
718 case 4: value |= ATMEL_LCDC_PIXELSIZE_4; break;
719 case 8: value |= ATMEL_LCDC_PIXELSIZE_8; break;
720 case 15: /* fall through */
721 case 16: value |= ATMEL_LCDC_PIXELSIZE_16; break;
722 case 24: value |= ATMEL_LCDC_PIXELSIZE_24; break;
723 case 32: value |= ATMEL_LCDC_PIXELSIZE_32; break;
724 default: BUG(); break;
726 dev_dbg(info->device, " * LCDCON2 = %08lx\n", value);
727 lcdc_writel(sinfo, ATMEL_LCDC_LCDCON2, value);
729 /* Vertical timing */
730 value = (info->var.vsync_len - 1) << ATMEL_LCDC_VPW_OFFSET;
731 value |= info->var.upper_margin << ATMEL_LCDC_VBP_OFFSET;
732 value |= info->var.lower_margin;
733 dev_dbg(info->device, " * LCDTIM1 = %08lx\n", value);
734 lcdc_writel(sinfo, ATMEL_LCDC_TIM1, value);
736 /* Horizontal timing */
737 value = (info->var.right_margin - 1) << ATMEL_LCDC_HFP_OFFSET;
738 value |= (info->var.hsync_len - 1) << ATMEL_LCDC_HPW_OFFSET;
739 value |= (info->var.left_margin - 1);
740 dev_dbg(info->device, " * LCDTIM2 = %08lx\n", value);
741 lcdc_writel(sinfo, ATMEL_LCDC_TIM2, value);
743 /* Horizontal value (aka line size) */
744 hozval_linesz = compute_hozval(sinfo, info->var.xres);
747 value = (hozval_linesz - 1) << ATMEL_LCDC_HOZVAL_OFFSET;
748 value |= info->var.yres - 1;
749 dev_dbg(info->device, " * LCDFRMCFG = %08lx\n", value);
750 lcdc_writel(sinfo, ATMEL_LCDC_LCDFRMCFG, value);
752 /* FIFO Threshold: Use formula from data sheet */
753 value = ATMEL_LCDC_FIFO_SIZE - (2 * ATMEL_LCDC_DMA_BURST_LEN + 3);
754 lcdc_writel(sinfo, ATMEL_LCDC_FIFO, value);
756 /* Toggle LCD_MODE every frame */
757 lcdc_writel(sinfo, ATMEL_LCDC_MVAL, 0);
759 /* Disable all interrupts */
760 lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL);
761 /* Enable FIFO & DMA errors */
762 lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI | ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI);
764 /* ...wait for DMA engine to become idle... */
765 while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY)
768 atmel_lcdfb_start(sinfo);
770 dev_dbg(info->device, " * DONE\n");
775 static inline unsigned int chan_to_field(unsigned int chan, const struct fb_bitfield *bf)
778 chan >>= 16 - bf->length;
779 return chan << bf->offset;
783 * atmel_lcdfb_setcolreg - Optional function. Sets a color register.
784 * @regno: Which register in the CLUT we are programming
785 * @red: The red value which can be up to 16 bits wide
786 * @green: The green value which can be up to 16 bits wide
787 * @blue: The blue value which can be up to 16 bits wide.
788 * @transp: If supported the alpha value which can be up to 16 bits wide.
789 * @info: frame buffer info structure
791 * Set a single color register. The values supplied have a 16 bit
792 * magnitude which needs to be scaled in this function for the hardware.
793 * Things to take into consideration are how many color registers, if
794 * any, are supported with the current color visual. With truecolor mode
795 * no color palettes are supported. Here a pseudo palette is created
796 * which we store the value in pseudo_palette in struct fb_info. For
797 * pseudocolor mode we have a limited color palette. To deal with this
798 * we can program what color is displayed for a particular pixel value.
799 * DirectColor is similar in that we can program each color field. If
800 * we have a static colormap we don't need to implement this function.
