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2015-06-02ARM: OMAP2+: clock: remove dead definitions from the clock header fileTero Kristo
Cleanup the mess in clock.h by removing all definitions that are no longer used for anything. Signed-off-by: Tero Kristo <t-kristo@ti.com>
2011-03-07OMAP3: clock: use autoidle clkops for all autoidle-controllable interface clocksPaul Walmsley
Mark each interface clock with a corresponding CM_AUTOIDLE bit with a clkops that has the allow_idle/deny_idle function pointers populated. This allows the OMAP clock framework to enable and disable autoidle for these clocks. Signed-off-by: Paul Walmsley <paul@pwsan.com> Tested-by: Rajendra Nayak <rnayak@ti.com> Reviewed-by: Kevin Hilman <khilman@ti.com>
2010-02-24OMAP3/4 clock: split into per-chip family filesPaul Walmsley
clock34xx_data.c now contains data for the OMAP34xx family, the OMAP36xx family, and the OMAP3517 family, so rename it to clock3xxx_data.c. Rename clock34xx.c to clock3xxx.c, and move the chip family-specific clock functions to clock34xx.c, clock36xx.c, or clock3517.c, as appropriate. So now "clock3xxx.*" refers to the OMAP3 superset. The main goal here is to prepare to compile chip family-specific clock functions only for kernel builds that target that chip family. To get to that point, we also need to add CONFIG_SOC_* options for those other chip families; that will be done in future patches, planned for 2.6.35. OMAP4 is also affected by this. It duplicated the OMAP3 non-CORE DPLL clkops structure. The OMAP4 variant of this clkops structure has been removed, and since there was nothing else currently in clock44xx.c, it too has been removed -- it can always be added back later when there is some content for it. (The OMAP4 clock autogeneration scripts have been updated accordingly.) Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Benoît Cousson <b-cousson@ti.com> Cc: Rajendra Nayak <rnayak@ti.com> Cc: Ranjith Lohithakshan <ranjithl@ti.com> Cc: Tony Lindgren <tony@atomide.com>
2010-02-24OMAP3630: Clock: Workaround for DPLL HS divider limitationMike Turquette
This patch implements a workaround for the DPLL HS divider limitation in OMAP3630 as given by Errata ID: i556. Errata: When PWRDN bit is set, it resets the internal HSDIVIDER divide-by value (Mx). The reset value gets loaded instead of the previous value. The following HSDIVIDERs exhibit above behavior: . DPLL4 : M6 / M5 / M4 / M3 / M2 (CM_CLKEN_PLL[31:26] register bits) . DPLL3 : M3 (CM_CLKEN_PLL[12] register bit). Work Around: It is mandatory to apply the following sequence to ensure the write value will be loaded in DPLL HSDIVIDER FSM: The global sequence when using PWRDN bit is the following: . Disable Mx HSDIVIDER clock output related functional clock enable bits (in CM_FCLKEN_xxx / CM_ICLKEN_xxx) . Enable PWRDN bit of HSDIVIDER . Disable PWRDN bit of HSDIVIDER . Read current HSDIVIDER register value . Write different value in HSDIVIDER register . Write expected value in HSDIVIDER register . Enable Mx HSDIVIDER clock output related functional clocks (CM_FCLKEN_xxx / CM_ICLKEN_xxx) Signed-off-by: Mike Turquette <mturquette@ti.com> Signed-off-by: Vishwanath BS <vishwanath.bs@ti.com> Signed-off-by: Vijaykumar GN <vijaykumar.gn@ti.com> [paul@pwsan.com: updated patch to apply; made workaround function static; marked as being 36xx-specific] Signed-off-by: Paul Walmsley <paul@pwsan.com>
2010-02-24AM35xx: Add clock support for new modules on AM35xxRanjith Lohithakshan
This patch adds clock support for the following AM35xx modules - Ethernet MAC - CAN Controller (HECC) - New MUSB OTG Controller with integrated Phy - Video Processing Front End (VPFE) - Additional UART (UART4) Signed-off-by: Ranjith Lohithakshan <ranjithl@ti.com> Signed-off-by: Paul Walmsley <paul@pwsan.com>
2010-02-15omap3/4: Fix compile for multi-omap for clkops_noncore_dpll_opsTony Lindgren
Rename clkops_noncore_dpll_ops for omap3 and omap4. Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Acked-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-01-29OMAP2/3/4 clock: rename and clean the omap2_clk_init() functionsPaul Walmsley
