linux-kernel - [PATCH v5 3/3] dmaengine: imx-sdma: Add i2c dma support

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Date: Fri, 19 Apr 2024 11:07:29 -0400
From: Frank Li <Frank.Li@....com>
To: vkoul@...nel.org
Cc: Frank.Li@....com,
	conor+dt@...nel.org,
	devicetree@...r.kernel.org,
	dmaengine@...r.kernel.org,
	festevam@...il.com,
	imx@...ts.linux.dev,
	joy.zou@....com,
	kernel@...gutronix.de,
	krzysztof.kozlowski+dt@...aro.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-imx@....com,
	linux-kernel@...r.kernel.org,
	robh@...nel.org,
	s.hauer@...gutronix.de,
	shawnguo@...nel.org
Subject: [PATCH v5 3/3] dmaengine: imx-sdma: Add i2c dma support

From: Robin Gong <yibin.gong@....com>

New sdma script (sdma-6q: v3.6, sdma-7d: v4.6) support i2c at imx8mp and
imx6ull. So add I2C dma support.

Signed-off-by: Robin Gong <yibin.gong@....com>
Acked-by: Clark Wang <xiaoning.wang@....com>
Reviewed-by: Joy Zou <joy.zou@....com>
Reviewed-by: Daniel Baluta <daniel.baluta@....com>
Signed-off-by: Frank Li <Frank.Li@....com>
---

Notes:
    Change from v1 to v2
    
    - remove ccb_phy from struct sdma_engine
    - add i2c test platform and sdma script version informaiton at commit
      message.

 drivers/dma/imx-sdma.c      | 7 +++++++
 include/linux/dma/imx-dma.h | 1 +
 2 files changed, 8 insertions(+)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 4a4d44ed03c8b..003e1580b9023 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -251,6 +251,8 @@ struct sdma_script_start_addrs {
 	s32 sai_2_mcu_addr;
 	s32 uart_2_mcu_rom_addr;
 	s32 uartsh_2_mcu_rom_addr;
+	s32 i2c_2_mcu_addr;
+	s32 mcu_2_i2c_addr;
 	/* End of v3 array */
 	union { s32 v3_end; s32 mcu_2_zqspi_addr; };
 	/* End of v4 array */
@@ -1082,6 +1084,11 @@ static int sdma_get_pc(struct sdma_channel *sdmac,
 		per_2_emi = sdma->script_addrs->sai_2_mcu_addr;
 		emi_2_per = sdma->script_addrs->mcu_2_sai_addr;
 		break;
+	case IMX_DMATYPE_I2C:
+		per_2_emi = sdma->script_addrs->i2c_2_mcu_addr;
+		emi_2_per = sdma->script_addrs->mcu_2_i2c_addr;
+		sdmac->is_ram_script = true;
+		break;
 	case IMX_DMATYPE_HDMI:
 		emi_2_per = sdma->script_addrs->hdmi_dma_addr;
 		sdmac->is_ram_script = true;
diff --git a/include/linux/dma/imx-dma.h b/include/linux/dma/imx-dma.h
index cfec5f946e237..76a8de9ae1517 100644
--- a/include/linux/dma/imx-dma.h
+++ b/include/linux/dma/imx-dma.h
@@ -41,6 +41,7 @@ enum sdma_peripheral_type {
 	IMX_DMATYPE_SAI,	/* SAI */
 	IMX_DMATYPE_MULTI_SAI,	/* MULTI FIFOs For Audio */
 	IMX_DMATYPE_HDMI,       /* HDMI Audio */
+	IMX_DMATYPE_I2C,	/* I2C */
 };
 
 enum imx_dma_prio {
-- 
2.34.1