diff mbox series

[V3,6/8] remoteproc: imx_rproc: initial support for mutilple start/stop method

Message ID 1617846898-13662-7-git-send-email-peng.fan@oss.nxp.com
State New
Headers show
Series remoteproc: imx_rproc: support i.MX7ULP/8MN/8MP | expand

Commit Message

Peng Fan (OSS) April 8, 2021, 1:54 a.m. UTC 
From: Peng Fan <peng.fan@nxp.com>


Add three methods IMX_RPROC_NONE(no need start/stop), IMX_RPROC_MMIO
(start/stop through mmio) and IMX_RPROC_SMC(start/stop through ARM SMCCC).

The current SoCs supported are all using IMX_RPROC_MMIO, add a restrict
in probe that only SoCs using IMX_RPROC_MMIO needs syscon regmap to
access registers.

Signed-off-by: Peng Fan <peng.fan@nxp.com>

---
 drivers/remoteproc/imx_rproc.c | 50 +++++++++++++++++++++++-----------
 1 file changed, 34 insertions(+), 16 deletions(-)

-- 
2.30.0

Comments

Mathieu Poirier April 13, 2021, 5:45 p.m. UTC | #1 
On Thu, Apr 08, 2021 at 09:54:56AM +0800, peng.fan@oss.nxp.com wrote:
> From: Peng Fan <peng.fan@nxp.com>

> 

> Add three methods IMX_RPROC_NONE(no need start/stop), IMX_RPROC_MMIO

> (start/stop through mmio) and IMX_RPROC_SMC(start/stop through ARM SMCCC).

> 

> The current SoCs supported are all using IMX_RPROC_MMIO, add a restrict

> in probe that only SoCs using IMX_RPROC_MMIO needs syscon regmap to

> access registers.

> 

> Signed-off-by: Peng Fan <peng.fan@nxp.com>

> ---

>  drivers/remoteproc/imx_rproc.c | 50 +++++++++++++++++++++++-----------

>  1 file changed, 34 insertions(+), 16 deletions(-)

> 

> diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c

> index c576e12d3817..a7fa9d7fc2d1 100644

> --- a/drivers/remoteproc/imx_rproc.c

> +++ b/drivers/remoteproc/imx_rproc.c

> @@ -74,6 +74,15 @@ struct imx_rproc_att {

>  	int flags;

>  };

>  

> +/* Remote core start/stop method */

> +enum imx_rproc_method {

> +	IMX_RPROC_NONE,

> +	/* Through syscon regmap */

> +	IMX_RPROC_MMIO,

> +	/* Through ARM SMCCC */

> +	IMX_RPROC_SMC,

> +};

> +

>  struct imx_rproc_dcfg {

>  	u32				src_reg;

>  	u32				src_mask;

> @@ -81,6 +90,7 @@ struct imx_rproc_dcfg {

>  	u32				src_stop;

>  	const struct imx_rproc_att	*att;

>  	size_t				att_size;

> +	enum imx_rproc_method		method;

>  };

>  

>  enum imx_rproc_mode {

> @@ -194,6 +204,7 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mq = {

>  	.src_stop	= IMX7D_M4_STOP,

>  	.att		= imx_rproc_att_imx8mq,

>  	.att_size	= ARRAY_SIZE(imx_rproc_att_imx8mq),

> +	.method		= IMX_RPROC_MMIO,

>  };

>  

>  static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {

> @@ -203,6 +214,7 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {

>  	.src_stop	= IMX7D_M4_STOP,

>  	.att		= imx_rproc_att_imx7d,

>  	.att_size	= ARRAY_SIZE(imx_rproc_att_imx7d),

> +	.method		= IMX_RPROC_MMIO,

>  };

>  

>  static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = {

> @@ -212,6 +224,7 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = {

>  	.src_stop	= IMX6SX_M4_STOP,

>  	.att		= imx_rproc_att_imx6sx,

>  	.att_size	= ARRAY_SIZE(imx_rproc_att_imx6sx),

> +	.method		= IMX_RPROC_MMIO,

>  };

>  

>  static int imx_rproc_start(struct rproc *rproc)

> @@ -578,15 +591,17 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)

>  

>  	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 (priv->regmap) {

> +		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)) {

> -		priv->mode = IMX_RPROC_EARLY_BOOT;

> -		priv->rproc->state = RPROC_DETACHED;

> +		if (!(val & dcfg->src_stop)) {

> +			priv->rproc->state = RPROC_DETACHED;

> +			priv->mode = IMX_RPROC_EARLY_BOOT;

> +		}

>  	}

>  

>  	return 0;

> @@ -600,16 +615,9 @@ static int imx_rproc_probe(struct platform_device *pdev)

>  	struct rproc *rproc;

>  	struct regmap_config config = { .name = "imx-rproc" };

>  	const struct imx_rproc_dcfg *dcfg;

> -	struct regmap *regmap;

> +	struct regmap *regmap = NULL;

>  	int ret;

>  

> -	regmap = syscon_regmap_lookup_by_phandle(np, "syscon");

