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Message-Id: <1424995217-23381-1-git-send-email-sboyd@codeaurora.org>
Date: Thu, 26 Feb 2015 16:00:17 -0800
From: Stephen Boyd <sboyd@...eaurora.org>
To: Bjorn Andersson <bjorn.andersson@...ymobile.com>
Cc: Bjorn Andersson <bjorn@...o.se>,
Andy Gross <agross@...eaurora.org>,
Rob Herring <robh+dt@...nel.org>,
Pawel Moll <pawel.moll@....com>,
Mark Brown <broonie@...aro.org>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Lee Jones <lee.jones@...aro.org>,
Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>
Subject: [PATCH] regulator: qcom-rpm: Rework for single device
The RPM regulators are not individual devices. Creating platform
devices for each regulator bloats the kernel's runtime memory
footprint by ~12k. Let's rework this driver to be a single
platform device for all the RPM regulators. This makes the
DT match the schematic/datasheet closer too because now the
regulators node contains a list of supplies at the package level
for a particular PMIC model.
Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
---
On 02/24, Bjorn Andersson wrote:
> On Wed 18 Feb 18:29 PST 2015, Stephen Boyd wrote:
>
> > On 02/18/15 13:08, Bjorn Andersson wrote:
> > > On Wed, Feb 18, 2015 at 12:28 PM, Stephen Boyd <sboyd@...eaurora.org> wrote:
>
> After taking a deeper look at this I've come to the following
> conclusion:
>
> We can save 2100 bytes of data by spreading out the magic numbers from
> the rpm resource tables into the regulator, clock and bus drivers. At
> the cost of having this rpm-specific information spread out.
>
> Separate of that we could rewrite the entire regulator implementation to
> define all regulators in platform specific tables in the regulators.
> This would save about 12-15k of ram.
Cool I started doing that.
>
> This can however be done in two ways:
> 1) We modify the mfd driver to instatiate 3 mfd_cells; one of them
> being "qcom,rpm-regulators". We modify the regulator driver to have
> tables of the regulators for each platform and matching regulator
> parameters by of_node name and registering these.
>
> 2) We stick with this binding, we then go ahead and do the same
> modification to the mfd as above - passing the rpm of_node to the
> regulator driver, that walks the children and match that to the current
> compatible list. (in other words, we replace of_platform_populate with
> our own mechamism).
>
>
> The benefit of 2 is that we can use the code that was posted 10 months
> ago and merged 3 months ago until someone prioritize those 12kb.
I did (1) without modifying the MFD driver.
>
>
> To take either of these paths the issue at the bottom has to be
> resolved first.
Right. I think that's resolved now.
>
>
> More answers follows inline:
>
> >
> > We're already maintaining these tables in qcom-rpm.c. I'm advocating for
> > removing those tables from the rpm driver and putting the data into the
> > regulator driver. Then we don't have to index into a sparse table to
> > figure out what values the RPM wants to use. Instead we have the data at
> > hand for a particular regulator based on the of_regulator_match.
> >
>
> I do like the "separation of concerns" between the rpm driver and the
> children, but you're right in that we're wasting almost 3kb in doing so:
>
> (gdb) p sizeof(apq8064_rpm_resource_table) + sizeof(msm8660_rpm_resource_table) + sizeof(msm8960_rpm_resource_table)
> $2 = 6384
>
> vs
>
> (gdb) p sizeof(struct qcom_rpm_resource) * (77 + 74 + 73)
> $3 = 3584
>
> The alternative would be to spread those magic constants out in the
> three client drivers.
>
> Looking at this from a software design perspective I stand by the
> argument that the register layout of the rpm is not a regulator driver
> implementation detail and is better kept separate.
>
> As we decided to define the regulators in code but the actual
> composition in dt it was not possible to put the individual numbers in
> DT. Having reg = <165 68 48> does not make any sense, unless we perhaps
> maintain said table in the dt binding documentation.
For now I've left it so that the #define is used in C code.
>
> > From what I can tell, that data is split in two places. The regulator
> > type knows how big the data we want to send is (1 or 2) and that is
> > checked in the RPM driver to make sure that the two agree (this part
> > looks like over-defensive coding).
