Add tegra_chip_id TEGRA114 0x35
Signed-off-by: NHiroshi Doyu <hdoyu@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Conflicts:
	arch/arm/mach-tegra/platsmp.c

The "powered-down" cpuidle mode of Tegra20 needs the CPU0 be the last one
core to go into this mode before other core. The coupled cpuidle framework
can help to sync the MPCore to coupled state then go into "powered-down"
idle mode together. The driver can just assume the MPCore come into
"powered-down" mode at the same time. No need to take care if the CPU_0
goes into this mode along and only can put it into safe idle mode (WFI).

The powered-down state of Tegra20 requires power gating both CPU cores.
When the secondary CPU requests to enter powered-down state, it saves
its own contexts and then enters WFI for waiting CPU0 in the same state.
When the CPU0 requests powered-down state, it attempts to put the secondary
CPU into reset to prevent it from waking up. Then power down both CPUs
together and power off the cpu rail.

Be aware of that, you may see the legacy power state "LP2" in the code
which is exactly the same meaning of "CPU power down".

Based on the work by:
Colin Cross <ccross@android.com>
Gary King <gking@nvidia.com>
Signed-off-by: NJoseph Lo <josephl@nvidia.com>
Acked-by: NColin Cross <ccross@android.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

The flow controller can help CPU to go into suspend mode (powered-down
state). When CPU go into powered-down state, it needs some careful
settings before getting into and after leaving. The enter and exit
functions do that by configuring appropriate mode for flow controller.
Signed-off-by: NJoseph Lo <josephl@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Implementing suspend, resume and rail_off_ready API for tegra_cpu_car_ops. These
functions were used for CPU powered-down state maintenance.
Signed-off-by: NJoseph Lo <josephl@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

The powered-down state of Tegra20 requires power gating both CPU cores.
When the secondary CPU requests to enter powered-down state, it saves
its own contexts and then enters WFI. The Tegra20 had a limition to
power down both CPU cores. The secondary CPU must waits for CPU0 in
powered-down state too. If the secondary CPU be woken up before CPU0
entering powered-down state, then it needs to restore its CPU states
and waits for next chance.

Be aware of that, you may see the legacy power state "LP2" in the code
which is exactly the same meaning of "CPU power down".

Based on the work by:
Colin Cross <ccross@android.com>
Gary King <gking@nvidia.com>
Signed-off-by: NJoseph Lo <josephl@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

The "powered-down" CPU idle mode of Tegra cut off the vdd_cpu rail, it
include the power of GIC. That caused the SGI (Software Generated
Interrupt) been lost. Because the SGI can't wake up the CPU that in
the "powered-down" CPU idle mode. We need to check if there is any
pending SGI when go into "powered-down" CPU idle mode. This is important
especially when applying the coupled cpuidle framework into "power-down"
cpuidle dirver. Because the coupled cpuidle framework may have the
chance that misses IPI_SINGLE_FUNC handling sometimes.

For the PPI or SPI, something like the legacy peripheral interrupt. It
still can be maintained by Tegra legacy interrupt controller. If there
is any pending PPI or SPI when CPU in "powered-down" CPU idle mode. The
CPU can be woken up immediately. So we don't need to take care the same
situation for PPI or SPI.
Signed-off-by: NJoseph Lo <josephl@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Clock "emc" is for the External Memory Controller. The USB driver has no
business touching this clock directly. Remove the code that does so.
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

As Tegra PHY driver needs to access one of the host registers,
added few APIs.
Signed-off-by: NVenu Byravarasu <vbyravarasu@nvidia.com>
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
[swarren: moved assignment of phy->is_ulpi_phy to previous patch.]
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Tegra20 USB has 3 PHY instances:
Instance 1 and 3 are UTMI. Instance 2 is ULPI.

