Add logic which (if specified for a pll) can verify that a PLL is set
to the proper default value and if not can set it. This can be
specified per PLL as each will have different default values.
Based on original work by Aleksandr Frid <afrid@nvidia.com>
Signed-off-by: Bill Huang <bilhuang@nvidia.com>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This code makes use of the SDM fractional divider if present to
constrain the allowable programming range of the PLL divider register
bitfields to take advantage of higher frequency granularity that can
be induced by the SDM divider.
Based on original work by Aleksandr Frid <afrid@nvidia.com>
Signed-off-by: Bill Huang <bilhuang@nvidia.com>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Tegra210 SoC's have 2 PLLs for memory usage. Add plumbing to register
and handle PLLMB.
PLLMB is used to allow switching between 2 PLLM's without having to use
and intermediate backup PLL, as we need to lock the PLL before we can
switch to it.
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
On Tegra210 SoC's, the logic to enable several of the plls is different
from previous generations. Therefore, add registration functions specific
to Tegra210 which will handle them appropriately.
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
PLLM is fixed for Tegra30 up through Tegra114. Starting with Tegra124
PLLM can change rate. Mark PLLM as TEGRA_PLL_FIXED for the generations
where it should be. Modify the check in clk_pll_round_rate() and
clk_pll_recalc_rate() to allow for the non-fixed version to return the
correct rate.
Note that there is no change for Tegra20. This is because PLLM is not
distinguished in that driver, and adding either the PLLM or FIXED_RATE
flags will cause potential problems.
PLLM never supported dynamic ramping. On Tegra20 and Tegra30, there is
no dynamic ramping at all, and on Tegra114, Tegra124 and Tegra132, only
PLLX and PLLC support dynamic ramping, so we can go ahead and remove the
specialized pllm_ops.
Signed-off-by: Danny Huang <dahuang@nvidia.com>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This removes the conversion from pdiv to hw, which is already taken
care of by _get_table_rate before this code is run. This avoids
incorrectly converting pdiv to hw twice and getting the wrong hw value.
Also set the input_rate in the freq cfg in _calc_dynamic_ramp_rate while
setting all the other fields.
In order to prevent regressions on earlier SoC generations, all of the
frequency tables need to be updated so that they contain the actual
divider values. If they contain hardware values these would be converted
to hardware values again, yielding the wrong value.
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
[treding@nvidia.com: fix regressions on earlier SoC generations]
Signed-off-by: Thierry Reding <treding@nvidia.com>
If a PLL has a reset_reg specified, properly handle that in the
enable/disable logic paths.
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Bill Huang <bilhuang@nvidia.com>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
For Tegra210, the logic to calculate out-of-table rates is different
from previous generations. Add callbacks that can be overridden to
allow for different ways of calculating rates. Default to
_cal_rate when not specified.
This patch also includes a new flag which is used to set which method
of fixed_mdiv calculation is used. The new method for calculating the
fixed divider value for M can be more accurate especially when
fractional dividers are in play. This allows for older chipsets to use
the existing logic and new generations to use a newer version which
may work better for them.
Based on original work by Aleksandr Frid <afrid@nvidia.com>
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This adds logic for taking SDM_DIN (Sigma Delta Modulator) setting into
the equation to calculate the effective N value for PLL which supports
fractional divider.
The effective N = NDIV + 1/2 + SDM_DIN/2^13, where NDIV is the integer
feedback divider.
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
SoC specific drivers should define the appropriate flags for each
PLL rather than relying on the registration functions to automatically
set flags on their behalf. This will properly allow for changes between
SoC generations where flags might be different and allow sharing the
same logic functions.
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
New SoC's may have more than 3 MISC registers, so bump up the array size
and use a #define to be more informative about the value.
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Bill Huang <bilhuang@nvidia.com>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Swap out the generic WARN_ON with a WARN which gives more information
about what is happening.
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Instead of having multiple similar wrapper functions for
_clk_pll_[enable|disable], we can simplify it to single
wrappers and use checks to avoid the logic we don't want to use.
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Create a wrapper interface to make use of the existing
clk_pll_wait_for_lock. This will be useful for implementations
of callbacks in Tegra SoC specific clock drivers.
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Tegra210 has significant differences in muxes for peripheral clocks.
One of the most important changes is that pll_m isn't to be used
as a source for peripherals. Therefore, we need to define the new
muxes and new clocks to use those muxes for Tegra210 support.
