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path: root/drivers/regulator/ti-abb-regulator.c
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Diffstat (limited to 'drivers/regulator/ti-abb-regulator.c')
-rw-r--r--drivers/regulator/ti-abb-regulator.c102
1 files changed, 42 insertions, 60 deletions
diff --git a/drivers/regulator/ti-abb-regulator.c b/drivers/regulator/ti-abb-regulator.c
index d8e3e1262bc..b187b6bba7a 100644
--- a/drivers/regulator/ti-abb-regulator.c
+++ b/drivers/regulator/ti-abb-regulator.c
@@ -279,8 +279,12 @@ static int ti_abb_set_opp(struct regulator_dev *rdev, struct ti_abb *abb,
ti_abb_rmw(regs->opp_sel_mask, info->opp_sel, regs->control_reg,
abb->base);
- /* program LDO VBB vset override if needed */
- if (abb->ldo_base)
+ /*
+ * program LDO VBB vset override if needed for !bypass mode
+ * XXX: Do not switch sequence - for !bypass, LDO override reset *must*
+ * be performed *before* switch to bias mode else VBB glitches.
+ */
+ if (abb->ldo_base && info->opp_sel != TI_ABB_NOMINAL_OPP)
ti_abb_program_ldovbb(dev, abb, info);
/* Initiate ABB ldo change */
@@ -295,6 +299,14 @@ static int ti_abb_set_opp(struct regulator_dev *rdev, struct ti_abb *abb,
if (ret)
goto out;
+ /*
+ * Reset LDO VBB vset override bypass mode
+ * XXX: Do not switch sequence - for bypass, LDO override reset *must*
+ * be performed *after* switch to bypass else VBB glitches.
+ */
+ if (abb->ldo_base && info->opp_sel == TI_ABB_NOMINAL_OPP)
+ ti_abb_program_ldovbb(dev, abb, info);
+
out:
return ret;
}
@@ -603,7 +615,7 @@ static int ti_abb_init_table(struct device *dev, struct ti_abb *abb,
pname, *volt_table, vset_mask);
continue;
}
- info->vset = efuse_val & vset_mask >> __ffs(vset_mask);
+ info->vset = (efuse_val & vset_mask) >> __ffs(vset_mask);
dev_dbg(dev, "[%d]v=%d vset=%x\n", i, *volt_table, info->vset);
check_abb:
switch (info->opp_sel) {
@@ -696,39 +708,31 @@ static int ti_abb_probe(struct platform_device *pdev)
match = of_match_device(ti_abb_of_match, dev);
if (!match) {
/* We do not expect this to happen */
- ret = -ENODEV;
dev_err(dev, "%s: Unable to match device\n", __func__);
- goto err;
+ return -ENODEV;
}
if (!match->data) {
- ret = -EINVAL;
dev_err(dev, "%s: Bad data in match\n", __func__);
- goto err;
+ return -EINVAL;
}
abb = devm_kzalloc(dev, sizeof(struct ti_abb), GFP_KERNEL);
- if (!abb) {
- dev_err(dev, "%s: Unable to allocate ABB struct\n", __func__);
- ret = -ENOMEM;
- goto err;
- }
+ if (!abb)
+ return -ENOMEM;
abb->regs = match->data;
/* Map ABB resources */
pname = "base-address";
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname);
abb->base = devm_ioremap_resource(dev, res);
- if (IS_ERR(abb->base)) {
- ret = PTR_ERR(abb->base);
- goto err;
- }
+ if (IS_ERR(abb->base))
+ return PTR_ERR(abb->base);
pname = "int-address";
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname);
if (!res) {
dev_err(dev, "Missing '%s' IO resource\n", pname);
- ret = -ENODEV;
- goto err;
+ return -ENODEV;
}
/*
* We may have shared interrupt register offsets which are
@@ -738,8 +742,7 @@ static int ti_abb_probe(struct platform_device *pdev)
resource_size(res));
if (!abb->int_base) {
dev_err(dev, "Unable to map '%s'\n", pname);
- ret = -ENOMEM;
- goto err;
+ return -ENOMEM;
}