Rename the omap2_clk_init() in the OMAP2, 3, and 4 clock code to be omap2xxx_clk_init(), omap3xxx_clk_init(), etc. Remove all traces of the (commented) old virt_prcm_set code from omap3xxx_clk_init() and omap4xxx_clk_init(), since this will be handled with the OPP code that is cooking in the PM branch. After this patch, there should be very little else in the clock code that blocks a multi-OMAP 2+3 kernel. (OMAP2420+OMAP2430 still has some outstanding issues that need to be resolved; this is pending on some additions to the hwmod data.) Signed-off-by: Paul Walmsley <paul@pwsan.com>
2009-12-11ARM: OMAP4: PM: Move DPLL control apis to dpll.cRajendra Nayak
This patch moves all the dpll control api's to a common file dpll.c. This is in preperation of omap4 support wherein most of these api's can be reused. Signed-off-by: Rajendra Nayak <rnayak@ti.com> Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Benoit Cousson <b-cousson@ti.com>
2009-12-11OMAP3 clock: convert clock34xx.h to clock34xx_data.cPaul Walmsley
The OMAP3 clock code currently #includes a large .h file full of static data structures. Instead, define the data in a .c file. Russell King <linux@arm.linux.org.uk> proposed this new arrangement: http://marc.info/?l=linux-omap&m=125967425908895&w=2 Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Russell King <linux@arm.linux.org.uk>
2009-11-22Merge 7xx-iosplit-plat-merge with omap-fixesTony Lindgren
Merge branch '7xx-iosplit-plat-merge' into omap-for-linus
2009-11-17omap3: clock: Fixed dpll3_m2x2 rate calculationTero Kristo
Current calculation does not take into account any changes to M2 divisor, and thus when we change VDD2 OPP, dpll3_m2x2 rate does not change. Fixed by re-routing dpll3_m2x2 parent to dpll3_m2. Signed-off-by: Tero Kristo <tero.kristo@nokia.com> Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-10-20omap: headers: Move remaining headers from include/mach to include/platTony Lindgren
Move the remaining headers under plat-omap/include/mach to plat-omap/include/plat. Also search and replace the files using these headers to include using the right path. This was done with: #!/bin/bash mach_dir_old="arch/arm/plat-omap/include/mach" plat_dir_new="arch/arm/plat-omap/include/plat" headers=$(cd $mach_dir_old && ls *.h) omap_dirs="arch/arm/*omap*/ \ drivers/video/omap \ sound/soc/omap" other_files="drivers/leds/leds-ams-delta.c \ drivers/mfd/menelaus.c \ drivers/mfd/twl4030-core.c \ drivers/mtd/nand/ams-delta.c" for header in $headers; do old="#include <mach\/$header" new="#include <plat\/$header" for dir in $omap_dirs; do find $dir -type f -name \*.[chS] | \ xargs sed -i "s/$old/$new/" done find drivers/ -type f -name \*omap*.[chS] | \ xargs sed -i "s/$old/$new/" for file in $other_files; do sed -i "s/$old/$new/" $file done done for header in $(ls $mach_dir_old/*.h); do git mv $header $plat_dir_new/ done Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-09-03OMAP3 clock: remove superfluous calls to omap2_init_clk_clkdmPaul Walmsley
omap2_init_clk_clkdm() is called as part of the chip architecture-specific initialization code, so calling it again from the struct clk init pointer just wastes cycles. Signed-off-by: Paul Walmsley <paul@pwsan.com>
2009-09-03OMAP clock: associate MPU clocks with the mpu_clkdmPaul Walmsley
All MPU-related clocks should be in the mpu_clkdm. This is needed for the upcoming omap_hwmod patches, which needs to know the clockdomain that arm_fck is in. Signed-off-by: Paul Walmsley <paul@pwsan.com>
2009-07-24OMAP3 clock: correct module IDLEST bits: SSI; DSS; USBHOST; HSOTGUSBPaul Walmsley
