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 <svadivu@xxxxxx>
(based on implementation from Senthil)
Signed-off-by: Sumit Semwal <sumit.semwal@xxxxxx>
---
arch/arm/mach-omap2/display.c | 22 ++++++++++++++++++++++
arch/arm/plat-omap/include/plat/display.h | 2 ++
2 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
index 5ab6a74..6b1efc5 100644
--- a/arch/arm/mach-omap2/display.c
+++ b/arch/arm/mach-omap2/display.c
@@ -42,6 +42,20 @@ static struct omap_device_pm_latency omap_dss_latency[] = {
},
};
+/* oh_core is used for getting opt-clocks */
+static struct omap_hwmod *oh_core;
+
+static bool opt_clock_available(const char *clk_role)
+{
+ int i;
+
+ for (i = 0; i < oh_core->opt_clks_cnt; i++) {
+ if (!strcmp(oh_core->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;
@@ -73,9 +87,16 @@ int __init omap_display_init(struct omap_dss_board_info *board_data)
oh_count = ARRAY_SIZE(oh_name) - 2;
/* last 2 hwmod dev in oh_name are not available for omap3 */
+ /* opt_clks are always associated with dss hwmod */
+ oh_core = omap_hwmod_lookup("dss_core");
+ if (!oh_core) {
+ pr_err("Could not look up dss_core.\n");
+ return -ENODEV;
+ }
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]);
@@ -83,6 +104,7 @@ int __init omap_display_init(struct omap_dss_board_info *board_data)
pr_err("Could not look up %s\n", oh_name[i]);
return -ENODEV;
}
+
od = omap_device_build(dev_name[i], -1, oh, &pdata,
sizeof(struct omap_display_platform_data),
omap_dss_latency,
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
--
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