>
> Yeah, after debugging production code for years I like to be slightly on
> the defensive side. But the size could of course be dropped from the
> resource-tables; reducing the savings of your suggestion by another 800
> bytes...
Sounds good. We should probably do it.
>
> > Then the DT has a made up number that
> > maps to 3 different numbers in the RPM driver.
>
> Reading the following snippet in my dts file makes imidiate sense:
>
> reg = <QCOM_RPM_PM8921_SMPS1>
>
> the following doesn't make any sense:
>
> reg = <116 31 30>;
>
> Maybe it's write-once in a dts so it doesn't matter that much - as long
> as the node is descriptive. But I like the properties to be human
> understandable.
Wouldn't a
#define QCOM_RPM_PM8921_SMPS1 116 31 30
suffice? That looks to be the same readability.
>
> > If the RPM was moving these offsets
> > around within the same compatible string it would make sense to put that
> > in DT and figure out dynamically what the offsets are because they
> > really can be different.
>
> The proposed binding states the following:
>
> - compatible:
> Usage: required
> Value type: <string>
> Definition: must be one of:
> "qcom,rpm-pm8058-smps"
> "qcom,rpm-pm8901-ftsmps"
> "qcom,rpm-pm8921-smps"
> "qcom,rpm-pm8921-ftsmps"
>
> Doesn't this map to the case you say make sense?
I mean the compatible for the entire RPM/regulators node (i.e. qcom,rpm-msm8960
or qcom,rpm-apq8064). Not each individual regulator, which IMO shouldn't need a compatible at all.
>
> > >
> > > Non the less, we must provide this information to the regulator
> > > framework in some way if we want its help.
> > > If we define all regulators in code (and just bring their properties
> > > from DT) then we could encapsulate the relationship there as well.
> > > But with the current suggested solution of having all this data coming
> > > from DT I simply rely on the existing infrastructure for describing
> > > supply-dependencies in DT.
> > >
> > >
> >
> > Yes I don't see how putting the data in C or in DT or having a
> > regulators encapsulating node makes it impossible to specify the supply.
> >
>
> Me neither, a month ago...
>
> Here's the discussion we had with Mark regarding having the regulator
> core pick up -supply properties from the individual child of_nodes of a
> regulator driver:
>
> https://lkml.org/lkml/2015/2/4/759
>
> As far as I can see this has to be fixed for us to move over to having
> one driver registering all our regulators, independently of how we
> structure this binding.
>
Mark is saying that the entire PMIC (e.g. PM8921) is the package. On the
package there are pins like VIN_L27, VIN_L24, etc (look at a schematic). When
you consider the regulators node (compatible = "qcom,rpm-pm8921-regulators")
is the package then you can see that it should have a handful of vin_*-supply
properties that correspond to what you see in the schematic and the datasheet.
This way if a board designer has decided to run a particular supply to
VIN_L1_L2_L12_L18 they just wire it up in DT and everything works. They don't
have to look at the binding for the L1, L2, L12, and L18 regulators and figure
out that it uses vin-supply for the supply. Plus everything matches what
they see in the schematic and datasheets.
Note: This patch is not complete. We still need to fill out the other pmics
and standalone regulators (smb208) that this driver is for.