Tegra210 has some differences in the PLLP clock tree:
- Four new output clocks: PLLP_OUT_CPU, PLLP_OUT_ADSP, PLLP_OUT_HSIO,
and PLLP_OUT_XUSB.
- PLLP_OUT2 is fixed at 1/2 the rate of PLLP_VCO.
- PLLP_OUT4 is the child of PLLP_OUT_CPU.
Update the xusb_hs_src mux and add the xusb_ssp_src mux for Tegra210.
Including work by Andrew Bresticker <abrestic@chromium.org> and
Bill Huang <bilhuang@nvidia.com>.
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Use unsigned int for loop variables that can never become negative and
remove a couple of gratuitous blank lines. Also use single spaces around
operators and use a single space instead of a tab to separate comments
from code.
Signed-off-by: Thierry Reding <treding@nvidia.com>
The OSC_FREQ field of the OSC_CTRL register uses the value 12 for an
oscillator frequency of 26 MHz, not 260 MHz. This isn't really critical
because I don't think boards with such an oscillator have ever existed,
much less been supported upstream.
Signed-off-by: Thierry Reding <treding@nvidia.com>
This contains a patch that allows the DFLL to use clock rates higher
than 2^31-1 Hz by using the ->determine_rate() operation instead of the
->round_rate() operation. Other than that there's a couple of cleanups
in preparation for Tegra210 support.
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Merge tag 'tegra-for-4.4-clk' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into clk-next
clk: tegra: Changes for v4.4-rc1
This contains a patch that allows the DFLL to use clock rates higher
than 2^31-1 Hz by using the ->determine_rate() operation instead of the
->round_rate() operation. Other than that there's a couple of cleanups
in preparation for Tegra210 support.
tegra_audio_clk_init was written expecting a single PLL to be
passed in directly. Change this to accept an array which will
allow for supporting multiple plls and specifying specific data
about them, like their parent, which may change over time.
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Benson Leung pointed out that the kerneldoc for this structure has
become stale. Update the field descriptions to match the structure
content.
Reported-by: Benson Leung <bleung@chromium.org>
Acked-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Some fields moved from the tegra_clk_pll struct to the tegra_pll_params
struct. Update the struct comments to reflect where the fields really
are.
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Acked-By: Peter De Schrijver <pdeschrijver@nvidia.com>
Reviewed-by: Benson Leung <bleung@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The monitor code is used with DEBUG_FS only, so move it into the
corresponding #ifdef block to avoid potential compiler warnings.
Signed-off-by: Thierry Reding <treding@nvidia.com>
for_each_child_of_node performs an of_node_put on each iteration, so
putting an of_node_put before a continue results in a double put.
The semantic match that finds this problem is as follows
(http://coccinelle.lip6.fr):
// <smpl>
@@
expression root,e;
local idexpression child;
iterator name for_each_child_of_node;
@@
for_each_child_of_node(root, child) {
... when != of_node_get(child)
* of_node_put(child);
...
* continue;
}
// </smpl>
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The OPP list needs to be protected against concurrent accesses. Using
simple RCU read locks does the trick and gets rid of the following
lockdep warning:
===============================
[ INFO: suspicious RCU usage. ]
4.2.0-next-20150908 #1 Not tainted
-------------------------------
drivers/base/power/opp.c:460 Missing rcu_read_lock() or dev_opp_list_lock protection!