802 * Returns negative errno on error, or zero on success. In an
803 * ideal world, this would have been the case, but as it turns
804 * out, the other drivers return 1 on failure, so that's what
807 static int atmel_lcdfb_setcolreg(unsigned int regno, unsigned int red,
808 unsigned int green, unsigned int blue,
809 unsigned int transp, struct fb_info *info)
811 struct atmel_lcdfb_info *sinfo = info->par;
812 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
817 if (info->var.grayscale)
818 red = green = blue = (19595 * red + 38470 * green
819 + 7471 * blue) >> 16;
821 switch (info->fix.visual) {
822 case FB_VISUAL_TRUECOLOR:
824 pal = info->pseudo_palette;
826 val = chan_to_field(red, &info->var.red);
827 val |= chan_to_field(green, &info->var.green);
828 val |= chan_to_field(blue, &info->var.blue);
835 case FB_VISUAL_PSEUDOCOLOR:
837 if (sinfo->config->have_intensity_bit) {
838 /* old style I+BGR:555 */
839 val = ((red >> 11) & 0x001f);
840 val |= ((green >> 6) & 0x03e0);
841 val |= ((blue >> 1) & 0x7c00);
844 * TODO: intensity bit. Maybe something like
845 * ~(red[10] ^ green[10] ^ blue[10]) & 1
848 /* new style BGR:565 / RGB:565 */
849 if (pdata->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) {
850 val = ((blue >> 11) & 0x001f);
851 val |= ((red >> 0) & 0xf800);
853 val = ((red >> 11) & 0x001f);
854 val |= ((blue >> 0) & 0xf800);
857 val |= ((green >> 5) & 0x07e0);
860 lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val);
865 case FB_VISUAL_MONO01:
867 val = (regno == 0) ? 0x00 : 0x1F;
868 lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val);
878 static int atmel_lcdfb_pan_display(struct fb_var_screeninfo *var,
879 struct fb_info *info)
881 dev_dbg(info->device, "%s\n", __func__);
883 atmel_lcdfb_update_dma(info, var);
888 static int atmel_lcdfb_blank(int blank_mode, struct fb_info *info)
890 struct atmel_lcdfb_info *sinfo = info->par;
892 switch (blank_mode) {
893 case FB_BLANK_UNBLANK:
894 case FB_BLANK_NORMAL:
895 atmel_lcdfb_start(sinfo);
897 case FB_BLANK_VSYNC_SUSPEND:
898 case FB_BLANK_HSYNC_SUSPEND:
900 case FB_BLANK_POWERDOWN:
901 atmel_lcdfb_stop(sinfo);
907 /* let fbcon do a soft blank for us */
908 return ((blank_mode == FB_BLANK_NORMAL) ? 1 : 0);
911 static struct fb_ops atmel_lcdfb_ops = {
912 .owner = THIS_MODULE,
913 .fb_check_var = atmel_lcdfb_check_var,
914 .fb_set_par = atmel_lcdfb_set_par,
915 .fb_setcolreg = atmel_lcdfb_setcolreg,
916 .fb_blank = atmel_lcdfb_blank,
917 .fb_pan_display = atmel_lcdfb_pan_display,
918 .fb_fillrect = cfb_fillrect,
919 .fb_copyarea = cfb_copyarea,
920 .fb_imageblit = cfb_imageblit,
923 static irqreturn_t atmel_lcdfb_interrupt(int irq, void *dev_id)
925 struct fb_info *info = dev_id;
926 struct atmel_lcdfb_info *sinfo = info->par;
929 status = lcdc_readl(sinfo, ATMEL_LCDC_ISR);
930 if (status & ATMEL_LCDC_UFLWI) {
931 dev_warn(info->device, "FIFO underflow %#x\n", status);
932 /* reset DMA and FIFO to avoid screen shifting */
933 schedule_work(&sinfo->task);
935 lcdc_writel(sinfo, ATMEL_LCDC_ICR, status);
940 * LCD controller task (to reset the LCD)
942 static void atmel_lcdfb_task(struct work_struct *work)
944 struct atmel_lcdfb_info *sinfo =
945 container_of(work, struct atmel_lcdfb_info, task);