drivers/regulator/qcom_rpm-regulator.c | 484 ++++++++++++++++++++++++++++-----
1 file changed, 416 insertions(+), 68 deletions(-)
diff --git a/drivers/regulator/qcom_rpm-regulator.c b/drivers/regulator/qcom_rpm-regulator.c
index 00c5cc3d9546..538733bb7e8b 100644
--- a/drivers/regulator/qcom_rpm-regulator.c
+++ b/drivers/regulator/qcom_rpm-regulator.c
@@ -581,27 +581,347 @@ static const struct qcom_rpm_reg smb208_smps = {
.supports_force_mode_bypass = false,
};
+struct qcom_rpm_reg_desc {
+ const struct qcom_rpm_reg *template;
+ int resource;
+ const char *supply;
+};
+
+struct qcom_rpm_of_match {
+ struct of_regulator_match *of_match;
+ unsigned int size;
+};
+
+#define DEFINE_QCOM_RPM_OF_MATCH(t) \
+ struct qcom_rpm_of_match t##_m = { \
+ .of_match = (t), \
+ .size = ARRAY_SIZE(t), \
+ }
+
+static struct of_regulator_match pm8921_regs[] = {
+ {
+ .name = "s1",
+ .driver_data = &(struct qcom_rpm_reg_desc){
+ .template = &pm8921_smps,
+ .resource = QCOM_RPM_PM8921_SMPS1,
+ },
+ },
+ {
+ .name = "s2",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_smps,
+ .resource = QCOM_RPM_PM8921_SMPS2,
+ },
+ },
+ {
+ .name = "s3",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_smps,
+ .resource = QCOM_RPM_PM8921_SMPS3,
+ },
+ },
+ {
+ .name = "s4",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_smps,
+ .resource = QCOM_RPM_PM8921_SMPS4,
+ },
+ },
+ {
+ .name = "s7",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_smps,
+ .resource = QCOM_RPM_PM8921_SMPS7,
+ },
+ },
+ {
+ .name = "s8",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_smps,
+ .resource = QCOM_RPM_PM8921_SMPS8,
+ },
+ },
+ {
+ .name = "l1",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_nldo,
+ .resource = QCOM_RPM_PM8921_LDO1,
+ .supply = "vin_l1_l2_l12_l18",
+ },
+ },
+ {
+ .name = "l2",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_nldo,
+ .resource = QCOM_RPM_PM8921_LDO2,
+ .supply = "vin_l1_l2_l12_l18",
+ },
+ },
+ {
+ .name = "l3",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO3,
+ },
+ },
+ {
+ .name = "l4",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO4,
+ },
+ },
+ {
+ .name = "l5",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO5,
+ },
+ },
+ {
+ .name = "l6",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO6,
+ },
+ },
+ {
+ .name = "l7",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO7,
+ },
+ },
+ {
+ .name = "l8",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO8,
+ },
+ },
+ {
+ .name = "l9",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO9,
+ },
+ },
+ {
+ .name = "l10",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO10,
+ },
+ },
+ {
+ .name = "l11",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO11,
+ },
+ },
+ {
+ .name = "l12",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_nldo,
+ .resource = QCOM_RPM_PM8921_LDO12,
+ .supply = "vin_l1_l2_l12_l18",
+ },
+ },
+ {
+ .name = "l13",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO13,
+ },
+ },
+ {
+ .name = "l14",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO14,
+ },
+ },
+ {
+ .name = "l15",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO15,
+ },
+ },
+ {
+ .name = "l16",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO16,
+ },
+ },
+ {
+ .name = "l17",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO17,
+ },
+ },
+ {
+ .name = "l18",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_nldo,
+ .resource = QCOM_RPM_PM8921_LDO18,
