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* clocksource: sh_mtu2: Sort headers alphabeticallyLaurent Pinchart2014-04-161-9/+9
| | | | | | | This helps locating duplicates and inserting new headers. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Remove FSF mail address from GPL noticeLaurent Pinchart2014-04-161-4/+0
| | | | | | | | | | Do not include the paragraph about writing to the Free Software Foundation's mailing address from the sample GPL notice. The FSF has changed addresses in the past, and may do so again. Linux already includes a copy of the GPL. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Rename clock to "fck" in the non-legacy caseLaurent Pinchart2014-04-161-1/+1
| | | | | | | | | | | | | | | | | The sh_mtu2 driver gets the MTU2 functional clock using a connection ID of "mtu2_fck". While all SH SoCs create clock lookup entries with a NULL device ID and a "mtu2_fck" connection ID, the ARM SoCs use the device ID only with a NULL connection ID. This works on legacy platforms but will break on ARM with DT boot. Fix the situation by using a connection ID of "fck" in the non-legacy platform data case. Clock lookup entries will be renamed to use the device ID as well as the connection ID as platforms get moved to new platform data. The legacy code will eventually be dropped, leaving us with device ID based clock lookup, compatible with DT boot. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Add support for multiple channels per deviceLaurent Pinchart2014-04-161-54/+130
| | | | | | | | | | | | | | | | | MTU2 hardware devices can support multiple channels, with global registers and per-channel registers. The sh_mtu2 driver currently models the hardware with one Linux device per channel. This model makes it difficult to handle global registers in a clean way. Add support for a new model that uses one Linux device per timer with multiple channels per device. This requires changes to platform data, add new channel configuration fields. Support for the legacy model is kept and will be removed after all platforms switch to the new model. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Hardcode MTU2 clock event rating to 200Laurent Pinchart2014-04-161-6/+6
| | | | | | | | All boards use clock event ratings of 200 for the MTU2, hardcode it in the driver. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Set cpumask to cpu_possible_maskLaurent Pinchart2014-04-161-1/+1
| | | | | | | The MTU2 is not tied to CPU0, make it usable on any CPU. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Replace hardcoded register values with macrosLaurent Pinchart2014-04-161-6/+92
| | | | | | | Define symbolic macros for all used registers bits. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Allocate channels dynamicallyLaurent Pinchart2014-04-161-7/+20
| | | | | | | This prepares the driver for multi-channel support. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Replace kmalloc + memset with kzallocLaurent Pinchart2014-04-161-5/+1
| | | | | | | One kzalloc a day keeps the bugs away. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Add index to struct sh_mtu2_channelLaurent Pinchart2014-04-161-9/+13
| | | | | | | | Use the index as the timer start/stop bit and when printing messages to identify the channel. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Add memory base to sh_mtu2_channel structureLaurent Pinchart2014-04-161-14/+18
| | | | | | | | The channel memory base is channel-specific, add it to the channel structure in preparation for support of multiple channels per device. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Constify name argument to sh_mtu2_register()Laurent Pinchart2014-04-161-3/+3
| | | | | | | | The name argument is assigned to const structure fields only, constify it. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Split channel setup to separate functionLaurent Pinchart2014-04-161-10/+19
| | | | | | | | Move the channel setup code from sh_mtu2_setup to a new sh_mtu2_setup_channel function and call it from sh_mtu2_setup. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Rename struct sh_mtu2_priv to sh_mtu2_deviceLaurent Pinchart2014-04-161-32/+33
| | | | | | | | Channel data is private as well, rename priv to device to make the distrinction between the core device and the channels clearer. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Split channel fields from sh_mtu2_privLaurent Pinchart2014-04-161-56/+69
| | | | | | | | Create a new sh_mtu2_channel structure to hold the channel-specific fields in preparation for multiple channels per device support. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Turn sh_mtu2_priv fields into local variablesLaurent Pinchart2014-04-161-5/+5
| | | | | | | | The rate and periodic fields are used in a single function only, as local variables. Remove them from the structure. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_mtu2: Use request_irq() instead of setup_irq()Laurent Pinchart2014-04-161-14/+8
| | | | | | | | | | | | The driver claims it needs to register an interrupt handler too early for request_irq(). This might have been true in the past, but the only meaningful difference between request_irq() and setup_irq() today is an additional kzalloc() call in request_irq(). As the driver calls kmalloc() itself we know that the slab allocator is available, we can thus switch to request_irq(). Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Wolfram Sang <wsa@sang-engineering.com>
* clocksource: sh_tmu: Sort headers alphabeticallyLaurent Pinchart2014-04-161-10/+10
| | | | | | This helps locating duplicates and inserting new headers. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_tmu: Remove FSF mail address from GPL noticeLaurent Pinchart2014-04-161-4/+0