947 atmel_lcdfb_reset(sinfo);
950 static int __init atmel_lcdfb_init_fbinfo(struct atmel_lcdfb_info *sinfo)
952 struct fb_info *info = sinfo->info;
955 info->var.activate |= FB_ACTIVATE_FORCE | FB_ACTIVATE_NOW;
957 dev_info(info->device,
958 "%luKiB frame buffer at %08lx (mapped at %p)\n",
959 (unsigned long)info->fix.smem_len / 1024,
960 (unsigned long)info->fix.smem_start,
963 /* Allocate colormap */
964 ret = fb_alloc_cmap(&info->cmap, 256, 0);
966 dev_err(info->device, "Alloc color map failed\n");
971 static void atmel_lcdfb_start_clock(struct atmel_lcdfb_info *sinfo)
973 clk_prepare_enable(sinfo->bus_clk);
974 clk_prepare_enable(sinfo->lcdc_clk);
977 static void atmel_lcdfb_stop_clock(struct atmel_lcdfb_info *sinfo)
979 clk_disable_unprepare(sinfo->bus_clk);
980 clk_disable_unprepare(sinfo->lcdc_clk);
984 static const struct of_device_id atmel_lcdfb_dt_ids[] = {
985 { .compatible = "atmel,at91sam9261-lcdc" , .data = &at91sam9261_config, },
986 { .compatible = "atmel,at91sam9263-lcdc" , .data = &at91sam9263_config, },
987 { .compatible = "atmel,at91sam9g10-lcdc" , .data = &at91sam9g10_config, },
988 { .compatible = "atmel,at91sam9g45-lcdc" , .data = &at91sam9g45_config, },
989 { .compatible = "atmel,at91sam9g45es-lcdc" , .data = &at91sam9g45es_config, },
990 { .compatible = "atmel,at91sam9rl-lcdc" , .data = &at91sam9rl_config, },
991 { .compatible = "atmel,at32ap-lcdc" , .data = &at32ap_config, },
995 MODULE_DEVICE_TABLE(of, atmel_lcdfb_dt_ids);
997 static const char *atmel_lcdfb_wiring_modes[] = {
998 [ATMEL_LCDC_WIRING_BGR] = "BRG",
999 [ATMEL_LCDC_WIRING_RGB] = "RGB",
1002 const int atmel_lcdfb_get_of_wiring_modes(struct device_node *np)
1007 err = of_property_read_string(np, "atmel,lcd-wiring-mode", &mode);
1009 return ATMEL_LCDC_WIRING_BGR;
1011 for (i = 0; i < ARRAY_SIZE(atmel_lcdfb_wiring_modes); i++)
1012 if (!strcasecmp(mode, atmel_lcdfb_wiring_modes[i]))
1018 static void atmel_lcdfb_power_control_gpio(struct atmel_lcdfb_pdata *pdata, int on)
1020 struct atmel_lcdfb_power_ctrl_gpio *og;
1022 list_for_each_entry(og, &pdata->pwr_gpios, list)
1023 gpio_set_value(og->gpio, on);
1026 static int atmel_lcdfb_of_init(struct atmel_lcdfb_info *sinfo)
1028 struct fb_info *info = sinfo->info;
1029 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
1030 struct fb_var_screeninfo *var = &info->var;
1031 struct device *dev = &sinfo->pdev->dev;
1032 struct device_node *np =dev->of_node;
1033 struct device_node *display_np;
1034 struct device_node *timings_np;
1035 struct display_timings *timings;
1036 enum of_gpio_flags flags;
1037 struct atmel_lcdfb_power_ctrl_gpio *og;
1038 bool is_gpio_power = false;
1042 sinfo->config = (struct atmel_lcdfb_config*)
1043 of_match_device(atmel_lcdfb_dt_ids, dev)->data;
1045 display_np = of_parse_phandle(np, "display", 0);
1047 dev_err(dev, "failed to find display phandle\n");
1051 ret = of_property_read_u32(display_np, "bits-per-pixel", &var->bits_per_pixel);
1053 dev_err(dev, "failed to get property bits-per-pixel\n");
1054 goto put_display_node;
1057 ret = of_property_read_u32(display_np, "atmel,guard-time", &pdata->guard_time);
1059 dev_err(dev, "failed to get property atmel,guard-time\n");
1060 goto put_display_node;
