X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fdma%2Fapbh_dma.c;h=a6dc9351148f905869012bd7f48b11be98fe63cf;hb=1fc4f80495a494f8277987fa0f3976d1ffe81dc7;hp=96d4c9bb19960c943fa0666768e30212d996f139;hpb=c2120fbfbc4d1f6953228f86be8bdbf38bacfdab;p=u-boot

diff --git a/drivers/dma/apbh_dma.c b/drivers/dma/apbh_dma.c
index 96d4c9bb19..a6dc935114 100644
--- a/drivers/dma/apbh_dma.c
+++ b/drivers/dma/apbh_dma.c
@@ -215,7 +215,7 @@ static int mxs_dma_reset(int channel)
 #if defined(CONFIG_MX23)
 	uint32_t setreg = (uint32_t)(&apbh_regs->hw_apbh_ctrl0_set);
 	uint32_t offset = APBH_CTRL0_RESET_CHANNEL_OFFSET;
-#elif (defined(CONFIG_MX28) || defined(CONFIG_MX6))
+#elif (defined(CONFIG_MX28) || defined(CONFIG_MX6) || defined(CONFIG_MX7))
 	uint32_t setreg = (uint32_t)(&apbh_regs->hw_apbh_channel_ctrl_set);
 	uint32_t offset = APBH_CHANNEL_CTRL_RESET_CHANNEL_OFFSET;
 #endif
@@ -544,6 +544,28 @@ int mxs_dma_go(int chan)
 	return ret;
 }
 
+/*
+ * Execute a continuously running circular DMA descriptor.
+ * NOTE: This is not intended for general use, but rather
+ *	 for the LCD driver in Smart-LCD mode. It allows
+ *	 continuous triggering of the RUN bit there.
+ */
+void mxs_dma_circ_start(int chan, struct mxs_dma_desc *pdesc)
+{
+	struct mxs_apbh_regs *apbh_regs =
+		(struct mxs_apbh_regs *)MXS_APBH_BASE;
+
+	mxs_dma_flush_desc(pdesc);
+
+	mxs_dma_enable_irq(chan, 1);
+
+	writel(mxs_dma_cmd_address(pdesc),
+		&apbh_regs->ch[chan].hw_apbh_ch_nxtcmdar);
+	writel(1, &apbh_regs->ch[chan].hw_apbh_ch_sema);
+	writel(1 << (chan + APBH_CTRL0_CLKGATE_CHANNEL_OFFSET),
+		&apbh_regs->hw_apbh_ctrl0_clr);
+}
+
 /*
  * Initialize the DMA hardware
  */