diff options
Diffstat (limited to 'extras/recipes-kernel/linux/linux-omap/dvfs/0007-OMAP-Introduce-API-in-the-OPP-layer-to-find-the-opp-.patch')
| -rw-r--r-- | extras/recipes-kernel/linux/linux-omap/dvfs/0007-OMAP-Introduce-API-in-the-OPP-layer-to-find-the-opp-.patch | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/extras/recipes-kernel/linux/linux-omap/dvfs/0007-OMAP-Introduce-API-in-the-OPP-layer-to-find-the-opp-.patch b/extras/recipes-kernel/linux/linux-omap/dvfs/0007-OMAP-Introduce-API-in-the-OPP-layer-to-find-the-opp-.patch new file mode 100644 index 00000000..58842f25 --- /dev/null +++ b/extras/recipes-kernel/linux/linux-omap/dvfs/0007-OMAP-Introduce-API-in-the-OPP-layer-to-find-the-opp-.patch @@ -0,0 +1,82 @@ +From dac6c4c03140835b758e32c72eb004d379c35fec Mon Sep 17 00:00:00 2001 +From: Thara Gopinath <thara@ti.com> +Date: Fri, 29 Oct 2010 20:43:10 +0530 +Subject: [PATCH 07/20] OMAP: Introduce API in the OPP layer to find the opp entry corresponding to a voltage. + +This patch adds an API in the opp layer to get the opp table entry +corresponding to the voltage passed as the parameter. + +Signed-off-by: Thara Gopinath <thara@ti.com> +--- + drivers/base/power/opp.c | 28 ++++++++++++++++++++++++++++ + include/linux/opp.h | 8 ++++++++ + 2 files changed, 36 insertions(+), 0 deletions(-) + +diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c +index 2bb9b4c..60b4478 100644 +--- a/drivers/base/power/opp.c ++++ b/drivers/base/power/opp.c +@@ -354,6 +354,34 @@ struct opp *opp_find_freq_floor(struct device *dev, unsigned long *freq) + } + + /** ++ * opp_find_voltage() - search for an exact voltage ++ * @dev: device pointer associated with the opp type ++ * @volt: voltage to search for ++ * ++ * Searches for exact match in the opp list and returns handle to the matching ++ * opp if found, else returns ERR_PTR in case of error and should be handled ++ * using IS_ERR. ++ */ ++struct opp *opp_find_voltage(struct device *dev, unsigned long volt) ++{ ++ struct device_opp *dev_opp; ++ struct opp *temp_opp, *opp = ERR_PTR(-ENODEV); ++ ++ dev_opp = find_device_opp(dev); ++ if (IS_ERR(dev_opp)) ++ return opp; ++ ++ list_for_each_entry_rcu(temp_opp, &dev_opp->opp_list, node) { ++ if (temp_opp->available && temp_opp->u_volt == volt) { ++ opp = temp_opp; ++ break; ++ } ++ } ++ ++ return opp; ++} ++ ++/** + * opp_add() - Add an OPP table from a table definitions + * @dev: device for which we do this operation + * @freq: Frequency in Hz for this OPP +diff --git a/include/linux/opp.h b/include/linux/opp.h +index 5449945..4977d5c 100644 +--- a/include/linux/opp.h ++++ b/include/linux/opp.h +@@ -34,6 +34,8 @@ struct opp *opp_find_freq_floor(struct device *dev, unsigned long *freq); + + struct opp *opp_find_freq_ceil(struct device *dev, unsigned long *freq); + ++struct opp *opp_find_voltage(struct device *dev, unsigned long volt); ++ + int opp_add(struct device *dev, unsigned long freq, unsigned long u_volt); + + int opp_enable(struct device *dev, unsigned long freq); +@@ -74,6 +76,12 @@ static inline struct opp *opp_find_freq_ceil(struct device *dev, + return ERR_PTR(-EINVAL); + } + ++static inline struct opp *opp_find_voltage(struct device *dev, ++ unsigned long volt) ++{ ++ return ERR_PTR(-EINVAL); ++} ++ + static inline int opp_add(struct device *dev, unsigned long freq, + unsigned long u_volt) + { +-- +1.6.6.1 + |