other info that might help us debug this:
rcu_scheduler_active = 1, debug_locks = 0
4 locks held by kworker/u8:0/6:
#0: ("%s""deferwq"){++++.+}, at: [<c0040d8c>] process_one_work+0x118/0x4bc
#1: (deferred_probe_work){+.+.+.}, at: [<c0040d8c>] process_one_work+0x118/0x4bc
#2: (&dev->mutex){......}, at: [<c03b8194>] __device_attach+0x20/0x118
#3: (prepare_lock){+.+...}, at: [<c054bc08>] clk_prepare_lock+0x10/0xf8
stack backtrace:
CPU: 2 PID: 6 Comm: kworker/u8:0 Not tainted 4.2.0-next-20150908 #1
Hardware name: NVIDIA Tegra SoC (Flattened Device Tree)
Workqueue: deferwq deferred_probe_work_func
[<c001802c>] (unwind_backtrace) from [<c00135a4>] (show_stack+0x10/0x14)
[<c00135a4>] (show_stack) from [<c02a8418>] (dump_stack+0x94/0xd4)
[<c02a8418>] (dump_stack) from [<c03c6f6c>] (dev_pm_opp_find_freq_ceil+0x108/0x114)
[<c03c6f6c>] (dev_pm_opp_find_freq_ceil) from [<c0551a3c>] (dfll_calculate_rate_request+0xb8/0x170)
[<c0551a3c>] (dfll_calculate_rate_request) from [<c0551b10>] (dfll_clk_round_rate+0x1c/0x2c)
[<c0551b10>] (dfll_clk_round_rate) from [<c054de2c>] (clk_calc_new_rates+0x1b8/0x228)
[<c054de2c>] (clk_calc_new_rates) from [<c054e44c>] (clk_core_set_rate_nolock+0x44/0xac)
[<c054e44c>] (clk_core_set_rate_nolock) from [<c054e4d8>] (clk_set_rate+0x24/0x34)
[<c054e4d8>] (clk_set_rate) from [<c0512460>] (tegra124_cpufreq_probe+0x120/0x230)
[<c0512460>] (tegra124_cpufreq_probe) from [<c03b9cbc>] (platform_drv_probe+0x44/0xac)
[<c03b9cbc>] (platform_drv_probe) from [<c03b84c8>] (driver_probe_device+0x218/0x304)
[<c03b84c8>] (driver_probe_device) from [<c03b69b0>] (bus_for_each_drv+0x60/0x94)
[<c03b69b0>] (bus_for_each_drv) from [<c03b8228>] (__device_attach+0xb4/0x118)
ata1: SATA link down (SStatus 0 SControl 300)
[<c03b8228>] (__device_attach) from [<c03b77c8>] (bus_probe_device+0x88/0x90)
[<c03b77c8>] (bus_probe_device) from [<c03b7be8>] (deferred_probe_work_func+0x58/0x8c)
[<c03b7be8>] (deferred_probe_work_func) from [<c0040dfc>] (process_one_work+0x188/0x4bc)
[<c0040dfc>] (process_one_work) from [<c004117c>] (worker_thread+0x4c/0x4f4)
[<c004117c>] (worker_thread) from [<c0047230>] (kthread+0xe4/0xf8)
[<c0047230>] (kthread) from [<c000f7d0>] (ret_from_fork+0x14/0x24)
Signed-off-by: Thierry Reding <treding@nvidia.com>
Fixes: c4fe70ada4 ("clk: tegra: Add closed loop support for the DFLL")
[vince.h@nvidia.com: Unlock rcu on error path]
Signed-off-by: Vince Hsu <vince.h@nvidia.com>
[sboyd@codeaurora.org: Dropped second hunk that nested the rcu
read lock unnecessarily]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The new determine_rate prototype allows for clock rates exceeding
2^31-1 Hz to be used. Switch the DFLL clock to use determine_rate
instead of round_rate and unlock the top rates supported by the
Tegra124.
Signed-off-by: Mikko Perttunen <mikko.perttunen@kapsi.fi>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The latest Tegra clk pull had some problems. Fix them.
drivers/clk/tegra/clk-tegra124.c:1450:6: warning: symbol 'tegra124_clock_assert_dfll_dvco_reset' was not declared. Should it be static?
drivers/clk/tegra/clk-tegra124.c:1466:6: warning: symbol 'tegra124_clock_deassert_dfll_dvco_reset' was not declared. Should it be static?
drivers/clk/tegra/clk-tegra124.c:1476:5: warning: symbol 'tegra124_reset_assert' was not declared. Should it be static?
drivers/clk/tegra/clk-tegra124.c:1486:5: warning: symbol 'tegra124_reset_deassert' was not declared. Should it be static?
drivers/clk/tegra/clk-dfll.c:590 dfll_load_i2c_lut() warn: inconsistent indenting
drivers/clk/tegra/clk-dfll.c:1448 dfll_build_i2c_lut() warn: unsigned 'td->i2c_lut[0]' is never less than zero.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This contains the DFLL driver needed to implement CPU frequency scaling
on Tegra.
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Merge tag 'tegra-for-4.3-clk' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into clk-next
clk: tegra: Changes for v4.3-rc1
This contains the DFLL driver needed to implement CPU frequency scaling
on Tegra.
Use the provider based method to get a clock's name so that we
can get rid of the clk member in struct clk_hw one day. Mostly
converted with the following coccinelle script.