As instance number was used to differentiate ULPI from UTMI,
used DT param to get this info and processed accordingly.
Signed-off-by: NVenu Byravarasu <vbyravarasu@nvidia.com>
Acked-by: NFelipe Balbi <balbi@ti.com>
[swarren: moved assignment of phy->is_ulpi_phy into this patch out
of next patch.]
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Tegra20 USB has 3 PHY instances. Instance 0 is based on
legacy PHY interface and other two are standard interfaces.

As instance number was used to differentiate legacy from
standard interfaces, used DT param to get this info and
processed accordingly.
Signed-off-by: NVenu Byravarasu <vbyravarasu@nvidia.com>
Acked-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

The patch to add USB PHY nodes to device tree was written before Tegra
supported the clocks property in device tree. Now that it does, add the
required clocks properties to these nodes.

This will allow all clk_get_sys() calls in tegra_usb_phy.c to be replaced
by clk_get(phy->dev, clock_name), as part of converting the PHY driver to
a platform driver.
Acked-by: NVenu Byravarasu <vbyravarasu@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Add DT nodes for Tegra USB PHY along with related documentation.
Also added a phandle property to controller DT node, for referring
to connected PHY instance.
Signed-off-by: NVenu Byravarasu <vbyravarasu@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

As tegra_usb_phy_clk_disable/enable() are not being
used, removing them.
Signed-off-by: NVenu Byravarasu <vbyravarasu@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Tegra USB host driver is using port instance number,
to handle some of the hardware issues on SOC e.g. reset PORT0
twice etc. As instance number based handling looks ugly,
making use of information passed through DT for achieving this.
Signed-off-by: NVenu Byravarasu <vbyravarasu@nvidia.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

As Tegra USB host driver is using instance number for resetting
PORT0 twice, adding a new DT property for handling this.
Signed-off-by: NVenu Byravarasu <vbyravarasu@nvidia.com>
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Use kzalloc instead of kmalloc to allocate struct tegra_usb_phy.
This ensures that all function pointers in member u_phy are
initialized to NULL.
Signed-off-by: NVenu Byravarasu <vbyravarasu@nvidia.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

USB register base address and sizes defined in iomap.h
are not used in any files other than board-dt-tegra20.c.
Hence removed those defines from header file and using
the absolute values in board files.
Signed-off-by: NVenu Byravarasu <vbyravarasu@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

With device tree support added for Tegra clocks look up is done from
device tree, remove unused TEGRA_CLK_DUPLICATE()s.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
Acked-by: NMike Turquette <mturquette@linaro.org>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

With device tree support added for Tegra clocks look up is done from
device tree, remove unused TEGRA_CLK_DUPLICATE()s.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
Acked-by: NMike Turquette <mturquette@linaro.org>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Remove AUXDATA as clocks are initialized from device node.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Remove AUXDATA as clock are initialized from device node.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Configlink clock information is added to device tree. Get the clocks
using device node. Remove AUXDATA.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

