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authorViresh Kumar <viresh.kumar@linaro.org>2020-08-26 14:02:27 +0300
committerViresh Kumar <viresh.kumar@linaro.org>2020-09-16 11:32:33 +0300
commit0ff25c99042a56cd1580b381dd747a56286489cd (patch)
tree0af62d34373136b8332f4db11dbe48a240a87d6b /drivers/opp
parent4461269572e6fc216b63e2254c83035d1bc21eb7 (diff)
downloadlinux-0ff25c99042a56cd1580b381dd747a56286489cd.tar.xz
opp: Allow opp-supported-hw to contain multiple versions
The bindings allow multiple versions to be passed to "opp-supported-hw" property, either of which can result in enabling of the OPP. Update code to allow that. Tested-by: Stephan Gerhold <stephan@gerhold.net> Tested-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/opp')
-rw-r--r--drivers/opp/of.c47
1 files changed, 33 insertions, 14 deletions
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index 2f294c57ec06..aa829a569825 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -434,9 +434,9 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_of_find_icc_paths);
static bool _opp_is_supported(struct device *dev, struct opp_table *opp_table,
struct device_node *np)
{
- unsigned int count = opp_table->supported_hw_count;
- u32 version;
- int ret;
+ unsigned int levels = opp_table->supported_hw_count;
+ int count, versions, ret, i, j;
+ u32 val;
if (!opp_table->supported_hw) {
/*
@@ -451,21 +451,40 @@ static bool _opp_is_supported(struct device *dev, struct opp_table *opp_table,
return true;
}
- while (count--) {
- ret = of_property_read_u32_index(np, "opp-supported-hw", count,
- &version);
- if (ret) {
- dev_warn(dev, "%s: failed to read opp-supported-hw property at index %d: %d\n",
- __func__, count, ret);
- return false;
+ count = of_property_count_u32_elems(np, "opp-supported-hw");
+ if (count <= 0 || count % levels) {
+ dev_err(dev, "%s: Invalid opp-supported-hw property (%d)\n",
+ __func__, count);
+ return false;
+ }
+
+ versions = count / levels;
+
+ /* All levels in at least one of the versions should match */
+ for (i = 0; i < versions; i++) {
+ bool supported = true;
+
+ for (j = 0; j < levels; j++) {
+ ret = of_property_read_u32_index(np, "opp-supported-hw",
+ i * levels + j, &val);
+ if (ret) {
+ dev_warn(dev, "%s: failed to read opp-supported-hw property at index %d: %d\n",
+ __func__, i * levels + j, ret);
+ return false;
+ }
+
+ /* Check if the level is supported */
+ if (!(val & opp_table->supported_hw[j])) {
+ supported = false;
+ break;
+ }
}
- /* Both of these are bitwise masks of the versions */
- if (!(version & opp_table->supported_hw[count]))
- return false;
+ if (supported)
+ return true;
}
- return true;
+ return false;
}
static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,