| Message ID | 20210429073050.21039-10-peng.fan@oss.nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | soc: imx: gpcv2: support i.MX8MM | expand |
On 29.04.21 09:30, Peng Fan (OSS) wrote: > From: Lucas Stach <l.stach@pengutronix.de> > > Normally the reset for the devices inside the power domain is > triggered automatically from the PGC in the power-up sequencing, > however on i.MX8MM this doesn't work for the GPU power domains. > > Add support for triggering the reset explicitly during the power > up sequencing. > > Signed-off-by: Lucas Stach <l.stach@pengutronix.de> > --- > drivers/soc/imx/gpcv2.c | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c > index 640f4165cfba..4a2c2a255d1a 100644 > --- a/drivers/soc/imx/gpcv2.c > +++ b/drivers/soc/imx/gpcv2.c > @@ -15,6 +15,7 @@ > #include <linux/pm_runtime.h> > #include <linux/regmap.h> > #include <linux/regulator/consumer.h> > +#include <linux/reset.h> > #include <linux/sizes.h> > #include <dt-bindings/power/imx7-power.h> > #include <dt-bindings/power/imx8mq-power.h> > @@ -108,6 +109,7 @@ struct imx_pgc_domain { > struct generic_pm_domain genpd; > struct regmap *regmap; > struct regulator *regulator; > + struct reset_control *reset; > struct clk_bulk_data *clks; > int num_clks; > > @@ -163,6 +165,8 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd) > goto out_regulator_disable; > } > > + reset_control_assert(domain->reset); > + > if (domain->bits.pxx) { > /* request the domain to power up */ > regmap_update_bits(domain->regmap, GPC_PU_PGC_SW_PUP_REQ, > @@ -185,6 +189,11 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd) > GPC_PGC_CTRL_PCR, 0); > } > > + /* delay for reset to propagate */ > + udelay(5); > + > + reset_control_deassert(domain->reset); > + > /* request the ADB400 to power up */ > if (domain->bits.hskreq) { > regmap_update_bits(domain->regmap, GPC_PU_PWRHSK, > @@ -531,11 +540,17 @@ static int imx_pgc_domain_probe(struct platform_device *pdev) > domain->voltage, domain->voltage); > } > > + Spurious blank line. Otherwise: Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de> > domain->num_clks = devm_clk_bulk_get_all(domain->dev, &domain->clks); > if (domain->num_clks < 0) > return dev_err_probe(domain->dev, domain->num_clks, > "Failed to get domain's clocks\n"); > > + domain->reset = devm_reset_control_array_get_optional_exclusive(domain->dev); > + if (IS_ERR(domain->reset)) > + return dev_err_probe(domain->dev, PTR_ERR(domain->reset), > + "Failed to get domain's resets\n"); > + > pm_runtime_enable(domain->dev); > > if (domain->bits.map) >
diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c index 640f4165cfba..4a2c2a255d1a 100644 --- a/drivers/soc/imx/gpcv2.c +++ b/drivers/soc/imx/gpcv2.c @@ -15,6 +15,7 @@ #include <linux/pm_runtime.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> +#include <linux/reset.h> #include <linux/sizes.h> #include <dt-bindings/power/imx7-power.h> #include <dt-bindings/power/imx8mq-power.h> @@ -108,6 +109,7 @@ struct imx_pgc_domain { struct generic_pm_domain genpd; struct regmap *regmap; struct regulator *regulator; + struct reset_control *reset; struct clk_bulk_data *clks; int num_clks; @@ -163,6 +165,8 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd) goto out_regulator_disable; } + reset_control_assert(domain->reset); + if (domain->bits.pxx) { /* request the domain to power up */ regmap_update_bits(domain->regmap, GPC_PU_PGC_SW_PUP_REQ, @@ -185,6 +189,11 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd) GPC_PGC_CTRL_PCR, 0); } + /* delay for reset to propagate */ + udelay(5); + + reset_control_deassert(domain->reset); + /* request the ADB400 to power up */ if (domain->bits.hskreq) { regmap_update_bits(domain->regmap, GPC_PU_PWRHSK, @@ -531,11 +540,17 @@ static int imx_pgc_domain_probe(struct platform_device *pdev) domain->voltage, domain->voltage); } + domain->num_clks = devm_clk_bulk_get_all(domain->dev, &domain->clks); if (domain->num_clks < 0) return dev_err_probe(domain->dev, domain->num_clks, "Failed to get domain's clocks\n"); + domain->reset = devm_reset_control_array_get_optional_exclusive(domain->dev); + if (IS_ERR(domain->reset)) + return dev_err_probe(domain->dev, PTR_ERR(domain->reset), + "Failed to get domain's resets\n"); + pm_runtime_enable(domain->dev); if (domain->bits.map)