@@
struct clk_hw *E;
@@
-__clk_get_name(E->clk)
+clk_hw_get_name(E)
Acked-by: Heiko Stuebner <heiko@sntech.de>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Peter De Schrijver <pdeschrijver@nvidia.com>
Cc: Prashant Gaikwad <pgaikwad@nvidia.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Thierry Reding <treding@nvidia.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Tero Kristo <t-kristo@ti.com>
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Andrew Bresticker <abrestic@chromium.org>
Cc: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Kevin Cernekee <cernekee@chromium.org>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Ulrich Hecht <ulrich.hecht+renesas@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-rockchip@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-tegra@vger.kernel.org
Cc: linux-omap@vger.kernel.org
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
We're removing struct clk from the clk provider API, so switch
this code to using the clk_hw based provider APIs.
Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* 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
...
Clock rates are stored in an unsigned long field, but ->determine_rate()
(which returns a rounded rate from a requested one) returns a long
value (errors are reported using negative error codes), which can lead
to long overflow if the clock rate exceed 2Ghz.
Change ->determine_rate() prototype to return 0 or an error code, and pass
a pointer to a clk_rate_request structure containing the expected target
rate and the rate constraints imposed by clk users.
The clk_rate_request structure might be extended in the future to contain
other kind of constraints like the rounding policy, the maximum clock
inaccuracy or other things that are not yet supported by the CCF
(power consumption constraints ?).
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
CC: Jonathan Corbet <corbet@lwn.net>
CC: Tony Lindgren <tony@atomide.com>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: "Emilio López" <emilio@elopez.com.ar>
CC: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
CC: Peter De Schrijver <pdeschrijver@nvidia.com>
CC: Prashant Gaikwad <pgaikwad@nvidia.com>
CC: Stephen Warren <swarren@wwwdotorg.org>
CC: Thierry Reding <thierry.reding@gmail.com>
CC: Alexandre Courbot <gnurou@gmail.com>
CC: linux-doc@vger.kernel.org
CC: linux-kernel@vger.kernel.org
CC: linux-arm-kernel@lists.infradead.org
CC: linux-omap@vger.kernel.org
CC: linux-mips@linux-mips.org
CC: linux-tegra@vger.kernel.org
[sboyd@codeaurora.org: Fix parent dereference problem in
__clk_determine_rate()]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Tested-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
[sboyd@codeaurora.org: Folded in fix from Heiko for fixed-rate
clocks without parents or a rate determining op]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Clock provider drivers generally shouldn't include clk.h because
it's the consumer API. Only include clk.h in files that are using
it. Also add in a clkdev.h include that was missing in a file
using clkdev APIs.
Cc: Peter De Schrijver <pdeschrijver@nvidia.com>
Cc: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The DFLL clocksource was missing from the list of possible parents for
the fast CPU cluster. Add it to the list.
Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Signed-off-by: Mikko Perttunen <mikko.perttunen@kapsi.fi>
Acked-by: Michael Turquette <mturquette@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Save and restore this register since the LP1 restore assembly routines
fiddle with it. Otherwise the CPU would keep running on PLLX after
resume from suspend even when DFLL was the original clocksource.
Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Signed-off-by: Mikko Perttunen <mikko.perttunen@kapsi.fi>
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: Michael Turquette <mturquette@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Add basic platform driver support for the fast CPU cluster DFLL
clocksource found on Tegra124 SoCs. This small driver selects the
appropriate Tegra124-specific characterization data and integration
code. It relies on the DFLL common code to do most of the work.
Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Signed-off-by: Mikko Perttunen <mikko.perttunen@kapsi.fi>
Acked-by: Michael Turquette <mturquette@linaro.org>
[treding@nvidia.com: move setup code into ->probe()]
Signed-off-by: Thierry Reding <treding@nvidia.com>
The DVCO present in the DFLL IP block has a separate reset line,
exposed via the CAR IP block. This reset line is asserted upon SoC
reset. Unless something (such as the DFLL driver) deasserts this
line, the DVCO will not oscillate, although reads and writes to the
DFLL IP block will complete.
Thanks to Aleksandr Frid <afrid@nvidia.com> for identifying this and
saving hours of debugging time.
