Messages in this thread Patch in this message | | | From | "Peng Fan (OSS)" <> | Subject | [PATCH V4 4/8] genpd: imx: scu-pd: do not power off console if no_console_suspend | Date | Mon, 14 Aug 2023 18:41:23 +0800 |
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From: Peng Fan <peng.fan@nxp.com>
Do not power off console if no_console_suspend, this will leave the serial device's corresponding PM domain on during system suspend, which is useful for debug system suspend.
Signed-off-by: Peng Fan <peng.fan@nxp.com> --- drivers/genpd/imx/scu-pd.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/genpd/imx/scu-pd.c b/drivers/genpd/imx/scu-pd.c index 08583a10ac62..d69da79d3130 100644 --- a/drivers/genpd/imx/scu-pd.c +++ b/drivers/genpd/imx/scu-pd.c @@ -52,6 +52,7 @@ */ #include <dt-bindings/firmware/imx/rsrc.h> +#include <linux/console.h> #include <linux/firmware/imx/sci.h> #include <linux/firmware/imx/svc/rm.h> #include <linux/io.h> @@ -324,6 +325,10 @@ static int imx_sc_pd_power(struct generic_pm_domain *domain, bool power_on) msg.resource = pd->rsrc; msg.mode = power_on ? IMX_SC_PM_PW_MODE_ON : IMX_SC_PM_PW_MODE_LP; + /* keep uart console power on for no_console_suspend */ + if (imx_con_rsrc == pd->rsrc && !console_suspend_enabled && !power_on) + return -EBUSY; + ret = imx_scu_call_rpc(pm_ipc_handle, &msg, true); if (ret) dev_err(&domain->dev, "failed to power %s resource %d ret %d\n", -- 2.37.1
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