The purpose of commit 0fd85869c2 ("spi/bcm63xx-hsspi: keep pll clk enabled")
was to keep the pll clk enabled through the lifetime of the device.
In order to do that, some 'clk_prepare_enable()'/'clk_disable_unprepare()'
calls have been added in the error handling path of the probe function, in
the remove function and in the suspend and resume functions.
However, a 'clk_disable_unprepare()' call has been unfortunately left in
the probe function. So the commit seems to be more or less a no-op.
Axe it now, so that the pll clk is left enabled through the lifetime of
the device, as described in the commit.
Fixes: 0fd85869c2 ("spi/bcm63xx-hsspi: keep pll clk enabled")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Jonas Gorski <jonas.gorski@gmail.com>
Link: https://lore.kernel.org/r/20200228213838.7124-1-christophe.jaillet@wanadoo.fr
Signed-off-by: Mark Brown <broonie@kernel.org>
For many places in the spi drivers, using the new `spi_transfer_delay`
helper is straightforward.
It's just replacing:
```
if (t->delay_usecs)
udelay(t->delay_usecs);
```
with `spi_transfer_delay(t)` which handles both `delay_usecs` and the new
`delay` field.
This change replaces in all places (in the spi drivers) where this change
is simple.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Link: https://lore.kernel.org/r/20190926105147.7839-10-alexandru.ardelean@analog.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Use devm_platform_ioremap_resource() to simplify the code a bit.
This is detected by coccinelle.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20190904135918.25352-8-yuehaibing@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
We don't need dev_err() messages when platform_get_irq() fails now that
platform_get_irq() prints an error message itself when something goes
wrong. Let's remove these prints with a simple semantic patch.
// <smpl>
@@
expression ret;
struct platform_device *E;
@@
ret =
(
platform_get_irq(E, ...)
|
platform_get_irq_byname(E, ...)
);
if ( \( ret < 0 \| ret <= 0 \) )
{
(
-if (ret != -EPROBE_DEFER)
-{ ...
-dev_err(...);
-... }
|
...
-dev_err(...);
)
...
}
// </smpl>
While we're here, remove braces on if statements that only have one
statement (manually).
Cc: Mark Brown <broonie@kernel.org>
Cc: linux-spi@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20190730181557.90391-42-swboyd@chromium.org
Signed-off-by: Mark Brown <broonie@kernel.org>
If the pll clock needs to be enabled to get its rate, it will also need
to be enabled to provide it. So ensure it is kept enabled through the
lifetime of the device.
Fixes: 0d7412ed1f ("spi/bcm63xx-hspi: Enable the clock before calling clk_get_rate().")
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Enable the clock prior to calling clk_get_rate(), because clk_get_rate()
should only be called if the clock is enabled.
Additionally, prepare/enable the pll_clk before calling clk_get_rate()
for the same reason.
Found by Linux Driver Verification project (linuxtesting.org).
Fixes: 142168eba9 ("spi: bcm63xx-hsspi: add bcm63xx HSSPI driver")
Signed-off-by: Stefan Potyra <Stefan.Potyra@elektrobit.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
platform_get_irq() returns an error code, but the spi-bcm63xx-hsspi
driver ignores it and always returns -ENXIO. This is not correct and,
prevents -EPROBE_DEFER from being propagated properly.
Notice that platform_get_irq() no longer returns 0 on error:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e330b9a6bb35dc7097a4f02cb1ae7b6f96df92af
Print and propagate the return value of platform_get_irq on failure.
This issue was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This patch fixes the checkpatch.pl warnings on the driver
file.
Signed-off-by: Aravind Thokala <aravind.thk@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The device table is required to load modules based on
modaliases. After adding MODULE_DEVICE_TABLE, below entries
for example will be added to module.alias:
alias: of:N*T*Cbrcm,bcm6328-hsspiC*
alias: of:N*T*Cbrcm,bcm6328-hsspi
Signed-off-by: Andres Galacho <andresgalacho@gmail.com>
Acked-by: Jonas Gorski <jonas.gorski@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add required binding support to probe through device tree.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The HSSPI block actually has two clock inputs, one for gating the block,
and one for the PLL rate. To allow these to be represented as two clocks,
add support for retrieving the rate from a separate "pll" clock, if the
"hsspi" clock does not provide one.
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add support for dual read/writes on spi-bcm63xx-hsspi. This has been
tested with a s25fl129p1 dual read capable spi flash, with a nice speed
improvement:
serial read:
root@OpenWrt:/# time dd if=/dev/mtd4 of=/dev/null bs=8192
2032+0 records in
2032+0 records out
real 0m 4.39s
user 0m 0.00s
sys 0m 1.55s
dual read:
root@OpenWrt:/# time dd if=/dev/mtd4 of=/dev/null bs=8192
2032+0 records in
2032+0 records out
real 0m 3.09s
user 0m 0.00s
sys 0m 1.56s
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Use SIMPLE_DEV_PM_OPS macro in order to make the code simpler.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Calling init_completion() once is enough.
For the rest of the iterations, call reinit_completion() instead.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Use the right CONFIG symbol to guard, properly (un)preprare clocks on
suspend/resume, and check the result of it.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
Ensure we notice if the clock cannot be enabled for any reason and pass
the error down.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
Use devm_clk_get() to make cleanup paths simpler.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
devm_request_and_ioremap() returns NULL on error, it doesn't return an
ERR_PTR(). This patch fixes it by switching to devm_ioremap_resource()
which is the prefered function anyway.
Fixes: 142168eba9 ('spi: bcm63xx-hsspi: add bcm63xx HSSPI driver')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
Add a driver for the High Speed SPI controller found on newer BCM63XX SoCs.
It does feature some new modes like 3-wire or dual spi, but neither of it
is currently implemented.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
Christophe JAILLET
Alexandru Ardelean
YueHaibing
Stephen Boyd
Jonas Gorski
Stefan Potyra
Mark Brown
Gustavo A. R. Silva
Aravind Thokala
Andres Galacho
Jonas Gorski
Wolfram Sang
Axel Lin
Mark Brown
Jingoo Han
Dan Carpenter