- 08 May, 2012 18 commits
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Andrew Lunn authored
Add a varient of the basic clk-gate code. This variant calls a function before gating the clock off. This function is used to disable the SATA or PCIe PHY. Now that all the drivers prepare and enable there clk as needed, there is no need for the common code to keep track of which clocks need gating on. Let the common clock framework turn off clocks which are not used. Buy using the added clk varient, when the clk framework turns off SATA or PCIe clocks, we also disabled SATA and PCIe PHYs which were not needed. The function kirkwood_pcie_id() can now be called outside of __init code, so remove this property for it, and functions it calls. Signed-off-by:
Andrew Lunn <andrew@lunn.ch> Tested-by:
Jamie Lentin <jm@lentin.co.uk> Signed-off-by:
Mike Turquette <mturquette@linaro.org>
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Andrew Lunn authored
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Andrew Lunn authored
Prepare and enable the clocks when the board indicates the pcie buses will be used. Signed-off-by:
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Andrew Lunn authored
Some orion platforms can gate the XOR driver clock. If the clock exisits, unable/disable it as appropriate. Signed-off-by:
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Andrew Lunn authored
Some orion platforms support gating of the clock. If the clock exists enable/disbale it as appropriate. Signed-off-by:
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Andrew Lunn authored
Some orion devices can gate the SDIO clock. If the clock exists, enable/disable it as appropriate. Signed-off-by:
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Andrew Lunn authored
Not all orion platforms can gate the clock, but if it does exist, enable/disable it as appropriate. v2: Fix the name of the clkdev entry. Signed-off-by:
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Andrew Lunn authored
Not all platforms support gating the clock, so it is not an error if the clock does not exist. However, if it does exist, we should enable/disable it as appropriate. Signed-off-by:
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Andrew Lunn authored
The Orion kirkwood chips have a gatable clock per SATA channel. Add code to get and enable this clk if it exists. Signed-off-by:
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Andrew Lunn authored
Let the machine pass to the platform which clock is used by the uart. Enable the clock and use clk_get_rate() to determine its rate. Signed-off-by:
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Andrew Lunn authored
Remove tclk from platform data. This makes the platform data structure empty, so remove it. Signed-off-by:
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Andrew Lunn authored
The t_clk is moved from the shared part of the ethernet driver into the per port section. Each port can have its own gated clock, which it needs to enable/disable, as oppossed to there being one clock shared by all ports. In practice, only kirkwood supports this at the moment. Signed-off-by:
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Andrew Lunn authored
Remove now redundant tclk from SPI platform data. This makes the platform data empty, so remove it. Signed-off-by:
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Andrew Lunn authored
Add tclk as a fixed rate clock for all platforms. In addition, on kirkwood, add a gated clock for most of the clocks which can be gated. Signed-off-by:
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Sascha Hauer authored
Having fixed factors/dividers in hardware is a common pattern, so add a basic clock type doing this. It basically describes a fixed factor clock using a nominator and a denominator. Signed-off-by:
Sascha Hauer <s.hauer@pengutronix.de> Reviewed-by:
Viresh Kumar <viresh.kumar@st.com> Tested-by:
Shawn Guo <shawn.guo@linaro.org> [mturquette@linaro.org: constify parent_names in static init macro] [mturquette@linaro.org: copy/paste bug from mux in static init macro] [mturquette@linaro.org: fix error handling in clk_register_fixed_factor] [mturquette@linaro.org: improve division accuracy; thanks to Saravana] Signed-off-by:
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Mike Turquette authored
The original conversion to struct clk_hw_init failed to add the pointer assignment in clk_register_mux. Signed-off-by:
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Mike Turquette authored
Exposing this option generates confusion and incorrect behavior for single-image builds across platforms. Enable this behavior permanently. Signed-off-by:
Saravana Kannan <skannan@codeaurora.org>
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Mike Turquette authored
Patch 'clk: always pass parent_rate into .round_rate' made a subtle change to the semantics of .round_rate. It is now expected for the parent's rate to always be passed in, simplifying the implemenation of various .round_rate callback definitions. However the patch also introduced a bug in clk_calc_new_rates whereby a clock without the CLK_SET_RATE_PARENT flag set could still propagate a rate change up to a parent clock if the the .round_rate callback modified the &best_parent_rate value in any way. This patch fixes the issue at the framework level (in clk_calc_new_rates) by specifically handling the case where the CLK_SET_RATE_PARENT flag is not set. Signed-off-by:
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- 07 May, 2012 1 commit
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Mike Turquette authored
Signed-off-by:
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- 02 May, 2012 3 commits
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Viresh Kumar authored
This is well documented but isn't implemented. clk_set_rate() must check if flags have CLK_SET_RATE_GATE bit set and is enabled too. Signed-off-by:
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Saravana Kannan authored
Create a struct clk_init_data to hold all data that needs to be passed from the platfrom specific driver to the common clock framework during clock registration. Add a pointer to this struct inside clk_hw. This has several advantages: * Completely hides struct clk from many clock platform drivers and static clock initialization code that don't care for static initialization of the struct clks. * For platforms that want to do complete static initialization, it removed the need to directly mess with the struct clk's fields while still allowing to statically allocate struct clk. This keeps the code more future proof even if they include clk-private.h. * Simplifies the generic clk_register() function and allows adding optional fields in the future without modifying the function signature. * Simplifies the static initialization of clocks on all platforms by removing the need for forward delcarations or convoluted macros. Signed-off-by:
