From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: Peng Fan <peng.fan@nxp.com>
Cc: devicetree@vger.kernel.org, festevam@gmail.com,
s.hauer@pengutronix.de, linux-remoteproc@vger.kernel.org,
linux-kernel@vger.kernel.org, bjorn.andersson@linaro.org,
o.rempel@pengutronix.de, robh+dt@kernel.org, linux-imx@nxp.com,
kernel@pengutronix.de, shawnguo@kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 04/10] remoteproc: imx_rproc: make syscon optional
Date: Tue, 11 Aug 2020 16:40:29 -0600 [thread overview]
Message-ID: <20200811224029.GE3370567@xps15> (raw)
In-Reply-To: <20200724080813.24884-5-peng.fan@nxp.com>
On Fri, Jul 24, 2020 at 04:08:07PM +0800, Peng Fan wrote:
> Make syscon optional, since i.MX8QM/QXP/7ULP not have SRC to control M4.
> But currently i.MX8QM/QXP/7ULP not added, so still check regmap
> when start/stop to avoid unhappy things.
>
> Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
> drivers/remoteproc/imx_rproc.c | 11 +++++++++--
> 1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
> index 82594a800a1b..4fad5c0b1c05 100644
> --- a/drivers/remoteproc/imx_rproc.c
> +++ b/drivers/remoteproc/imx_rproc.c
> @@ -162,6 +162,9 @@ static int imx_rproc_start(struct rproc *rproc)
> struct device *dev = priv->dev;
> int ret;
>
> + if (!priv->regmap)
> + return -EOPNOTSUPP;
Proceeding this way is hard to maintain. I would perfer to add specific
operations based on the scenario or coprocessor we are working with.
> +
> ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
> dcfg->src_mask, dcfg->src_start);
> if (ret)
> @@ -177,6 +180,9 @@ static int imx_rproc_stop(struct rproc *rproc)
> struct device *dev = priv->dev;
> int ret;
>
> + if (!priv->regmap)
> + return -EOPNOTSUPP;
> +
> ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
> dcfg->src_mask, dcfg->src_stop);
> if (ret)
> @@ -325,9 +331,10 @@ static int imx_rproc_probe(struct platform_device *pdev)
> 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 = NULL;
> + } else {
> + regmap_attach_dev(dev, regmap, &config);
Here you are altering how all the existing implemenation are currently working.
Add a new field to imx_rproc_dcfg and based on that, determine if a regmap is
mandatory or not.
> }
> - regmap_attach_dev(dev, regmap, &config);
>
> /* set some other name then imx */
> rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops,
> --
> 2.16.4
>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-08-11 22:41 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-24 8:08 [PATCH 00/10] remoteproc: imx_rproc: support iMX8M and early boot Peng Fan
2020-07-24 8:08 ` [PATCH 01/10] dt-bindings: remoteproc: imx_rproc: add i.MX8MQ/M Peng Fan
2020-07-31 20:14 ` Rob Herring
2020-07-24 8:08 ` [PATCH 02/10] remoteproc: imx_rproc: correct err message Peng Fan
2020-08-11 19:56 ` Mathieu Poirier
2020-07-24 8:08 ` [PATCH 03/10] remoteproc: imx: use devm_ioremap Peng Fan
2020-07-27 6:23 ` Oleksij Rempel
2020-07-27 6:28 ` Peng Fan
2020-07-27 6:41 ` Oleksij Rempel
2020-07-27 6:51 ` Peng Fan
2020-07-27 7:37 ` Oleksij Rempel
2020-07-27 8:11 ` Peng Fan
2020-07-28 7:20 ` Oleksij Rempel
2020-07-24 8:08 ` [PATCH 04/10] remoteproc: imx_rproc: make syscon optional Peng Fan
2020-08-11 22:40 ` Mathieu Poirier [this message]
2020-08-18 21:43 ` Mathieu Poirier
2020-08-19 0:51 ` Peng Fan
2020-08-19 19:45 ` Mathieu Poirier
2020-08-20 2:04 ` Peng Fan
2020-08-20 19:27 ` Mathieu Poirier
2020-07-24 8:08 ` [PATCH 05/10] remoteproc: imx_rproc: make clk optional Peng Fan
2020-07-24 8:08 ` [PATCH 06/10] remoteproc: imx_rproc: add load hook Peng Fan
2020-07-27 5:20 ` Oleksij Rempel
2020-08-11 21:40 ` Mathieu Poirier
2020-07-24 8:08 ` [PATCH 07/10] remoteproc: imx_rproc: add i.MX specific parse fw hook Peng Fan
2020-08-11 21:56 ` Mathieu Poirier
2020-07-24 8:08 ` [PATCH 08/10] remoteproc: imx_rproc: support i.MX8MQ/M Peng Fan
2020-07-24 8:08 ` [PATCH 09/10] remoteproc: imx_proc: enable virtio/mailbox Peng Fan
2020-07-24 8:08 ` [PATCH 10/10] remoteproc: imx_rproc: support coproc booting before Linux Peng Fan
2020-08-11 22:36 ` Mathieu Poirier
2020-07-27 6:38 ` [PATCH 00/10] remoteproc: imx_rproc: support iMX8M and early boot Oleksij Rempel
2020-07-27 6:44 ` Peng Fan
2020-07-27 7:54 ` Oleksij Rempel
2020-07-27 9:18 ` Peng Fan
2020-07-28 7:26 ` Oleksij Rempel
2020-07-28 7:50 ` Peng Fan
2020-07-28 7:55 ` Oleksij Rempel
2020-07-28 9:36 ` Peng Fan
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200811224029.GE3370567@xps15 \
--to=mathieu.poirier@linaro.org \
--cc=bjorn.andersson@linaro.org \
--cc=devicetree@vger.kernel.org \
--cc=festevam@gmail.com \
--cc=kernel@pengutronix.de \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-imx@nxp.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-remoteproc@vger.kernel.org \
--cc=o.rempel@pengutronix.de \
--cc=peng.fan@nxp.com \
--cc=robh+dt@kernel.org \
--cc=s.hauer@pengutronix.de \
--cc=shawnguo@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).