[v7] soc: fsl: enable acpi support in RCPM driver

From: Peng Ma <peng.ma@nxp.com>

This patch enables ACPI support in RCPM driver.

Signed-off-by: Peng Ma <peng.ma@nxp.com>
Signed-off-by: Ran Wang <ran.wang_1@nxp.com>
---
Change in v7:
 - Update comment for checking RCPM node which refferred to

Change in v6:
 - Remove copyright udpate to rebase on latest mainline

Change in v5:
 - Fix panic when dev->of_node is null

Change in v4:
 - Make commit subject more accurate
 - Remove unrelated new blank line

Change in v3:
 - Add #ifdef CONFIG_ACPI for acpi_device_id
 - Rename rcpm_acpi_imx_ids to rcpm_acpi_ids

Change in v2:
 - Update acpi_device_id to fix conflict with other driver

 drivers/soc/fsl/rcpm.c | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

On Wed, Apr 7, 2021 at 9:58 PM Ran Wang <ran.wang_1@nxp.com> wrote:
>
> From: Peng Ma <peng.ma@nxp.com>
>
> This patch enables ACPI support in RCPM driver.
>
> Signed-off-by: Peng Ma <peng.ma@nxp.com>
> Signed-off-by: Ran Wang <ran.wang_1@nxp.com>

Applied for next.  Thanks.

> ---
> Change in v7:
>  - Update comment for checking RCPM node which refferred to
>
> Change in v6:
>  - Remove copyright udpate to rebase on latest mainline
>
> Change in v5:
>  - Fix panic when dev->of_node is null
>
> Change in v4:
>  - Make commit subject more accurate
>  - Remove unrelated new blank line
>
> Change in v3:
>  - Add #ifdef CONFIG_ACPI for acpi_device_id
>  - Rename rcpm_acpi_imx_ids to rcpm_acpi_ids
>
> Change in v2:
>  - Update acpi_device_id to fix conflict with other driver
>
>  drivers/soc/fsl/rcpm.c | 24 ++++++++++++++++++++++--
>  1 file changed, 22 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/soc/fsl/rcpm.c b/drivers/soc/fsl/rcpm.c
> index 4ace28cab314..90d3f4060b0c 100644
> --- a/drivers/soc/fsl/rcpm.c
> +++ b/drivers/soc/fsl/rcpm.c
> @@ -13,6 +13,7 @@
>  #include <linux/slab.h>
>  #include <linux/suspend.h>
>  #include <linux/kernel.h>
> +#include <linux/acpi.h>
>
>  #define RCPM_WAKEUP_CELL_MAX_SIZE      7
>
> @@ -78,10 +79,20 @@ static int rcpm_pm_prepare(struct device *dev)
>                                 "fsl,rcpm-wakeup", value,
>                                 rcpm->wakeup_cells + 1);
>
> -               /*  Wakeup source should refer to current rcpm device */
> -               if (ret || (np->phandle != value[0]))
> +               if (ret)
>                         continue;
>
> +               /*
> +                * For DT mode, would handle devices with "fsl,rcpm-wakeup"
> +                * pointing to the current RCPM node.
> +                *
> +                * For ACPI mode, currently we assume there is only one
> +                * RCPM controller existing.
> +                */
> +               if (is_of_node(dev->fwnode))
> +                       if (np->phandle != value[0])
> +                               continue;
> +
>                 /* Property "#fsl,rcpm-wakeup-cells" of rcpm node defines the
>                  * number of IPPDEXPCR register cells, and "fsl,rcpm-wakeup"
>                  * of wakeup source IP contains an integer array: <phandle to
> @@ -172,10 +183,19 @@ static const struct of_device_id rcpm_of_match[] = {
>  };
>  MODULE_DEVICE_TABLE(of, rcpm_of_match);
>
> +#ifdef CONFIG_ACPI
> +static const struct acpi_device_id rcpm_acpi_ids[] = {
> +       {"NXP0015",},
> +       { }
> +};
> +MODULE_DEVICE_TABLE(acpi, rcpm_acpi_ids);
> +#endif
> +
>  static struct platform_driver rcpm_driver = {
>         .driver = {
>                 .name = "rcpm",
>                 .of_match_table = rcpm_of_match,
> +               .acpi_match_table = ACPI_PTR(rcpm_acpi_ids),
>                 .pm     = &rcpm_pm_ops,
>         },
>         .probe = rcpm_probe,
> --
> 2.25.1
>