[PATCH V2 5/8] remoteproc: imx_rproc: parse fsl,auto-boot

[peng . fan]

From: Peng Fan <peng....@nxp.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....@nxp.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