Signed-off-by: Paul Walmsley <pwalmsley@nvidia.com>
[ttynkkynen: ported to tegra124 from tegra114]
Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
[mikko.perttunen: ported to special reset callback]
Signed-off-by: Mikko Perttunen <mikko.perttunen@kapsi.fi>
Acked-by: Michael Turquette <mturquette@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
This patch allows SoC-specific CAR initialization routines to register
their own reset_assert and reset_deassert callbacks with the common Tegra
CAR code. If defined, the common code will call these callbacks when a
reset control with number >= num_periph_banks * 32 is attempted to be asserted
or deasserted respectively. Numbers greater than or equal to num_periph_banks * 32
are used to avoid clashes with low numbers that are automatically mapped to
standard CAR reset lines.
Each SoC with these special resets should specify the defined reset control
numbers in a device tree header file.
Signed-off-by: Mikko Perttunen <mikko.perttunen@kapsi.fi>
Acked-by: Michael Turquette <mturquette@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Tegra CVB tables encode the relationship between operating voltage
and optimal frequency as a function of the so-called speedo value.
The speedo value is written to the on-chip fuses at the factory,
which allows the voltage-frequency operating points to be calculated
on an per-chip basis.
Add utility functions to parse the Tegra-specific tables and export the
voltage-frequency pairs to the generic OPP framework for other drivers
to use.
Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Signed-off-by: Mikko Perttunen <mikko.perttunen@kapsi.fi>
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: Michael Turquette <mturquette@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
With closed loop support, the clock rate of the DFLL can be adjusted.
The oscillator itself in the DFLL is a free-running oscillator whose
rate is directly determined the supply voltage. However, the DFLL
module contains logic to compare the DFLL output rate to a fixed
reference clock (51 MHz) and make a decision to either lower or raise
the DFLL supply voltage. The DFLL module can then autonomously change
the supply voltage by communicating with an off-chip PMIC via either I2C
or PWM signals. This driver currently supports only I2C.
Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Signed-off-by: Mikko Perttunen <mikko.perttunen@kapsi.fi>
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: Michael Turquette <mturquette@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Add shared code to support the Tegra DFLL clocksource in open-loop
mode. This root clocksource is present on the Tegra124 SoCs. The
DFLL is the intended primary clock source for the fast CPU cluster.
This code is very closely based on a patch by Paul Walmsley from
December (http://comments.gmane.org/gmane.linux.ports.tegra/15273),
which in turn comes from the internal driver by originally created
by Aleksandr Frid <afrid@nvidia.com>.
Subsequent patches will add support for closed loop mode and drivers
for the Tegra124 fast CPU cluster DFLL devices, which rely on this
code.
Signed-off-by: Paul Walmsley <pwalmsley@nvidia.com>
Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Signed-off-by: Mikko Perttunen <mikko.perttunen@kapsi.fi>
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Acked-by: Michael Turquette <mturquette@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The HDA to codec clock is named hda2codec_2x, so use the proper name in
the clock table.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The EMC clock driver uses symbols exported by the EMC driver, so it
needs the corresponding dependency to avoid build breakage.
Signed-off-by: Thierry Reding <treding@nvidia.com>
As opposed to round_rate(), determine_rate() can take rate constraints
into account when choosing the best rate.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
On Tegra124, as we now have a proper driver for the EMC.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The driver is currently only tested on Tegra124 Jetson TK1, but should
work with other Tegra124 boards, provided that correct EMC tables are
provided through the device tree. Older chip models have differing
timing change sequences, so they are not currently supported.
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
[treding@nvidia.com: use more consistent function names]
Signed-off-by: Thierry Reding <treding@nvidia.com>
This clock has never been able to do anything.
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The current parent, plld_out0, does not exist. The proper name is
pll_d_out0. While at it, rename the plld_dsi clock to pll_d_dsi_out to
be more consistent with other clock names.
Fixes: b270491eb9 ("clk: tegra: Define PLLD_DSI and remove dsia(b)_mux")
Signed-off-by: Thierry Reding <treding@nvidia.com>
There is no reason why Tegra114 cannot use the same generic code to set
up the oscillator, clk_m and pll_ref clocks. The only effective change
that this causes is that the CLK_SET_PARENT_RATE flag is dropped, but
since these clocks are all fixed it is not needed anyway.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Currently the Tegra clock driver simplifies the clock tree somewhat by
taking advantage of the fact that clk_m runs at the same frequency as
the oscillator. While that's true on all currently supported SoCs, it
does not apply to Tegra210 anymore. On Tegra210 clk_m is typically
divided down from the oscillator frequency. To support that setup, add
a separate clock for the oscillator that both clk_m and pll_ref derive
from.
