diff options
Diffstat (limited to 'drivers/opp/core.c')
| -rw-r--r-- | drivers/opp/core.c | 99 |
1 files changed, 77 insertions, 22 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c index 0311b18319a4..73e9a3b2f29b 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -101,11 +101,55 @@ struct opp_table *_find_opp_table(struct device *dev) * representation in the OPP table and manage the clock configuration themselves * in an platform specific way. */ -static bool assert_single_clk(struct opp_table *opp_table) +static bool assert_single_clk(struct opp_table *opp_table, + unsigned int __always_unused index) { return !WARN_ON(opp_table->clk_count > 1); } +/* + * Returns true if clock table is large enough to contain the clock index. + */ +static bool assert_clk_index(struct opp_table *opp_table, + unsigned int index) +{ + return opp_table->clk_count > index; +} + +/* + * Returns true if bandwidth table is large enough to contain the bandwidth index. + */ +static bool assert_bandwidth_index(struct opp_table *opp_table, + unsigned int index) +{ + return opp_table->path_count > index; +} + +/** + * dev_pm_opp_get_bw() - Gets the bandwidth corresponding to an opp + * @opp: opp for which bandwidth has to be returned for + * @peak: select peak or average bandwidth + * @index: bandwidth index + * + * Return: bandwidth in kBps, else return 0 + */ +unsigned long dev_pm_opp_get_bw(struct dev_pm_opp *opp, bool peak, int index) +{ + if (IS_ERR_OR_NULL(opp)) { + pr_err("%s: Invalid parameters\n", __func__); + return 0; + } + + if (index >= opp->opp_table->path_count) + return 0; + + if (!opp->bandwidth) + return 0; + + return peak ? opp->bandwidth[index].peak : opp->bandwidth[index].avg; +} +EXPORT_SYMBOL_GPL(dev_pm_opp_get_bw); + /** * dev_pm_opp_get_voltage() - Gets the voltage corresponding to an opp * @opp: opp for which voltage has to be returned for @@ -499,12 +543,12 @@ static struct dev_pm_opp *_opp_table_find_key(struct opp_table *opp_table, unsigned long (*read)(struct dev_pm_opp *opp, int index), bool (*compare)(struct dev_pm_opp **opp, struct dev_pm_opp *temp_opp, unsigned long opp_key, unsigned long key), - bool (*assert)(struct opp_table *opp_table)) + bool (*assert)(struct opp_table *opp_table, unsigned int index)) { struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); /* Assert that the requirement is met */ - if (assert && !assert(opp_table)) + if (assert && !assert(opp_table, index)) return ERR_PTR(-EINVAL); mutex_lock(&opp_table->lock); @@ -532,7 +576,7 @@ _find_key(struct device *dev, unsigned long *key, int index, bool available, unsigned long (*read)(struct dev_pm_opp *opp, int index), bool (*compare)(struct dev_pm_opp **opp, struct dev_pm_opp *temp_opp, unsigned long opp_key, unsigned long key), - bool (*assert)(struct opp_table *opp_table)) + bool (*assert)(struct opp_table *opp_table, unsigned int index)) { struct opp_table *opp_table; struct dev_pm_opp *opp; @@ -555,7 +599,7 @@ _find_key(struct device *dev, unsigned long *key, int index, bool available, static struct dev_pm_opp *_find_key_exact(struct device *dev, unsigned long key, int index, bool available, unsigned long (*read)(struct dev_pm_opp *opp, int index), - bool (*assert)(struct opp_table *opp_table)) + bool (*assert)(struct opp_table *opp_table, unsigned int index)) { /* * The value of key will be updated here, but will be ignored as the @@ -568,7 +612,7 @@ static struct dev_pm_opp *_find_key_exact(struct device *dev, static struct dev_pm_opp *_opp_table_find_key_ceil(struct opp_table *opp_table, unsigned long *key, int index, bool available, unsigned long (*read)(struct dev_pm_opp *opp, int index), - bool (*assert)(struct opp_table *opp_table)) + bool (*assert)(struct opp_table *opp_table, unsigned int index)) { return _opp_table_find_key(opp_table, key, index, available, read, _compare_ceil, assert); @@ -577,7 +621,7 @@ static struct dev_pm_opp *_opp_table_find_key_ceil(struct opp_table *opp_table, static struct dev_pm_opp *_find_key_ceil(struct device *dev, unsigned long *key, int index, bool available, unsigned long (*read)(struct dev_pm_opp *opp, int index), - bool (*assert)(struct opp_table *opp_table)) + bool (*assert)(struct opp_table *opp_table, unsigned int index)) { return _find_key(dev, key, index, available, read, _compare_ceil, assert); @@ -586,7 +630,7 @@ static struct dev_pm_opp *_find_key_ceil(struct device *dev, unsigned long *key, static struct dev_pm_opp *_find_key_floor(struct device *dev, unsigned long *key, int index, bool available, unsigned long (*read)(struct dev_pm_opp *opp, int index), - bool (*assert)(struct opp_table *opp_table)) + bool (*assert)(struct opp_table *opp_table, unsigned int index)) { return _find_key(dev, key, index, available, read, _compare_floor, assert); @@ -647,7 +691,8 @@ struct dev_pm_opp * dev_pm_opp_find_freq_exact_indexed(struct device *dev, unsigned long freq, u32 index, bool available) { - return _find_key_exact(dev, freq, index, available, _read_freq, NULL); + return _find_key_exact(dev, freq, index, available, _read_freq, + assert_clk_index); } EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact_indexed); @@ -707,7 +752,8 @@ struct dev_pm_opp * dev_pm_opp_find_freq_ceil_indexed(struct device *dev, unsigned long *freq, u32 index) { - return _find_key_ceil(dev, freq, index, true, _read_freq, NULL); + return _find_key_ceil(dev, freq, index, true, _read_freq, + assert_clk_index); } EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil_indexed); @@ -760,7 +806,7 @@ struct dev_pm_opp * dev_pm_opp_find_freq_floor_indexed(struct device *dev, unsigned long *freq, u32 index) { - return _find_key_floor(dev, freq, index, true, _read_freq, NULL); + return _find_key_floor(dev, freq, index, true, _read_freq, assert_clk_index); } EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor_indexed); @@ -878,7 +924,8 @@ struct dev_pm_opp *dev_pm_opp_find_bw_ceil(struct device *dev, unsigned int *bw, unsigned long temp = *bw; struct dev_pm_opp *opp; - opp = _find_key_ceil(dev, &temp, index, true, _read_bw, NULL); + opp = _find_key_ceil(dev, &temp, index, true, _read_bw, + assert_bandwidth_index); *bw = temp; return opp; } @@ -909,7 +956,8 @@ struct dev_pm_opp *dev_pm_opp_find_bw_floor(struct device *dev, unsigned long temp = *bw; struct dev_pm_opp *opp; - opp = _find_key_floor(dev, &temp, index, true, _read_bw, NULL); + opp = _find_key_floor(dev, &temp, index, true, _read_bw, + assert_bandwidth_index); *bw = temp; return opp; } @@ -1480,11 +1528,6 @@ err: return ERR_PTR(ret); } -void _get_opp_table_kref(struct opp_table *opp_table) -{ - kref_get(&opp_table->kref); -} - static struct opp_table *_update_opp_table_clk(struct device *dev, struct opp_table *opp_table, bool getclk) @@ -1645,6 +1688,17 @@ static void _opp_table_kref_release(struct kref *kref) kfree(opp_table); } +void _get_opp_table_kref(struct opp_table *opp_table) +{ + kref_get(&opp_table->kref); +} + +void dev_pm_opp_get_opp_table_ref(struct opp_table *opp_table) +{ + _get_opp_table_kref(opp_table); +} +EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_table_ref); + void dev_pm_opp_put_opp_table(struct opp_table *opp_table) { kref_put_mutex(&opp_table->kref, _opp_table_kref_release, @@ -1679,6 +1733,7 @@ void dev_pm_opp_get(struct dev_pm_opp *opp) { kref_get(&opp->kref); } +EXPORT_SYMBOL_GPL(dev_pm_opp_get); void dev_pm_opp_put(struct dev_pm_opp *opp) { @@ -1702,7 +1757,7 @@ void dev_pm_opp_remove(struct device *dev, unsigned long freq) if (IS_ERR(opp_table)) return; - if (!assert_single_clk(opp_table)) + if (!assert_single_clk(opp_table, 0)) goto put_table; mutex_lock(&opp_table->lock); @@ -2054,7 +2109,7 @@ int _opp_add_v1(struct opp_table *opp_table, struct device *dev, unsigned long tol, u_volt = data->u_volt; int ret; - if (!assert_single_clk(opp_table)) + if (!assert_single_clk(opp_table, 0)) return -EINVAL; new_opp = _opp_allocate(opp_table); @@ -2810,7 +2865,7 @@ static int _opp_set_availability(struct device *dev, unsigned long freq, return r; } - if (!assert_single_clk(opp_table)) { + if (!assert_single_clk(opp_table, 0)) { r = -EINVAL; goto put_table; } @@ -2886,7 +2941,7 @@ int dev_pm_opp_adjust_voltage(struct device *dev, unsigned long freq, return r; } - if (!assert_single_clk(opp_table)) { + if (!assert_single_clk(opp_table, 0)) { r = -EINVAL; goto put_table; } |