For OMAP4, the dmtimers are located in the Wake-up, ABE and Peripheral (PER)
power domains. Hence, when the dmtimer is configured to use the "timer_sys_ck"
as its functional clock the actual clock used is different depending on whether
the clock is in the Wake-up, ABE or PER domain. So when we look-up the dmtimer's
"timer_sys_ck" we need to specify the timer device name as well as clock alias
to find the right clock.
Currently, the device names for the timers have the format "omap_timer.X" where
X is the timer instance number. When using to device tree, the format of the
device name created by device-tree is different and has the format
"<reg-address>.<device-name>" (this is assuming that the device-tree "reg"
property is specified). This causes the look-up for the OMAP4 "timer_sys_ck" to
fail. To fix this add new timer clock alias for using device-tree.
Please note that adding a 2nd set of clock aliases for the same clocks to only
temporary until device-tree migration is complete. Then we can remove the legacy
aliases. Hence, I have marked the legacy aliases with a "TODO" to remove them.
Signed-off-by: Jon Hunter <jon-hun...@ti.com>
---
arch/arm/mach-omap2/clock44xx_data.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/arch/arm/mach-omap2/clock44xx_data.c
b/arch/arm/mach-omap2/clock44xx_data.c
index d7f55e4..7dfeaf0 100644
--- a/arch/arm/mach-omap2/clock44xx_data.c
+++ b/arch/arm/mach-omap2/clock44xx_data.c
@@ -3314,6 +3314,7 @@ static struct omap_clk omap44xx_clks[] = {
CLK("usbhs_omap", "usbtll_fck", &dummy_ck,
CK_443X),
CLK("omap_wdt", "ick", &dummy_ck,
CK_443X),
CLK(NULL, "timer_32k_ck", &sys_32k_ck, CK_443X),
+ /* TODO: Remove "omap_timer.X" aliases once DT migration is complete */
CLK("omap_timer.1", "timer_sys_ck", &sys_clkin_ck, CK_443X),
CLK("omap_timer.2", "timer_sys_ck", &sys_clkin_ck, CK_443X),
CLK("omap_timer.3", "timer_sys_ck", &sys_clkin_ck, CK_443X),
@@ -3325,6 +3326,17 @@ static struct omap_clk omap44xx_clks[] = {
CLK("omap_timer.6", "timer_sys_ck", &syc_clk_div_ck,
CK_443X),
CLK("omap_timer.7", "timer_sys_ck", &syc_clk_div_ck,
CK_443X),
CLK("omap_timer.8", "timer_sys_ck", &syc_clk_div_ck,
CK_443X),
+ CLK("4a318000.timer", "timer_sys_ck", &sys_clkin_ck, CK_443X),
+ CLK("48032000.timer", "timer_sys_ck", &sys_clkin_ck, CK_443X),
+ CLK("48034000.timer", "timer_sys_ck", &sys_clkin_ck, CK_443X),
+ CLK("48036000.timer", "timer_sys_ck", &sys_clkin_ck, CK_443X),
+ CLK("4803e000.timer", "timer_sys_ck", &sys_clkin_ck, CK_443X),
+ CLK("48086000.timer", "timer_sys_ck", &sys_clkin_ck, CK_443X),
+ CLK("48088000.timer", "timer_sys_ck", &sys_clkin_ck, CK_443X),
+ CLK("49038000.timer", "timer_sys_ck", &syc_clk_div_ck,
CK_443X),
+ CLK("4903a000.timer", "timer_sys_ck", &syc_clk_div_ck,
CK_443X),
+ CLK("4903c000.timer", "timer_sys_ck", &syc_clk_div_ck,
CK_443X),
+ CLK("4903e000.timer", "timer_sys_ck", &syc_clk_div_ck,
CK_443X),
};
int __init omap4xxx_clk_init(void)
--
1.7.9.5
--
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