> -	if (IS_ERR(regmap)) {

> -		dev_err(dev, "failed to find syscon\n");

> -		return PTR_ERR(regmap);

> -	}

> -	regmap_attach_dev(dev, regmap, &config);

> -

>  	/* set some other name then imx */

>  	rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops,

>  			    NULL, sizeof(*priv));

> @@ -622,6 +630,16 @@ static int imx_rproc_probe(struct platform_device *pdev)

>  		goto err_put_rproc;

>  	}

>  

> +	if (dcfg->method == IMX_RPROC_MMIO) {

> +		regmap = syscon_regmap_lookup_by_phandle(np, "syscon");

> +		if (IS_ERR(regmap)) {

> +			dev_err(dev, "failed to find syscon\n");

> +			ret = PTR_ERR(regmap);

> +			goto err_put_rproc;

> +		}

> +		regmap_attach_dev(dev, regmap, &config);

> +	}


I would move this to imx_rproc_detect_mode() and get rid of the "if
(priv->regmap)" that is there.

> +

>  	priv = rproc->priv;

>  	priv->rproc = rproc;

>  	priv->regmap = regmap;

> -- 

> 2.30.0

>
diff mbox series

Patch

diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
index c576e12d3817..a7fa9d7fc2d1 100644
--- a/drivers/remoteproc/imx_rproc.c
+++ b/drivers/remoteproc/imx_rproc.c
@@ -74,6 +74,15 @@  struct imx_rproc_att {
 	int flags;
 };
 
+/* Remote core start/stop method */
+enum imx_rproc_method {
+	IMX_RPROC_NONE,
+	/* Through syscon regmap */
+	IMX_RPROC_MMIO,
+	/* Through ARM SMCCC */
+	IMX_RPROC_SMC,
+};
+
 struct imx_rproc_dcfg {
 	u32				src_reg;
 	u32				src_mask;
@@ -81,6 +90,7 @@  struct imx_rproc_dcfg {
 	u32				src_stop;
 	const struct imx_rproc_att	*att;
 	size_t				att_size;
+	enum imx_rproc_method		method;
 };
 
 enum imx_rproc_mode {
@@ -194,6 +204,7 @@  static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mq = {
 	.src_stop	= IMX7D_M4_STOP,
 	.att		= imx_rproc_att_imx8mq,
 	.att_size	= ARRAY_SIZE(imx_rproc_att_imx8mq),
+	.method		= IMX_RPROC_MMIO,
 };
 
 static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
@@ -203,6 +214,7 @@  static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
 	.src_stop	= IMX7D_M4_STOP,
 	.att		= imx_rproc_att_imx7d,
 	.att_size	= ARRAY_SIZE(imx_rproc_att_imx7d),
+	.method		= IMX_RPROC_MMIO,
 };
 
 static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = {
@@ -212,6 +224,7 @@  static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = {
 	.src_stop	= IMX6SX_M4_STOP,
 	.att		= imx_rproc_att_imx6sx,
 	.att_size	= ARRAY_SIZE(imx_rproc_att_imx6sx),
+	.method		= IMX_RPROC_MMIO,
 };
 
 static int imx_rproc_start(struct rproc *rproc)
@@ -578,15 +591,17 @@  static int imx_rproc_detect_mode(struct imx_rproc *priv)
 
 	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 (priv->regmap) {
+		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)) {
-		priv->mode = IMX_RPROC_EARLY_BOOT;
-		priv->rproc->state = RPROC_DETACHED;
+		if (!(val & dcfg->src_stop)) {
+			priv->rproc->state = RPROC_DETACHED;
+			priv->mode = IMX_RPROC_EARLY_BOOT;
+		}
 	}
 
 	return 0;
@@ -600,16 +615,9 @@  static int imx_rproc_probe(struct platform_device *pdev)
 	struct rproc *rproc;
 	struct regmap_config config = { .name = "imx-rproc" };
 	const struct imx_rproc_dcfg *dcfg;
-	struct regmap *regmap;
+	struct regmap *regmap = NULL;
 	int ret;
 
-	regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
-	if (IS_ERR(regmap)) {
-		dev_err(dev, "failed to find syscon\n");
-		return PTR_ERR(regmap);
-	}
-	regmap_attach_dev(dev, regmap, &config);
-
 	/* set some other name then imx */
 	rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops,
 			    NULL, sizeof(*priv));
@@ -622,6 +630,16 @@  static int imx_rproc_probe(struct platform_device *pdev)
 		goto err_put_rproc;
 	}
 
+	if (dcfg->method == IMX_RPROC_MMIO) {
+		regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
+		if (IS_ERR(regmap)) {
+			dev_err(dev, "failed to find syscon\n");
+			ret = PTR_ERR(regmap);
+			goto err_put_rproc;
+		}
+		regmap_attach_dev(dev, regmap, &config);
+	}
+
 	priv = rproc->priv;
 	priv->rproc = rproc;
 	priv->regmap = regmap;