linux-kernel - [PATCH] regulator: twl: mark vdd1/2 as continuous on twl4030

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Date:   Sat, 15 Jun 2019 18:33:14 +0200
From:   Andreas Kemnade <andreas@...nade.info>
To:     tony@...mide.com, lgirdwood@...il.com, broonie@...nel.org,
        linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, sboyd@...nel.org, nm@...com,
        vireshk@...nel.org, letux-kernel@...nphoenux.org
Cc:     Andreas Kemnade <andreas@...nade.info>
Subject: [PATCH] regulator: twl: mark vdd1/2 as continuous on twl4030

_opp_supported_by_regulators() wrongly ignored errors from
regulator_is_supported_voltage(), so it considered errors as
success. Since
commit 498209445124 ("regulator: core: simplify return value on suported_voltage")
regulator_is_supported_voltage() returns a real boolean, so
errors make _opp_supported_by_regulators() return false.

The VDD1/VDD2 regulators on twl4030 are neither defined with
voltage lists nor with the continuous flag set, so
regulator_is_supported_voltage() returns false and an error
before above mentioned commit (which was considered success)
The result is that after the above mentioned commit cpufreq
does not work properly e.g. dm3730.

[    2.490997] core: _opp_supported_by_regulators: OPP minuV: 1012500 maxuV: 1012500, not supported by regulator
[    2.501617] cpu cpu0: _opp_add: OPP not supported by regulators (300000000)
[    2.509246] core: _opp_supported_by_regulators: OPP minuV: 1200000 maxuV: 1200000, not supported by regulator
[    2.519775] cpu cpu0: _opp_add: OPP not supported by regulators (600000000)
[    2.527313] core: _opp_supported_by_regulators: OPP minuV: 1325000 maxuV: 1325000, not supported by regulator
[    2.537750] cpu cpu0: _opp_add: OPP not supported by regulators (800000000)

The patch fixes declaration of VDD1/2 regulators.

Fixes: 498209445124 ("regulator: core: simplify return value on suported_voltage")
Signed-off-by: Andreas Kemnade <andreas@...nade.info>
---
 drivers/regulator/twl-regulator.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/regulator/twl-regulator.c b/drivers/regulator/twl-regulator.c
index 6fa15b2d6fb3..f7bfdf53701d 100644
--- a/drivers/regulator/twl-regulator.c
+++ b/drivers/regulator/twl-regulator.c
@@ -478,6 +478,7 @@ static const struct twlreg_info TWL4030_INFO_##label = { \
 		.type = REGULATOR_VOLTAGE, \
 		.owner = THIS_MODULE, \
 		.enable_time = turnon_delay, \
+		.continuous_voltage_range = true, \
 		.of_map_mode = twl4030reg_map_mode, \
 		}, \
 	}
-- 
2.20.1