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Put NULL test on the result of the previous call instead on one of its
arguments. A simplified version of the semantic match that finds this
problem is as follows (http://coccinelle.lip6.fr/):
// <smpl>
r@
expression *e1;
expression *e2;
identifier f;
statement S1,S2;
@@
e1 = f(...,e2,...);
(
if (e1 == NULL || ...) S1 else S2
|
*if (e2 == NULL || ...) S1 else S2
)
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
When we introduced the parent_map tables, we missed to update
some of the functions where mapping is translated. Fix this.
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Tested-by: Nicolas Dechesne <nicolas.dechesne@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Support for Qualcomm's clock controllers should be available only
on Qualcomm platforms.
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The NAND controller within EBI2 requires EBI2_CLK and
EBI2_ALWAYS_ON_CLK clocks. Create structs for these clocks so
that they can be used by the NAND controller driver. Add an entry
for EBI2_AON_CLK in the gcc-ipq806x DT binding document.
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
of_device_id is always used as const.
(See driver.of_match_table and open firmware functions)
__initdata updated to __initconst for
static const struct of_device_id ti_clkdm_match_table[]
Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Add clock controller for CMU ISP clock domain on Exynos3250,
providing clocks for FIMC-IS subsystem.
[b.michalska: use samsung_cmu_register_one to register
the provider; updated DT binding documentation]
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Beata Michalska <b.michalska@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
[s.nawrocki: added __init attribute which was missing in function
exynos3250_cmu_platform_init() in function, which has been]
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
This patch add CLKOUT driver support for Exynos3250 SoC.
Exynos3250 SoC PMU_DEBUG is the same with Exynos4's PMU_DEBUG
including CLKOUT mux. So we can use the exynos4's clkout init
function for Exynos3250 without the need to add new function.
Signed-off-by: Inha Song <ideal.song@samsung.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
The regmap_config struct may be const because it is not modified by the
driver and regmap_init() accepts pointer to const.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The regmap_config struct may be const because it is not modified by the
driver and regmap_init() accepts pointer to const.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The regmap_config struct may be const because it is not modified by the
driver and regmap_init() accepts pointer to const.
Replace doubled const in the arrays of clock names with proper const
pointer to const data. This fixes the warnings:
drivers/clk/clk-si5351.c:71:25: warning: duplicate const
drivers/clk/clk-si5351.c:74:25: warning: duplicate const
drivers/clk/clk-si5351.c:77:25: warning: duplicate const
drivers/clk/clk-si5351.c:80:25: warning: duplicate const
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
drivers/clk/qcom/clk-pll.c:74:1-4: WARNING: end returns can be simpified
Simplify a trivial if-return sequence. Possibly combine with a
preceding function call.
Generated by: scripts/coccinelle/misc/simple_return.cocci
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
These frequency tables list the wrong rates. Either they don't
have the correct frequency at all, or they're specified in kHz
instead of Hz. Fix it.
Fixes: c99e515a92 "clk: qcom: Add IPQ806X LPASS clock controller (LCC) driver"
Tested-by: Kenneth Westfield <kwestfie@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The usual round of clock changes for the Allwinner SoCs.
There is nothing really standing out here, but a few changes and fixes, most
notably to allow the AHB clock to be parented to a PLL, instead of the CPU
clock to avoid any AHB rate change due to cpufreq.
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Merge tag 'sunxi-clocks-for-4.1' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into clk-next
Allwinner clocks changes for 4.1
The usual round of clock changes for the Allwinner SoCs.
There is nothing really standing out here, but a few changes and fixes, most
notably to allow the AHB clock to be parented to a PLL, instead of the CPU
clock to avoid any AHB rate change due to cpufreq.
The pll6 has a /4 output that is used as an input to the ahb mux clock.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The current sunxi clock driver has the base factor clock of divs clocks
as the last clock output of the clock node. This makes it rather difficult
to add new outputs, such as fixed dividers, which were previously unknown.
This patch makes the divs clocks data structure specify which output is
the factor clock, and updates all current divs clocks accordingly.
We can then add new outputs after the factor clocks, at least not breaking
backward compatibility with regards to the devicetree bindings.
Also replace kzalloc with kcalloc in sunxi_divs_clk_setup().
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Since we have a fractional divider for the synthesizer, just implement
a simple multiply logic for the PLL.
It seems the PLL divider needs to have also the multiplier set for the PLL
to lock. At least I have not yet figured out if divided rates are doable.
So let's just ignore the PLL divider for now as the synthesizer has both
integer and fractional dividers so we don't even need to use the PLL
divider for the rates we know work with PLL locking.
Cc: Brian Hutchinson <b.hutchman@gmail.com>
Cc: Matthijs van Duin <matthijsvanduin@gmail.com>
Cc: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
We can pretty much get any rate out of the FAPLL because of the fractional
divider. Let's first try just adjusting the post divider, and if that is
not enough, then reprogram both the fractional divider and the post divider.
Let's also add a define for the fixed SYNTH_PHASE_K instead of using 8.