Modify the tegra_osc_clk_init() function to take an additional divider
parameter for clk_m. Existing SoCs always pass in 1, whereas Tegra210
will read the divider from a register in the clock & reset controller.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Tegra210 has an extra bank of peripheral clock registers. Add it to the
generic peripheral clock code.
Cc: Peter De Schrijver <pdeschrijver@nvidia.com>
Cc: Prashant Gaikwad <pgaikwad@nvidia.com>
Reviewed-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The number of resets controls is 32 times the number of peripheral
register banks rather than 32 times the number of clocks. This reduces
(drastically) the number of reset controls registered from 10080 (315
clocks * 32) to 224 (6 peripheral register banks * 32).
This also fixes a potential crash because trying to use any of the
excess reset controls (224-10079) would have caused accesses beyond
the array bounds of the peripheral register banks definition array.
Cc: Peter De Schrijver <pdeschrijver@nvidia.com>
Cc: Prashant Gaikwad <pgaikwad@nvidia.com>
Fixes: 6d5b988e7d ("clk: tegra: implement a reset driver")
Cc: stable@vger.kernel.org # 3.14+
Signed-off-by: Thierry Reding <treding@nvidia.com>
The ret variable is often explicitly initialized to 0, but there is no
need to do so in many cases because it will immediately be overwritten
with the return value from a function.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Some of the .dev_id entries in the devclks table were oddly indented.
Make them consistent with the rest of the table.
Reviewed-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Add the clocks used for HDMI audio played through the HDA controller.
Initialize the codec clock to 48Mhz and the HDA clock to 102MHz per
the TRM.
Signed-off-by: Dylan Reid <dgreid@chromium.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The second to last parameter of the TEGRA_CLK_PERIPH macro denotes a
table and should therefore users should pass in NULL instead of 0.
Fixes a bunch of sparse warnings like this:
warning: Using plain integer as NULL pointer
Reviewed-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The clock initialization structure is named struct clk_init_table.
Update the kerneldoc comment to use the correct name.
Reviewed-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
PLLD is the only parent for DSIA & DSIB on Tegra124 and
Tegra132. Besides, BIT 30 in PLLD_MISC register controls
the output of DSI clock.
So this patch removes "dsia_mux" & "dsib_mux", and create
a new clock "plld_dsi" to represent the DSI clock enable
control.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Mark Zhang <markz@nvidia.com>
Tegra132 CAR supports almost the same clocks as Tegra124 CAR. This
patch mostly deals with the small differences.
Since Tegra132 contains many of the same PLL clock sources used on
Tegra114 and Tegra124, enable them in drivers/clk/tegra/clk-pll.c when
the kernel is configured to include Tegra132 support.
This patch is based on several patches from others:
1. a patch from Peter De Schrijver:
http://lkml.iu.edu/hypermail/linux/kernel/1407.1/06094.html
2. a patch from Bill Huang ("clk: tegra: enable cclk_g at boot on
Tegra132"), and
3. a patch from Allen Martin ("clk: Enable tegra clock driver for
tegra132").
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Paul Walmsley <pwalmsley@nvidia.com>
Cc: Peter De Schrijver <pdeschrijver@nvidia.com>
Cc: Allen Martin <amartin@nvidia.com>
Cc: Prashant Gaikwad <pgaikwad@nvidia.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Alexandre Courbot <gnurou@gmail.com>
Cc: Bill Huang <bilhuang@nvidia.com>
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>
tegra_clocks_apply_init_table() needs to be called after the udelay
loop has been calibrated (see commit
441f199a37 ("clk: tegra: defer
application of init table") for why that is). On existing Tegra SoCs
this was done by calling tegra_clocks_apply_init_table() from
tegra_dt_init(). To make this also work on ARM64, we need to change
this into an initcall. tegra_dt_init() is called from
customize_machine which is an arch_initcall. Therefore this should
also work on existing 32bit Tegra SoCs.
Tested on Tegra20 (ventana), Tegra30 (beaverboard), Tegra124 (jetson TK1) and
Tegra132.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
[paul@pwsan.com: tweaked the commit message]
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Paul Walmsley <pwalmsley@nvidia.com>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Prashant Gaikwad <pgaikwad@nvidia.com>
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Alexandre Courbot <gnurou@gmail.com>
As previously the names of the present clock and its parent were swapped.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Set the parent of the dsi lp clocks to pll_p and the rate
to 68MHz. The default parent is clk_m and rate is 12MHz, this
is too slow to receive data from the peripheral.
