Provide a function in pdata to allow dss submodules to check if a given clock is available on a platform as an optional clock.
Signed-off-by: Senthilvadivu Guruswamy <[email protected]> (based on implementation from Senthil) Signed-off-by: Sumit Semwal <[email protected]> --- arch/arm/mach-omap2/display.c | 20 ++++++++++++++++++++ arch/arm/plat-omap/include/plat/display.h | 2 ++ 2 files changed, 22 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c index 5ab6a74..9f4f862 100644 --- a/arch/arm/mach-omap2/display.c +++ b/arch/arm/mach-omap2/display.c @@ -42,6 +42,25 @@ static struct omap_device_pm_latency omap_dss_latency[] = { }, }; +static bool opt_clock_available(const char *clk_role) +{ + int i; + struct omap_hwmod *oh; + + /* opt_clks are always associated with dss hwmod */ + oh = omap_hwmod_lookup("dss_core"); + if (!oh) { + pr_err("Could not look up dss_core.\n"); + return -ENODEV; + } + + for (i = 0; i < oh->opt_clks_cnt; i++) { + if (!strcmp(oh->opt_clks[i].role, clk_role)) + return true; + } + return false; +} + int __init omap_display_init(struct omap_dss_board_info *board_data) { int r = 0; @@ -76,6 +95,7 @@ int __init omap_display_init(struct omap_dss_board_info *board_data) pdata.board_data = board_data; pdata.board_data->get_last_off_on_transaction_id = NULL; + pdata.opt_clock_available = opt_clock_available; for (i = 0; i < oh_count; i++) { oh = omap_hwmod_lookup(oh_name[i]); diff --git a/arch/arm/plat-omap/include/plat/display.h b/arch/arm/plat-omap/include/plat/display.h index 2fb057e..4101bcd 100644 --- a/arch/arm/plat-omap/include/plat/display.h +++ b/arch/arm/plat-omap/include/plat/display.h @@ -240,6 +240,8 @@ static inline int omap_display_init(struct omap_dss_board_info *board_data) struct omap_display_platform_data { struct omap_dss_board_info *board_data; /* TODO: Additional members to be added when PM is considered */ + + bool (*opt_clock_available)(const char *clk_role); }; struct omap_video_timings { -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
