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Message-ID: <d14cc796-8644-41a3-5135-299bd8820204@gmail.com>
Date: Sat, 29 Sep 2018 02:51:11 +0300
From: Dmitry Osipenko <digetx@...il.com>
To: Tony Lindgren <tony@...mide.com>
Cc: Maciej Purski <m.purski@...sung.com>,
Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
Carlos Hernandez <ceh@...com>,
Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH] regulator: core: Pass max_uV value to
regulator_set_voltage_rdev
On 9/29/18 2:17 AM, Dmitry Osipenko wrote:
> On 9/29/18 1:41 AM, Tony Lindgren wrote:
>> * Dmitry Osipenko <digetx@...il.com> [180928 22:31]:
>>> On 9/28/18 11:22 PM, Tony Lindgren wrote:
>>>> * Dmitry Osipenko <digetx@...il.com> [180928 20:13]:
>>>>> Tony, could you please give a try to the patch below?
>>>>>
>>>>> Do the following:
>>>>>
>>>>> 1) git cherry-pick 696861761a58d8c93605b5663824929fb6540f16
>>>>> 2) git cherry-pick 456e7cdf3b1a14e2606b8b687385ab2e3f23a49a
>>>>> 3) Apply this patch:
>>>>
>>>> Seems to be getting closer, system boots up and starts
>>>> init, but then I start getting tons of this on beagle-x15:
>>>
>>> Tony, could you please try this one? Fixed couple more bugs, should be good now.
>>
>> I'm still getting these errors after init:
>
> Thank you very much again, seems I got what's wrong with your case. The ti-abb-regulator driver sets the "abb->current_info_idx = -EINVAL" on probe and that value is getting updated only after the first voltage change, hence _regulator_get_voltage() returns -22.
>
> Please try this patch:
I've revised the patch and here is the current final version.
>From 0332e230568d5bba470f917f0b36dd9ef9e6e511 Mon Sep 17 00:00:00 2001
From: Dmitry Osipenko <digetx@...il.com>
Date: Fri, 28 Sep 2018 21:49:20 +0300
Subject: [PATCH] Fixup regulator_balance_voltage() v4
---
drivers/regulator/core.c | 58 +++++++++++++++++++++++-----------------
1 file changed, 34 insertions(+), 24 deletions(-)
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 282511508698..17dce370f236 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -3099,10 +3099,6 @@ static int regulator_set_voltage_unlocked(struct regulator *regulator,
voltage->min_uV = min_uV;
voltage->max_uV = max_uV;
- ret = regulator_check_consumers(rdev, &min_uV, &max_uV, state);
- if (ret < 0)
- goto out2;
-
/* for not coupled regulators this will just set the voltage */
ret = regulator_balance_voltage(rdev, state);
if (ret < 0)
@@ -3187,7 +3183,9 @@ static int regulator_set_voltage_rdev(struct regulator_dev *rdev, int min_uV,
return ret;
}
-static int regulator_get_optimal_voltage(struct regulator_dev *rdev)
+static int regulator_get_optimal_voltage(struct regulator_dev *rdev,
+ int *min_uV, int *max_uV,
+ suspend_state_t state)
{
struct coupling_desc *c_desc = &rdev->coupling_desc;
struct regulator_dev **c_rdevs = c_desc->coupled_rdevs;
@@ -3202,7 +3200,8 @@ static int regulator_get_optimal_voltage(struct regulator_dev *rdev)
desired_max_uV = rdev->constraints->max_uV;
ret = regulator_check_consumers(rdev,
&desired_min_uV,
- &desired_max_uV, PM_SUSPEND_ON);
+ &desired_max_uV,
+ state);
if (ret < 0)
goto out;
@@ -3210,8 +3209,10 @@ static int regulator_get_optimal_voltage(struct regulator_dev *rdev)
* If there are no coupled regulators, simply set the voltage demanded
* by consumers.
*/
- if (n_coupled == 1) {
- ret = desired_min_uV;
+ if (n_coupled == 1 || state != PM_SUSPEND_ON) {
+ *min_uV = desired_min_uV;
+ *max_uV = desired_max_uV;
+ ret = 1;
goto out;
}
@@ -3285,8 +3286,10 @@ static int regulator_get_optimal_voltage(struct regulator_dev *rdev)
ret = -EINVAL;
goto out;
}
- ret = possible_uV;
+ ret = (possible_uV == desired_min_uV);
+ *min_uV = possible_uV;
+ *max_uV = desired_max_uV;
out:
return ret;
}
@@ -3298,7 +3301,8 @@ static int regulator_balance_voltage(struct regulator_dev *rdev,
struct regulator_dev *best_rdev;
struct coupling_desc *c_desc = &rdev->coupling_desc;
int n_coupled;
- int i, best_delta, best_uV, ret = 1;
+ int i, best_delta, best_min_uV, best_max_uV, ret = 1;
+ bool last = false;
c_rdevs = c_desc->coupled_rdevs;
n_coupled = c_desc->n_coupled;
@@ -3314,9 +3318,10 @@ static int regulator_balance_voltage(struct regulator_dev *rdev,
* Find the best possible voltage change on each loop. Leave the loop
* if there isn't any possible change.
*/
- while (1) {
+ while (!last) {
best_delta = 0;
- best_uV = 0;
+ best_min_uV = 0;
+ best_max_uV = 0;
best_rdev = NULL;
/*
@@ -3330,24 +3335,29 @@ static int regulator_balance_voltage(struct regulator_dev *rdev,
* max_spread constraint in order to balance
* the coupled voltages.
*/
- int optimal_uV, current_uV;
+ int optimal_uV, optimal_max_uV, current_uV = 0;
- optimal_uV = regulator_get_optimal_voltage(c_rdevs[i]);
- if (optimal_uV < 0) {
- ret = optimal_uV;
+ ret = regulator_get_optimal_voltage(c_rdevs[i],
+ &optimal_uV,
+ &optimal_max_uV,
+ state);
+ if (ret < 0)
goto out;
- }
- current_uV = _regulator_get_voltage(c_rdevs[i]);
- if (current_uV < 0) {
- ret = optimal_uV;
- goto out;
+ if (n_coupled > 1) {
+ current_uV = _regulator_get_voltage(c_rdevs[i]);
+ if (current_uV < 0) {
+ ret = current_uV;
+ goto out;
+ }
}
if (abs(best_delta) < abs(optimal_uV - current_uV)) {
best_delta = optimal_uV - current_uV;
best_rdev = c_rdevs[i];
- best_uV = optimal_uV;
+ best_min_uV = optimal_uV;
+ best_max_uV = optimal_max_uV;
+ last = (best_rdev == rdev && ret > 0);
}
}
@@ -3357,8 +3367,8 @@ static int regulator_balance_voltage(struct regulator_dev *rdev,
goto out;
}
- ret = regulator_set_voltage_rdev(best_rdev, best_uV,
- best_uV, state);
+ ret = regulator_set_voltage_rdev(best_rdev, best_min_uV,
+ best_max_uV, state);
if (ret < 0)
goto out;
--
2.19.0
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