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>
33 #include <video/atmel_lcdc.h>
35 struct atmel_lcdfb_config {
36 bool have_alt_pixclock;
38 bool have_intensity_bit;
41 /* LCD Controller info data structure, stored in device platform_data */
42 struct atmel_lcdfb_info {
47 struct work_struct task;
49 unsigned int smem_len;
50 struct platform_device *pdev;
54 struct backlight_device *backlight;
58 u32 pseudo_palette[16];
59 bool have_intensity_bit;
61 struct atmel_lcdfb_pdata pdata;
63 struct atmel_lcdfb_config *config;
64 struct regulator *reg_lcd;
67 struct atmel_lcdfb_power_ctrl_gpio {
71 struct list_head list;
74 #define lcdc_readl(sinfo, reg) __raw_readl((sinfo)->mmio+(reg))
75 #define lcdc_writel(sinfo, reg, val) __raw_writel((val), (sinfo)->mmio+(reg))
77 /* configurable parameters */
78 #define ATMEL_LCDC_CVAL_DEFAULT 0xc8
79 #define ATMEL_LCDC_DMA_BURST_LEN 8 /* words */
80 #define ATMEL_LCDC_FIFO_SIZE 512 /* words */
82 static struct atmel_lcdfb_config at91sam9261_config = {
84 .have_intensity_bit = true,
87 static struct atmel_lcdfb_config at91sam9263_config = {
88 .have_intensity_bit = true,
91 static struct atmel_lcdfb_config at91sam9g10_config = {
95 static struct atmel_lcdfb_config at91sam9g45_config = {
96 .have_alt_pixclock = true,
99 static struct atmel_lcdfb_config at91sam9g45es_config = {
102 static struct atmel_lcdfb_config at91sam9rl_config = {
103 .have_intensity_bit = true,
106 static struct atmel_lcdfb_config at32ap_config = {
110 static const struct platform_device_id atmel_lcdfb_devtypes[] = {
112 .name = "at91sam9261-lcdfb",
113 .driver_data = (unsigned long)&at91sam9261_config,
115 .name = "at91sam9263-lcdfb",
116 .driver_data = (unsigned long)&at91sam9263_config,
118 .name = "at91sam9g10-lcdfb",
119 .driver_data = (unsigned long)&at91sam9g10_config,
121 .name = "at91sam9g45-lcdfb",
122 .driver_data = (unsigned long)&at91sam9g45_config,
124 .name = "at91sam9g45es-lcdfb",
125 .driver_data = (unsigned long)&at91sam9g45es_config,
127 .name = "at91sam9rl-lcdfb",
128 .driver_data = (unsigned long)&at91sam9rl_config,
130 .name = "at32ap-lcdfb",
131 .driver_data = (unsigned long)&at32ap_config,
136 MODULE_DEVICE_TABLE(platform, atmel_lcdfb_devtypes);
138 static struct atmel_lcdfb_config *
139 atmel_lcdfb_get_config(struct platform_device *pdev)
143 data = platform_get_device_id(pdev)->driver_data;
145 return (struct atmel_lcdfb_config *)data;
148 #if defined(CONFIG_ARCH_AT91)
149 #define ATMEL_LCDFB_FBINFO_DEFAULT (FBINFO_DEFAULT \
150 | FBINFO_PARTIAL_PAN_OK \
151 | FBINFO_HWACCEL_YPAN)
153 static inline void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo,
154 struct fb_var_screeninfo *var,
155 struct fb_info *info)
159 #elif defined(CONFIG_AVR32)
160 #define ATMEL_LCDFB_FBINFO_DEFAULT (FBINFO_DEFAULT \
161 | FBINFO_PARTIAL_PAN_OK \
162 | FBINFO_HWACCEL_XPAN \
163 | FBINFO_HWACCEL_YPAN)
165 static void atmel_lcdfb_update_dma2d(struct atmel_lcdfb_info *sinfo,
166 struct fb_var_screeninfo *var,
167 struct fb_info *info)
172 pixeloff = (var->xoffset * info->var.bits_per_pixel) & 0x1f;
174 dma2dcfg = (info->var.xres_virtual - info->var.xres)
175 * info->var.bits_per_pixel / 8;
176 dma2dcfg |= pixeloff << ATMEL_LCDC_PIXELOFF_OFFSET;
177 lcdc_writel(sinfo, ATMEL_LCDC_DMA2DCFG, dma2dcfg);
179 /* Update configuration */
180 lcdc_writel(sinfo, ATMEL_LCDC_DMACON,
181 lcdc_readl(sinfo, ATMEL_LCDC_DMACON)
182 | ATMEL_LCDC_DMAUPDT);
186 static u32 contrast_ctr = ATMEL_LCDC_PS_DIV8
187 | ATMEL_LCDC_POL_POSITIVE
188 | ATMEL_LCDC_ENA_PWMENABLE;
190 #ifdef CONFIG_BACKLIGHT_ATMEL_LCDC
192 /* some bl->props field just changed */
193 static int atmel_bl_update_status(struct backlight_device *bl)
195 struct atmel_lcdfb_info *sinfo = bl_get_data(bl);
196 int power = sinfo->bl_power;
197 int brightness = bl->props.brightness;
199 /* REVISIT there may be a meaningful difference between
200 * fb_blank and power ... there seem to be some cases
201 * this doesn't handle correctly.
