Merge "i2c: i2c-msm-geni: Selectively disable DMA and operate in FIFO mode" (ffc71e9c) · Commits · e / devices / android_kernel_fairphone_FP5

drivers/i2c/busses/i2c-msm-geni.c

+13 −1

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-only
		/*
		* Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
		* Copyright (c) 2017-2021, The Linux Foundation. All rights reserved.
		*/

		#include <linux/clk.h>
		@@ -132,6 +132,7 @@ struct geni_i2c_dev {
		bool req_chan;
		bool first_resume;
		bool gpi_reset;
		bool disable_dma_mode;
		};

		static struct geni_i2c_dev *gi2c_dev_dbg[MAX_SE];
		@@ -1030,6 +1031,14 @@ static int geni_i2c_xfer(struct i2c_adapter *adap,
		qcom_geni_i2c_calc_timeout(gi2c);
		mode = msgs[i].len > 32 ? SE_DMA : FIFO_MODE;

		/* Complete the transfer in FIFO mode if DMA mode
		* is not supported for some Automotive platform.
		*/
		if (gi2c->disable_dma_mode) {
		GENI_SE_DBG(gi2c->ipcl, false, gi2c->dev,
		"Disable DMA mode\n");
		mode = FIFO_MODE;
		}
		ret = geni_se_select_mode(gi2c->base, mode);
		if (ret) {
		dev_err(gi2c->dev, "%s: Error mode init %d:%d:%d\n",
		@@ -1283,6 +1292,9 @@ static int geni_i2c_probe(struct platform_device *pdev)
		return ret;
		}

		gi2c->disable_dma_mode = of_property_read_bool(pdev->dev.of_node,
		"qcom,disable-dma");

		gi2c->irq = platform_get_irq(pdev, 0);
		if (gi2c->irq < 0)
		return gi2c->irq;