OMAP2/3: DMA errata correction

This errata is valid for:
OMAP2420 Errata 1.85 Impacts all 2420 ES rev
OMAP2430 Errata 1.10 Impacts only ES1.0
Description: DMA may hang when several channels are used in parallel
OMAP3430: Not impacted, so remove the errata fix for omap3

Fixed issue reported on cpu_is_omap24xx check reported by Nishant Kamat

Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Reviewed-by: Nishant Kamat <nskamat@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index 7677a4a..e3ac94f 100644 (file)
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -946,7 +946,9 @@ void omap_start_dma(int lch)
 
                        cur_lch = next_lch;
                } while (next_lch != -1);
-       } else if (cpu_class_is_omap2()) {
+       } else if (cpu_is_omap242x() ||
+               (cpu_is_omap243x() &&  omap_type() <= OMAP2430_REV_ES1_0)) {
+
                /* Errata: Need to write lch even if not using chaining */
                dma_write(lch, CLNK_CTRL(lch));
        }