Per NVidia HW engineers, the optimal rate is 70MHz, but 68MHz
will suffice.
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Since the SDMMC controller registers are accessed via the APB,
the APB must be flushed before gating the SDMMC clocks to prevent
register accesses to the SDMMC controllers after their clocks are
gated.
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
The memory controller clock runs either at half or the same frequency as
the EMC clock.
Reviewed-By: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Don't abort clock initialization if we cannot match an entry in
tegra_clk_init_table to a valid entry in the clk array.
Also log a corresponding error message.
This was discovered when testing a patch that removed the EMC clock from
tegra124_clks but left a mention in tegra_clk_init_table.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
This merge window brings a good size of cleanups on various
platforms. Among the bigger ones:
* Removal of Samsung s5pc100 and s5p64xx platforms. Both of these have
lacked active support for quite a while, and after asking around nobody
showed interest in keeping them around. If needed, they could be
resurrected in the future but it's more likely that we would prefer
reintroduction of them as DT and multiplatform-enabled platforms
instead.
* OMAP4 controller code register define diet. They defined a lot of registers
that were never actually used, etc.
* Move of some of the Tegra platform code (PMC, APBIO, fuse, powergate)
to drivers/soc so it can be shared with 64-bit code. This also converts them
over to traditional driver models where possible.
* Removal of legacy gpio-samsung driver, since the last users have been
removed (moved to pinctrl)
Plus a bunch of smaller changes for various platforms that sort of
dissapear in the diffstat for the above. clps711x cleanups, shmobile
header file refactoring/moves for multiplatform friendliness, some misc
cleanups, etc.
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Merge tag 'cleanup-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC cleanups from Olof Johansson:
"This merge window brings a good size of cleanups on various platforms.
Among the bigger ones:
- Removal of Samsung s5pc100 and s5p64xx platforms. Both of these
have lacked active support for quite a while, and after asking
around nobody showed interest in keeping them around. If needed,
they could be resurrected in the future but it's more likely that
we would prefer reintroduction of them as DT and
multiplatform-enabled platforms instead.
- OMAP4 controller code register define diet. They defined a lot of
registers that were never actually used, etc.
- Move of some of the Tegra platform code (PMC, APBIO, fuse,
powergate) to drivers/soc so it can be shared with 64-bit code.
This also converts them over to traditional driver models where
possible.
- Removal of legacy gpio-samsung driver, since the last users have
been removed (moved to pinctrl)
Plus a bunch of smaller changes for various platforms that sort of
dissapear in the diffstat for the above. clps711x cleanups, shmobile
header file refactoring/moves for multiplatform friendliness, some
misc cleanups, etc"
* tag 'cleanup-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (117 commits)
drivers: CCI: Correct use of ! and &
video: clcd-versatile: Depend on ARM
video: fix up versatile CLCD helper move
MAINTAINERS: Add sdhci-st file to ARCH/STI architecture
ARM: EXYNOS: Fix build breakge with PM_SLEEP=n
MAINTAINERS: Remove Kirkwood
ARM: tegra: Convert PMC to a driver
soc/tegra: fuse: Set up in early initcall
ARM: tegra: Always lock the CPU reset vector
ARM: tegra: Setup CPU hotplug in a pure initcall
soc/tegra: Implement runtime check for Tegra SoCs
soc/tegra: fuse: fix dummy functions
soc/tegra: fuse: move APB DMA into Tegra20 fuse driver
soc/tegra: Add efuse and apbmisc bindings
soc/tegra: Add efuse driver for Tegra
ARM: tegra: move fuse exports to soc/tegra/fuse.h
ARM: tegra: export apb dma readl/writel
ARM: tegra: Use a function to get the chip ID
ARM: tegra: Sort includes alphabetically
ARM: tegra: Move includes to include/soc/tegra
...
This commit converts the PMC support code to a platform driver. Because
the boot process needs to call into this driver very early, also set up
a minimal environment via an early initcall.
Signed-off-by: Thierry Reding <treding@nvidia.com>
In order to not clutter the include/linux directory with SoC specific
headers, move the Tegra-specific headers out into a separate directory.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Use a sequence for enabling hardware control of the SATA PLL
that works both when using the SATA lane with SATA and when
using it with XUSB.
