From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jon Hunter Subject: [RFC 3/4] ARM: OMAP4: Add timer clock aliases for device-tree Date: Fri, 13 Jul 2012 17:19:34 -0500 Message-ID: <1342217976-29802-5-git-send-email-jon-hunter@ti.com> References: <1342217976-29802-1-git-send-email-jon-hunter@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1342217976-29802-1-git-send-email-jon-hunter@ti.com> Sender: linux-omap-owner@vger.kernel.org To: Tarun Kanti DebBarma , Tony Lindgren , Rob Herring , Grant Likely , Paul Walmsley Cc: Benoit Cousson , linux-omap , linux-arm , device-tree , Jon Hunter List-Id: devicetree@vger.kernel.org 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 "." (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 --- 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