From: Basak, Partha <p-bas...@ti.com> 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 <ch...@ti.com> Signed-off-by: Basak, Partha <p-bas...@ti.com> Signed-off-by: Benoit Cousson <b-cous...@ti.com> Signed-off-by: Rajendra Nayak <rna...@ti.com> Cc: Paul Walmsley <p...@pwsan.com> Cc: Kevin Hilman <khil...@deeprootsystems.com> --- arch/arm/plat-omap/omap_device.c | 39 +++++++++++++++++++++++++++++++++++++- 1 files changed, 38 insertions(+), 1 deletions(-) diff --git a/arch/arm/plat-omap/omap_device.c b/arch/arm/plat-omap/omap_device.c index d2b1609..d876cec 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 +244,40 @@ 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>). + */ +static void _add_optional_clock_alias(struct omap_device *od, + struct omap_hwmod *oh) +{ + int i; + struct omap_hwmod_opt_clk *oc; + + for (i = oh->opt_clks_cnt, oc = oh->opt_clks; i > 0; i--, oc++) { + int ret; + + if (!oc->_clk || !IS_ERR(clk_get(&od->pdev.dev, oc->role))) + return; + + ret = clk_add_alias(oc->role, dev_name(&od->pdev.dev), + (char *)oc->clk, NULL); + if (ret) + pr_err("omap_device: clk_add_alias for %s failed\n", + oc->role); + } +} + /* Public functions for use by core code */ @@ -421,8 +456,10 @@ 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; -- 1.6.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