Cc: Brian Hutchinson <b.hutchman@gmail.com>
Cc: Matthijs van Duin <matthijsvanduin@gmail.com>
Cc: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
We need to round the calculated value to have it match the requested rate.
While at it, let's fix a typo and use a define for SYNTH_MAX_DIV_M as we
will need it in later patches for set_rate.
And let's remove two unused includes.
Cc: Brian Hutchinson <b.hutchman@gmail.com>
Cc: Matthijs van Duin <matthijsvanduin@gmail.com>
Cc: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
The OMAP DMTimer API, omap_dm_timer_set_source(), uses the clock name
timer_sys_ck for setting a timer's clock source for the source index
OMAP_TIMER_SRC_SYS_CLK. There is currently no clock alias data for
the Timers 13 through 16 for this clock name, so add the same.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
The OMAP DMTimer API, omap_dm_timer_set_source(), can set the parent
of a timer node using 3 different values that use fixed parent names
for the clocks. The parent name, timer_sys_ck, is used for setting the
parent when used with the source index OMAP_TIMER_SRC_SYS_CLK. This
should point to the TIMER_SYS_CLK and not the SYSCLKIN2, so correct
the clock aliases appropriately. SYSCLKIN2 is not a mandatory clock
input.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
The DT clock aliases for Timers use the legacy (non-DT) device
names and a source clock named sys_ck. OMAP5 is DT-boot only,
so correct the DT clock aliases to use the DT device names
instead. Also, the source clock name is corrected from 'sys_ck'
to 'timer_sys_ck', the name used by the OMAP dmtimer driver.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
The DT clock aliases for timers using the legacy OMAP timer
device names have been cleaned up. These device names reflect
the names used in legacy boot, and are no longer applicable
as OMAP4 is DT boot only now.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Correct the McBSP2/4 ick mapping (they were 2->4 and 4->2).
Add missing mcbsp clock aliases.
Collect the McBSP clock definition in one location at the same time.
Fixes the following warning on boot:
[ 0.307739] omap_hwmod: mcbsp2: _wait_target_ready failed: -16
[ 0.307769] omap_hwmod: mcbsp2: cannot be enabled for reset (3)
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
In DT boot we do not have devices named as omap-mcbsp.X.
Correct the McBSP2/4 ick mapping (they were 2->4 and 4->2).
Collect the McBSP clock definition in one location at the same time.
Fixes the following warning on boot:
[ 0.307739] omap_hwmod: mcbsp2: _wait_target_ready failed: -16
[ 0.307769] omap_hwmod: mcbsp2: cannot be enabled for reset (3)
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
There is a case where NULL can be a valid return value for
ti_clk_get_reg_addr, specifically the case where both the provider index
and register offsets are zero. In this case, the current error checking
against a NULL pointer will fail. Thus, change the API to return a
ERR_PTR value in an error case, and change all the users of this API to
check against IS_ERR instead.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Michael Turquette <mturquette@linaro.org>
This patch adds support for the global clock controller found on the MSM8916
based devices. It allows the various device drivers to probe and control
their clocks and resets.
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
[sboyd@codeaurora.org: Removed NULL entry from parent_maps]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
In the current parent mapping code, we can get duplicate or inconsistent
indexes, which leads to discrepancy between the number of elements in the
array and the number of parents. Until now, this was solved with some
reordering but this is not always possible.
This patch introduces index tables that are used to define the relations
between the PLL source and the hardware mux configuration value.
To accomplish this, here we do the following:
- Define a parent_map struct to map the relations between PLL source index
and register configuration value.
- Add a qcom_find_src_index() function for finding the index of a clock
matching the specific PLL configuration.
- Update the {set,get}_parent RCG functions use the newly introduced
parent_map struct.
- Convert all existing drivers to the new parent_map tables.
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Currently configure_bank() returns void. Add some error
checking on the regmap calls and propagate if there is
any error.
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
According to the common clock framework API, the clk_get_parent() function
should return u8. Currently we are returning negative values on error. Fix
this and use the default parent in case of an error.
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Currently, a RCG's M/N counter (used for fraction division) is
set to either 'bypass' (counter disabled) or 'dual edge' (counter
enabled) based on whether the corresponding rcg struct has a mnd
field specified and a non-zero N.
In the case where M and N are the same value, the M/N counter is
still enabled by code even though no division takes place.
Leaving the RCG in such a state can result in improper behavior.
This was observed with the DSI pixel clock RCG when M and N were
both set to 1.
Add an additional check (M != N) to enable the M/N counter only
when it's needed for fraction division.
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Fixes: bcd61c0f53 (clk: qcom: Add support for root clock
generators (RCGs))
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
We want to reparent AHB clock to PLL6 on sun5i/sun7i using the assigned
clocks properties. AHB is a factor clock, while PLL6 is a divs clock.
Register divs clocks before factor clocks so reparenting works. This
is only needed because we do the reparenting on the clock provider.
The proper way to fix this is to split out all the old sunxi clocks
into separate CLK_OF_DECLARE statements, like we are doing for sun9i.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Now that the ahb clock on sun5i/sun7i is muxable, ahb is no longer
guaranteed to be a child of the cpu clock. Add the cpu clock to
the list of protected clocks so it doesn't get disabled.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The AHB clock on sun5i and sun7i are muxable divider clocks.