Fix two bugs in the OMAP3 clock tree pertaining to the SSI, DSS, USBHOST, and HSOTGUSB devices. These devices are both interconnect initiators and targets. Without this patch, clk_enable()s on clocks for these modules can be very high latency (potentially up to ~200 milliseconds) and message such as the following are generated: Clock usbhost_48m_fck didn't enable in 100000 tries Two bugs are fixed by this patch. First, OMAP hardware only supports target CM_IDLEST register bits on ES2+ chips and beyond. ES1 chips should not wait for these clocks to enable. So, split the appropriate clocks into ES1 and ES2+ variants, so that kernels running on ES1 devices won't try to wait. Second, the current heuristic in omap2_clk_dflt_find_idlest() will fail for these clocks. It assumes that the CM_IDLEST bit to wait upon is the same as the CM_*CLKEN bit, which is false[1]. Fix by implementing custom clkops .find_idlest function pointers for the appropriate clocks that return the correct slave IDLEST bit shift. This was originally fixed in the linux-omap kernel during 2.6.29 in a slightly different manner[2][3]. In the medium-term future, all of the module IDLEST code will eventually be moved to the omap_hwmod code. Problem reported by Jarkko Nikula <jhnikula@gmail.com>: http://marc.info/?l=linux-omap&m=124306184903679&w=2 ... 1. See for example 34xx TRM Revision P Table 4-213 and 4-217 (for the DSS case). 2. http://www.spinics.net/lists/linux-omap/msg05512.html et seq. 3. http://lkml.indiana.edu/hypermail/linux/kernel/0901.3/01498.html Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Jarkko Nikula <jhnikula@gmail.com>
2009-05-28OMAP3: PM: Add D2D clocks and auto-idle setup to PRCM initKevin Hilman
Add D2D clocks (modem_fck, sad2d_ick, mad2d_ick) to clock framework and ensure that auto-idle bits are set for these clocks during PRCM init. Also add omap3_d2d_idle() function called durint PRCM setup which ensures D2D pins are MUX'd correctly to enable retention for standalone (no-modem) devices. Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-05-25ARM: OMAP2/3: Remove OMAP_CM_REGADDRTony Lindgren
Processor specific macros should be used instead. Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-05-12ARM: OMAP: GPIO de-bounce clocks don't affect module idle statePaul Walmsley
GPIO de-bounce clocks don't have any impact on the module idle state, so the clock code should not wait for the module to enable after the de-bounce clocks are enabled. Problem found by Kevin Hilman <khilman@deeprootsystems.com>. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2009-04-23OMAP2/3 GPTIMER: allow system tick GPTIMER to be changed in board-*.c filesPaul Walmsley
Add a function omap2_gp_clockevent_set_gptimer() for board-*.c files to use in .init_irq functions to configure the system tick GPTIMER. Practical choices at this point are GPTIMER1 or GPTIMER12. Both of these timers are in the WKUP powerdomain, and so are unaffected by chip power management. GPTIMER1 can use sys_clk as a source, for applications where a high-resolution timer is more important than power management. GPTIMER12 has the special property that it has the secure 32kHz oscillator as its source clock, which may be less prone to glitches than the off-chip 32kHz oscillator. But on HS devices, it may not be available for Linux use. It appears that most boards are fine with GPTIMER1, but BeagleBoard should use GPTIMER12 when using a 32KiHz timer source, due to hardware bugs in revisions B4 and below. Modify board-omap3beagle.c to use GPTIMER12. This patch originally used a Kbuild config option to select the GPTIMER, but was changed to allow this to be specified in board-*.c files, per Tony's request. Kalle Vallo <kalle.valo@nokia.com> found a bug in an earlier version of this patch - thanks Kalle. Tested on Beagle rev B4 ES2.1, with and without CONFIG_OMAP_32K_TIMER, and 3430SDP. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Cc: Kalle Valo <kalle.valo@nokia.com>
2009-04-23OMAP3: clock: Camera module doesn't have IDLEST bitSergio Aguirre
This patch avoids waiting for the camera module to become ready, since it doesn't have IDLEST bit. Based on a earlier hack done by Paul Walmsley on Sep 9 2008 on linux-omap tree. Signed-off-by: Sergio Aguirre <saaguirre@ti.com> Signed-off-by: Paul Walmsley <paul@pwsan.com>
2009-02-19[ARM] omap: add support for bypassing DPLLsRussell King
