From ebf6dad0de89677aa58a4d8b009014ff88a23452 Mon Sep 17 00:00:00 2001 From: Steve Twiss Date: Wed, 12 Feb 2014 09:57:52 +0000 Subject: regulator: da9063: Bug fix when setting max voltage on LDOs 5-11 Bug fix to allow the setting of maximum voltage for certain LDOs. What the bug is: There is a problem caused by an invalid calculation of n_voltages in the driver. This n_voltages value has the potential to be different for each regulator. The value for linear_min_sel is set as DA9063_V##regl_name# which can be different depending upon the regulator. This is chosen according to the following definitions in the DA9063 registers.h file: DA9063_VLDO1_BIAS 0 DA9063_VLDO2_BIAS 0 DA9063_VLDO3_BIAS 0 DA9063_VLDO4_BIAS 0 DA9063_VLDO5_BIAS 2 DA9063_VLDO6_BIAS 2 DA9063_VLDO7_BIAS 2 DA9063_VLDO8_BIAS 2 DA9063_VLDO9_BIAS 3 DA9063_VLDO10_BIAS 2 DA9063_VLDO11_BIAS 2 The calculation for n_voltages is valid for LDOs whose BIAS value is zero but this is not correct for those LDOs which have a non-zero value. What the fix is: In order to take into account the non-zero linear_min_sel value which is set for the regulators LDO5, LDO6, LDO7, LDO8, LDO9, LDO10 and LDO11, the calculation for n_voltages should take into account the missing term defined by DA9063_V##regl_name#. This will in turn allow the core constraints calculation to set the maximum voltage limits correctly and therefore allow users to apply the maximum expected voltage to all of the LDOs. Signed-off-by: Steve Twiss Signed-off-by: Mark Brown Cc: stable@vger.kernel.org --- drivers/regulator/da9063-regulator.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/regulator/da9063-regulator.c b/drivers/regulator/da9063-regulator.c index 56727eb745df..91e99a2c8dc1 100644 --- a/drivers/regulator/da9063-regulator.c +++ b/drivers/regulator/da9063-regulator.c @@ -1,3 +1,4 @@ + /* * Regulator driver for DA9063 PMIC series * @@ -60,7 +61,8 @@ struct da9063_regulator_info { .desc.ops = &da9063_ldo_ops, \ .desc.min_uV = (min_mV) * 1000, \ .desc.uV_step = (step_mV) * 1000, \ - .desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1), \ + .desc.n_voltages = (((max_mV) - (min_mV))/(step_mV) + 1 \ + + (DA9063_V##regl_name##_BIAS)), \ .desc.enable_reg = DA9063_REG_##regl_name##_CONT, \ .desc.enable_mask = DA9063_LDO_EN, \ .desc.vsel_reg = DA9063_REG_V##regl_name##_A, \ -- cgit v1.2.3 From 4e52c03dfcdef5ad1415e18af0e7230d98ff3a7c Mon Sep 17 00:00:00 2001 From: Sachin Kamat Date: Thu, 13 Feb 2014 17:05:06 +0530 Subject: regulator: s5m8767: Use of_get_child_by_name of_find_node_by_name walks the allnodes list, and can thus walk outside of the parent node. Use of_get_child_by_name instead. Signed-off-by: Sachin Kamat Signed-off-by: Mark Brown --- drivers/regulator/s5m8767.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c index d7164bb75d3e..092d44e5db4e 100644 --- a/drivers/regulator/s5m8767.c +++ b/drivers/regulator/s5m8767.c @@ -535,7 +535,7 @@ static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev, return -ENODEV; } - regulators_np = of_find_node_by_name(pmic_np, "regulators"); + regulators_np = of_get_child_by_name(pmic_np, "regulators"); if (!regulators_np) { dev_err(iodev->dev, "could not find regulators sub-node\n"); return -EINVAL; -- cgit v1.2.3 From b7db01f3b3b86f6b02a98756a051d176610ca0f1 Mon Sep 17 00:00:00 2001 From: Sachin Kamat Date: Thu, 13 Feb 2014 17:05:07 +0530 Subject: regulator: s5m8767: Add missing of_node_put Add of_node_put to decrement the ref count. Signed-off-by: Sachin Kamat Signed-off-by: Mark Brown --- drivers/regulator/s5m8767.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c index 092d44e5db4e..d958dfa05125 100644 --- a/drivers/regulator/s5m8767.c +++ b/drivers/regulator/s5m8767.c @@ -591,6 +591,8 @@ static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev, rmode++; } + of_node_put(regulators_np); + if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL)) { pdata->buck2_gpiodvs = true; -- cgit v1.2.3 From 08221fc4e7aa585a59de90c0354da3e8d3e88d94 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Fri, 21 Feb 2014 13:12:38 +0100 Subject: regulator: max14577: Fix invalid return value on DT parse success This fixes bug introduced in 667a6b7a (regulator: max14577: Add missing of_node_put). The DTS parsing function returned number of matched regulators as success status which then was compared against 0 in probe. Result was a probe fail after successful parsing the DTS: max14577-regulator: probe of max14577-regulator failed with error 2 Signed-off-by: Krzysztof Kozlowski Reviwed-by: Sachin Kamat Signed-off-by: Mark Brown --- drivers/regulator/max14577.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/regulator/max14577.c b/drivers/regulator/max14577.c index 186df8785a91..e0619526708c 100644 --- a/drivers/regulator/max14577.c +++ b/drivers/regulator/max14577.c @@ -166,9 +166,10 @@ static int max14577_regulator_dt_parse_pdata(struct platform_device *pdev) ret = of_regulator_match(&pdev->dev, np, max14577_regulator_matches, MAX14577_REG_MAX); - if (ret < 0) { + if (ret < 0) dev_err(&pdev->dev, "Error parsing regulator init data: %d\n", ret); - } + else + ret = 0; of_node_put(np); -- cgit v1.2.3