203 if (bl->props.fb_blank != sinfo->bl_power)
204 power = bl->props.fb_blank;
205 else if (bl->props.power != sinfo->bl_power)
206 power = bl->props.power;
208 if (brightness < 0 && power == FB_BLANK_UNBLANK)
209 brightness = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL);
210 else if (power != FB_BLANK_UNBLANK)
213 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_VAL, brightness);
214 if (contrast_ctr & ATMEL_LCDC_POL_POSITIVE)
215 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR,
216 brightness ? contrast_ctr : 0);
218 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, contrast_ctr);
220 bl->props.fb_blank = bl->props.power = sinfo->bl_power = power;
225 static int atmel_bl_get_brightness(struct backlight_device *bl)
227 struct atmel_lcdfb_info *sinfo = bl_get_data(bl);
229 return lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_VAL);
232 static const struct backlight_ops atmel_lcdc_bl_ops = {
233 .update_status = atmel_bl_update_status,
234 .get_brightness = atmel_bl_get_brightness,
237 static void init_backlight(struct atmel_lcdfb_info *sinfo)
239 struct backlight_properties props;
240 struct backlight_device *bl;
242 sinfo->bl_power = FB_BLANK_UNBLANK;
244 if (sinfo->backlight)
247 memset(&props, 0, sizeof(struct backlight_properties));
248 props.type = BACKLIGHT_RAW;
249 props.max_brightness = 0xff;
250 bl = backlight_device_register("backlight", &sinfo->pdev->dev, sinfo,
251 &atmel_lcdc_bl_ops, &props);
253 dev_err(&sinfo->pdev->dev, "error %ld on backlight register\n",
257 sinfo->backlight = bl;
259 bl->props.power = FB_BLANK_UNBLANK;
260 bl->props.fb_blank = FB_BLANK_UNBLANK;
261 bl->props.brightness = atmel_bl_get_brightness(bl);
264 static void exit_backlight(struct atmel_lcdfb_info *sinfo)
266 if (!sinfo->backlight)
269 if (sinfo->backlight->ops) {
270 sinfo->backlight->props.power = FB_BLANK_POWERDOWN;
271 sinfo->backlight->ops->update_status(sinfo->backlight);
273 backlight_device_unregister(sinfo->backlight);
278 static void init_backlight(struct atmel_lcdfb_info *sinfo)
280 dev_warn(&sinfo->pdev->dev, "backlight control is not available\n");
283 static void exit_backlight(struct atmel_lcdfb_info *sinfo)
289 static void init_contrast(struct atmel_lcdfb_info *sinfo)
291 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
293 /* contrast pwm can be 'inverted' */
294 if (pdata->lcdcon_pol_negative)
295 contrast_ctr &= ~(ATMEL_LCDC_POL_POSITIVE);
297 /* have some default contrast/backlight settings */
298 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, contrast_ctr);
299 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_VAL, ATMEL_LCDC_CVAL_DEFAULT);
301 if (pdata->lcdcon_is_backlight)
302 init_backlight(sinfo);
305 static inline void atmel_lcdfb_power_control(struct atmel_lcdfb_info *sinfo, int on)
308 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
310 if (pdata->atmel_lcdfb_power_control)
311 pdata->atmel_lcdfb_power_control(pdata, on);
312 else if (sinfo->reg_lcd) {
314 ret = regulator_enable(sinfo->reg_lcd);
316 dev_err(&sinfo->pdev->dev,
317 "lcd regulator enable failed: %d\n", ret);
319 ret = regulator_disable(sinfo->reg_lcd);
321 dev_err(&sinfo->pdev->dev,
322 "lcd regulator disable failed: %d\n", ret);
327 static struct fb_fix_screeninfo atmel_lcdfb_fix __initdata = {
328 .type = FB_TYPE_PACKED_PIXELS,
329 .visual = FB_VISUAL_TRUECOLOR,
333 .accel = FB_ACCEL_NONE,
336 static unsigned long compute_hozval(struct atmel_lcdfb_info *sinfo,
339 unsigned long lcdcon2;
342 if (!sinfo->config->have_hozval)
345 lcdcon2 = lcdc_readl(sinfo, ATMEL_LCDC_LCDCON2);
347 if ((lcdcon2 & ATMEL_LCDC_DISTYPE) != ATMEL_LCDC_DISTYPE_TFT) {
349 if ((lcdcon2 & ATMEL_LCDC_DISTYPE) == ATMEL_LCDC_DISTYPE_STNCOLOR) {
352 if ( (lcdcon2 & ATMEL_LCDC_IFWIDTH) == ATMEL_LCDC_IFWIDTH_4
353 || ( (lcdcon2 & ATMEL_LCDC_IFWIDTH) == ATMEL_LCDC_IFWIDTH_8
354 && (lcdcon2 & ATMEL_LCDC_SCANMOD) == ATMEL_LCDC_SCANMOD_DUAL ))
355 value = DIV_ROUND_UP(value, 4);
357 value = DIV_ROUND_UP(value, 8);
363 static void atmel_lcdfb_stop_nowait(struct atmel_lcdfb_info *sinfo)
365 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
367 /* Turn off the LCD controller and the DMA controller */
368 lcdc_writel(sinfo, ATMEL_LCDC_PWRCON,
369 pdata->guard_time << ATMEL_LCDC_GUARDT_OFFSET);
371 /* Wait for the LCDC core to become idle */
372 while (lcdc_readl(sinfo, ATMEL_LCDC_PWRCON) & ATMEL_LCDC_BUSY)
375 lcdc_writel(sinfo, ATMEL_LCDC_DMACON, 0);
378 static void atmel_lcdfb_stop(struct atmel_lcdfb_info *sinfo)
380 atmel_lcdfb_stop_nowait(sinfo);
382 /* Wait for DMA engine to become idle... */
383 while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY)
387 static void atmel_lcdfb_start(struct atmel_lcdfb_info *sinfo)
389 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
391 lcdc_writel(sinfo, ATMEL_LCDC_DMACON, pdata->default_dmacon);
392 lcdc_writel(sinfo, ATMEL_LCDC_PWRCON,
393 (pdata->guard_time << ATMEL_LCDC_GUARDT_OFFSET)
397 static void atmel_lcdfb_update_dma(struct fb_info *info,
398 struct fb_var_screeninfo *var)
400 struct atmel_lcdfb_info *sinfo = info->par;
401 struct fb_fix_screeninfo *fix = &info->fix;
402 unsigned long dma_addr;
404 dma_addr = (fix->smem_start + var->yoffset * fix->line_length
405 + var->xoffset * info->var.bits_per_pixel / 8);
409 /* Set framebuffer DMA base address and pixel offset */
410 lcdc_writel(sinfo, ATMEL_LCDC_DMABADDR1, dma_addr);
412 atmel_lcdfb_update_dma2d(sinfo, var, info);
415 static inline void atmel_lcdfb_free_video_memory(struct atmel_lcdfb_info *sinfo)
417 struct fb_info *info = sinfo->info;
419 dma_free_writecombine(info->device, info->fix.smem_len,
420 info->screen_base, info->fix.smem_start);
424 * atmel_lcdfb_alloc_video_memory - Allocate framebuffer memory
425 * @sinfo: the frame buffer to allocate memory for
427 * This function is called only from the atmel_lcdfb_probe()
428 * so no locking by fb_info->mm_lock around smem_len setting is needed.