1063 ret = of_property_read_u32(display_np, "atmel,lcdcon2", &pdata->default_lcdcon2);
1065 dev_err(dev, "failed to get property atmel,lcdcon2\n");
1066 goto put_display_node;
1069 ret = of_property_read_u32(display_np, "atmel,dmacon", &pdata->default_dmacon);
1071 dev_err(dev, "failed to get property bits-per-pixel\n");
1072 goto put_display_node;
1075 INIT_LIST_HEAD(&pdata->pwr_gpios);
1077 for (i = 0; i < of_gpio_named_count(display_np, "atmel,power-control-gpio"); i++) {
1078 gpio = of_get_named_gpio_flags(display_np, "atmel,power-control-gpio",
1083 og = devm_kzalloc(dev, sizeof(*og), GFP_KERNEL);
1085 goto put_display_node;
1088 og->active_low = flags & OF_GPIO_ACTIVE_LOW;
1089 is_gpio_power = true;
1090 ret = devm_gpio_request(dev, gpio, "lcd-power-control-gpio");
1092 dev_err(dev, "request gpio %d failed\n", gpio);
1093 goto put_display_node;
1096 ret = gpio_direction_output(gpio, og->active_low);
1098 dev_err(dev, "set direction output gpio %d failed\n", gpio);
1099 goto put_display_node;
1101 list_add(&og->list, &pdata->pwr_gpios);
1105 pdata->atmel_lcdfb_power_control = atmel_lcdfb_power_control_gpio;
1107 ret = atmel_lcdfb_get_of_wiring_modes(display_np);
1109 dev_err(dev, "invalid atmel,lcd-wiring-mode\n");
1110 goto put_display_node;
1112 pdata->lcd_wiring_mode = ret;
1114 pdata->lcdcon_is_backlight = of_property_read_bool(display_np, "atmel,lcdcon-backlight");
1115 pdata->lcdcon_pol_negative = of_property_read_bool(display_np, "atmel,lcdcon-backlight-inverted");
1117 timings = of_get_display_timings(display_np);
1119 dev_err(dev, "failed to get display timings\n");
1121 goto put_display_node;
1124 timings_np = of_find_node_by_name(display_np, "display-timings");
1126 dev_err(dev, "failed to find display-timings node\n");
1128 goto put_display_node;
1131 for (i = 0; i < of_get_child_count(timings_np); i++) {
1132 struct videomode vm;
1133 struct fb_videomode fb_vm;
1135 ret = videomode_from_timings(timings, &vm, i);
1137 goto put_timings_node;
1138 ret = fb_videomode_from_videomode(&vm, &fb_vm);
1140 goto put_timings_node;
1142 fb_add_videomode(&fb_vm, &info->modelist);
1148 of_node_put(timings_np);
1150 of_node_put(display_np);
1154 static int atmel_lcdfb_of_init(struct atmel_lcdfb_info *sinfo)
1160 static int __init atmel_lcdfb_probe(struct platform_device *pdev)
1162 struct device *dev = &pdev->dev;
1163 struct fb_info *info;
1164 struct atmel_lcdfb_info *sinfo;
1165 struct atmel_lcdfb_pdata *pdata = NULL;
1166 struct resource *regs = NULL;
1167 struct resource *map = NULL;
1168 struct fb_modelist *modelist;
1171 dev_dbg(dev, "%s BEGIN\n", __func__);
1174 info = framebuffer_alloc(sizeof(struct atmel_lcdfb_info), dev);
1176 dev_err(dev, "cannot allocate memory\n");
1184 INIT_LIST_HEAD(&info->modelist);
1186 if (pdev->dev.of_node) {
1187 ret = atmel_lcdfb_of_init(sinfo);
1190 } else if (dev_get_platdata(dev)) {
1191 struct fb_monspecs *monspecs;
1194 pdata = dev_get_platdata(dev);
1195 monspecs = pdata->default_monspecs;
1196 sinfo->pdata = *pdata;
1198 for (i = 0; i < monspecs->modedb_len; i++)
1199 fb_add_videomode(&monspecs->modedb[i], &info->modelist);
1201 sinfo->config = atmel_lcdfb_get_config(pdev);
1203 info->var.bits_per_pixel = pdata->default_bpp ? pdata->default_bpp : 16;
