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path: root/drivers/clk/keystone
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2018-10-19Merge branch 'clk-k3-tisci' into clk-nextStephen Boyd3-1/+11
- TI SCI clks on K3 SoCs * clk-k3-tisci: clk: keystone: add missing MODULE_LICENSE clk: keystone: Enable TISCI clocks if K3_ARCH
2018-10-08clk: keystone: add missing MODULE_LICENSEArnd Bergmann2-0/+10
A randconfig build showed that two clk modules have no license tag: WARNING: modpost: missing MODULE_LICENSE() in drivers/clk/keystone/gate.o see include/linux/module.h for more information WARNING: modpost: missing MODULE_LICENSE() in drivers/clk/keystone/pll.o see include/linux/module.h for more information Add the appropriate information from the comment at the start of the two files. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Santosh Shilimkar <ssantosh@krenel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2018-10-02clk: keystone: Enable TISCI clocks if K3_ARCHNishanth Menon1-1/+1
K3_ARCH uses TISCI for clocks as well. Enable the same for the driver support. Signed-off-by: Nishanth Menon <nm@ti.com> Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2018-08-30clk: Convert to using %pOFn instead of device_node.nameRob Herring2-2/+2
In preparation to remove the node name pointer from struct device_node, convert printf users to use the %pOFn format specifier. Cc: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@kernel.org> Cc: linux-clk@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-renesas-soc@vger.kernel.org Cc: linux-omap@vger.kernel.org Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2018-03-08clk: keystone: sci-clk: add support for dynamically probing clocksTero Kristo1-290/+90
Currently, the driver contains a large hints table for clocks that exist on a device, however, it is possible to probe the clocks from the firmware also. Add support for this, and drop the clock hints table support from the driver completely. This causes the driver to send a few extra sci-clk messages during boot, basically one extra for each device that exists on the SoC; on K2G this is approx 80. Signed-off-by: Tero Kristo <t-kristo@ti.com> Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
2017-08-03clk: keystone: sci-clk: Fix sci_clk_getTero Kristo1-24/+42
Currently a bug in the sci_clk_get implementation causes it to always return a clock belonging to the last device in the static list of clock data. This is due to a bug in the init code that causes the array used by sci_clk_get to only be populated with the clocks for the last device, as each device overwrites the entire array with its own clocks. Fix this by calculating the actual number of clocks for the SoC, and allocating the whole array in one go. Also, we don't need the handle to the init data array anymore after doing this, instead we can just compare the dev_id / clk_id against the registered clocks and use binary search for speed. Signed-off-by: Tero Kristo <t-kristo@ti.com> Reported-by: Dave Gerlach <d-gerlach@ti.com> Fixes: b745c0794e2f ("clk: keystone: Add sci-clk driver support") Cc: Nishanth Menon <nm@ti.com> Tested-by: Franklin Cooper <fcooper@ti.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2017-06-23clk: keystone: TI_SCI_PROTOCOL is needed for clk driverArnd Bergmann1-1/+2
CONFIG_COMPILE_TEST allows building a configuration without TI_SCI_PROTOCOL, which then fails to link: drivers/clk/keystone/sci-clk.o: In function `ti_sci_clk_probe': sci-clk.c:(.text.ti_sci_clk_probe+0x4c): undefined reference to `devm_ti_sci_get_handle' This makes it a hard dependency. Right now, that means we can't actually compile-test the driver unless ARCH_KEYSTONE is set as well, but we can fix that by allowing TI_MESSAGE_MANAGER to be selected for COMPILE_TEST as well. Fixes: b745c0794e2f ("clk: keystone: Add sci-clk driver support") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2017-06-14clk: keystone: Add sci-clk driver supportTero Kristo3-1/+741
In K2G, the clock handling is done through firmware executing on a separate core. Linux kernel needs to communicate to the firmware through TI system control interface to access any power management related resources, including clocks. The keystone sci-clk driver does this, by communicating to the firmware through the TI SCI driver. The driver adds support for registering clocks through DT, and basic required clock operations like prepare/get_rate, etc. Signed-off-by: Tero Kristo <t-kristo@ti.com> [sboyd@codeaurora.org: Make ti_sci_init_clocks() static] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-12-09clk: keystone: pll: Unmap region obtained by of_iomapArvind Yadav1-2/+7