430 static int atmel_lcdfb_alloc_video_memory(struct atmel_lcdfb_info *sinfo)
432 struct fb_info *info = sinfo->info;
433 struct fb_var_screeninfo *var = &info->var;
434 unsigned int smem_len;
436 smem_len = (var->xres_virtual * var->yres_virtual
437 * ((var->bits_per_pixel + 7) / 8));
438 info->fix.smem_len = max(smem_len, sinfo->smem_len);
440 info->screen_base = dma_alloc_writecombine(info->device, info->fix.smem_len,
441 (dma_addr_t *)&info->fix.smem_start, GFP_KERNEL);
443 if (!info->screen_base) {
447 memset(info->screen_base, 0, info->fix.smem_len);
452 static const struct fb_videomode *atmel_lcdfb_choose_mode(struct fb_var_screeninfo *var,
453 struct fb_info *info)
455 struct fb_videomode varfbmode;
456 const struct fb_videomode *fbmode = NULL;
458 fb_var_to_videomode(&varfbmode, var);
459 fbmode = fb_find_nearest_mode(&varfbmode, &info->modelist);
461 fb_videomode_to_var(var, fbmode);
467 * atmel_lcdfb_check_var - Validates a var passed in.
468 * @var: frame buffer variable screen structure
469 * @info: frame buffer structure that represents a single frame buffer
471 * Checks to see if the hardware supports the state requested by
472 * var passed in. This function does not alter the hardware
473 * state!!! This means the data stored in struct fb_info and
474 * struct atmel_lcdfb_info do not change. This includes the var
475 * inside of struct fb_info. Do NOT change these. This function
476 * can be called on its own if we intent to only test a mode and
477 * not actually set it. The stuff in modedb.c is a example of
478 * this. If the var passed in is slightly off by what the
479 * hardware can support then we alter the var PASSED in to what
480 * we can do. If the hardware doesn't support mode change a
481 * -EINVAL will be returned by the upper layers. You don't need
482 * to implement this function then. If you hardware doesn't
483 * support changing the resolution then this function is not
484 * needed. In this case the driver would just provide a var that
485 * represents the static state the screen is in.
487 * Returns negative errno on error, or zero on success.
489 static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var,
490 struct fb_info *info)
492 struct device *dev = info->device;
493 struct atmel_lcdfb_info *sinfo = info->par;
494 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
495 unsigned long clk_value_khz;
497 clk_value_khz = clk_get_rate(sinfo->lcdc_clk) / 1000;
499 dev_dbg(dev, "%s:\n", __func__);
501 if (!(var->pixclock && var->bits_per_pixel)) {
502 /* choose a suitable mode if possible */
503 if (!atmel_lcdfb_choose_mode(var, info)) {
504 dev_err(dev, "needed value not specified\n");
509 dev_dbg(dev, " resolution: %ux%u\n", var->xres, var->yres);
510 dev_dbg(dev, " pixclk: %lu KHz\n", PICOS2KHZ(var->pixclock));
511 dev_dbg(dev, " bpp: %u\n", var->bits_per_pixel);
512 dev_dbg(dev, " clk: %lu KHz\n", clk_value_khz);
514 if (PICOS2KHZ(var->pixclock) > clk_value_khz) {
515 dev_err(dev, "%lu KHz pixel clock is too fast\n", PICOS2KHZ(var->pixclock));
519 /* Do not allow to have real resoulution larger than virtual */
520 if (var->xres > var->xres_virtual)
521 var->xres_virtual = var->xres;
523 if (var->yres > var->yres_virtual)
524 var->yres_virtual = var->yres;
526 /* Force same alignment for each line */
527 var->xres = (var->xres + 3) & ~3UL;
528 var->xres_virtual = (var->xres_virtual + 3) & ~3UL;
530 var->red.msb_right = var->green.msb_right = var->blue.msb_right = 0;
531 var->transp.msb_right = 0;
532 var->transp.offset = var->transp.length = 0;
533 var->xoffset = var->yoffset = 0;
535 if (info->fix.smem_len) {
536 unsigned int smem_len = (var->xres_virtual * var->yres_virtual
537 * ((var->bits_per_pixel + 7) / 8));
538 if (smem_len > info->fix.smem_len) {
539 dev_err(dev, "Frame buffer is too small (%u) for screen size (need at least %u)\n",
540 info->fix.smem_len, smem_len);
545 /* Saturate vertical and horizontal timings at maximum values */
546 var->vsync_len = min_t(u32, var->vsync_len,
547 (ATMEL_LCDC_VPW >> ATMEL_LCDC_VPW_OFFSET) + 1);
548 var->upper_margin = min_t(u32, var->upper_margin,
549 ATMEL_LCDC_VBP >> ATMEL_LCDC_VBP_OFFSET);
550 var->lower_margin = min_t(u32, var->lower_margin,
552 var->right_margin = min_t(u32, var->right_margin,
553 (ATMEL_LCDC_HFP >> ATMEL_LCDC_HFP_OFFSET) + 1);
554 var->hsync_len = min_t(u32, var->hsync_len,
555 (ATMEL_LCDC_HPW >> ATMEL_LCDC_HPW_OFFSET) + 1);
556 var->left_margin = min_t(u32, var->left_margin,
559 /* Some parameters can't be zero */
560 var->vsync_len = max_t(u32, var->vsync_len, 1);
561 var->right_margin = max_t(u32, var->right_margin, 1);
562 var->hsync_len = max_t(u32, var->hsync_len, 1);
563 var->left_margin = max_t(u32, var->left_margin, 1);
565 switch (var->bits_per_pixel) {
570 var->red.offset = var->green.offset = var->blue.offset = 0;
571 var->red.length = var->green.length = var->blue.length
572 = var->bits_per_pixel;
575 /* Older SOCs use IBGR:555 rather than BGR:565. */
576 if (sinfo->config->have_intensity_bit)
577 var->green.length = 5;
579 var->green.length = 6;
581 if (pdata->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) {
583 var->red.offset = var->green.length + 5;
584 var->blue.offset = 0;
588 var->blue.offset = var->green.length + 5;
590 var->green.offset = 5;
591 var->red.length = var->blue.length = 5;
594 var->transp.offset = 24;
595 var->transp.length = 8;
598 if (pdata->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) {
600 var->red.offset = 16;
601 var->blue.offset = 0;
605 var->blue.offset = 16;
607 var->green.offset = 8;
608 var->red.length = var->green.length = var->blue.length = 8;
611 dev_err(dev, "color depth %d not supported\n",
612 var->bits_per_pixel);
622 static void atmel_lcdfb_reset(struct atmel_lcdfb_info *sinfo)
626 atmel_lcdfb_stop(sinfo);
627 atmel_lcdfb_start(sinfo);
631 * atmel_lcdfb_set_par - Alters the hardware state.
