| Message ID | 20210721204703.1424034-6-l.stach@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | i.MX8MM GPC improvements and BLK_CTRL driver | expand |
> Subject: [PATCH v2 05/18] soc: imx: gpcv2: add domain option to keep > domain clocks enabled > > Some of the MIX domains are using clocks to drive the bus bridges. Those > must be enabled at all times, as long as the domain is powered up and they > don't have any other consumer than the power domain. Add an option to > keep the clocks attached to a domain enabled as long as the domain is power > up and only disable them after the domain is powered down. > > Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Reviewed-by: Peng Fan <peng.fan@nxp.com> > --- > drivers/soc/imx/gpcv2.c | 14 +++++++++----- > 1 file changed, 9 insertions(+), 5 deletions(-) > > diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c index > 35f26f57d1ac..c3b1d2580963 100644 > --- a/drivers/soc/imx/gpcv2.c > +++ b/drivers/soc/imx/gpcv2.c > @@ -202,6 +202,7 @@ struct imx_pgc_domain { > } bits; > > const int voltage; > + const bool keep_clocks; > struct device *dev; > }; > > @@ -295,7 +296,8 @@ static int imx_pgc_power_up(struct > generic_pm_domain *genpd) > } > > /* Disable reset clocks for all devices in the domain */ > - clk_bulk_disable_unprepare(domain->num_clks, domain->clks); > + if (!domain->keep_clocks) > + clk_bulk_disable_unprepare(domain->num_clks, domain->clks); > > return 0; > > @@ -317,10 +319,12 @@ static int imx_pgc_power_down(struct > generic_pm_domain *genpd) > int ret; > > /* Enable reset clocks for all devices in the domain */ > - ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks); > - if (ret) { > - dev_err(domain->dev, "failed to enable reset clocks\n"); > - return ret; > + if (!domain->keep_clocks) { > + ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks); > + if (ret) { > + dev_err(domain->dev, "failed to enable reset clocks\n"); > + return ret; > + } > } > > /* request the ADB400 to power down */ > -- > 2.30.2
diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c index 35f26f57d1ac..c3b1d2580963 100644 --- a/drivers/soc/imx/gpcv2.c +++ b/drivers/soc/imx/gpcv2.c @@ -202,6 +202,7 @@ struct imx_pgc_domain { } bits; const int voltage; + const bool keep_clocks; struct device *dev; }; @@ -295,7 +296,8 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd) } /* Disable reset clocks for all devices in the domain */ - clk_bulk_disable_unprepare(domain->num_clks, domain->clks); + if (!domain->keep_clocks) + clk_bulk_disable_unprepare(domain->num_clks, domain->clks); return 0; @@ -317,10 +319,12 @@ static int imx_pgc_power_down(struct generic_pm_domain *genpd) int ret; /* Enable reset clocks for all devices in the domain */ - ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks); - if (ret) { - dev_err(domain->dev, "failed to enable reset clocks\n"); - return ret; + if (!domain->keep_clocks) { + ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks); + if (ret) { + dev_err(domain->dev, "failed to enable reset clocks\n"); + return ret; + } } /* request the ADB400 to power down */
Some of the MIX domains are using clocks to drive the bus bridges. Those must be enabled at all times, as long as the domain is powered up and they don't have any other consumer than the power domain. Add an option to keep the clocks attached to a domain enabled as long as the domain is power up and only disable them after the domain is powered down. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> --- drivers/soc/imx/gpcv2.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-)