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path: root/drivers/clk/renesas/clk-mstp.c
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2018-10-18Merge branches 'clk-dt-name', 'clk-ti-of-node' and 'clk-sa' into clk-nextStephen Boyd1-4/+4
- Use updated printk format for OF node names - Fix TI code to only search DT subnodes - Various static analysis finds * clk-dt-name: clk: Convert to using %pOFn instead of device_node.name * clk-ti-of-node: clk: ti: fix OF child-node lookup * clk-sa: clk: mvebu: armada-37xx-tbg: Switch to clk_get and balance it in probe reset: hisilicon: fix potential NULL pointer dereference clk: cdce925: release child device nodes clk: qcom: clk-branch: Use true and false for boolean values
2018-09-28clk: renesas: Convert to SPDX identifiersKuninori Morimoto1-4/+1
This patch updates license to use SPDX-License-Identifier instead of verbose license text. Signed-off-by: Kuninori Morimoto <[email protected]> [rebased against clk-spdx] Signed-off-by: Geert Uytterhoeven <[email protected]> Reviewed-by: Simon Horman <[email protected]> Signed-off-by: Stephen Boyd <[email protected]>
2018-08-30clk: Convert to using %pOFn instead of device_node.nameRob Herring1-4/+4
In preparation to remove the node name pointer from struct device_node, convert printf users to use the %pOFn format specifier. Cc: Eugeniy Paltsev <[email protected]> Cc: Michael Turquette <[email protected]> Cc: Stephen Boyd <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Signed-off-by: Rob Herring <[email protected]> Signed-off-by: Stephen Boyd <[email protected]>
2018-03-21clk: renesas: mstp: Always use readl()/writel()Geert Uytterhoeven1-2/+2
On arm32, there is no reason to use the (soon deprecated) clk_readl()/clk_writel(). Hence use the generic readl()/writel() instead. Signed-off-by: Geert Uytterhoeven <[email protected]> Reviewed-by: Simon Horman <[email protected]>
2017-12-14clk: renesas: mstp: Keep wakeup sources active during system suspendGeert Uytterhoeven1-1/+1
If a device is part of the CPG/MSTP Clock Domain and to be used as a wakeup source, it must be kept active during system suspend. Currently this is handled in device-specific drivers by explicitly increasing the use count of the module clock when the device is configured as a wakeup source. However, the proper way to prevent the device from being stopped is to inform this requirement to the genpd core, by setting the GENPD_FLAG_ACTIVE_WAKEUP flag. Note that this will only affect devices configured as wakeup sources. Signed-off-by: Geert Uytterhoeven <[email protected]> Reviewed-by: Ulf Hansson <[email protected]>
2017-09-28clk: renesas: mstp: Delete error messages for failed memory allocationsMarkus Elfring1-4/+1
The script "checkpatch.pl" pointed information out like the following. WARNING: Possible unnecessary 'out of memory' message Thus fix affected source code places. Signed-off-by: Markus Elfring <[email protected]> Signed-off-by: Geert Uytterhoeven <[email protected]>
2017-07-21clk: Convert to using %pOF instead of full_nameRob Herring1-1/+1
Now that we have a custom printf format specifier, convert users of full_name to use %pOF instead. This is preparation to remove storing of the full path string for each node. Signed-off-by: Rob Herring <[email protected]> Cc: Michael Turquette <[email protected]> Cc: Stephen Boyd <[email protected]> Cc: Maxime Coquelin <[email protected]> Cc: Alexandre Torgue <[email protected]> Cc: Russell King <[email protected]> Cc: Matthias Brugger <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Cc: Maxime Ripard <[email protected]> Cc: Chen-Yu Tsai <[email protected]> Cc: "Emilio López" <[email protected]> Cc: Peter De Schrijver <[email protected]> Cc: Prashant Gaikwad <[email protected]> Cc: Thierry Reding <[email protected]> Cc: Jonathan Hunter <[email protected]> Cc: Tero Kristo <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Acked-by: Maxime Ripard <[email protected]> Reviewed-by: Geert Uytterhoeven <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Acked-by: James Liao <[email protected]> Acked-by: Alexandre TORGUE <[email protected]> Reviewed-by: Matthias Brugger <[email protected]> Signed-off-by: Stephen Boyd <[email protected]>