632 * @info: frame buffer structure that represents a single frame buffer
634 * Using the fb_var_screeninfo in fb_info we set the resolution
635 * of the this particular framebuffer. This function alters the
636 * par AND the fb_fix_screeninfo stored in fb_info. It doesn't
637 * not alter var in fb_info since we are using that data. This
638 * means we depend on the data in var inside fb_info to be
639 * supported by the hardware. atmel_lcdfb_check_var is always called
640 * before atmel_lcdfb_set_par to ensure this. Again if you can't
641 * change the resolution you don't need this function.
644 static int atmel_lcdfb_set_par(struct fb_info *info)
646 struct atmel_lcdfb_info *sinfo = info->par;
647 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
648 unsigned long hozval_linesz;
650 unsigned long clk_value_khz;
651 unsigned long bits_per_line;
652 unsigned long pix_factor = 2;
656 dev_dbg(info->device, "%s:\n", __func__);
657 dev_dbg(info->device, " * resolution: %ux%u (%ux%u virtual)\n",
658 info->var.xres, info->var.yres,
659 info->var.xres_virtual, info->var.yres_virtual);
661 atmel_lcdfb_stop_nowait(sinfo);
663 if (info->var.bits_per_pixel == 1)
664 info->fix.visual = FB_VISUAL_MONO01;
665 else if (info->var.bits_per_pixel <= 8)
666 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
668 info->fix.visual = FB_VISUAL_TRUECOLOR;
670 bits_per_line = info->var.xres_virtual * info->var.bits_per_pixel;
671 info->fix.line_length = DIV_ROUND_UP(bits_per_line, 8);
673 /* Re-initialize the DMA engine... */
674 dev_dbg(info->device, " * update DMA engine\n");
675 atmel_lcdfb_update_dma(info, &info->var);
677 /* ...set frame size and burst length = 8 words (?) */
678 value = (info->var.yres * info->var.xres * info->var.bits_per_pixel) / 32;
679 value |= ((ATMEL_LCDC_DMA_BURST_LEN - 1) << ATMEL_LCDC_BLENGTH_OFFSET);
680 lcdc_writel(sinfo, ATMEL_LCDC_DMAFRMCFG, value);
682 /* Now, the LCDC core... */
684 /* Set pixel clock */
685 if (sinfo->config->have_alt_pixclock)
688 clk_value_khz = clk_get_rate(sinfo->lcdc_clk) / 1000;
690 value = DIV_ROUND_UP(clk_value_khz, PICOS2KHZ(info->var.pixclock));
692 if (value < pix_factor) {
693 dev_notice(info->device, "Bypassing pixel clock divider\n");
694 lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1, ATMEL_LCDC_BYPASS);
696 value = (value / pix_factor) - 1;
697 dev_dbg(info->device, " * programming CLKVAL = 0x%08lx\n",
699 lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1,
700 value << ATMEL_LCDC_CLKVAL_OFFSET);
702 KHZ2PICOS(clk_value_khz / (pix_factor * (value + 1)));
703 dev_dbg(info->device, " updated pixclk: %lu KHz\n",
704 PICOS2KHZ(info->var.pixclock));
708 /* Initialize control register 2 */
709 value = pdata->default_lcdcon2;
711 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
712 value |= ATMEL_LCDC_INVLINE_INVERTED;
713 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
714 value |= ATMEL_LCDC_INVFRAME_INVERTED;
716 switch (info->var.bits_per_pixel) {
717 case 1: value |= ATMEL_LCDC_PIXELSIZE_1; break;
718 case 2: value |= ATMEL_LCDC_PIXELSIZE_2; break;
719 case 4: value |= ATMEL_LCDC_PIXELSIZE_4; break;
720 case 8: value |= ATMEL_LCDC_PIXELSIZE_8; break;
721 case 15: /* fall through */
722 case 16: value |= ATMEL_LCDC_PIXELSIZE_16; break;
723 case 24: value |= ATMEL_LCDC_PIXELSIZE_24; break;
724 case 32: value |= ATMEL_LCDC_PIXELSIZE_32; break;
725 default: BUG(); break;
727 dev_dbg(info->device, " * LCDCON2 = %08lx\n", value);
728 lcdc_writel(sinfo, ATMEL_LCDC_LCDCON2, value);
730 /* Vertical timing */
731 value = (info->var.vsync_len - 1) << ATMEL_LCDC_VPW_OFFSET;
732 value |= info->var.upper_margin << ATMEL_LCDC_VBP_OFFSET;
733 value |= info->var.lower_margin;
734 dev_dbg(info->device, " * LCDTIM1 = %08lx\n", value);
735 lcdc_writel(sinfo, ATMEL_LCDC_TIM1, value);
737 /* Horizontal timing */
738 value = (info->var.right_margin - 1) << ATMEL_LCDC_HFP_OFFSET;
739 value |= (info->var.hsync_len - 1) << ATMEL_LCDC_HPW_OFFSET;
740 value |= (info->var.left_margin - 1);
741 dev_dbg(info->device, " * LCDTIM2 = %08lx\n", value);
742 lcdc_writel(sinfo, ATMEL_LCDC_TIM2, value);
744 /* Horizontal value (aka line size) */
745 hozval_linesz = compute_hozval(sinfo, info->var.xres);
748 value = (hozval_linesz - 1) << ATMEL_LCDC_HOZVAL_OFFSET;
749 value |= info->var.yres - 1;
750 dev_dbg(info->device, " * LCDFRMCFG = %08lx\n", value);
751 lcdc_writel(sinfo, ATMEL_LCDC_LCDFRMCFG, value);
753 /* FIFO Threshold: Use formula from data sheet */
