> -----Original Message-----
> From: DebBarma, Tarun Kanti
> Sent: Wednesday, December 15, 2010 9:35 AM
> To: linux-omap@xxxxxxxxxxxxxxx
> Cc: DebBarma, Tarun Kanti
> Subject: [PATCH v6 0/12] dmtimer adaptation to platform_driver
>
> dmtimer adaptation to platform_driver.
>
> This patch series is adaptation of dmtimer code to platform driver
> using omap_device and omap_hwmod abstraction.
>
> Tested on following platforms:
> OMAP4430, OMAP3430, OMAP3630, OMAP2430
> OMAP2420, OMAP1710(in-progress)
While validating on OMAP1710 I discovered that probe() is not triggered.
I will fix this problem in the next series.
--
Tarun
>
> Baseline:
> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
>
> v6:
> (1) Removed reset functions to mach-omap1/dmtimer.c.
> Access to reset function from plat-omap/dmtimer.c is provided by means
> of function pointer.
>
> (2) Remove multiple calls to omap_device_build() for registering timer
> devices
> during early and regular initialization. Regular device registration is
> now done
> by reading data from temporary list. This list is populated during early
> init
> where timer data is read from hwmod database and corresponding memory
> allocated.
>
> (3) kfree(pdata) under error condition since platform_device_unregister
> does
> not free its pdata.
>
> (4) Removed extra header inclusion in mach-omap2 and plat-omap
>
> NOTE: omap_dm_timer.<id> field could not be removed because during regular
> boot
> there is no mechanism to match the current pdev with corresponding entry
> in the
> timer list which was partially initialized during early boot.
>
>
> TODO:
> (1) OFF Mode support
>
> (2) Upgrade timeout implementation in low-level read/write access to
> return
> error condition to EXPORT APIs. This is re-frained in the present
> implementation
> because that would involve change to EXPORTED APIs. Besides, there is no
> clear
> design as yet which is agreed upon by the community.
>
>
> v4:
> (1) clock aliases are renamed as "32k_ck", "sys_ck" and "alt_ck"
> (2) incorporate missing clk_put() for corresponding clk_get()
> (3) modified clk_get()/clk_put() to be called once once in platform
> driver.
> (4) consistent header for new files
> (5) check return value of omap_hwmod_for_each_by_class() in device init
> routines.
> (6) remove is_abe_timer field in dmtimer_platform_data structure. this is
> no longer needed with new input clock source aliasing.
> (7) proper splitting of patch series
> (8) remove register map from hwmod database.
> (9) remove clock source strings array from hwmod database and associated
> structure declaration from plat/dmtimer.h. this is no longer needed.
> (10) remove dev_attr from hwmod database. this is no longer needed.
> (11) use register offsets to identify OMAP 4 registers instead of register
> map.
> (12) remove clock source name strings from hwmod database.
> (13) introduce new mechanism for getting struct clk associated with clock
> source
> names. this is achieved by adding clock alisases for all supported clock
> sources.
> (14) remove clock setup functions in mach-omap2 for populating struct clk
> associated with all input clock sources because this is no longer needed
> with
> above implementation.
> (15) device names changed from dmtimer to omap-timer
> (16) device index starts from 1 instead of 0
> (17) remove .init_name from hwmod database. this is not needed.
> (18) introduce separate functions for reading/writing interrupt registers
> instead of
> doing all operations within a single function.
>
> v3:
> (1) multi-line comment error correction
> (2) provision to allow any of the available dmtimers as early timers
> instead of restricting them to millisecond timers only.
> (3) in 'struct omap_dmtimer{}' is_initialized flag is redundant and
> so must be removed. if the element is found in the list it is already
> initialized.
> (4) remove 'found' flag in omap_dm_timer_request() and
> omap_dm_timer_request_specific() functions.
> this is not needed with alternate implementation.
> (5) use .init_name to initialize device names so that it can be identified
> during early boot as well. This is to avoid duplicate functions for clock
> manipulations during early boot and later.
> (6) remove redundant functions from mach-omap2 which are created just to
> call pm functions like: pm_runtime_get_sync(),pm_runtime_put_sync(),..
