linux-kernel - [PATCH 2/2] regulator: max77620: disable notifier events for FPS rails

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Date:   Thu, 10 Jan 2019 12:11:17 +0800
From:   Mark Zhang <markz@...dia.com>
To:     <lgirdwood@...il.com>, <broonie@...nel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <linux-tegra@...r.kernel.org>, Mark Zhang <markz@...dia.com>,
        "Venkat Reddy Talla" <vreddytalla@...dia.com>
Subject: [PATCH 2/2] regulator: max77620: disable notifier events for FPS rails

Disabling regulator notifier events if regulator is
configured part of flexible power sequencer(FPS),
there is no SW control to enable/disable if regulator
is configured part of FPS, so disabling notifier events
if client driver try to enable/disable FPS rails.

Signed-off-by: Venkat Reddy Talla <vreddytalla@...dia.com>
Signed-off-by: Mark Zhang <markz@...dia.com>
---
 drivers/regulator/max77620-regulator.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/regulator/max77620-regulator.c b/drivers/regulator/max77620-regulator.c
index cd93cf53e23c..20e985071bfc 100644
--- a/drivers/regulator/max77620-regulator.c
+++ b/drivers/regulator/max77620-regulator.c
@@ -823,6 +823,13 @@ static int max77620_regulator_probe(struct platform_device *pdev)
 				rdesc->name, ret);
 			return ret;
 		}
+
+		/* there is no SW control for rails which are part of FPS
+		 * set always no contraint to true to avoid regulator
+		 * enable/disable notification
+		 */
+		if (pmic->reg_pdata[id].active_fps_src != MAX77620_FPS_SRC_NONE)
+			rdev->constraints->always_on = true;
 	}
 
 	return 0;
-- 
2.19.2