+ .supply = "vin_l1_l2_l12_l18",
+ },
+ },
+ {
+ .name = "l21",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO21,
+ },
+ },
+ {
+ .name = "l22",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO22,
+ },
+ },
+ {
+ .name = "l23",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO23,
+ },
+ },
+ {
+ .name = "l24",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_nldo1200,
+ .resource = QCOM_RPM_PM8921_LDO24,
+ .supply = "vin_l24",
+ },
+ },
+ {
+ .name = "l25",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_nldo1200,
+ .resource = QCOM_RPM_PM8921_LDO25,
+ .supply = "vin_l25",
+ },
+ },
+ {
+ .name = "l26",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_nldo1200,
+ .resource = QCOM_RPM_PM8921_LDO26,
+ },
+ },
+ {
+ .name = "l27",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_nldo1200,
+ .resource = QCOM_RPM_PM8921_LDO27,
+ .supply = "vin_l27",
+ },
+ },
+ {
+ .name = "l28",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_nldo1200,
+ .resource = QCOM_RPM_PM8921_LDO28,
+ .supply = "vin_l28",
+ },
+ },
+ {
+ .name = "l29",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_pldo,
+ .resource = QCOM_RPM_PM8921_LDO29
+ },
+ },
+ {
+ .name = "lvs1",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_switch,
+ .resource = QCOM_RPM_PM8921_LVS1,
+ .supply = "vin_lvs_1_3_6",
+ },
+ },
+ {
+ .name = "lvs2",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_switch,
+ .resource = QCOM_RPM_PM8921_LVS2,
+ .supply = "vin_lvs2",
+ },
+ },
+ {
+ .name = "lvs3",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_switch,
+ .resource = QCOM_RPM_PM8921_LVS3,
+ .supply = "vin_lvs_1_3_6",
+ },
+ },
+ {
+ .name = "lvs4",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_switch,
+ .resource = QCOM_RPM_PM8921_LVS4,
+ .supply = "vin_lvs_4_5_7",
+ },
+ },
+ {
+ .name = "lvs5",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_switch,
+ .resource = QCOM_RPM_PM8921_LVS5,
+ .supply = "vin_lvs_4_5_7",
+ },
+ },
+ {
+ .name = "lvs6",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_switch,
+ .resource = QCOM_RPM_PM8921_LVS6,
+ .supply = "vin_lvs_1_3_6",
+ },
+ },
+ {
+ .name = "lvs7",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_switch,
+ .resource = QCOM_RPM_PM8921_LVS7,
+ .supply = "vin_lvs_4_5_7",
+ },
+ },
+ {
+ .name = "usb-switch",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_switch,
+ .resource = QCOM_RPM_USB_OTG_SWITCH,
+ },
+ },
+ {
+ .name = "hdmi-switch",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_switch,
+ .resource = QCOM_RPM_HDMI_SWITCH,
+ },
+ },
+ {
+ .name = "ncp",
+ .driver_data = &(struct qcom_rpm_reg_desc) {
+ .template = &pm8921_ncp,
+ .resource = QCOM_RPM_PM8921_NCP,
+ .supply = "vin_ncp",
+ },
+ },
+};
+
+static DEFINE_QCOM_RPM_OF_MATCH(pm8921_regs);
+
static const struct of_device_id rpm_of_match[] = {
- { .compatible = "qcom,rpm-pm8058-pldo", .data = &pm8058_pldo },
- { .compatible = "qcom,rpm-pm8058-nldo", .data = &pm8058_nldo },
- { .compatible = "qcom,rpm-pm8058-smps", .data = &pm8058_smps },
- { .compatible = "qcom,rpm-pm8058-ncp", .data = &pm8058_ncp },
- { .compatible = "qcom,rpm-pm8058-switch", .data = &pm8058_switch },
-
- { .compatible = "qcom,rpm-pm8901-pldo", .data = &pm8901_pldo },
- { .compatible = "qcom,rpm-pm8901-nldo", .data = &pm8901_nldo },
- { .compatible = "qcom,rpm-pm8901-ftsmps", .data = &pm8901_ftsmps },
- { .compatible = "qcom,rpm-pm8901-switch", .data = &pm8901_switch },
-
