Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 1f8a7d52 authored by Nishanth Menon's avatar Nishanth Menon Committed by Kevin Hilman
Browse files

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: default avatarNishanth 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: default avatarBenoit Cousson <b-cousson@ti.com>
Signed-off-by: default avatarKevin Hilman <khilman@ti.com>
parent c541c15f

arch/arm/plat-omap/include/plat/omap_device.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -101,6 +101,7 @@ struct platform_device *omap_device_build_ss(const char *pdev_name, int pdev_id, 
					 int pm_lats_cnt, int is_early_device);

					 int pm_lats_cnt, int is_early_device);





void __iomem *omap_device_get_rt_va(struct omap_device *od);

void __iomem *omap_device_get_rt_va(struct omap_device *od);

struct device *omap_device_get_by_hwmod_name(const char *oh_name);





/* OMAP PM interface */

/* OMAP PM interface */

int omap_device_align_pm_lat(struct platform_device *pdev,

int omap_device_align_pm_lat(struct platform_device *pdev,

arch/arm/plat-omap/omap_device.c

+36 −0
Original line number Original line Diff line number Diff line
@@ -844,6 +844,42 @@ void __iomem *omap_device_get_rt_va(struct omap_device *od) 
	return omap_hwmod_get_mpu_rt_va(od->hwmods[0]);

	return omap_hwmod_get_mpu_rt_va(od->hwmods[0]);

}

}





/**

 * omap_device_get_by_hwmod_name() - convert a hwmod name to

 * device pointer.

 * @oh_name: name of the hwmod device

 *

 * Returns back a struct device * pointer associated with a hwmod

 * device represented by a hwmod_name

 */

struct device *omap_device_get_by_hwmod_name(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);

	}



	if (IS_ERR_OR_NULL(oh->od->pdev))

		return ERR_PTR(oh->od->pdev ? PTR_ERR(oh->od->pdev) : -ENODEV);



	return &oh->od->pdev->dev;

}

EXPORT_SYMBOL(omap_device_get_by_hwmod_name);



/*

/*

 * Public functions intended for use in omap_device_pm_latency

 * Public functions intended for use in omap_device_pm_latency

 * .activate_func and .deactivate_func function pointers

 * .activate_func and .deactivate_func function pointers