hi,
On Fri, Jul 29, 2011 at 08:49:34AM -0500, Nishanth Menon wrote:
> From f03490456e24f72ca5272303c95a6f0b212494d5 Mon Sep 17 00:00:00 2001
> From: Nishanth Menon <nm@xxxxxx>
> Date: Wed, 27 Jul 2011 15:02:32 -0500
> Subject: [PATCH 1/2] OMAP: PM: omap_device: add omap_hwmod_name_get_odev
>
> An API which translates a standard hwmod name to corresponding
> omap_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.
>
> Change-Id: Ib42d22b4a929982c87a79866e3d7dc6e41073a6c
> Signed-off-by: Nishanth Menon <nm@xxxxxx>
> ---
> arch/arm/plat-omap/include/plat/omap_device.h | 1 +
> arch/arm/plat-omap/omap_device.c | 32 +++++++++++++++++++++++++
> 2 files changed, 33 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 70d31d0..7a3c046 100644
> --- a/arch/arm/plat-omap/include/plat/omap_device.h
> +++ b/arch/arm/plat-omap/include/plat/omap_device.h
> @@ -102,6 +102,7 @@ int omap_device_register(struct omap_device *od);
> int omap_early_device_register(struct omap_device *od);
>
> void __iomem *omap_device_get_rt_va(struct omap_device *od);
> +struct omap_device *omap_hwmod_name_get_odev(const char *oh_name);
>
> /* OMAP PM interface */
> 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 92b4496..21df532 100644
> --- a/arch/arm/plat-omap/omap_device.c
> +++ b/arch/arm/plat-omap/omap_device.c
> @@ -780,6 +780,38 @@ void __iomem *omap_device_get_rt_va(struct omap_device *od)
> return omap_hwmod_get_mpu_rt_va(od->hwmods[0]);
> }
>
> +/**
> + * omap_hwmod_name_get_odev() - convert a hwmod name to omap_device pointer
> + * @oh_name: name of the hwmod device
> + *
> + * returns back a struct omap_device * pointer associated with a hwmod
> + * device represented by a hwmod_name
> + */
> +struct omap_device *omap_hwmod_name_get_odev(const char *oh_name)
> +{
> + struct omap_hwmod *oh;
> +
> + if (!oh_name) {
> + WARN(1, "%s: no hwmod name!\n", __func__);
> + return ERR_PTR(-EINVAL);
> + }
> +
> + oh = omap_hwmod_lookup(oh_name);
> + if (IS_ERR_OR_NULL(oh)) {
> + WARN(1, "%s: no hwmod for %s\n", __func__,
> + oh_name);
> + return ERR_PTR(oh ? PTR_ERR(oh) : -ENODEV);
> + }
> + if (IS_ERR_OR_NULL(oh->od)) {
> + WARN(1, "%s: no omap_device for %s\n", __func__,
> + oh_name);
> + return ERR_PTR(oh->od ? PTR_ERR(oh->od) : -ENODEV);
> + }
> +
> + return oh->od;
> +}
> +EXPORT_SYMBOL(omap_hwmod_name_get_odev);
maybe EXPORT_SYMBOL_GPL() ?? Not sure we want non-GPL code to access
this ;-)
--
balbi
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