As clock information is added to device tree clock can be looked up
using clk_get. Remove use of clk_get_sys.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: NMarc Dietrich <marvin24@gmx.de>
Acked-by: NJulian Andres Klode <jak@jak-linux.org>
[swarren: updated TODO file to remove entry that requested this change]
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Add clock i2c clock information to device node.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Add clock information to device nodes.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
[swarren: added second clock to 3d node]
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Add clock information to device nodes.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Since Tegra spi devices do not have multiple clocks, no need to use
clock name to get the clock.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Remove all legacy clock code from mach-tegra.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Migrate Tegra clock support to drivers/clk/tegra, this involves
moving:
1. definition of tegra_cpu_car_ops to clk.c
2. definition of reset functions to clk-peripheral.c
3. change parent of cpu clock.
4. Remove legacy clock initialization.
5. Initialize clocks using DT.
6. Remove all instance of mach/clk.h
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
[swarren: use to_clk_periph_gate().]
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Add Tegra30 clock support based on common clock framework.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
[swarren: ensure all OF lookups return valid cookies i.e. an explicit
error pointer or valid pointer not NULL, adapt to renames in earlier
patches, fixed some checkpatch issues.]
Acked-by: NMike Turquette <mturquette@linaro.org>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Add Tegra20 clock support based on common clock framework.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
[swarren: s/1GHz/100MHz/ in call to tegra_clk_plle() to fix PCIe,
implemented KBC clock, ensure all OF lookups return valid cookies i.e.
an explicit error pointer or valid pointer not NULL, adapt to renames
in earlier patches, fixed some checkpatch issues.]
Acked-by: NMike Turquette <mturquette@linaro.org>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Add Tegra specific clocks, pll, pll_out, peripheral, frac_divider, super.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
[swarren: alloc sizeof(*foo) not sizeof(struct foo), add comments re:
storing pointers to stack variables, make a timeout loop more idiomatic,
use _clk_pll_disable() not clk_disable_pll() from _program_pll() to
avoid redundant lock operations, unified tegra_clk_periph() and
tegra_clk_periph_nodiv(), unified tegra_clk_pll{,e}, rename all clock
registration functions so they don't have the same name as the clock
structs, return -EINVAL from clk_plle_enable when matching table rate
not found, pass ops to _tegra_clk_register_pll rather than a bool.]
Acked-by: NMike Turquette <mturquette@linaro.org>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

The device tree binding models Tegra30 CAR (Clock And Reset)
as a single monolithic clock provider.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
[swarren: fixed typo in binding doc]
Signed-off-by: NStephen Warren <swarren@nvidia.com>

The Tegra20 CAR (Clock And Reset) Controller controls most aspects of
most clocks within Tegra20. The device tree binding models this as a
single monolithic clock provider, which exports many clocks. This reduces
the number of nodes needed in device tree to represent these clocks.

This binding is only useful for Tegra20; the set of clocks that exists on
Tegra30 is sufficiently different to merit its own binding.
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NSimon Glass <sjg@chromium.org>
[pgaikwad: Added mux clk ids and sorted CAR node]
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

tegra_cpu_car_ops struct is going to be accessed from drivers/clk/tegra.
Move the tegra_cpu_car_ops to include/linux/clk/tegra.h.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

Add function to read chip id from APB MISC registers. This function
will also get called from clock driver to flush write operations on
apb bus.
Signed-off-by: NPrashant Gaikwad <pgaikwad@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

The "sleep.S" file has many functions that be shared by different module
currently. Not just for CPU idle driver. Make it build as default now.
Reported-by: NRhyland Klein <rklein@nvidia.com>
Signed-off-by: NJoseph Lo <josephl@nvidia.com>
[swarren: add sleep.o to separate line so each line only contains 1 file]
Signed-off-by: NStephen Warren <swarren@nvidia.com>

It would rather to use the API of time_to_jiffies than a constant number
of jiffies for the wait time of CPU power up.

Based on the work by:
Sang-Hun Lee <sanlee@nvidia.com>
Signed-off-by: NJoseph Lo <josephl@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

The reset handler code is used for either UP or SMP. To make Tegra device
can compile for UP. It needs to be moved to another file that is not SMP
only. This is because the reset handler also be needed by CPU idle
"powered-down" mode. So we also need to put the reset handler init function
in non-SMP only and init them always.

And currently the implementation of the reset handler to know which CPU is
OK to bring up was identital with "cpu_present_mask". But the
"cpu_present_mask" did not initialize yet when the reset handler init
function was moved to init early function. We use the "cpu_possible_mask"
to replace "cpu_present_mask". Then it can work on both UP and SMP case.
Signed-off-by: NJoseph Lo <josephl@nvidia.com>
[swarren: dropped the move of v7_invalidate_l1() from one file to another,
to avoid conflicts with Pavel's cleanup of this function, adjust Makefile
so each line only contains 1 file.]
Signed-off-by: NStephen Warren <swarren@nvidia.com>