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ARM: OMAP4: Add timer clock aliases for device-tree 

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-hunter@ti.com>
[paul@pwsan.com: updated to apply]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
This commit is contained in:
Jon Hunter 2012-09-22 02:24:15 -06:00 committed by Paul Walmsley
parent 4236bd0d7c
commit fabcf41f3c
1 changed files with 12 additions and 0 deletions
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12
arch/arm/mach-omap2/clock44xx_data.c
View File

@ -3316,6 +3316,7 @@ static struct omap_clk omap44xx_clks[] = {
CLK("usbhs_tll", "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),
@ -3327,6 +3328,17 @@ 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),
CLK(NULL, "cpufreq_ck", &dpll_mpu_ck, CK_443X),
};