1204 memcpy(&info->monspecs, pdata->default_monspecs, sizeof(info->monspecs));
1206 dev_err(dev, "cannot get default configuration\n");
1213 sinfo->reg_lcd = devm_regulator_get(&pdev->dev, "lcd");
1214 if (IS_ERR(sinfo->reg_lcd))
1215 sinfo->reg_lcd = NULL;
1217 info->flags = ATMEL_LCDFB_FBINFO_DEFAULT;
1218 info->pseudo_palette = sinfo->pseudo_palette;
1219 info->fbops = &atmel_lcdfb_ops;
1221 info->fix = atmel_lcdfb_fix;
1222 strcpy(info->fix.id, sinfo->pdev->name);
1224 /* Enable LCDC Clocks */
1225 sinfo->bus_clk = clk_get(dev, "hclk");
1226 if (IS_ERR(sinfo->bus_clk)) {
1227 ret = PTR_ERR(sinfo->bus_clk);
1230 sinfo->lcdc_clk = clk_get(dev, "lcdc_clk");
1231 if (IS_ERR(sinfo->lcdc_clk)) {
1232 ret = PTR_ERR(sinfo->lcdc_clk);
1235 atmel_lcdfb_start_clock(sinfo);
1237 modelist = list_first_entry(&info->modelist,
1238 struct fb_modelist, list);
1239 fb_videomode_to_var(&info->var, &modelist->mode);
1241 atmel_lcdfb_check_var(&info->var, info);
1243 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1245 dev_err(dev, "resources unusable\n");
1250 sinfo->irq_base = platform_get_irq(pdev, 0);
1251 if (sinfo->irq_base < 0) {
1252 dev_err(dev, "unable to get irq\n");
1253 ret = sinfo->irq_base;
1257 /* Initialize video memory */
1258 map = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1260 /* use a pre-allocated memory buffer */
1261 info->fix.smem_start = map->start;
1262 info->fix.smem_len = resource_size(map);
1263 if (!request_mem_region(info->fix.smem_start,
1264 info->fix.smem_len, pdev->name)) {
1269 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
1270 if (!info->screen_base) {
1272 goto release_intmem;
1276 * Don't clear the framebuffer -- someone may have set
1277 * up a splash image.
1280 /* allocate memory buffer */
1281 ret = atmel_lcdfb_alloc_video_memory(sinfo);
1283 dev_err(dev, "cannot allocate framebuffer: %d\n", ret);
1288 /* LCDC registers */
1289 info->fix.mmio_start = regs->start;
1290 info->fix.mmio_len = resource_size(regs);
1292 if (!request_mem_region(info->fix.mmio_start,
1293 info->fix.mmio_len, pdev->name)) {
1298 sinfo->mmio = ioremap(info->fix.mmio_start, info->fix.mmio_len);
1300 dev_err(dev, "cannot map LCDC registers\n");
1305 /* Initialize PWM for contrast or backlight ("off") */
1306 init_contrast(sinfo);
1309 ret = request_irq(sinfo->irq_base, atmel_lcdfb_interrupt, 0, pdev->name, info);
1311 dev_err(dev, "request_irq failed: %d\n", ret);
1315 /* Some operations on the LCDC might sleep and
1316 * require a preemptible task context */
1317 INIT_WORK(&sinfo->task, atmel_lcdfb_task);
1319 ret = atmel_lcdfb_init_fbinfo(sinfo);
1321 dev_err(dev, "init fbinfo failed: %d\n", ret);
1322 goto unregister_irqs;
1325 ret = atmel_lcdfb_set_par(info);
1327 dev_err(dev, "set par failed: %d\n", ret);
1328 goto unregister_irqs;
1331 dev_set_drvdata(dev, info);
1334 * Tell the world that we're ready to go
1336 ret = register_framebuffer(info);
1338 dev_err(dev, "failed to register framebuffer device: %d\n", ret);
1342 /* Power up the LCDC screen */
1343 atmel_lcdfb_power_control(sinfo, 1);
1345 dev_info(dev, "fb%d: Atmel LCDC at 0x%08lx (mapped at %p), irq %d\n",
1346 info->node, info->fix.mmio_start, sinfo->mmio, sinfo->irq_base);
1351 dev_set_drvdata(dev, NULL);