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Rajendra Nayak authored
parent name array is now expected to be const char *, make the relevent changes in the clk macros which define default clock types. Signed-off-by:
Rajendra Nayak <rnayak@ti.com> Signed-off-by:
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- 24 Apr, 2012 18 commits
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Rob Herring authored
Remove trailing whitespace from 2 lines. Signed-off-by:Rob Herring <rob.herring@calxeda.com>
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Rob Herring authored
Using the common clock infrastructure without the common clkdev code makes little sense, so select CLKDEV_LOOKUP for COMMON_CLK. Signed-off-by: -
Viresh Kumar authored
if (!clk->ops->round_rate && (clk->flags & CLK_SET_RATE_PARENT)) is true, then we don't need to set clk->new_rate here, as we will call clk_calc_subtree() afterwards and it also sets clk->new_rate. Signed-off-by:
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Viresh Kumar authored
All macros used for creating different kind of clocks have similar code for initializing struct clk. This patch removes those redundant lines and create another macro DEFINE_CLK. Signed-off-by:
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Viresh Kumar authored
This patch tries to remove duplicate code for clk_gate clocks. This creates another routine clk_gate_endisable() which will take care of enable/disable clock with knowledge of CLK_GATE_SET_TO_DISABLE flag. It works on following logic: For enabling clock, enable = 1 set2dis = 1 -> clear bit -> set = 0 set2dis = 0 -> set bit -> set = 1 For disabling clock, enable = 0 set2dis = 1 -> set bit -> set = 1 set2dis = 0 -> clear bit -> set = 0 So, result is always: enable xor set2dis. Signed-off-by:
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Viresh Kumar authored
CLK_MUX_INDEX_BIT is mistakenly written as CLK_MUX_INDEX_BITWISE in comment. Fix it. CLK_GATE_SET_TO_DISABLE is mistakenly written as CLK_GATE_SET_DISABLE in comment. Fix it. Signed-off-by:
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Shawn Guo authored
Need to propagate round_rate call for the clk that has no .round_rate operation but with flag CLK_SET_RATE_PARENT set. For example, clk_mux is a clk with no .round_rate operation. However, it could likely be in a clk_set_rate propagation path, saying it has parent clk who has .round_rate and .set_rate operations. Signed-off-by:
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Shawn Guo authored
For most of .set_rate implementation, parent_rate will be used, so just like passing parent_rate into .recalc_rate, let's pass parent_rate into .set_rate too. It also updates the kernel doc for .set_rate ops. Signed-off-by:
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Shawn Guo authored
The parent_rate will likely be used by most .round_rate implementation no matter whether flag CLK_SET_RATE_PARENT is set or not, so let's always pass parent_rate into .round_rate. Signed-off-by:
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Mike Turquette authored
This patch is the basic clk version of 'clk: core: copy parent_names & return error codes'. The registration functions are changed to allow the core code to copy the array of strings and allow platforms to declare those arrays as __initdata. This patch also converts all of the basic clk registration functions to return error codes which better aligns them with the existing clk.h api. Signed-off-by: -
Mike Turquette authored
This patch cleans up clk_register and solves a few bugs by teaching clk_register and __clk_init to return error codes (instead of just NULL) to better align with the existing clk.h api. Along with that change this patch also introduces a new behavior whereby clk_register copies the parent_names array, thus allowing platforms to declare their parent_names arrays as __initdata. Signed-off-by: -
Mark Brown authored
Drivers should be able to declare their arrays of parent names as const so the APIs need to accept const arguments. Signed-off-by:
Mark Brown <broonie@opensource.wolfsonmicro.com> [mturquette@linaro.org: constified gate] Signed-off-by:
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Mark Brown authored
The comment is inaccurate (it actually ends the CONFIG_COMMON_CLK section, there's no else) and given that we've just got a single level of ifdef isn't really needed anyway. Signed-off-by:
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Rajendra Nayak authored
Most users of clk_get_rate() actually assume a non zero return value as a valid rate returned. Returing -EINVAL might confuse such users, so make it instead return zero on error. Besides the return value of clk_get_rate seems to be 'unsigned long'. Signed-off-by:
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Shawn Guo authored
Besides the static initialization, the clk_ops of basic clks could also be used by particular clk type being subclass of the basic clks. For example, clk_busy_divider has the same clk_ops as clk_divider, except it has to wait for a busy bit before return success with .set_rate. clk_busy_divider will somehow reuse clk_ops of clk_divider. Since clk-provider.h is included by clk-private.h, it's safe to move those clk_ops declaration of basic clks form clk-private.h into clk-provider.h, so that implementation of clks like clk_busy_divider above do not need to include clk-private.h to access those clk_ops. Signed-off-by:
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Shawn Guo authored
The clk_ops of basic clks should have "const" to match the definition in "struct clk" and clk_register prototype. Signed-off-by:
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Shawn Guo authored
It makes no sense to have EXPORT_SYMBOL_GPL on static functions. Signed-off-by:
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Shawn Guo authored
Change clk_register_mux to use kzalloc, just like what all other basic clk registration functions do. Signed-off-by:
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