linux-toradex.git/drivers/mfd, branch v4.9.125

mfd: cros_ec: Fail early if we cannot identify the EC

2018-08-03T05:55:16+00:00

[ Upstream commit 0dbbf25561b29ffab5ba6277429760abdf49ceff ]

If we cannot communicate with the EC chip to detect the protocol version
and its features, it's very likely useless to continue. Else we will
commit all kind of uninformed mistakes (using the wrong protocol, the
wrong buffer size, mixing the EC with other chips).

Signed-off-by: Vincent Palatin 
Acked-by: Benson Leung 
Signed-off-by: Enric Balletbo i Serra 
Reviewed-by: Gwendal Grignou 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Lee Jones 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

mfd: intel-lpss: Program REMAP register in PIO mode

2018-07-03T09:23:14+00:00

commit d28b62520830b2d0bffa2d98e81afc9f5e537e8b upstream.

According to documentation REMAP register has to be programmed in
either DMA or PIO mode of the slice.

Move the DMA capability check below to let REMAP register be programmed
in PIO mode.

Cc: stable@vger.kernel.org # 4.3+
Fixes: 4b45efe85263 ("mfd: Add support for Intel Sunrisepoint LPSS devices")
Signed-off-by: Andy Shevchenko 
Signed-off-by: Lee Jones 
Signed-off-by: Greg Kroah-Hartman

mfd: palmas: Reset the POWERHOLD mux during power off

2018-03-24T10:00:16+00:00

[ Upstream commit 85fdaf8eb9bbec1f0f8a52fd5d85659d60738816 ]

POWERHOLD signal has higher priority  over the DEV_ON bit.
So power off will not happen if the POWERHOLD is held high.
Hence reset the MUX to GPIO_7 mode to release the POWERHOLD
and the DEV_ON bit to take effect to power off the PMIC.

PMIC Power off happens in dire situations like thermal shutdown
so irrespective of the POWERHOLD setting go ahead and turn off
the powerhold.  Currently poweroff is broken on boards that have
powerhold enabled. This fixes poweroff on those boards.

Signed-off-by: Keerthy 
Signed-off-by: Lee Jones 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

mfd: twl6040: Fix child-node lookup

2017-12-29T16:42:58+00:00

commit 85e9b13cbb130a3209f21bd7933933399c389ffe upstream.

Fix child-node lookup during probe, which ended up searching the whole
device tree depth-first starting at the parent rather than just matching
on its children.

To make things worse, the parent node was prematurely freed, while the
child node was leaked.

Note that the CONFIG_OF compile guard can be removed as
of_get_child_by_name() provides a !CONFIG_OF implementation which always
fails.

Fixes: 37e13cecaa14 ("mfd: Add support for Device Tree to twl6040")
Fixes: ca2cad6ae38e ("mfd: Fix twl6040 build failure")
Signed-off-by: Johan Hovold 
Acked-by: Peter Ujfalusi 
Signed-off-by: Lee Jones 
Signed-off-by: Greg Kroah-Hartman

mfd: twl4030-audio: Fix sibling-node lookup

2017-12-29T16:42:58+00:00

commit 0a423772de2f3d7b00899987884f62f63ae00dcb upstream.

A helper purported to look up a child node based on its name was using
the wrong of-helper and ended up prematurely freeing the parent of-node
while leaking any matching node.

To make things worse, any matching node would not even necessarily be a
child node as the whole device tree was searched depth-first starting at
the parent.

Fixes: 019a7e6b7b31 ("mfd: twl4030-audio: Add DT support")
Signed-off-by: Johan Hovold 
Acked-by: Peter Ujfalusi 
Signed-off-by: Lee Jones 
Signed-off-by: Greg Kroah-Hartman

mfd: cros ec: spi: Don't send first message too soon

2017-12-29T16:42:58+00:00

commit 15d8374874ded0bec37ef27f8301a6d54032c0e5 upstream.

On the Tegra124 Nyan-Big chromebook the very first SPI message sent to
the EC is failing.