This roughly corresponds with OMAP commits: 7d06c48, 3241b19, 88b5d9b, 18a5500, 9c909ac, 5c6497b, 8b1f0bd, 2ac1da8. For both OMAP2 and OMAP3, we note the reference and bypass clocks in the DPLL data structure. Whenever we modify the DPLL rate, we first ensure that both the reference and bypass clocks are enabled. Then, we decide whether to use the reference and DPLL, or the bypass clock if the desired rate is identical to the bypass rate, and program the DPLL appropriately. Finally, we update the clock's parent, and then disable the unused clocks. This keeps the parents correctly balanced, and more importantly ensures that the bypass clock is running whenever we reprogram the DPLL. This is especially important because the procedure for reprogramming the DPLL involves switching to the bypass clock. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-14[ARM] omap: arrange for clock recalc methods to return the rateRussell King
linux-omap source commit 33d000c99ee393fe2042f93e8422f94976d276ce introduces a way to "dry run" clock changes before they're committed. However, this involves putting logic to handle this into each and every recalc function, and unfortunately due to the caching, led to some bugs. Solve both of issues by making the recalc methods always return the clock rate for the clock, which the caller decides what to do with. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] omap: create a proper tree of clocksRussell King
Traditionally, we've tracked the parent/child relationships between clk structures by setting the child's parent member to point at the upstream clock. As a result, when decending the tree, we have had to scan all clocks to find the children. Avoid this wasteful scanning by keeping a list of the clock's children. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] OMAP3 clock: add omap3_core_dpll_m2_set_rate()Paul Walmsley
Add the omap3_core_dpll_m2_set_rate() function to the OMAP3 clock code, which calls into the SRAM function omap3_sram_configure_core_dpll() to change the CORE DPLL M2 divider. (SRAM code is necessary since rate changes on clocks upstream from the SDRC can glitch SDRAM accesses.) Use this function for the set_rate function pointer in the dpll3_m2_ck struct clk. With this function in place, PM/OPP code should be able to alter SDRAM speed via code similar to: clk_set_rate(&dpll3_m2_ck, target_rate). linux-omap source commit is 7f8b2b0f4fe52238c67d79dedcd2794dcef4dddd. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] OMAP3 clock: avoid invalid FREQSEL values during DPLL rate roundingPaul Walmsley
The DPLL FREQSEL jitter correction bits are set based on a table in the 34xx TRM, Table 4-38, according to the DPLL's internal clock frequency "Fint." Several Fint frequency ranges are missing from this table. Previously, we allowed these Fint frequency ranges to be selected in the rate rounding code, but did not change the FREQSEL bits. Correspondence with the OMAP hardware team indicates that Fint values not in the table should not be used. So, prevent them from being selected during DPLL rate rounding. This removes warnings and also can prevent the chip from locking up. The first pass through the rate rounding code will update the DPLL max and min dividers appropriately, so later rate rounding passes will run faster than the first. Peter de Schrijver <peter.de-schrijver@nokia.com> put up with several test cycles of this patch - thanks Peter. linux-omap source commit is f9c1b82f55b60fc39eaa6e7aa1fbe380c0ffe2e9. Signed-off-by: Paul Walmsley <paul@pwsan.com> Cc: Peter de Schrijver <peter.de-schrijver@nokia.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] OMAP3 clock: convert dpll_data.idlest_bit to idlest_maskPaul Walmsley
Convert struct dpll_data.idlest_bit field to idlest_mask. Needed since OMAP2 uses two bits for DPLL IDLEST rather than one. While here, add the missing idlest_* fields for DPLL3. linux-omap source commits are 25bab0f176b0a97be18a1b38153f266c3a155784 and b0f7fd17db2aaf8e6e9a2732ae3f4de0874db01c. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] OMAP3 clock: DPLL{1,2}_FCLK clksel can divide by 4Paul Walmsley
