linux-kernel - [PATCH V2 5/8] remoteproc: imx

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Date:   Tue, 30 Mar 2021 17:12:51 +0800
From:   peng.fan@....nxp.com
To:     ohad@...ery.com, bjorn.andersson@...aro.org,
        mathieu.poirier@...aro.org, o.rempel@...gutronix.de,
        robh+dt@...nel.org, devicetree@...r.kernel.org
Cc:     shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-remoteproc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Peng Fan <peng.fan@....com>
Subject: [PATCH V2 5/8] remoteproc: imx_rproc: parse fsl,auto-boot

From: Peng Fan <peng.fan@....com>

Parse fsl,auto-boot to indicate whether need remoteproc framework
auto boot or not.

When remote processor is booted before Linux Kernel up, do not parse
fsl,auto-boot. So add an entry to store the working mode of remote
processor. Currently only IMX_RPROC_NORMAL, IMX_RPROC_EARLY_BOOT.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/remoteproc/imx_rproc.c | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index ca17f520d904..c576e12d3817 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -83,6 +83,16 @@ struct imx_rproc_dcfg {
 	size_t				att_size;
 };
 
+enum imx_rproc_mode {
+	/* Linux load/kick remote core */
+	IMX_RPROC_NORMAL,
+	/*
+	 * remote core booted before kicking Linux, and remote core
+	 * could be stopped & restarted by Linux
+	 */
+	IMX_RPROC_EARLY_BOOT,
+};
+
 struct imx_rproc {
 	struct device			*dev;
 	struct regmap			*regmap;
@@ -96,6 +106,7 @@ struct imx_rproc {
 	struct work_struct		rproc_work;
 	struct workqueue_struct		*workqueue;
 	void __iomem			*rsc_table;
+	enum imx_rproc_mode		mode;
 };
 
 static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
@@ -565,14 +576,18 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
 	int ret;
 	u32 val;
 
+	priv->mode = IMX_RPROC_NORMAL;
+
 	ret = regmap_read(priv->regmap, dcfg->src_reg, &val);
 	if (ret) {
 		dev_err(dev, "Failed to read src\n");
 		return ret;
 	}
 
-	if (!(val & dcfg->src_stop))
+	if (!(val & dcfg->src_stop)) {
+		priv->mode = IMX_RPROC_EARLY_BOOT;
 		priv->rproc->state = RPROC_DETACHED;
+	}
 
 	return 0;
 }
@@ -654,6 +669,9 @@ static int imx_rproc_probe(struct platform_device *pdev)
 
 	INIT_WORK(&priv->rproc_work, imx_rproc_vq_work);
 
+	if (priv->mode == IMX_RPROC_NORMAL)
+		rproc->auto_boot = of_property_read_bool(np, "fsl,auto-boot");
+
 	ret = rproc_add(rproc);
 	if (ret) {
 		dev_err(dev, "rproc_add failed\n");
-- 
2.30.0