754 value = ATMEL_LCDC_FIFO_SIZE - (2 * ATMEL_LCDC_DMA_BURST_LEN + 3);
755 lcdc_writel(sinfo, ATMEL_LCDC_FIFO, value);
757 /* Toggle LCD_MODE every frame */
758 lcdc_writel(sinfo, ATMEL_LCDC_MVAL, 0);
760 /* Disable all interrupts */
761 lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL);
762 /* Enable FIFO & DMA errors */
763 lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI | ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI);
765 /* ...wait for DMA engine to become idle... */
766 while (lcdc_readl(sinfo, ATMEL_LCDC_DMACON) & ATMEL_LCDC_DMABUSY)
769 atmel_lcdfb_start(sinfo);
771 dev_dbg(info->device, " * DONE\n");
776 static inline unsigned int chan_to_field(unsigned int chan, const struct fb_bitfield *bf)
779 chan >>= 16 - bf->length;
780 return chan << bf->offset;
784 * atmel_lcdfb_setcolreg - Optional function. Sets a color register.
785 * @regno: Which register in the CLUT we are programming
786 * @red: The red value which can be up to 16 bits wide
787 * @green: The green value which can be up to 16 bits wide
788 * @blue: The blue value which can be up to 16 bits wide.
789 * @transp: If supported the alpha value which can be up to 16 bits wide.
790 * @info: frame buffer info structure
792 * Set a single color register. The values supplied have a 16 bit
793 * magnitude which needs to be scaled in this function for the hardware.
794 * Things to take into consideration are how many color registers, if
795 * any, are supported with the current color visual. With truecolor mode
796 * no color palettes are supported. Here a pseudo palette is created
797 * which we store the value in pseudo_palette in struct fb_info. For
798 * pseudocolor mode we have a limited color palette. To deal with this
799 * we can program what color is displayed for a particular pixel value.
800 * DirectColor is similar in that we can program each color field. If
801 * we have a static colormap we don't need to implement this function.
803 * Returns negative errno on error, or zero on success. In an
804 * ideal world, this would have been the case, but as it turns
805 * out, the other drivers return 1 on failure, so that's what
808 static int atmel_lcdfb_setcolreg(unsigned int regno, unsigned int red,
809 unsigned int green, unsigned int blue,
810 unsigned int transp, struct fb_info *info)
812 struct atmel_lcdfb_info *sinfo = info->par;
813 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
818 if (info->var.grayscale)
819 red = green = blue = (19595 * red + 38470 * green
820 + 7471 * blue) >> 16;
822 switch (info->fix.visual) {
823 case FB_VISUAL_TRUECOLOR:
825 pal = info->pseudo_palette;
827 val = chan_to_field(red, &info->var.red);
828 val |= chan_to_field(green, &info->var.green);
829 val |= chan_to_field(blue, &info->var.blue);
836 case FB_VISUAL_PSEUDOCOLOR:
838 if (sinfo->config->have_intensity_bit) {
839 /* old style I+BGR:555 */
840 val = ((red >> 11) & 0x001f);
841 val |= ((green >> 6) & 0x03e0);
842 val |= ((blue >> 1) & 0x7c00);
845 * TODO: intensity bit. Maybe something like
846 * ~(red[10] ^ green[10] ^ blue[10]) & 1
849 /* new style BGR:565 / RGB:565 */
850 if (pdata->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) {
851 val = ((blue >> 11) & 0x001f);
852 val |= ((red >> 0) & 0xf800);
854 val = ((red >> 11) & 0x001f);
855 val |= ((blue >> 0) & 0xf800);
858 val |= ((green >> 5) & 0x07e0);
861 lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val);
866 case FB_VISUAL_MONO01:
868 val = (regno == 0) ? 0x00 : 0x1F;
869 lcdc_writel(sinfo, ATMEL_LCDC_LUT(regno), val);
879 static int atmel_lcdfb_pan_display(struct fb_var_screeninfo *var,
880 struct fb_info *info)
882 dev_dbg(info->device, "%s\n", __func__);
884 atmel_lcdfb_update_dma(info, var);
889 static int atmel_lcdfb_blank(int blank_mode, struct fb_info *info)
891 struct atmel_lcdfb_info *sinfo = info->par;
893 switch (blank_mode) {
894 case FB_BLANK_UNBLANK:
895 case FB_BLANK_NORMAL:
896 atmel_lcdfb_start(sinfo);
898 case FB_BLANK_VSYNC_SUSPEND:
899 case FB_BLANK_HSYNC_SUSPEND:
901 case FB_BLANK_POWERDOWN:
902 atmel_lcdfb_stop(sinfo);
908 /* let fbcon do a soft blank for us */
909 return ((blank_mode == FB_BLANK_NORMAL) ? 1 : 0);
912 static struct fb_ops atmel_lcdfb_ops = {
913 .owner = THIS_MODULE,
914 .fb_check_var = atmel_lcdfb_check_var,
915 .fb_set_par = atmel_lcdfb_set_par,
916 .fb_setcolreg = atmel_lcdfb_setcolreg,
917 .fb_blank = atmel_lcdfb_blank,
918 .fb_pan_display = atmel_lcdfb_pan_display,
