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    SubjectRe: [PATCH V4 7/8] remoteproc: imx_rproc: support i.MX7ULP
    On Thu, Apr 15, 2021 at 09:27:40PM +0800, peng.fan@oss.nxp.com wrote:
    > From: Peng Fan <peng.fan@nxp.com>
    >
    > i.MX7ULP A7 core runs under control of M4 core, M4 core starts by ROM
    > and powers most serivces used by A7 core, so A7 core has no power to

    s/serivces/services

    > start and stop M4 core. And the M4 core's state is default RPROC_DETACHED
    > and remoteproc framework not able to stop the M4 core.
    >
    > Signed-off-by: Peng Fan <peng.fan@nxp.com>
    > ---
    > drivers/remoteproc/imx_rproc.c | 25 ++++++++++++++++++++++++-
    > 1 file changed, 24 insertions(+), 1 deletion(-)
    >
    > diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
    > index 56dfcc1..0592865 100644
    > --- a/drivers/remoteproc/imx_rproc.c
    > +++ b/drivers/remoteproc/imx_rproc.c
    > @@ -136,6 +136,14 @@ static const struct imx_rproc_att imx_rproc_att_imx8mq[] = {
    > { 0x40000000, 0x40000000, 0x80000000, 0 },
    > };
    >
    > +static const struct imx_rproc_att imx_rproc_att_imx7ulp[] = {
    > + {0x1FFD0000, 0x1FFD0000, 0x30000, ATT_OWN},
    > + {0x20000000, 0x20000000, 0x10000, ATT_OWN},
    > + {0x2F000000, 0x2F000000, 0x20000, ATT_OWN},
    > + {0x2F020000, 0x2F020000, 0x20000, ATT_OWN},
    > + {0x60000000, 0x60000000, 0x40000000, 0}
    > +};
    > +
    > static const struct imx_rproc_att imx_rproc_att_imx7d[] = {
    > /* dev addr , sys addr , size , flags */
    > /* OCRAM_S (M4 Boot code) - alias */
    > @@ -196,6 +204,12 @@ static const struct imx_rproc_dcfg imx_rproc_cfg_imx8mq = {
    > .method = IMX_RPROC_MMIO,
    > };
    >
    > +static const struct imx_rproc_dcfg imx_rproc_cfg_imx7ulp = {
    > + .att = imx_rproc_att_imx7ulp,
    > + .att_size = ARRAY_SIZE(imx_rproc_att_imx7ulp),
    > + .method = IMX_RPROC_NONE,
    > +};
    > +
    > static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
    > .src_reg = IMX7D_SRC_SCR,
    > .src_mask = IMX7D_M4_RST_MASK,
    > @@ -238,6 +252,9 @@ static int imx_rproc_stop(struct rproc *rproc)
    > struct device *dev = priv->dev;
    > int ret;
    >
    > + if (dcfg->method == IMX_RPROC_NONE)
    > + return -EOPNOTSUPP;
    > +
    > ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
    > dcfg->src_mask, dcfg->src_stop);
    > if (ret)
    > @@ -580,8 +597,13 @@ static int imx_rproc_detect_mode(struct imx_rproc *priv)
    > int ret;
    > u32 val;
    >
    > - if (dcfg->method != IMX_RPROC_MMIO)
    > + switch (dcfg->method) {
    > + case IMX_RPROC_NONE:
    > + priv->rproc->state = RPROC_DETACHED;
    > return 0;
    > + default:
    > + break;
    > + }
    >
    > regmap = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
    > if (IS_ERR(regmap)) {
    > @@ -726,6 +748,7 @@ static int imx_rproc_remove(struct platform_device *pdev)
    > }
    >
    > static const struct of_device_id imx_rproc_of_match[] = {
    > + { .compatible = "fsl,imx7ulp-cm4", .data = &imx_rproc_cfg_imx7ulp },
    > { .compatible = "fsl,imx7d-cm4", .data = &imx_rproc_cfg_imx7d },
    > { .compatible = "fsl,imx6sx-cm4", .data = &imx_rproc_cfg_imx6sx },
    > { .compatible = "fsl,imx8mq-cm4", .data = &imx_rproc_cfg_imx8mq },
    > --
    > 2.7.4
    >

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