Free memory mapping, if of_pll_div_clk_init is not successful. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-11-02clk: keystone: improve function-level documentationJulia Lawall1-2/+2
Adjust the documentation to use the actual function names. Issue detected using Coccinelle (http://coccinelle.lip6.fr/) Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-10-20clk: keystone: fix a trivial typoGeliang Tang1-1/+1
s/regsiter/register/ Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-07-28Merge branch 'cleanup-clk-h-includes' into clk-nextStephen Boyd2-2/+0
* cleanup-clk-h-includes: (62 commits) clk: Remove clk.h from clk-provider.h clk: h8300: Remove clk.h and clkdev.h includes clk: at91: Include clk.h and slab.h clk: ti: Switch clk-provider.h include to clk.h clk: pistachio: Include clk.h clk: ingenic: Include clk.h clk: si570: Include clk.h clk: moxart: Include clk.h clk: cdce925: Include clk.h clk: Include clk.h in clk.c clk: zynq: Include clk.h clk: ti: Include clk.h clk: sunxi: Include clk.h and remove unused clkdev.h includes clk: st: Include clk.h clk: qcom: Include clk.h clk: highbank: Include clk.h clk: bcm: Include clk.h clk: versatile: Remove clk.h and clkdev.h includes clk: ux500: Remove clk.h and clkdev.h includes clk: tegra: Properly include clk.h ...
2015-07-28clk: keystone: make use of of_clk_parent_fill helper functionDinh Nguyen1-2/+1
Use of_clk_parent_fill to fill in the parent clock names' array. Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com> Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-07-20clk: keystone: Remove clk.h includeStephen Boyd2-2/+0
Clock provider drivers generally shouldn't include clk.h because it's the consumer API. Remove the include here because this is a provider driver. Cc: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com> Cc: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-06-19clk: keystone: add support for post divider register for main pllMurali Karicheri1-2/+18
Main PLL controller has post divider bits in a separate register in pll controller. Use the value from this register instead of fixed divider when available. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com>
2014-02-11clk: keystone: gate: fix clk_init_data initializationIvan Khoronzhuk1-0/+1
The clk_init_data struct is allocated in the stack. All members of this struct should be initialized before using otherwise it will lead to unpredictable situation as it can contain garbage. Ultimately the clk->flag field contains garbage. In my case it leads that flag CLK_IGNORE_UNUSED is set for most of clocks. As result a bunch of unused clocks cannot be disabled. So initialize flags in this structure too. Cc: Mike Turquette <mturquette@linaro.org> Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2013-12-10clk: keystone: gate: fix error handling on initGrygorii Strashko1-4/+8
This patch fixes Keystone gate control clock driver initialization path: 1) clk_register_psc() returns error code and not a pure pointer, hence its return value need to be checked using IS_ERR(clk) macro. 2) Mapped IO memory isn't unmapped in case of errors, hence fix it. Cc: Mike Turquette <mturquette@linaro.org Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2013-12-10clk: keystone: use clkod register bits for postdivMurali Karicheri1-4/+20
DDR3A/B, ARM and PA PLL controllers have clkod register bits for configuring postdiv values. So use it instead of using fixed post dividers for these pll controllers. Assume that if fixed-postdiv attribute is not present, use clkod register value for pistdiv. Also update the Documentation of bindings to reflect the same. Cc: Mike Turquette <mturquette@linaro.org Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2013-10-08clk: keystone: Build Keystone clock driversSantosh Shilimkar1-0/+1
Now build the keystone common clock drivers. The build is made conditional based on COMMON_CLK_KEYSTONE Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-10-08clk: keystone: Add gate control clock driverSantosh Shilimkar1-0/+264
Add the driver for the clock gate control which uses PSC (Power Sleep Controller) IP on Keystone 2 based SOCs. It is responsible for enabling and disabling of the clocks for different IPs present in the SoC. Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-10-08clk: keystone: add Keystone PLL clock driverSantosh Shilimkar1-0/+305
Add the driver for the PLL IPs found on Keystone 2 devices. The PLL IP typically has a multiplier, a divider and a post-divider. The PLL IPs like ARMPLL, DDRPLL and PAPLL are controlled by the memory mapped register where as the Main PLL is controlled by a PLL controller and memory map registers. Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>