919 .fb_fillrect = cfb_fillrect,
920 .fb_copyarea = cfb_copyarea,
921 .fb_imageblit = cfb_imageblit,
924 static irqreturn_t atmel_lcdfb_interrupt(int irq, void *dev_id)
926 struct fb_info *info = dev_id;
927 struct atmel_lcdfb_info *sinfo = info->par;
930 status = lcdc_readl(sinfo, ATMEL_LCDC_ISR);
931 if (status & ATMEL_LCDC_UFLWI) {
932 dev_warn(info->device, "FIFO underflow %#x\n", status);
933 /* reset DMA and FIFO to avoid screen shifting */
934 schedule_work(&sinfo->task);
936 lcdc_writel(sinfo, ATMEL_LCDC_ICR, status);
941 * LCD controller task (to reset the LCD)
943 static void atmel_lcdfb_task(struct work_struct *work)
945 struct atmel_lcdfb_info *sinfo =
946 container_of(work, struct atmel_lcdfb_info, task);
948 atmel_lcdfb_reset(sinfo);
951 static int __init atmel_lcdfb_init_fbinfo(struct atmel_lcdfb_info *sinfo)
953 struct fb_info *info = sinfo->info;
956 info->var.activate |= FB_ACTIVATE_FORCE | FB_ACTIVATE_NOW;
958 dev_info(info->device,
959 "%luKiB frame buffer at %08lx (mapped at %p)\n",
960 (unsigned long)info->fix.smem_len / 1024,
961 (unsigned long)info->fix.smem_start,
964 /* Allocate colormap */
965 ret = fb_alloc_cmap(&info->cmap, 256, 0);
967 dev_err(info->device, "Alloc color map failed\n");
972 static void atmel_lcdfb_start_clock(struct atmel_lcdfb_info *sinfo)
974 clk_prepare_enable(sinfo->bus_clk);
975 clk_prepare_enable(sinfo->lcdc_clk);
978 static void atmel_lcdfb_stop_clock(struct atmel_lcdfb_info *sinfo)
980 clk_disable_unprepare(sinfo->bus_clk);
981 clk_disable_unprepare(sinfo->lcdc_clk);
985 static const struct of_device_id atmel_lcdfb_dt_ids[] = {
986 { .compatible = "atmel,at91sam9261-lcdc" , .data = &at91sam9261_config, },
987 { .compatible = "atmel,at91sam9263-lcdc" , .data = &at91sam9263_config, },
988 { .compatible = "atmel,at91sam9g10-lcdc" , .data = &at91sam9g10_config, },
989 { .compatible = "atmel,at91sam9g45-lcdc" , .data = &at91sam9g45_config, },
990 { .compatible = "atmel,at91sam9g45es-lcdc" , .data = &at91sam9g45es_config, },
991 { .compatible = "atmel,at91sam9rl-lcdc" , .data = &at91sam9rl_config, },
992 { .compatible = "atmel,at32ap-lcdc" , .data = &at32ap_config, },
996 MODULE_DEVICE_TABLE(of, atmel_lcdfb_dt_ids);
998 static const char *atmel_lcdfb_wiring_modes[] = {
999 [ATMEL_LCDC_WIRING_BGR] = "BRG",
1000 [ATMEL_LCDC_WIRING_RGB] = "RGB",
1003 const int atmel_lcdfb_get_of_wiring_modes(struct device_node *np)
1008 err = of_property_read_string(np, "atmel,lcd-wiring-mode", &mode);
1010 return ATMEL_LCDC_WIRING_BGR;
1012 for (i = 0; i < ARRAY_SIZE(atmel_lcdfb_wiring_modes); i++)
1013 if (!strcasecmp(mode, atmel_lcdfb_wiring_modes[i]))
1019 static void atmel_lcdfb_power_control_gpio(struct atmel_lcdfb_pdata *pdata, int on)
1021 struct atmel_lcdfb_power_ctrl_gpio *og;
1023 list_for_each_entry(og, &pdata->pwr_gpios, list)
1024 gpio_set_value(og->gpio, on);
1027 static int atmel_lcdfb_of_init(struct atmel_lcdfb_info *sinfo)
1029 struct fb_info *info = sinfo->info;
1030 struct atmel_lcdfb_pdata *pdata = &sinfo->pdata;
1031 struct fb_var_screeninfo *var = &info->var;
1032 struct device *dev = &sinfo->pdev->dev;
1033 struct device_node *np =dev->of_node;
1034 struct device_node *display_np;
1035 struct device_node *timings_np;
1036 struct display_timings *timings;
1037 enum of_gpio_flags flags;
1038 struct atmel_lcdfb_power_ctrl_gpio *og;
1039 bool is_gpio_power = false;
1043 sinfo->config = (struct atmel_lcdfb_config*)
1044 of_match_device(atmel_lcdfb_dt_ids, dev)->data;
1046 display_np = of_parse_phandle(np, "display", 0);
1048 dev_err(dev, "failed to find display phandle\n");
1052 ret = of_property_read_u32(display_np, "bits-per-pixel", &var->bits_per_pixel);
1054 dev_err(dev, "failed to get property bits-per-pixel\n");
1055 goto put_display_node;
1058 ret = of_property_read_u32(display_np, "atmel,guard-time", &pdata->guard_time);
1060 dev_err(dev, "failed to get property atmel,guard-time\n");
1061 goto put_display_node;
1064 ret = of_property_read_u32(display_np, "atmel,lcdcon2", &pdata->default_lcdcon2);
1066 dev_err(dev, "failed to get property atmel,lcdcon2\n");
1067 goto put_display_node;
1070 ret = of_property_read_u32(display_np, "atmel,dmacon", &pdata->default_dmacon);
1072 dev_err(dev, "failed to get property bits-per-pixel\n");
1073 goto put_display_node;
1076 INIT_LIST_HEAD(&pdata->pwr_gpios);
1078 for (i = 0; i < of_gpio_named_count(display_np, "atmel,power-control-gpio"); i++) {
1079 gpio = of_get_named_gpio_flags(display_np, "atmel,power-control-gpio",