| | | | | | | | | Do not include the paragraph about writing to the Free Software Foundation's mailing address from the sample GPL notice. The FSF has changed addresses in the past, and may do so again. Linux already includes a copy of the GPL. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_tmu: Rename clock to "fck" in the non-legacy caseLaurent Pinchart2014-04-161-1/+2
| | | | | | | | | | | | | | | | The sh_tmu driver gets the TMU functional clock using a connection ID of "tmu_fck". While all SH SoCs create clock lookup entries with a NULL device ID and a "tmu_fck" connection ID, the ARM SoCs use the device ID only with a NULL connection ID. This works on legacy platforms but will break on ARM with DT boot. Fix the situation by using a connection ID of "fck" in the non-legacy platform data case. Clock lookup entries will be renamed to use the device ID as well as the connection ID as platforms get moved to new platform data. The legacy code will eventually be dropped, leaving us with device ID based clock lookup, compatible with DT boot. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_tmu: Add support for multiple channels per deviceLaurent Pinchart2014-04-161-61/+152
| | | | | | | | | | | | | | | | TMU hardware devices can support multiple channels, with global registers and per-channel registers. The sh_tmu driver currently models the hardware with one Linux device per channel. This model makes it difficult to handle global registers in a clean way. Add support for a new model that uses one Linux device per timer with multiple channels per device. This requires changes to platform data, add new channel configuration fields. Support for the legacy model is kept and will be removed after all platforms switch to the new model. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_tmu: Hardcode TMU clock event and source ratings to 200Laurent Pinchart2014-04-161-12/+11
| | | | | | | All boards use clock event and clock source ratings of 200 for the TMU, hardcode it in the driver. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_tmu: Replace hardcoded register values with macrosLaurent Pinchart2014-04-161-5/+14
| | | | | | Define symbolic macros for all used registers bits. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_tmu: Allocate channels dynamicallyLaurent Pinchart2014-04-161-7/+20
| | | | | | This prepares the driver for multi-channel support. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_tmu: Replace kmalloc + memset with kzallocLaurent Pinchart2014-04-161-5/+1
| | | | | | One kzalloc a day keeps the bugs away. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_tmu: Add index to struct sh_tmu_channelLaurent Pinchart2014-04-161-11/+24
| | | | | | | Use the index as the timer start/stop bit and when printing messages to identify the channel. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_tmu: Add memory base to sh_tmu_channel structureLaurent Pinchart2014-04-161-14/+16
| | | | | | | The channel memory base is channel-specific, add it to the channel structure in preparation for support of multiple channels per device. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_tmu: Constify name argument to sh_tmu_register()Laurent Pinchart2014-04-161-4/+4
| | | | | | | The name argument is assigned to const structure fields only, constify it. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_tmu: Split channel setup to separate functionLaurent Pinchart2014-04-161-13/+23
| | | | | | | Move the channel setup code from sh_tmu_setup to a new sh_tmu_setup_channel function and call it from sh_tmu_setup. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_tmu: Rename struct sh_tmu_priv to sh_tmu_deviceLaurent Pinchart2014-04-161-34/+34
| | | | | | | Channel data is private as well, rename priv to device to make the distrinction between the core device and the channels clearer. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_tmu: Split channel fields from sh_tmu_privLaurent Pinchart2014-04-161-110/+125
| | | | | | | Create a new sh_tmu_channel structure to hold the channel-specific field in preparation for multiple channels per device support. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_tmu: Use request_irq() instead of setup_irq()Laurent Pinchart2014-04-161-14/+8
| | | | | | | | | | | The driver claims it needs to register an interrupt handler too early for request_irq(). This might have been true in the past, but the only meaningful difference between request_irq() and setup_irq() today is an additional kzalloc() call in request_irq(). As the driver calls kmalloc() itself we know that the slab allocator is available, we can thus switch to request_irq(). Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Request IRQ for clock event device onlyLaurent Pinchart2014-04-161-24/+27
| | | | | | | Clock sources don't need an IRQ, request the IRQ only for channels used as clock event devices. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Sort headers alphabeticallyLaurent Pinchart2014-04-161-10/+10
| | | | | | This helps locating duplicates and inserting new headers. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Remove FSF mail address from GPL noticeLaurent Pinchart2014-04-161-4/+0
| | | | | | | | | Do not include the paragraph about writing to the Free Software Foundation's mailing address from the sample GPL notice. The FSF has changed addresses in the past, and may do so again. Linux already includes a copy of the GPL. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Rename clock to "fck" in the non-legacy caseLaurent Pinchart2014-04-161-1/+1
| | | | | | | | | | | | | | | | The sh_cmt driver gets the CMT functional clock using a connection ID of "cmt_fck". While all SH SoCs create clock lookup entries with a NULL device ID and a "cmt_fck" connection ID, the ARM SoCs use the device ID only with a NULL connection ID. This works on legacy platforms but will break on ARM with DT boot. Fix the situation by using a connection ID of "fck" in the non-legacy platform data case. Clock lookup entries will be renamed to use the device ID as well as the connection ID as platforms get moved to new platform data. The legacy code will eventually be dropped, leaving us with device ID based clock lookup, compatible with DT boot. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Add support for multiple channels per deviceLaurent Pinchart2014-04-162-68/+237
