From: Axel Lin <axel.lin@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: Marek Vasut <marek.vasut@gmail.com>, Liam Girdwood <lrg@ti.com>,
Mark Brown <broonie@opensource.wolfsonmicro.com>
Subject: [PATCH RFC 1/2] regulator: core: Allow uV_step to be 0 for linear mapping if fixed voltage
Date: Thu, 07 Jun 2012 10:05:14 +0800 [thread overview]
Message-ID: <1339034714.7309.3.camel@phoenix> (raw)
Fixed voltage is a kind of linear mapping where n_voltages is 1 and uV_step is
0. This change allows [list|map]_voltage_linear to be used for fixed voltage.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
---
drivers/regulator/core.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 02c1940..876f5fc 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2070,6 +2070,14 @@ int regulator_map_voltage_linear(struct regulator_dev *rdev,
{
int ret, voltage;
+ /* Allow uV_step to be 0 for fixed voltage */
+ if (rdev->desc->n_voltages == 1 && rdev->desc->uV_step == 0) {
+ if (min_uV <= rdev->desc->min_uV && rdev->desc->min_uV <= max_uV)
+ return 0;
+ else
+ return -EINVAL;
+ }
+
if (!rdev->desc->uV_step) {
BUG_ON(!rdev->desc->uV_step);
return -EINVAL;
--
1.7.9.5
next reply other threads:[~2012-06-07 2:05 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-07 2:05 Axel Lin [this message]
2012-06-07 2:06 ` [PATCH RFC 2/2] regulator: isl6271a: Use regulator_[list|map]_voltage_linear for isl_fixed_ops Axel Lin
2012-06-07 23:27 ` [PATCH RFC 1/2] regulator: core: Allow uV_step to be 0 for linear mapping if fixed voltage Mark Brown
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