1084 og = devm_kzalloc(dev, sizeof(*og), GFP_KERNEL);
1086 goto put_display_node;
1089 og->active_low = flags & OF_GPIO_ACTIVE_LOW;
1090 is_gpio_power = true;
1091 ret = devm_gpio_request(dev, gpio, "lcd-power-control-gpio");
1093 dev_err(dev, "request gpio %d failed\n", gpio);
1094 goto put_display_node;
1097 ret = gpio_direction_output(gpio, og->active_low);
1099 dev_err(dev, "set direction output gpio %d failed\n", gpio);
1100 goto put_display_node;
1102 list_add(&og->list, &pdata->pwr_gpios);
1106 pdata->atmel_lcdfb_power_control = atmel_lcdfb_power_control_gpio;
1108 ret = atmel_lcdfb_get_of_wiring_modes(display_np);
1110 dev_err(dev, "invalid atmel,lcd-wiring-mode\n");
1111 goto put_display_node;
1113 pdata->lcd_wiring_mode = ret;
1115 pdata->lcdcon_is_backlight = of_property_read_bool(display_np, "atmel,lcdcon-backlight");
1116 pdata->lcdcon_pol_negative = of_property_read_bool(display_np, "atmel,lcdcon-backlight-inverted");
1118 timings = of_get_display_timings(display_np);
1120 dev_err(dev, "failed to get display timings\n");
1122 goto put_display_node;
1125 timings_np = of_find_node_by_name(display_np, "display-timings");
1127 dev_err(dev, "failed to find display-timings node\n");
1129 goto put_display_node;
1132 for (i = 0; i < of_get_child_count(timings_np); i++) {
1133 struct videomode vm;
1134 struct fb_videomode fb_vm;
1136 ret = videomode_from_timings(timings, &vm, i);
1138 goto put_timings_node;
1139 ret = fb_videomode_from_videomode(&vm, &fb_vm);
1141 goto put_timings_node;
1143 fb_add_videomode(&fb_vm, &info->modelist);
1149 of_node_put(timings_np);
1151 of_node_put(display_np);
1155 static int atmel_lcdfb_of_init(struct atmel_lcdfb_info *sinfo)
1161 static int __init atmel_lcdfb_probe(struct platform_device *pdev)
1163 struct device *dev = &pdev->dev;
1164 struct fb_info *info;
1165 struct atmel_lcdfb_info *sinfo;
1166 struct atmel_lcdfb_pdata *pdata = NULL;
1167 struct resource *regs = NULL;
1168 struct resource *map = NULL;
1169 struct fb_modelist *modelist;
1172 dev_dbg(dev, "%s BEGIN\n", __func__);
1175 info = framebuffer_alloc(sizeof(struct atmel_lcdfb_info), dev);
1177 dev_err(dev, "cannot allocate memory\n");
1185 INIT_LIST_HEAD(&info->modelist);
1187 if (pdev->dev.of_node) {
1188 ret = atmel_lcdfb_of_init(sinfo);
1191 } else if (dev_get_platdata(dev)) {
1192 struct fb_monspecs *monspecs;
1195 pdata = dev_get_platdata(dev);
1196 monspecs = pdata->default_monspecs;
1197 sinfo->pdata = *pdata;
1199 for (i = 0; i < monspecs->modedb_len; i++)
1200 fb_add_videomode(&monspecs->modedb[i], &info->modelist);
1202 sinfo->config = atmel_lcdfb_get_config(pdev);
1204 info->var.bits_per_pixel = pdata->default_bpp ? pdata->default_bpp : 16;
1205 memcpy(&info->monspecs, pdata->default_monspecs, sizeof(info->monspecs));
1207 dev_err(dev, "cannot get default configuration\n");
1214 sinfo->reg_lcd = devm_regulator_get(&pdev->dev, "lcd");
1215 if (IS_ERR(sinfo->reg_lcd))
1216 sinfo->reg_lcd = NULL;
1218 info->flags = ATMEL_LCDFB_FBINFO_DEFAULT;
1219 info->pseudo_palette = sinfo->pseudo_palette;
1220 info->fbops = &atmel_lcdfb_ops;
1222 info->fix = atmel_lcdfb_fix;
1223 strcpy(info->fix.id, sinfo->pdev->name);
1225 /* Enable LCDC Clocks */
1226 sinfo->bus_clk = clk_get(dev, "hclk");
1227 if (IS_ERR(sinfo->bus_clk)) {
1228 ret = PTR_ERR(sinfo->bus_clk);
1231 sinfo->lcdc_clk = clk_get(dev, "lcdc_clk");
1232 if (IS_ERR(sinfo->lcdc_clk)) {
1233 ret = PTR_ERR(sinfo->lcdc_clk);
1236 atmel_lcdfb_start_clock(sinfo);
1238 modelist = list_first_entry(&info->modelist,
1239 struct fb_modelist, list);
1240 fb_videomode_to_var(&info->var, &modelist->mode);
1242 atmel_lcdfb_check_var(&info->var, info);
1244 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1246 dev_err(dev, "resources unusable\n");
1251 sinfo->irq_base = platform_get_irq(pdev, 0);
1252 if (sinfo->irq_base < 0) {
1253 dev_err(dev, "unable to get irq\n");
1254 ret = sinfo->irq_base;
1258 /* Initialize video memory */
1259 map = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1261 /* use a pre-allocated memory buffer */
1262 info->fix.smem_start = map->start;
1263 info->fix.smem_len = resource_size(map);
1264 if (!request_mem_region(info->fix.smem_start,
1265 info->fix.smem_len, pdev->name)) {
1270 info->screen_base = ioremap(info->fix.smem_start, info->fix.smem_len);
1271 if (!info->screen_base) {
1273 goto release_intmem;
1277 * Don't clear the framebuffer -- someone may have set
1278 * up a splash image.
