diff mbox series

[V3,13/13] soc: imx: gpcv2: move reset assert after requesting domain power up

Message ID 20210510040045.13225-14-peng.fan@oss.nxp.com (mailing list archive)
State New, archived
Headers show
Series soc: imx: gpcv2: support i.MX8MM | expand

Commit Message

Peng Fan (OSS) May 10, 2021, 4 a.m. UTC 
From: Peng Fan <peng.fan@nxp.com>

The i.MX8MM VPU power up sequence is a bit special, it must follow:
1. request power up
2. reset assert
3. reset deassert

This change in this patch will not affect other domains, because
the power domain default is in asserted state, unless bootloader
deassert the reset. It also applies to GPU power domain.

Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 drivers/soc/imx/gpcv2.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c
index 2490757f759d..35bbb1bc5159 100644
--- a/drivers/soc/imx/gpcv2.c
+++ b/drivers/soc/imx/gpcv2.c
@@ -217,8 +217,6 @@  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,
@@ -241,6 +239,8 @@  static int imx_pgc_power_up(struct generic_pm_domain *genpd)
 				  GPC_PGC_CTRL_PCR);
 	}
 
+	reset_control_assert(domain->reset);
+
 	/* delay for reset to propagate */
 	udelay(5);