2017-05-15clk: renesas: Use pm_clk_no_clocks() helper i.s.o. direct accessGeert Uytterhoeven1-1/+1
The pm_subsys_data.clock_list member exists only if CONFIG_PM_CLK=y. Hence direct accesses to this field break compile-testing on platforms where CONFIG_PM_CLK=n. To fix this, use the pm_clk_no_clocks() helper instead, for which a dummy version is provided if CONFIG_PM_CLK=n. Signed-off-by: Geert Uytterhoeven <[email protected]> Reviewed-by: Simon Horman <[email protected]>
2017-02-16clk: renesas: mstp: ensure register writes completeChris Brandt1-0/+6
When there is no status bit, it is possible for the clock enable/disable operation to have not completed by the time the driver code resumes execution. This is due to the fact that write operations are sometimes queued and delayed internally. Doing a read ensures the write operations has completed. Fixes: b6face404f38 ("ARM: shmobile: r7s72100: add essential clock nodes to dtsi") Signed-off-by: Chris Brandt <[email protected]> Reviewed-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Stephen Boyd <[email protected]>
2017-01-27Merge tag 'clk-renesas-for-v4.11-tag2' of ↵Stephen Boyd1-3/+8
git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers into clk-next Pull Renesas clk driver updates from Geert Uytterhoeven: - Use CLK_IS_CRITICAL to handle critical clocks, - Add Reset Control Support for R-Car Gen2 and Gen3, and RZ/G1, - Add IIC-DVFS clocks for R-Car H3 and M3-W, - Minor cleanups. * tag 'clk-renesas-for-v4.11-tag2' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers: clk: renesas: r8a7796: Add IIC-DVFS clock clk: renesas: r8a7795: Add IIC-DVFS clock clk: renesas: cpg-mssr: Add support for reset control clk: renesas: cpg-mssr: Rename cpg_mssr_priv.mstp_lock clk: renesas: cpg-mssr: Document suitability for RZ/G1 dt-bindings: clock: renesas: cpg-mssr: Document reset control support clk: renesas: mstp: Reformat cpg_mstp_clock_register() for git diff clk: renesas: mstp: Make INTC-SYS a critical clock clk: renesas: cpg-mssr: Migrate to CLK_IS_CRITICAL
2017-01-27clk: renesas: mstp: Reformat cpg_mstp_clock_register() for git diffGeert Uytterhoeven1-3/+3
As the function header of cpg_mstp_clock_register() is split in an unusual way, "git diff" gets confused when changes to the body of the function are made, and attributes them to the wrong function. Reformat the function header to fix this. Signed-off-by: Geert Uytterhoeven <[email protected]> Acked-by: Stephen Boyd <[email protected]>
2017-01-23clk: renesas: mstp: Make INTC-SYS a critical clockGeert Uytterhoeven1-0/+5
INTC-SYS is the module clock for the GIC. Accessing the GIC while it is disabled causes: Unhandled fault: asynchronous external abort (0x1211) at 0x00000000 Currently, the GIC-400 driver cannot enable its module clock for several reasons: - It does not use a platform device, so Runtime PM is not an option, - gic_of_init() runs before any clocks are registered, so it cannot enable the clock explicitly, - gic_of_init() cannot return -EPROBE_DEFER, as IRQCHIP_DECLARE() doesn't support deferred probing. Hence we have to keep on relying on the boot loader for enabling the module clock. To prevent the module clock from being disabled when the CCF core thinks it is unused, and thus causing a system lock-up, add a check to the MSTP clock driver and enable CLK_IS_CRITICAL. This will make sure the module clock is never disabled. This is a hard dependency for describing the INTC-SYS clock in DT on R-Mobile APE6 and R-Car Gen2. Signed-off-by: Geert Uytterhoeven <[email protected]> Acked-by: Stephen Boyd <[email protected]>
2016-12-21clk: renesas: mstp: Support 8-bit registers for r7s72100Chris Brandt1-5/+22