Use a factors clock to support them.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
of_clk_get_by_clkspec() has the same function signature as
of_clk_get_from_provider()
struct clk *of_clk_get_by_clkspec(struct of_phandle_args
*clkspec)
struct clk *of_clk_get_from_provider(struct of_phandle_args
*clkspec)
except of_clk_get_by_clkspec() checks to make sure clkspec is not
NULL. Let's remove of_clk_get_by_clkspec() and replace the
callers of it (clkconf.c) with of_clk_get_from_provider().
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The child_node member of struct clk is named the same as the
child_node member of struct clk_core. Let's rename the struct
clk's member to clks_node to avoid getting confused with the
child_node member of struct clk_core and to match the name of the
list head, clks.
Reviewed-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Cc: Alban Browaeys <alban.browaeys@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The ahbix clock can never be turned off in practice. To change the
rates we need to switch the mux off the M/N counter to an always on
source (XO), reprogram the M/N counter to get the rate we want and
finally switch back to the M/N counter. Add a new ops structure
for this type of clock so that we can set the rate properly.
Fixes: c99e515a92 "clk: qcom: Add IPQ806X LPASS clock controller (LCC) driver"
Tested-by: Kenneth Westfield <kwestfie@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
PXO is 25MHz, not 27MHz. Fix the table.
Fixes: 24d8fba44a "clk: qcom: Add support for IPQ8064's global
clock controller (GCC)"
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Reviewed-by: Andy Gross <agross@codeaurora.org>
Tested-by: Andy Gross <agross@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
If a driver calls clk_set_parent(clk, parent) and parent is the
current parent of clk we shouldn't fail in any case.
Unfortunately if clk is a read-only mux we return -ENOSYS
because we think we can't change the parent, except for in this
special case where we don't actually need to change the parent at
all. Return 0 in such a situation.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
It's useful to have tracepoints around operations that change the
hardware state so that we can debug clock hardware performance
and operations. Four basic types of events are supported: on/off
events for enable, disable, prepare, unprepare that only record
an event and a clock name, rate changing events for
clk_set_{min_,max_}rate{_range}(), phase changing events for
clk_set_phase() and parent changing events for clk_set_parent().
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
If a clock's clk_ops doesn't have the set_phase op set we should
return an error from clk_set_phase(). This way clock consumers
know that when they tried to set a phase it didn't work, as
opposed to the current behavior where the return value is 0
meaning success.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
If the divider or multiplier values are 0 in the register, bypassing the
divider and returning the parent clock rate in clk_fd_recalc_rate().
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
[mturquette@linaro.org: fixed commitlog typo]
Add lockdep asserts for holding the prepare_lock to all functions
marking this as a requirement in description. Add this to private and
exported functions so all locking misuse could be detected during
debugging.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
Some drivers compare struct clk pointers as a means of knowing
if the two pointers reference the same clock hardware. This behavior is
dubious (drivers must not dereference struct clk), but did not cause any
regressions until the per-user struct clk patch was merged. Now the test
for matching clk's will always fail with per-user struct clk's.
clk_is_match is introduced to fix the regression and prevent drivers
from comparing the pointers manually.
Fixes: 035a61c314 ("clk: Make clk API return per-user struct clk instances")
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
[arnd@arndb.de: Fix COMMON_CLK=N && HAS_CLK=Y config]
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
[sboyd@codeaurora.org: const arguments to clk_is_match() and
remove unnecessary ternary operation]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@r@
type T;
identifier f;
@@
static T f (...) { ... }
@@
identifier r.f;
declarer name EXPORT_SYMBOL_GPL;
@@
-EXPORT_SYMBOL_GPL(f);
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Fixes: 035a61c314 "clk: Make clk API return per-user struct clk instances"
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Similar to the reasoning for the previous commit
DIV_ROUND_CLOSEST(parent_rate, rate)
might not be the best integer divisor to get a good approximation for
rate from parent_rate (given the metric for CLK_DIVIDER_ROUND_CLOSEST).
For example assume a parent rate of 1000 Hz and a target rate of 700.
Using DIV_ROUND_CLOSEST the suggested divisor gets calculated to 1
resulting in a target rate of 1000 with a delta of 300 to the desired
rate. With choosing 2 as divisor however the resulting rate is 500 which
is nearer to 700.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
It's an invalid approach to assume that among two divider values
the one nearer the exact divider is the better one.
Assume a parent rate of 1000 Hz, a divider with CLK_DIVIDER_POWER_OF_TWO
and a target rate of 89 Hz. The exact divider is ~ 11.236 so 8 and 16
are the candidates to choose from yielding rates 125 Hz and 62.5 Hz
respectivly. While 8 is nearer to 11.236 than 16 is, the latter is still
the better divider as 62.5 is nearer to 89 than 125 is.
Fixes: 774b514390 (clk: divider: Add round to closest divider)
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Maxime Coquelin <maxime.coquelin@st.com>
Signed-off-by: Michael Turquette <mturquette@linaro.org>