- { .compatible = "qcom,rpm-pm8921-pldo", .data = &pm8921_pldo },
- { .compatible = "qcom,rpm-pm8921-nldo", .data = &pm8921_nldo },
- { .compatible = "qcom,rpm-pm8921-nldo1200", .data = &pm8921_nldo1200 },
- { .compatible = "qcom,rpm-pm8921-smps", .data = &pm8921_smps },
- { .compatible = "qcom,rpm-pm8921-ftsmps", .data = &pm8921_ftsmps },
- { .compatible = "qcom,rpm-pm8921-ncp", .data = &pm8921_ncp },
- { .compatible = "qcom,rpm-pm8921-switch", .data = &pm8921_switch },
-
- { .compatible = "qcom,rpm-smb208", .data = &smb208_smps },
+ { .compatible = "qcom,rpm-pm8921-regulators", .data = &pm8921_regs_m },
{ }
};
MODULE_DEVICE_TABLE(of, rpm_of_match);
@@ -619,7 +939,8 @@ static int rpm_reg_set(struct qcom_rpm_reg *vreg,
return 0;
}
-static int rpm_reg_of_parse_freq(struct device *dev, struct qcom_rpm_reg *vreg)
+static int rpm_reg_of_parse_freq(struct device *dev, struct qcom_rpm_reg *vreg,
+ struct device_node *of_node)
{
static const int freq_table[] = {
19200000, 9600000, 6400000, 4800000, 3840000, 3200000, 2740000,
@@ -633,9 +954,10 @@ static int rpm_reg_of_parse_freq(struct device *dev, struct qcom_rpm_reg *vreg)
int i;
key = "qcom,switch-mode-frequency";
- ret = of_property_read_u32(dev->of_node, key, &freq);
+ ret = of_property_read_u32(of_node, key, &freq);
if (ret) {
- dev_err(dev, "regulator requires %s property\n", key);
+ dev_err(dev, "regulator %s requires %s property\n",
+ vreg->desc.name, key);
return -EINVAL;
}
@@ -646,88 +968,74 @@ static int rpm_reg_of_parse_freq(struct device *dev, struct qcom_rpm_reg *vreg)
}
}
- dev_err(dev, "invalid frequency %d\n", freq);
+ dev_err(dev, "regulator %s has invalid frequency %d\n", vreg->desc.name,
+ freq);
return -EINVAL;
}
-static int rpm_reg_probe(struct platform_device *pdev)
+static int rpm_regulator_register(struct platform_device *pdev,
+ struct of_regulator_match *match,
+ struct qcom_rpm *rpm)
{
+ struct qcom_rpm_reg_desc *rpm_desc = match->driver_data;
struct regulator_init_data *initdata;
- const struct qcom_rpm_reg *template;
- const struct of_device_id *match;
struct regulator_config config = { };
struct regulator_dev *rdev;
struct qcom_rpm_reg *vreg;
+ struct device_node *of_node = match->of_node;
const char *key;
u32 force_mode;
bool pwm;
u32 val;
int ret;
- match = of_match_device(rpm_of_match, &pdev->dev);
- template = match->data;
-
vreg = devm_kmalloc(&pdev->dev, sizeof(*vreg), GFP_KERNEL);
- if (!vreg) {
- dev_err(&pdev->dev, "failed to allocate vreg\n");
+ if (!vreg)
return -ENOMEM;
- }
- memcpy(vreg, template, sizeof(*vreg));
+
+ memcpy(vreg, rpm_desc->template, sizeof(*vreg));
mutex_init(&vreg->lock);
vreg->dev = &pdev->dev;
vreg->desc.id = -1;
vreg->desc.owner = THIS_MODULE;
vreg->desc.type = REGULATOR_VOLTAGE;
- vreg->desc.name = pdev->dev.of_node->name;
- vreg->desc.supply_name = "vin";
-
+ vreg->desc.name = of_node->name;
+ vreg->desc.supply_name = rpm_desc->supply;
vreg->rpm = dev_get_drvdata(pdev->dev.parent);
- if (!vreg->rpm) {
- dev_err(&pdev->dev, "unable to retrieve handle to rpm\n");
- return -ENODEV;
- }
-
- initdata = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
- &vreg->desc);
- if (!initdata)
- return -EINVAL;
-
- key = "reg";
- ret = of_property_read_u32(pdev->dev.of_node, key, &val);
- if (ret) {
- dev_err(&pdev->dev, "failed to read %s\n", key);
- return ret;
- }
- vreg->resource = val;
+ vreg->resource = rpm_desc->resource;
+ initdata = match->init_data;