1281 /* allocate memory buffer */
1282 ret = atmel_lcdfb_alloc_video_memory(sinfo);
1284 dev_err(dev, "cannot allocate framebuffer: %d\n", ret);
1289 /* LCDC registers */
1290 info->fix.mmio_start = regs->start;
1291 info->fix.mmio_len = resource_size(regs);
1293 if (!request_mem_region(info->fix.mmio_start,
1294 info->fix.mmio_len, pdev->name)) {
1299 sinfo->mmio = ioremap(info->fix.mmio_start, info->fix.mmio_len);
1301 dev_err(dev, "cannot map LCDC registers\n");
1306 /* Initialize PWM for contrast or backlight ("off") */
1307 init_contrast(sinfo);
1310 ret = request_irq(sinfo->irq_base, atmel_lcdfb_interrupt, 0, pdev->name, info);
1312 dev_err(dev, "request_irq failed: %d\n", ret);
1316 /* Some operations on the LCDC might sleep and
1317 * require a preemptible task context */
1318 INIT_WORK(&sinfo->task, atmel_lcdfb_task);
1320 ret = atmel_lcdfb_init_fbinfo(sinfo);
1322 dev_err(dev, "init fbinfo failed: %d\n", ret);
1323 goto unregister_irqs;
1326 ret = atmel_lcdfb_set_par(info);
1328 dev_err(dev, "set par failed: %d\n", ret);
1329 goto unregister_irqs;
1332 dev_set_drvdata(dev, info);
1335 * Tell the world that we're ready to go
1337 ret = register_framebuffer(info);
1339 dev_err(dev, "failed to register framebuffer device: %d\n", ret);
1343 /* Power up the LCDC screen */
1344 atmel_lcdfb_power_control(sinfo, 1);
1346 dev_info(dev, "fb%d: Atmel LCDC at 0x%08lx (mapped at %p), irq %d\n",
1347 info->node, info->fix.mmio_start, sinfo->mmio, sinfo->irq_base);
1352 dev_set_drvdata(dev, NULL);
1353 fb_dealloc_cmap(&info->cmap);
1355 cancel_work_sync(&sinfo->task);
1356 free_irq(sinfo->irq_base, info);
1358 exit_backlight(sinfo);
1359 iounmap(sinfo->mmio);
1361 release_mem_region(info->fix.mmio_start, info->fix.mmio_len);
1364 iounmap(info->screen_base);
1366 atmel_lcdfb_free_video_memory(sinfo);
1370 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1372 atmel_lcdfb_stop_clock(sinfo);
1373 clk_put(sinfo->lcdc_clk);
1375 clk_put(sinfo->bus_clk);
1377 framebuffer_release(info);
1379 dev_dbg(dev, "%s FAILED\n", __func__);
1383 static int __exit atmel_lcdfb_remove(struct platform_device *pdev)
1385 struct device *dev = &pdev->dev;
1386 struct fb_info *info = dev_get_drvdata(dev);
1387 struct atmel_lcdfb_info *sinfo;
1388 struct atmel_lcdfb_pdata *pdata;
1390 if (!info || !info->par)
1393 pdata = &sinfo->pdata;
1395 cancel_work_sync(&sinfo->task);
1396 exit_backlight(sinfo);
1397 atmel_lcdfb_power_control(sinfo, 0);
1398 unregister_framebuffer(info);
1399 atmel_lcdfb_stop_clock(sinfo);
1400 clk_put(sinfo->lcdc_clk);
1401 clk_put(sinfo->bus_clk);
1402 fb_dealloc_cmap(&info->cmap);
1403 free_irq(sinfo->irq_base, info);
1404 iounmap(sinfo->mmio);
1405 release_mem_region(info->fix.mmio_start, info->fix.mmio_len);
1406 if (platform_get_resource(pdev, IORESOURCE_MEM, 1)) {
1407 iounmap(info->screen_base);
1408 release_mem_region(info->fix.smem_start, info->fix.smem_len);
1410 atmel_lcdfb_free_video_memory(sinfo);
1413 framebuffer_release(info);
1420 static int atmel_lcdfb_suspend(struct platform_device *pdev, pm_message_t mesg)
1422 struct fb_info *info = platform_get_drvdata(pdev);
1423 struct atmel_lcdfb_info *sinfo = info->par;
1426 * We don't want to handle interrupts while the clock is
1427 * stopped. It may take forever.
1429 lcdc_writel(sinfo, ATMEL_LCDC_IDR, ~0UL);
1431 sinfo->saved_lcdcon = lcdc_readl(sinfo, ATMEL_LCDC_CONTRAST_CTR);
1432 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, 0);
1433 atmel_lcdfb_power_control(sinfo, 0);
1434 atmel_lcdfb_stop(sinfo);
1435 atmel_lcdfb_stop_clock(sinfo);
1440 static int atmel_lcdfb_resume(struct platform_device *pdev)
1442 struct fb_info *info = platform_get_drvdata(pdev);
1443 struct atmel_lcdfb_info *sinfo = info->par;
1445 atmel_lcdfb_start_clock(sinfo);
1446 atmel_lcdfb_start(sinfo);
1447 atmel_lcdfb_power_control(sinfo, 1);
1448 lcdc_writel(sinfo, ATMEL_LCDC_CONTRAST_CTR, sinfo->saved_lcdcon);
1450 /* Enable FIFO & DMA errors */
1451 lcdc_writel(sinfo, ATMEL_LCDC_IER, ATMEL_LCDC_UFLWI
1452 | ATMEL_LCDC_OWRI | ATMEL_LCDC_MERI);
1458 #define atmel_lcdfb_suspend NULL
1459 #define atmel_lcdfb_resume NULL
1462 static struct platform_driver atmel_lcdfb_driver = {
1463 .remove = __exit_p(atmel_lcdfb_remove),
1464 .suspend = atmel_lcdfb_suspend,
1465 .resume = atmel_lcdfb_resume,
1466 .id_table = atmel_lcdfb_devtypes,
1468 .name = "atmel_lcdfb",
1469 .owner = THIS_MODULE,
1470 .of_match_table = of_match_ptr(atmel_lcdfb_dt_ids),
1474 module_platform_driver_probe(atmel_lcdfb_driver, atmel_lcdfb_probe);
1476 MODULE_DESCRIPTION("AT91/AT32 LCD Controller framebuffer driver");
1477 MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");
1478 MODULE_LICENSE("GPL");