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author | Partha Basak <p-basak2@ti.com> | 2010-09-21 19:23:04 +0200 |
---|---|---|
committer | Paul Walmsley <paul@pwsan.com> | 2010-09-22 17:19:54 +0200 |
commit | 4ef7aca895b2d06c07ff9d5f378af84bbf757e43 (patch) | |
tree | 1d2b64960a1c93649b7a8f82cc99b4a08b0c7772 /arch/arm/plat-omap/omap_device.c | |
parent | OMAP: hwmod: Enable module wakeup if in smartidle (diff) | |
download | linux-4ef7aca895b2d06c07ff9d5f378af84bbf757e43.tar.xz linux-4ef7aca895b2d06c07ff9d5f378af84bbf757e43.zip |
OMAP: hwmod: Handle opt clocks node using clk_add_alias
For every optional clock present per hwmod per omap-device, this function
adds an entry in the clocks list of the form <dev-id=dev_name, con-id=role>,
if an entry is already present in the list of the form <dev-id=NULL, con-id=role>.
The function is called from within the framework inside omap_device_build_ss(),
after omap_device_register.
This allows drivers to get a pointer to its optional clocks based on its role
by calling clk_get(<dev*>, <role>).
Link to discussions related to this patch:
http://www.spinics.net/lists/linux-omap/msg34809.html
Signed-off-by: Charulatha V <charu@ti.com>
Signed-off-by: Partha Basak <p-basak2@ti.com>
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: simplified loop iterator; removed the superfluous clk_get(),
using the clk_get() in clk_add_alias() instead]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/plat-omap/omap_device.c')
-rw-r--r-- | arch/arm/plat-omap/omap_device.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c index d2b160942ccc..ceba58a47595 100644 --- a/arch/arm/plat-omap/omap_device.c +++ b/arch/arm/plat-omap/omap_device.c @@ -82,6 +82,7 @@ #include <linux/slab.h> #include <linux/err.h> #include <linux/io.h> +#include <linux/clk.h> #include <plat/omap_device.h> #include <plat/omap_hwmod.h> @@ -243,6 +244,44 @@ static inline struct omap_device *_find_by_pdev(struct platform_device *pdev) return container_of(pdev, struct omap_device, pdev); } +/** + * _add_optional_clock_alias - Add clock alias for hwmod optional clocks + * @od: struct omap_device *od + * + * For every optional clock present per hwmod per omap_device, this function + * adds an entry in the clocks list of the form <dev-id=dev_name, con-id=role> + * if an entry is already present in it with the form <dev-id=NULL, con-id=role> + * + * The function is called from inside omap_device_build_ss(), after + * omap_device_register. + * + * This allows drivers to get a pointer to its optional clocks based on its role + * by calling clk_get(<dev*>, <role>). + * + * No return value. + */ +static void _add_optional_clock_alias(struct omap_device *od, + struct omap_hwmod *oh) +{ + int i; + + for (i = 0; i < oh->opt_clks_cnt; i++) { + struct omap_hwmod_opt_clk *oc; + int r; + + oc = &oh->opt_clks[i]; + + if (!oc->_clk) + continue; + + r = clk_add_alias(oc->role, dev_name(&od->pdev.dev), + (char *)oc->clk, &od->pdev.dev); + if (r) + pr_err("omap_device: %s: clk_add_alias for %s failed\n", + dev_name(&od->pdev.dev), oc->role); + } +} + /* Public functions for use by core code */ @@ -421,8 +460,10 @@ struct omap_device *omap_device_build_ss(const char *pdev_name, int pdev_id, else ret = omap_device_register(od); - for (i = 0; i < oh_cnt; i++) + for (i = 0; i < oh_cnt; i++) { hwmods[i]->od = od; + _add_optional_clock_alias(od, hwmods[i]); + } if (ret) goto odbs_exit4; |