The RZ/A1 is different than the other Renesas SOCs because the MSTP registers are 8-bit instead of 32-bit and if you try writing values as 32-bit nothing happens...meaning this driver never worked for r7s72100. Fixes: b6face404f38 ("ARM: shmobile: r7s72100: add essential clock nodes to dtsi") Signed-off-by: Chris Brandt <[email protected]> Reviewed-by: Geert Uytterhoeven <[email protected]> Tested-by: Geert Uytterhoeven <[email protected]> Acked-by: Kuninori Morimoto <[email protected]> Signed-off-by: Stephen Boyd <[email protected]>
2016-09-16clk/Renesas-MSTP: Use kmalloc_array() in cpg_mstp_clocks_init()Markus Elfring1-1/+1
A multiplication for the size determination of a memory allocation indicated that an array data structure should be processed. Thus use the corresponding function "kmalloc_array". This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <[email protected]> Reviewed-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Stephen Boyd <[email protected]>
2016-04-28clk: renesas: mstp: Use always-on governor for Clock DomainGeert Uytterhoeven1-1/+1
As a pure Clock Domain does not have the concept of powering the domain itself, the CPG/MSTP driver does not provide power_off() and power_on() callbacks. However, the genpd core may still perform a dummy power down, causing /sys/kernel/debug/pm_genpd/pm_genpd_summary to report the domain's status being "off-0". Use the always-on governor to make sure the domain is never powered down, and always shows up as "on" in pm_genpd_summary. Signed-off-by: Geert Uytterhoeven <[email protected]> Reviewed-by: Laurent Pinchart <[email protected]> Reviewed-by: Ulf Hansson <[email protected]>
2016-04-28clk: renesas: mstp: Postpone call to pm_genpd_init()Geert Uytterhoeven1-2/+1
All local setup of the generic_pm_domain structure should have been completed before calling pm_genpd_init(). Signed-off-by: Geert Uytterhoeven <[email protected]> Reviewed-by: Laurent Pinchart <[email protected]> Reviewed-by: Ulf Hansson <[email protected]>
2016-04-07clk: renesas: mstp: Clarify cpg_mstp_{at,de}tach_dev() domain parameterGeert Uytterhoeven1-2/+2
Make it clear that the "domain" parameter of the cpg_mstp_attach_dev() and cpg_mstp_detach_dev() functions is not used. The cpg_mstp_attach_dev() and cpg_mstp_detach_dev() callbacks are not only used by the CPG/MSTP Clock Domain driver, but also by the R-Mobile SYSC PM Domain driver. Signed-off-by: Geert Uytterhoeven <[email protected]>
2016-04-07clk: renesas: mstp: Drop check for CONFIG_PM_GENERIC_DOMAINS_OFGeert Uytterhoeven1-3/+0
As of commit 71d076ceb245f0d9 ("ARM: shmobile: Enable PM and PM_GENERIC_DOMAINS for SoCs with PM Domains"), CONFIG_PM_GENERIC_DOMAINS_OF is always enabled for SoCs with MSTP clocks. Signed-off-by: Geert Uytterhoeven <[email protected]> Acked-by: Laurent Pinchart <[email protected]>
2016-03-15clk: renesas: Rename header file renesas.hSimon Horman1-1/+1
This is part of an ongoing process to migrate from ARCH_SHMOBILE to ARCH_RENESAS the motivation for which being that RENESAS seems to be a more appropriate name than SHMOBILE for the majority of Renesas ARM based SoCs. Along with the above mentioned Kconfig changes it seems appropriate to also rename files. Signed-off-by: Simon Horman <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Stephen Boyd <[email protected]>
2016-03-03clk: renesas: move drivers to renesas directorySimon Horman1-0/+329
This is part of an ongoing process to migrate from ARCH_SHMOBILE to ARCH_RENESAS the motivation for which being that RENESAS seems to be a more appropriate name than SHMOBILE for the majority of Renesas ARM based SoCs. Along with the above mentioned Kconfig changes it seems appropriate to also rename directories that only hold drivers for such SoCs. Signed-off-by: Simon Horman <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Stephen Boyd <[email protected]>
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