The Tegra SPI driver configures the SPI chip-selects to be active-high
by default (and always has for many years). The EC SPI requires an
active-low chip-select and so the Tegra chip-select is reconfigured to
be active-low when the EC SPI driver calls spi_setup(). The problem is
that if the first SPI message to the EC is sent too soon after
reconfiguring the SPI chip-select, it fails.

The EC SPI driver prevents back-to-back SPI messages being sent too
soon by keeping track of the time the last transfer was sent via the
variable 'last_transfer_ns'. To prevent the very first transfer being
sent too soon, initialise the 'last_transfer_ns' variable after calling
spi_setup() and before sending the first SPI message.

Signed-off-by: Jon Hunter 
Reviewed-by: Brian Norris 
Reviewed-by: Douglas Anderson 
Acked-by: Benson Leung 
Signed-off-by: Lee Jones 
Signed-off-by: Greg Kroah-Hartman

mfd: fsl-imx25: Clean up irq settings during removal

2017-12-20T09:07:15+00:00

commit 18f77393796848e68909e65d692c1d1436f06e06 upstream.

When fsl-imx25-tsadc is compiled as a module, loading, unloading and
reloading the module will lead to a crash.

Unable to handle kernel paging request at virtual address bf005430
[] (irq_find_matching_fwspec)
   from [] (of_irq_get+0x58/0x74)
[] (of_irq_get)
   from [] (platform_get_irq+0x48/0xc8)
[] (platform_get_irq)
   from [] (mx25_tsadc_probe+0x220/0x2f4 [fsl_imx25_tsadc])

irq_find_matching_fwspec() loops over all registered irq domains. The
irq domain is still registered from last time the module was loaded but
the pointer to its operations is invalid after the module was unloaded.

Add a removal function which clears the irq handler and removes the irq
domain. With this cleanup in place, it's possible to unload and reload
the module.

Signed-off-by: Martin Kaiser 
Reviewed-by: Lucas Stach 
Signed-off-by: Lee Jones 
Signed-off-by: Greg Kroah-Hartman

mfd: twl4030-power: Fix pmic for boards that need vmmc1 on reboot

2017-12-05T10:24:32+00:00

commit ad48ed0c5763dc08931407e455dff5acdbe96e81 upstream.

At least two different omap3630/3730 boards booting from MMC1
fail to reboot if the "ti,twl4030-power-idle-osc-off" or
"ti,twl4030-power-idle" compatible flags are set.  This patch will
keep the vmmc1 powered up during reboot allowing the bootloader
to load.

Signed-off-by: Adam Ford 
Signed-off-by: Lee Jones 
Signed-off-by: Greg Kroah-Hartman

mfd: axp20x: Fix axp288 PEK_DBR and PEK_DBF irqs being swapped

2017-11-08T09:08:33+00:00

[ Upstream commit 1af468ebe45591651ec3bafc2e9ddc6fdef70ae0 ]

The R in PEK_DBR stands for rising, so it should be mapped to
AXP288_IRQ_POKP where the last P stands for positive edge.

Likewise PEK_DBF should be mapped to the falling edge, aka the
_N_egative edge, so it should be mapped to AXP288_IRQ_POKN.

This fixes the inverted powerbutton status reporting by the
axp20x-pek driver.

Signed-off-by: Hans de Goede 
Acked-by: Chen-Yu Tsai 
Signed-off-by: Lee Jones 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman

mfd: ab8500-sysctrl: Handle probe deferral

2017-11-08T09:08:33+00:00

[ Upstream commit 7e9c40c63933a643908d686bd89dfc2315e8c70a ]

In the current boot, clients making use of the AB8500 sysctrl
may be probed before the ab8500-sysctrl driver. This gives them
-EINVAL, but should rather give -EPROBE_DEFER.

Before this, the abx500 clock driver didn't probe properly,
and as a result the codec driver in turn using the clocks did
not probe properly. After this patch, everything probes
properly.

Also add OF compatible-string probing. This driver is all
device tree, so let's just make a drive-by-fix of that as
well.

Signed-off-by: Linus Walleij 
Signed-off-by: Lee Jones 
Signed-off-by: Sasha Levin 
Signed-off-by: Greg Kroah-Hartman