1352 fb_dealloc_cmap(&info->cmap);
1354 cancel_work_sync(&sinfo->task);
1355 free_irq(sinfo->irq_base, info);
1357 exit_backlight(sinfo);
1358 iounmap(sinfo->mmio);
1360 release_mem_region(info->fix.mmio_start, info->fix.mmio_len);
1363 iounmap(info->screen_base);
1365 atmel_lcdfb_free_video_memory(sinfo);
1369 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1371 atmel_lcdfb_stop_clock(sinfo);
1372 clk_put(sinfo->lcdc_clk);
1374 clk_put(sinfo->bus_clk);
1376 framebuffer_release(info);
1378 dev_dbg(dev, "%s FAILED\n", __func__);
1382 static int __exit atmel_lcdfb_remove(struct platform_device *pdev)
1384 struct device *dev = &pdev->dev;
1385 struct fb_info *info = dev_get_drvdata(dev);
1386 struct atmel_lcdfb_info *sinfo;
1387 struct atmel_lcdfb_pdata *pdata;
1389 if (!info || !info->par)
1392 pdata = &sinfo->pdata;
1394 cancel_work_sync(&sinfo->task);
1395 exit_backlight(sinfo);
1396 atmel_lcdfb_power_control(sinfo, 0);
1397 unregister_framebuffer(info);
1398 atmel_lcdfb_stop_clock(sinfo);
1399 clk_put(sinfo->lcdc_clk);
1400 clk_put(sinfo->bus_clk);
1401 fb_dealloc_cmap(&info->cmap);
1402 free_irq(sinfo->irq_base, info);
1403 iounmap(sinfo->mmio);
1404 release_mem_region(info->fix.mmio_start, info->fix.mmio_len);
1405 if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) {
1406 iounmap(info->screen_base);
1407 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1409 atmel_lcdfb_free_video_memory(sinfo);
1412 framebuffer_release(info);
1419 static int atmel_lcdfb_suspend(struct platform_device *pdev, pm_message_t mesg)
1421 struct fb_info *info = platform_get_drvdata(pdev);
1422 struct atmel_lcdfb_info *sinfo = info->par;
1425 * We don't want to handle interrupts while the clock is
1426 * stopped. It may take forever.
1428 lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL);
1430 sinfo->saved_lcdcon = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_CTR);
1431 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, 0);
1432 atmel_lcdfb_power_control(sinfo, 0);
1433 atmel_lcdfb_stop(sinfo);
1434 atmel_lcdfb_stop_clock(sinfo);
1439 static int atmel_lcdfb_resume(struct platform_device *pdev)
1441 struct fb_info *info = platform_get_drvdata(pdev);
1442 struct atmel_lcdfb_info *sinfo = info->par;
1444 atmel_lcdfb_start_clock(sinfo);
1445 atmel_lcdfb_start(sinfo);
1446 atmel_lcdfb_power_control(sinfo, 1);
1447 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, sinfo->saved_lcdcon);
1449 /* Enable FIFO & DMA errors */
1450 lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI
1451 | ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI);
1457 #define atmel_lcdfb_suspend NULL
1458 #define atmel_lcdfb_resume NULL
1461 static struct platform_driver atmel_lcdfb_driver = {
1462 .remove = __exit_p(atmel_lcdfb_remove),
1463 .suspend = atmel_lcdfb_suspend,
1464 .resume = atmel_lcdfb_resume,
1465 .id_table = atmel_lcdfb_devtypes,
1467 .name = "atmel_lcdfb",
1468 .owner = THIS_MODULE,
1469 .of_match_table = of_match_ptr(atmel_lcdfb_dt_ids),
1473 module_platform_driver_probe(atmel_lcdfb_driver, atmel_lcdfb_probe);
1475 MODULE_DESCRIPTION("AT91/AT32 LCD Controller framebuffer driver");
1476 MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");
1477 MODULE_LICENSE("GPL");