/* Map Optional resources */
@@ -759,17 +762,19 @@ static int ti_abb_probe(struct platform_device *pdev)
resource_size(res));
if (!abb->efuse_base) {
dev_err(dev, "Unable to map '%s'\n", pname);
- ret = -ENOMEM;
- goto err;
+ return -ENOMEM;
}
pname = "ldo-address";
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname);
- abb->ldo_base = devm_ioremap_resource(dev, res);
- if (IS_ERR(abb->ldo_base)) {
- ret = PTR_ERR(abb->ldo_base);
- goto err;
+ if (!res) {
+ dev_dbg(dev, "Missing '%s' IO resource\n", pname);
+ ret = -ENODEV;
+ goto skip_opt;
}
+ abb->ldo_base = devm_ioremap_resource(dev, res);
+ if (IS_ERR(abb->ldo_base))
+ return PTR_ERR(abb->ldo_base);
/* IF ldo_base is set, the following are mandatory */
pname = "ti,ldovbb-override-mask";
@@ -778,12 +783,11 @@ static int ti_abb_probe(struct platform_device *pdev)
&abb->ldovbb_override_mask);
if (ret) {
dev_err(dev, "Missing '%s' (%d)\n", pname, ret);
- goto err;
+ return ret;
}
if (!abb->ldovbb_override_mask) {
dev_err(dev, "Invalid property:'%s' set as 0!\n", pname);
- ret = -EINVAL;
- goto err;
+ return -EINVAL;
}
pname = "ti,ldovbb-vset-mask";
@@ -792,12 +796,11 @@ static int ti_abb_probe(struct platform_device *pdev)
&abb->ldovbb_vset_mask);
if (ret) {
dev_err(dev, "Missing '%s' (%d)\n", pname, ret);
- goto err;
+ return ret;
}
if (!abb->ldovbb_vset_mask) {
dev_err(dev, "Invalid property:'%s' set as 0!\n", pname);
- ret = -EINVAL;
- goto err;
+ return -EINVAL;
}
skip_opt:
@@ -807,31 +810,29 @@ skip_opt:
&abb->txdone_mask);
if (ret) {
dev_err(dev, "Missing '%s' (%d)\n", pname, ret);
- goto err;
+ return ret;
}
if (!abb->txdone_mask) {
dev_err(dev, "Invalid property:'%s' set as 0!\n", pname);
- ret = -EINVAL;
- goto err;
+ return -EINVAL;
}
initdata = of_get_regulator_init_data(dev, pdev->dev.of_node);
if (!initdata) {
- ret = -ENOMEM;
dev_err(dev, "%s: Unable to alloc regulator init data\n",
__func__);
- goto err;
+ return -ENOMEM;
}
/* init ABB opp_sel table */
ret = ti_abb_init_table(dev, abb, initdata);
if (ret)
- goto err;
+ return ret;
/* init ABB timing */
ret = ti_abb_init_timings(dev, abb);
if (ret)
- goto err;
+ return ret;
desc = &abb->rdesc;
desc->name = dev_name(dev);
@@ -849,12 +850,12 @@ skip_opt:
config.driver_data = abb;
config.of_node = pdev->dev.of_node;
- rdev = regulator_register(desc, &config);
+ rdev = devm_regulator_register(dev, desc, &config);
if (IS_ERR(rdev)) {
ret = PTR_ERR(rdev);
dev_err(dev, "%s: failed to register regulator(%d)\n",
__func__, ret);
- goto err;
+ return ret;
}
platform_set_drvdata(pdev, rdev);
@@ -862,31 +863,12 @@ skip_opt:
ti_abb_rmw(abb->regs->sr2_en_mask, 1, abb->regs->setup_reg, abb->base);
return 0;
-
-err:
- dev_err(dev, "%s: Failed to initialize(%d)\n", __func__, ret);
- return ret;
-}
-
-/**
- * ti_abb_remove() - cleanups
- * @pdev: ABB platform device
- *
- * Return: 0
- */
-static int ti_abb_remove(struct platform_device *pdev)
-{
- struct regulator_dev *rdev = platform_get_drvdata(pdev);
-
- regulator_unregister(rdev);
- return 0;
}
MODULE_ALIAS("platform:ti_abb");
static struct platform_driver ti_abb_driver = {
.probe = ti_abb_probe,
- .remove = ti_abb_remove,
.driver = {
.name = "ti_abb",
.owner = THIS_MODULE,
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-14 10:16:44 +0000