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
When writing a module for testing or debugging purposes, there is no way to
get hold of clk handles. This patch solves this by exposing all valid clocks
as clkdev's for the virtual device tegra-clk-debug.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Ensure some clocks critical for system operation are always. Also enable csite
for JTAG debugging and set the tsensor and soc_therm clock frequencies for the
upcoming soctherm driver.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
This adds two clocks, SATA and SATA_OOB, to the Tegra124 clock initialization
table. The clocks are needed for working SATA support.
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
This makes the SATA PLL be controlled by hardware instead of software.
This is required for working SATA support.
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
vi_sensor and vi_sensor2 have a wrong hw clkid on Tegra124. Fix this by
correcting the hw clkid for Tegra124 and creating the Tegra114 vi_sensor clock
from its own data. Tegra124 was also using the wrong internal clock id.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Initialize the XUSB-related clocks with appropriate parents and rates
for both Tegra114 and Tegra124.
Signed-off-by: Jim Lin <jilin@nvidia.com>
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Currently the Tegra1x4 clock init code hard-codes the mux setting
for xusb_hs_src and treats it as a fixed-factor clock. It is,
however, a mux which can be parented by either xusb_ss_src/2 or
pll_u_60M. Add the fixed-factor clock xusb_ss_div2 and put an
entry in periph_clks[] for the xusb_hs_src mux.
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The parent-to-index mapping for xusb_fs_src is incorrect.
Fix it by adding a mux table.
Signed-off-by: Jim Lin <jilin@nvidia.com>
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Enable hardware control of PLLE spread-spectrum, IDDQ, and enable
controls when enabling PLLE. The hardware (e.g. XUSB) using PLLE
will use these controls for power-saving optimizations.
Signed-off-by: Jim Lin <jilin@nvidia.com>
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The value written to PLLE_AUX was incorrect due to a wrong variable
being used. Without this fix SATA does not work.
Cc: stable@vger.kernel.org
Signed-off-by: Tuomas Tynkkynen <ttynkkynen@nvidia.com>
Tested-by: Mikko Perttunen <mperttunen@nvidia.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: improved changelog]
The Tegra124 clock driver currently provides 3 clocks that don't actually
exist; 2 for NAND and one for UART5/UARTE. Delete these.
Cc: <stable@vger.kernel.org>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
When enabling the PLLE as its final step, clk_plle_enable() would
accidentally OR in the value previously written to the PLLE_SS_CTRL
register.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Add div{m,n,p}_shift() and div{m,n,p}_mask_shifted() helpers to make the
code that modifies the m-, n- and p-divider fields of PLLs shorter and
easier to read.
Signed-off-by: Thierry Reding <treding@nvidia.com>
PLLE has M, N and P divider shift and width parameters that differ from
the defaults. Furthermore, when clearing the M, N and P divider fields
the corresponding masks were never shifted, thereby clearing only the
lowest bits of the register. This lead to a situation where the PLLE
programming would only work if the register hadn't been touched before.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
tegra_clk_periph_no_gate_ops is a local symbol.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Tegra124 does not have gr2d and gr3d clocks. They have been replaced by the
vic03 and gpu clocks respectively.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
When requesting a rate less than the minimum clock rate for a divider,
use the maximum divider value instead of bailing out with an error.
This matches the behavior of the generic clock divider.
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
When pll_x is the parent of cclk_lp, PLLX_DIV2_BYPASS_LP determines
whether cclk_lp output is divided by 2. Set TEGRA_DIVIDER_2 so that
the clk_super driver is aware of this.
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
The sdmmc clocks on Tegra114 and Tegra124 are 3-bit wide muxes with
6 parents. Add support for tegra_clk_sdmmc*_8 and switch Tegra114
and Tegra124 to use these clocks instead.
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
The host1x clock on Tegra124 is a 3-bit wide mux with 6 parents.
Change thte id to tegra_clk_host1x_8 so that the correct clock gets
registered.
Signed-off-by: Mark Zhang <markz@nvidia.com>
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Set correct pll_d2_out0 divider and correct the p div values for pll_d2.
Signed-off-by: David Ung <davidu@nvidia.com>
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
PLLD was using the same mnp table as PLLP. Fix it to use its own
table which is different from PLLP's.
Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