> and instead call them directly from plat-omap function api's.
> (7) timer clock source names made part of hwmod database. source_clock[]
> of type 'struct clk' is made part of platform data.
> (8) clockactivity field initialized in hwmod database to preserve fclk
> during idle. code which manipulate OCP config removed since they are
> already taken care by hwmod framework.
> (9) omap2_dm_timer_set_src() is optimized. Clock enable/disbale routines
> moved to plat-omap layer and simplfied to the level so as not to sacrifice
> intended functionality.
> NOTE: During early boot clock management was requested to be placed upon
> client drivers responsibility. this has not been done keeping in mind
> that it would entail (i) multiple modifications of client drivers (ii) it
> would violate the purpose of having a framework (open to debate).
> (10) dmtimer register maps moved to hwmod database
>
> v2:
> (1) removed dedicated functions for early timer clock access.
> instead, now we have common functions for early and normal timers.
> (2) removed usage of clock source strings for reading corresponding
> struct clks. this is now achieved through clock aliases introduced
> for each input clock sources.
> (3) IP revision to distinguish new IP standard and the rest and then
> initialize dmtimer interrupt and functional offsets.
> (4) provision to initialize all dmtimers as early timers.
> (5) remove dm_timer_setup() function because this is no longer needed.
> (6) modify the device index to start from 1 instead of 0.
> (7) device name changed from dmtimer to omap-timer
> (8) extract device ids' from hwmod name and same used for device build.
> (9) additional resource allocation checks and free
> (10) early timer variable initialization
> (11) initialize timer_ip_type and register offsets in platform data
> structure.
> (12) some more comments/logs
>
>
> Cousson, Benoit (1):
> OMAP4: hwmod data: add dmtimer
>
> Tarun Kanti DebBarma (4):
> OMAP2+: dmtimer: convert to platform devices
> OMAP: dmtimer: switch-over to platform device driver
> OMAP: dmtimer: pm_runtime support
> OMAP: dmtimer: add timeout to low-level routines
>
> Thara Gopinath (6):
> OMAP2+: dmtimer: add device names to flck nodes
> OMAP2420: hwmod data: add dmtimer
> OMAP2430: hwmod data: add dmtimer
> OMAP3: hwmod data: add dmtimer
> OMAP1: dmtimer: conversion to platform devices
> OMAP: dmtimer: platform driver
>
> arch/arm/mach-omap1/Makefile | 2 +-
> arch/arm/mach-omap1/dmtimer.c | 209 +++++++++
> arch/arm/mach-omap2/Makefile | 2 +-
> arch/arm/mach-omap2/clock2420_data.c | 60 ++-
> arch/arm/mach-omap2/clock2430_data.c | 60 ++-
> arch/arm/mach-omap2/clock3xxx_data.c | 48 ++-
> arch/arm/mach-omap2/clock44xx_data.c | 44 ++-
> arch/arm/mach-omap2/dmtimer.c | 240 ++++++++++
> arch/arm/mach-omap2/dmtimer.h | 30 ++
> arch/arm/mach-omap2/io.c | 2 +
> arch/arm/mach-omap2/omap_hwmod_2420_data.c | 634
> ++++++++++++++++++++++++++
> arch/arm/mach-omap2/omap_hwmod_2430_data.c | 633
> ++++++++++++++++++++++++++
> arch/arm/mach-omap2/omap_hwmod_3xxx_data.c | 675
> ++++++++++++++++++++++++++++
> arch/arm/mach-omap2/omap_hwmod_44xx_data.c | 623
> +++++++++++++++++++++++++
> arch/arm/mach-omap2/timer-gp.c | 1 -
> arch/arm/plat-omap/dmtimer.c | 577 ++++++++++++-----------
> -
> arch/arm/plat-omap/include/plat/dmtimer.h | 40 ++-
> 17 files changed, 3544 insertions(+), 336 deletions(-)
> create mode 100644 arch/arm/mach-omap1/dmtimer.c
> create mode 100644 arch/arm/mach-omap2/dmtimer.c
> create mode 100644 arch/arm/mach-omap2/dmtimer.h
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