linux-kernel - [PATCH 02/16] soc: imx: gpcv2: move domain mapping to domain driver probe

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Message-Id: <20210429073050.21039-3-peng.fan@oss.nxp.com>
Date:   Thu, 29 Apr 2021 15:30:36 +0800
From:   "Peng Fan (OSS)" <peng.fan@....nxp.com>
To:     robh+dt@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de
Cc:     kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        p.zabel@...gutronix.de, l.stach@...gutronix.de, krzk@...nel.org,
        agx@...xcpu.org, marex@...x.de, andrew.smirnov@...il.com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, ping.bai@....com,
        frieder.schrempf@...tron.de, aford173@...il.com, abel.vesa@....com
Subject: [PATCH 02/16] soc: imx: gpcv2: move domain mapping to domain driver probe

From: Lucas Stach <l.stach@...gutronix.de>

As long as the power domain driver is active we want power control
over the domain (which is what the mapping bit requests), so there
is no point in whacking it for every power control action, simply
set the bit in driver probe and clear it when the driver is removed.

Signed-off-by: Lucas Stach <l.stach@...gutronix.de>
---
 drivers/soc/imx/gpcv2.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c
index 512e6f4acafd..552d3e6bee52 100644
--- a/drivers/soc/imx/gpcv2.c
+++ b/drivers/soc/imx/gpcv2.c
@@ -140,14 +140,11 @@ static int imx_gpc_pu_pgc_sw_pxx_req(struct generic_pm_domain *genpd,
 	int i, ret = 0;
 	u32 pxx_req;
 
-	regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
-			   domain->bits.map, domain->bits.map);
-
 	if (has_regulator && on) {
 		ret = regulator_enable(domain->regulator);
 		if (ret) {
 			dev_err(domain->dev, "failed to enable regulator\n");
-			goto unmap;
+			return ret;
 		}
 	}
 
@@ -203,9 +200,7 @@ static int imx_gpc_pu_pgc_sw_pxx_req(struct generic_pm_domain *genpd,
 		/* Preserve earlier error code */
 		ret = ret ?: err;
 	}
-unmap:
-	regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
-			   domain->bits.map, 0);
+
 	return ret;
 }
 
@@ -499,10 +494,13 @@ static int imx_pgc_domain_probe(struct platform_device *pdev)
 	if (ret)
 		return dev_err_probe(domain->dev, ret, "Failed to get domain's clocks\n");
 
+	regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
+			   domain->bits.map, domain->bits.map);
+
 	ret = pm_genpd_init(&domain->genpd, NULL, true);
 	if (ret) {
 		dev_err(domain->dev, "Failed to init power domain\n");
-		goto out_put_clocks;
+		goto out_domain_unmap;
 	}
 
 	ret = of_genpd_add_provider_simple(domain->dev->of_node,
@@ -516,7 +514,9 @@ static int imx_pgc_domain_probe(struct platform_device *pdev)
 
 out_genpd_remove:
 	pm_genpd_remove(&domain->genpd);
-out_put_clocks:
+out_domain_unmap:
+	regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
+			   domain->bits.map, 0);
 	imx_pgc_put_clocks(domain);
 
 	return ret;
@@ -528,6 +528,10 @@ static int imx_pgc_domain_remove(struct platform_device *pdev)
 
 	of_genpd_del_provider(domain->dev->of_node);
 	pm_genpd_remove(&domain->genpd);
+
+	regmap_update_bits(domain->regmap, GPC_PGC_CPU_MAPPING,
+			   domain->bits.map, 0);
+
 	imx_pgc_put_clocks(domain);
 
 	return 0;
-- 
2.30.0