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path: root/drivers/video/atmel_lcdfb.c
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Diffstat (limited to 'drivers/video/atmel_lcdfb.c')
-rw-r--r--drivers/video/atmel_lcdfb.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c
index 2830ffd72976..d5e801076d33 100644
--- a/drivers/video/atmel_lcdfb.c
+++ b/drivers/video/atmel_lcdfb.c
@@ -484,6 +484,7 @@ static int atmel_lcdfb_set_par(struct fb_info *info)
484 unsigned long value; 484 unsigned long value;
485 unsigned long clk_value_khz; 485 unsigned long clk_value_khz;
486 unsigned long bits_per_line; 486 unsigned long bits_per_line;
487 unsigned long pix_factor = 2;
487 488
488 might_sleep(); 489 might_sleep();
489 490
@@ -516,20 +517,24 @@ static int atmel_lcdfb_set_par(struct fb_info *info)
516 /* Now, the LCDC core... */ 517 /* Now, the LCDC core... */
517 518
518 /* Set pixel clock */ 519 /* Set pixel clock */
520 if (cpu_is_at91sam9g45() && !cpu_is_at91sam9g45es())
521 pix_factor = 1;
522
519 clk_value_khz = clk_get_rate(sinfo->lcdc_clk) / 1000; 523 clk_value_khz = clk_get_rate(sinfo->lcdc_clk) / 1000;
520 524
521 value = DIV_ROUND_UP(clk_value_khz, PICOS2KHZ(info->var.pixclock)); 525 value = DIV_ROUND_UP(clk_value_khz, PICOS2KHZ(info->var.pixclock));
522 526
523 if (value < 2) { 527 if (value < pix_factor) {
524 dev_notice(info->device, "Bypassing pixel clock divider\n"); 528 dev_notice(info->device, "Bypassing pixel clock divider\n");
525 lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1, ATMEL_LCDC_BYPASS); 529 lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1, ATMEL_LCDC_BYPASS);
526 } else { 530 } else {
527 value = (value / 2) - 1; 531 value = (value / pix_factor) - 1;
528 dev_dbg(info->device, " * programming CLKVAL = 0x%08lx\n", 532 dev_dbg(info->device, " * programming CLKVAL = 0x%08lx\n",
529 value); 533 value);
530 lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1, 534 lcdc_writel(sinfo, ATMEL_LCDC_LCDCON1,
531 value << ATMEL_LCDC_CLKVAL_OFFSET); 535 value << ATMEL_LCDC_CLKVAL_OFFSET);
532 info->var.pixclock = KHZ2PICOS(clk_value_khz / (2 * (value + 1))); 536 info->var.pixclock =
537 KHZ2PICOS(clk_value_khz / (pix_factor * (value + 1)));
533 dev_dbg(info->device, " updated pixclk: %lu KHz\n", 538 dev_dbg(info->device, " updated pixclk: %lu KHz\n",
534 PICOS2KHZ(info->var.pixclock)); 539 PICOS2KHZ(info->var.pixclock));
535 } 540 }