if ((vreg->parts->uV.mask || vreg->parts->mV.mask) &&
(!initdata->constraints.min_uV || !initdata->constraints.max_uV)) {
- dev_err(&pdev->dev, "no voltage specified for regulator\n");
+ dev_err(&pdev->dev, "no voltage specified for regulator %s\n",
+ vreg->desc.name);
return -EINVAL;
}
key = "bias-pull-down";
- if (of_property_read_bool(pdev->dev.of_node, key)) {
+ if (of_property_read_bool(of_node, key)) {
ret = rpm_reg_set(vreg, &vreg->parts->pd, 1);
if (ret) {
- dev_err(&pdev->dev, "%s is invalid", key);
+ dev_err(&pdev->dev, "%s is invalid (%s)", key,
+ vreg->desc.name);
return ret;
}
}
if (vreg->parts->freq.mask) {
- ret = rpm_reg_of_parse_freq(&pdev->dev, vreg);
+ ret = rpm_reg_of_parse_freq(&pdev->dev, vreg, of_node);
if (ret < 0)
return ret;
}
if (vreg->parts->pm.mask) {
key = "qcom,power-mode-hysteretic";
- pwm = !of_property_read_bool(pdev->dev.of_node, key);
+ pwm = !of_property_read_bool(of_node, key);
ret = rpm_reg_set(vreg, &vreg->parts->pm, pwm);
if (ret) {
- dev_err(&pdev->dev, "failed to set power mode\n");
+ dev_err(&pdev->dev, "failed to set power mode (%s)\n",
+ vreg->desc.name);
return ret;
}
}
@@ -736,11 +1044,12 @@ static int rpm_reg_probe(struct platform_device *pdev)
force_mode = -1;
key = "qcom,force-mode";
- ret = of_property_read_u32(pdev->dev.of_node, key, &val);
+ ret = of_property_read_u32(of_node, key, &val);
if (ret == -EINVAL) {
val = QCOM_RPM_FORCE_MODE_NONE;
} else if (ret < 0) {
- dev_err(&pdev->dev, "failed to read %s\n", key);
+ dev_err(&pdev->dev, "failed to read %s (%s)\n", key,
+ vreg->desc.name);
return ret;
}
@@ -775,13 +1084,15 @@ static int rpm_reg_probe(struct platform_device *pdev)
}
if (force_mode == -1) {
- dev_err(&pdev->dev, "invalid force mode\n");
+ dev_err(&pdev->dev, "invalid force mode (%s)\n",
+ vreg->desc.name);
return -EINVAL;
}
ret = rpm_reg_set(vreg, &vreg->parts->fm, force_mode);
if (ret) {
- dev_err(&pdev->dev, "failed to set force mode\n");
+ dev_err(&pdev->dev, "failed to set force mode (%s)\n",
+ vreg->desc.name);
return ret;
}
}
@@ -789,11 +1100,48 @@ static int rpm_reg_probe(struct platform_device *pdev)
config.dev = &pdev->dev;
config.init_data = initdata;
config.driver_data = vreg;
- config.of_node = pdev->dev.of_node;
+ config.of_node = of_node;
+
rdev = devm_regulator_register(&pdev->dev, &vreg->desc, &config);
- if (IS_ERR(rdev)) {
- dev_err(&pdev->dev, "can't register regulator\n");
- return PTR_ERR(rdev);
+
+ return PTR_ERR_OR_ZERO(rdev);
+}
+
+static int rpm_reg_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *match;
+ const struct qcom_rpm_of_match *rpm_match;
+ struct of_regulator_match *of_match;
+ struct qcom_rpm *rpm;
+ int ret;
+
+ rpm = dev_get_drvdata(pdev->dev.parent);
+ if (!rpm) {
+ dev_err(&pdev->dev, "unable to retrieve handle to rpm\n");
+ return -ENODEV;
+ }
+
+ match = of_match_device(rpm_of_match, &pdev->dev);
+ rpm_match = match->data;
+ of_match = rpm_match->of_match;
+
+ ret = of_regulator_match(&pdev->dev, pdev->dev.of_node,
+ of_match,
+ rpm_match->size);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "Error parsing regulator init data: %d\n", ret);
+ return ret;
+ }
+
+ for (; of_match < rpm_match->of_match + rpm_match->size; of_match++) {
+ if (!of_match->of_node)
+ continue;
+ ret = rpm_regulator_register(pdev, of_match, rpm);
+ if (ret) {
+ dev_err(&pdev->dev, "can't register regulator\n");
+ return ret;
+ }
}
return 0;
--
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