OMAP34xx ES2 TRM Delta G to H states that the divider for DPLL1_FCLK and DPLL2_FCLK can divide by 4 in addition to dividing by 1 and 2. Encode this into the OMAP3 clock framework. linux-omap source commit is 050684c18f2ea0b08fdd5233a0cd3c7f96e00a0e. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] OMAP3 PRCM: add DPLL1-5 powerdomains, clockdomains; mark clocksPaul Walmsley
Each DPLL exists in its own powerdomain (cf 34xx TRM figure 4-18) and clockdomain; so, create powerdomain and clockdomain structures for them. Mark each DPLL clock as belonging to their respective DPLL clockdomain. cf. 34xx TRM Table 4-27 (among other references). linux-omap source commits are acdb615850b9b4f7d1ab68133a16be8c8c0e7419 and a8798a48f33e9268dcc7f30a4b4a3ce4220fe0c9. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] OMAP3 clock: move sys_clkout2 clk to core_clkdmPaul Walmsley
sys_clkout2 belongs in the core_clkdm (3430 TRM section 4.7.2.2). It's not clear whether it actually is in the CORE clockdomain, or whether it is technically in a different clockdomain; but this is closer to reality than the present configuration. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] OMAP: Make dpll4_m4_ck programmable with clk_set_rate()Paul Walmsley
Filling the set_rate and round_rate fields of dpll4_m4_ck makes this clock programmable through clk_set_rate(). This is needed to give omapfb control over the dss1_alwon_fck rate. This patch includes a fix from Tomi Valkeinen <tomi.valkeinen@nokia.com>. linux-omap source commits are e42218d45afbc3e654e289e021e6b80c657b16c2 and 9d211b761b3cdf7736602ecf7e68f8a298c13278. Signed-off-by: Måns Rullgård <mans@mansr.com> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com> Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] OMAP: Add CSI2 clock struct for handling it with clock APISergio Aguirre
Add CSI2 clock struct for handling it with clock API when TI PM is disabled. linux-omap source commit is 8b20f4498928459276bd3366e3381ad595d23432. Signed-off-by: Sergio Aguirre <saaguirre@ti.com> Acked-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] OMAP2: Fix definition of SGX clock register bitsDaniel Stone
The GFX/SGX functional and interface clocks have different masks, for some unknown reason, so split EN_SGX_SHIFT into one each for fclk and iclk. Correct according to the TRM and the far more important 'does this actually work at all?' metric. linux-omap source commit is de1121fdb899f762b9e717f44eaf3fae7c00cd3e. Signed-off-by: Daniel Stone <daniel.stone@nokia.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] OMAP3 clock: fix 96MHz clocksPaul Walmsley
Fix some bugs in the OMAP3 clock tree pertaining to the 96MHz clocks. The 96MHz portion of the clock tree should now have reasonable fidelity to the 34xx TRM Rev I. One remaining question mark: it's not clear exactly which 96MHz source clock the USIM uses. This patch sticks with the previous setting, which seems reasonable. linux-omap source commit is 15c706e8179ce238c3ba70a25846a36b73bd2359. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] OMAP3: move USBHOST SAR handling from clock framework to powerdomain layerPaul Walmsley
Remove usbhost_sar_fclk from the OMAP3 clock framework. The bit that the clock was tweaking doesn't actually enable or disable a clock; it controls whether the hardware will save and restore USBHOST state when the powerdomain changes state. (That happens to coincidentally enable a clock for the duration of the operation, hence the earlier confusion.) In place of the clock, mark the USBHOST powerdomain as supporting hardware save-and-restore functionality. linux-omap source commit is f3ceac86a9d425d101d606d87a5af44afef27179. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] OMAP2/3: Add non-CORE DPLL rate set code and M, N programmingPaul Walmsley
