diff options
author | Nishanth Menon <nm@ti.com> | 2011-07-27 16:02:32 -0400 |
---|---|---|
committer | Kevin Hilman <khilman@ti.com> | 2011-10-04 12:52:22 -0400 |
commit | 1f8a7d5207a2a343af7c3b18fcc65dc6aa1fb068 (patch) | |
tree | 69e6bbeb81fe4c7341960b7ea1909b85800d913a /arch/arm/plat-omap | |
parent | c541c15fb5ab48c47bc9b90121538fd30d152f23 (diff) |
ARM: OMAP: omap_device: Add omap_device_get_by_hwmod_name
An API which translates a standard hwmod name to corresponding
platform_device is useful for drivers when they need to look up the
device associated with a hwmod name to map back into the device
structure pointers. These ideally should be used by drivers in
mach directory. Using a generic hwmod name like "gpu" instead of
the actual device name which could change in the future, allows
us to:
a) Could in effect help replace apis such as omap2_get_mpuss_device,
omap2_get_iva_device, omap2_get_l3_device, omap4_get_dsp_device,
etc..
b) Scale to more devices rather than be restricted to named functions
c) Simplify driver's platform_data from passing additional fields
all doing the same thing with different function pointer names
just for accessing a different device name.
Signed-off-by: Nishanth Menon <nm@ti.com>
[b-cousson@ti.com: Adapt it to the new pdev pointer inside od,
remove the unneeded helpers, and fold the next patch here]
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
Diffstat (limited to 'arch/arm/plat-omap')
-rw-r--r-- | arch/arm/plat-omap/include/plat/omap_device.h | 1 | ||||
-rw-r--r-- | arch/arm/plat-omap/omap_device.c | 36 |
2 files changed, 37 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/include/plat/omap_device.h b/arch/arm/plat-omap/include/plat/omap_device.h index d4d9b96f961e..12c5b0c345bf 100644 --- a/arch/arm/plat-omap/include/plat/omap_device.h +++ b/arch/arm/plat-omap/include/plat/omap_device.h | |||
@@ -101,6 +101,7 @@ struct platform_device *omap_device_build_ss(const char *pdev_name, int pdev_id, | |||
101 | int pm_lats_cnt, int is_early_device); | 101 | int pm_lats_cnt, int is_early_device); |
102 | 102 | ||
103 | void __iomem *omap_device_get_rt_va(struct omap_device *od); | 103 | void __iomem *omap_device_get_rt_va(struct omap_device *od); |
104 | struct device *omap_device_get_by_hwmod_name(const char *oh_name); | ||
104 | 105 | ||
105 | /* OMAP PM interface */ | 106 | /* OMAP PM interface */ |
106 | int omap_device_align_pm_lat(struct platform_device *pdev, | 107 | int omap_device_align_pm_lat(struct platform_device *pdev, |
diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c index 26aee5cc1fc1..f832f92013b2 100644 --- a/arch/arm/plat-omap/omap_device.c +++ b/arch/arm/plat-omap/omap_device.c | |||
@@ -844,6 +844,42 @@ void __iomem *omap_device_get_rt_va(struct omap_device *od) | |||
844 | return omap_hwmod_get_mpu_rt_va(od->hwmods[0]); | 844 | return omap_hwmod_get_mpu_rt_va(od->hwmods[0]); |
845 | } | 845 | } |
846 | 846 | ||
847 | /** | ||
848 | * omap_device_get_by_hwmod_name() - convert a hwmod name to | ||
849 | * device pointer. | ||
850 | * @oh_name: name of the hwmod device | ||
851 | * | ||
852 | * Returns back a struct device * pointer associated with a hwmod | ||
853 | * device represented by a hwmod_name | ||
854 | */ | ||
855 | struct device *omap_device_get_by_hwmod_name(const char *oh_name) | ||
856 | { | ||
857 | struct omap_hwmod *oh; | ||
858 | |||
859 | if (!oh_name) { | ||
860 | WARN(1, "%s: no hwmod name!\n", __func__); | ||
861 | return ERR_PTR(-EINVAL); | ||
862 | } | ||
863 | |||
864 | oh = omap_hwmod_lookup(oh_name); | ||
865 | if (IS_ERR_OR_NULL(oh)) { | ||
866 | WARN(1, "%s: no hwmod for %s\n", __func__, | ||
867 | oh_name); | ||
868 | return ERR_PTR(oh ? PTR_ERR(oh) : -ENODEV); | ||
869 | } | ||
870 | if (IS_ERR_OR_NULL(oh->od)) { | ||
871 | WARN(1, "%s: no omap_device for %s\n", __func__, | ||
872 | oh_name); | ||
873 | return ERR_PTR(oh->od ? PTR_ERR(oh->od) : -ENODEV); | ||
874 | } | ||
875 | |||
876 | if (IS_ERR_OR_NULL(oh->od->pdev)) | ||
877 | return ERR_PTR(oh->od->pdev ? PTR_ERR(oh->od->pdev) : -ENODEV); | ||
878 | |||
879 | return &oh->od->pdev->dev; | ||
880 | } | ||
881 | EXPORT_SYMBOL(omap_device_get_by_hwmod_name); | ||
882 | |||
847 | /* | 883 | /* |
848 | * Public functions intended for use in omap_device_pm_latency | 884 | * Public functions intended for use in omap_device_pm_latency |
849 | * .activate_func and .deactivate_func function pointers | 885 | * .activate_func and .deactivate_func function pointers |