| | | | | | | | | | | | | | | | CMT hardware devices can support multiple channels, with global registers and per-channel registers. The sh_cmt driver currently models the hardware with one Linux device per channel. This model makes it difficult to handle global registers in a clean way. Add support for a new model that uses one Linux device per timer with multiple channels per device. This requires changes to platform data, add new channel configuration fields. Support for the legacy model is kept and will be removed after all platforms switch to the new model. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Hardcode CMT clock source rating to 125Laurent Pinchart2014-04-161-6/+6
| | | | | | | All boards use or should use a clock source rating of 125 for the CMT, hardcode it in the driver. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Hardcode CMT clock event rating to 125Laurent Pinchart2014-04-161-7/+6
| | | | | | | All boards use or should use a clock event rating of 125 for the CMT, hardcode it in the driver. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Set cpumask to cpu_possible_maskLaurent Pinchart2014-04-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The CMT is a global timer not restricted to a single CPU. It has a lower rating than the TMU or ARM architected timer, but is still useful on systems where the other timers are stopped during CPU sleep. When multiple timers are available the timers core selects which timer to use based on timer ratings. On SMP systems where timer broadcasting is required, one dummy timer is instantiated per CPU with a rating of 100. On those systems the CMT timer has a rating of 80, which makes the dummy timer selected by default on all CPUs. The CMT is then available, and will be used as a broadcast timer. On UP systems no dummy timer is instantiated. The CMT timer has a rating of 125 on those systems and is used directly as a clock event device for CPU0 without broadcasting. The CMT rating shouldn't depend on whether we boot a UP or SMP system. We can't raise the CMT rating to 125 on SMP systems. This would select CMT as the clock event device for CPU0 as its rating is higher than the dummy timer rating, and would leave the system without a broadcast timer. We could instead lower the rating to 80 on all systems, but that wouldn't reflect reality as ratings between 1 and 99 are documented as "unfit for real use". We should raise the rating above 99 and still have the CMT selected as a broadcast timer. This can be done by changing the cpumask from cpumask_of(0) to cpu_possible_mask. In that case the timer selection logic will prefer the previously probed and already selected dummy timer for all CPUs based on the fact that already selected per-cpu timers are preferred over new global timers, regardless of their respective ratings. This also better reflects reality, as the CMT is not tied to the boot CPU. Ideally the timer selection logic should realize that the CMT needs to be used as a broadcast timer on SMP systems as no other broadcast timer is available, regardless of the cpumask and rating. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Replace hardcoded register values with macrosLaurent Pinchart2014-04-161-12/+44
| | | | | | Define symbolic macros for all used registers bits. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Split static information from sh_cmt_deviceLaurent Pinchart2014-04-161-70/+122
| | | | | | | | Create a new sh_cmt_info structure to hold static information about the device model and reference that structure from the sh_cmt_device structure. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Allocate channels dynamicallyLaurent Pinchart2014-04-161-2/+12
| | | | | | This prepares the driver for multi-channel support. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Replace kmalloc + memset with kzallocLaurent Pinchart2014-04-161-5/+1
| | | | | | One kzalloc a day keeps the bugs away. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Add index to struct sh_cmt_channelLaurent Pinchart2014-04-161-13/+24
| | | | | | Use the index when printing messages to identify the channel. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Add memory base to sh_cmt_channel structureLaurent Pinchart2014-04-161-5/+8
| | | | | | | The channel memory base is channel-specific, add it to the channel structure in preparation for support of multiple channels per device. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Rename mapbase/mapbase_str to mapbase_ch/mapbaseLaurent Pinchart2014-04-161-17/+17
| | | | | | | | The mapbase variable points to the mapped base address of the channel, rename it to mapbase_sh. mapbase_str points to the mapped base address of the CMT device, rename it to mapbase. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Constify name argument to sh_cmt_register()Laurent Pinchart2014-04-161-4/+4
| | | | | | | The name argument is assigned to const structure fields only, constify it. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Split channel setup to separate functionLaurent Pinchart2014-04-161-32/+47
| | | | | | | Move the channel setup code from sh_cmt_setup to a new sh_cmt_setup_channel function and call it from sh_cmt_setup. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
* clocksource: sh_cmt: Rename struct sh_cmt_priv to sh_cmt_deviceLaurent Pinchart2014-04-161-58/+58
| | | | | | | Channel data is private as well, rename priv to device to make the distrinction between the core device and the channels clearer. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
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