Add non-CORE DPLL rate set code and M,N programming for OMAP3. Connect it to OMAP34xx DPLLs 1, 2, 4, 5 via the clock framework. You may see some warnings on rate sets from the freqsel code. The table that TI presented in the 3430 TRM Rev F does not cover Fint < 750000, which definitely occurs in practice. However, the lack of this freqsel case does not appear to impair the DPLL rate change. linux-omap source commit is 689fe67c6d1ad8f52f7f7b139a3274b79bf3e784. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] omap: convert OMAP3 to use clkdevRussell King
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] omap: move propagate_rate() calls into generic omap clock codeRussell King
propagate_rate() is recursive, so it makes sense to minimise the amount of stack which is used for each recursion. So, rather than recursing back into it from the ->recalc functions if RATE_PROPAGATES is set, do that test at the higher level. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] omap: don't use clkops_omap2_dflt_wait for non-ICLK/FCLK clocksRussell King
The original code in omap2_clk_wait_ready() used to check the low 8 bits to determine whether they were within the FCLKEN or ICLKEN registers. Specifically, the test is satisfied when these offsets are used: CM_FCLKEN, CM_FCLKEN1, CM_CLKEN, OMAP24XX_CM_FCLKEN2, CM_ICLKEN, CM_ICLKEN1, CM_ICLKEN2, CM_ICLKEN3, OMAP24XX_CM_ICLKEN4 OMAP3430_CM_CLKEN_PLL, OMAP3430ES2_CM_CLKEN2 If one of these offsets isn't used, omap2_clk_wait_ready() merely returns without doing anything. So we should use the non-wait clkops version instead and eliminate that conditional. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] omap: eliminate unnecessary conditionals in omap2_clk_wait_readyRussell King
Rather than employing run-time tests in omap2_clk_wait_ready() to decide whether we need to wait for the clock to become ready, we can set the .ops appropriately. This change deals with the OMAP24xx and OMAP34xx conditionals only. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] omap: add default .ops to all remaining OMAP2 clocksRussell King
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] omap: kill PARENT_CONTROLS_CLOCKRussell King
PARENT_CONTROLS_CLOCK just makes enable/disable no-op, and is functionally an alias for ALWAYS_ENABLED. This can be handled in the same way, using clkops_null. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-08[ARM] omap: provide a NULL clock operations structureRussell King
... and use it for clocks which are ALWAYS_ENABLED. These clocks use a non-NULL enable_reg pointer for other purposes (such as selecting clock rates.) Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2009-02-02[ARM] omap: introduce clock operations structureRussell King
Collect up all the common enable/disable clock operation functions into a separate operations structure. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-12-10omap mmc: Add better MMC low-level initTony Lindgren
This will simplify the MMC low-level init, and make it more flexible to add support for a newer MMC controller in the following patches. The patch rearranges platform data and gets rid of slot vs controller confusion in the old data structures. Also fix device id numbering in the clock code. Some code snippets are based on an earlier patch by Russell King <linux@arm.linux.org.uk>. Cc: Pierre Ossman <drzeus-mmc@drzeus.cx> Signed-off-by: Tony Lindgren <tony@atomide.com>
2008-12-10ARM: OMAP: Enable GPIO debounce clock only when debounce is enabled v3Jouni Hogander
This patch changes gpio "driver" to enable debounce clock for gpio-bank only when debounce is enabled for some gpio in that bank. Gpio functional clocks are also renamed in clock tree, gpioX_fck -> gpioX_dbck. This patch triggers problem with gpio wake-up and Omap3. Gpios in PER domain aren't capable to generate wake-up if PER domain is in sleep state. For this iopad wake-up should be used and needed pad configuration should be done. Enabling iopad wake-up for gpio pads is left for bootloader or omap mux configuration in kernel. Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com> Acked-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2008-08-19ARM: OMAP2: Clock: Combine 34xx l3_icks and l4_icksHögander Jouni
E.g dss_l3_ick and dss_l4_ick have same gating control. Having own clock for both of them causes race condition between enable / disable. This patch combines this kind of clocks and names new clock as <module>_ick. Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com> Acked-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2008-08-19ARM: OMAP2: Clockdomain: Integrate OMAP3 clocks with clockdomain codePaul Walmsley
This patch integrates the OMAP3 clock tree with the clockdomain code. This patch: - marks OMAP34xx clocks with their corresponding clockdomain. - adds code to convert the clockdomain name to a clockdomain pointer in the struct clk during clk_register(). - modifies OMAP2 clock usecounting to call into the clockdomain code when clocks are enabled or disabled. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2008-08-07[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/machRussell King
This just leaves include/asm-arm/plat-* to deal with. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-07-03ARM: OMAP2: Clock: New OMAP2/3 DPLL rate rounding algorithmPaul Walmsley
This patch adds a new rate rounding algorithm for DPLL clocks on the OMAP2/3 architecture. For a desired DPLL target rate, there may be several multiplier/divider (M, N) values which will generate a sufficiently close rate. Lower N values result in greater power economy. However, lower N values can cause the difference between the rounded rate and the target rate ("rate error") to be larger than it would be with a higher N. This can cause downstream devices to run more slowly than they otherwise would. This DPLL rate rounding algorithm: - attempts to find the lowest possible N (DPLL divider) to reach the target_rate (since, according to Richard Woodruff <r-woodruff@ti.com>, lower N values save more power than higher N values). - allows developers to set an upper bound on the error between the rounded rate and the desired target rate ("rate tolerance"), so an appropriate balance between rate fidelity and power savings can be set. This maximum rate error tolerance is set via omap2_set_dpll_rate_tolerance(). - never returns a rounded rate higher than the target rate. The rate rounding algorithm caches the last rounded M, N, and rate computation to avoid rounding the rate twice for each clk_set_rate() call. (This patch does not yet implement set_rate for DPLLs; that follows in a future patch.) The algorithm trades execution speed for rate accuracy. It will find the (M, N) set that results in the least rate error, within a specified rate tolerance. It does this by evaluating each divider setting - on OMAP3, this involves 128 steps. Another approach to DPLL rate rounding would be to bail out as soon as a valid rate is found within the rate tolerance, which would trade rate accuracy for execution speed. Alternate implementations welcome. This code is not yet used by the OMAP24XX DPLL clock, since it is currently defined as a composite clock, fusing the DPLL M,N and the M2 output divider. This patch also renames the existing OMAP24xx DPLL programming functions to highlight that they program both the DPLL and the DPLL's output multiplier. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2008-07-03ARM: OMAP2: Clock: Add OMAP3 DPLL autoidle functionsPaul Walmsley
This patch adds support for DPLL autoidle control to the OMAP3 clock framework. These functions will be used by the noncore DPLL enable and disable code - this is because, according to the CDP code, the DPLL autoidle status must be saved and restored across DPLL lock/bypass/off transitions. N.B.: the CORE DPLL (DPLL3) has three autoidle mode options, rather than just two. This code currently does not support the third option, low-power bypass autoidle. Signed-off-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Tony Lindgren <tony@atomide.com>