Commit Graph

874 Commits

Author SHA1 Message Date
Yong Zhang
38ada214fa spi: irq: Remove IRQF_DISABLED
Since commit [e58aa3d2: genirq: Run irq handlers with interrupts disabled],
We run all interrupt handlers with interrupts disabled
and we even check and yell when an interrupt handler
returns with interrupts enabled (see commit [b738a50a:
genirq: Warn when handler enables interrupts]).

So now this flag is a NOOP and can be removed.

Signed-off-by: Yong Zhang <yong.zhang0@gmail.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-10-24 14:14:40 +02:00
Shubhrajyoti D
1458d160de OMAP: SPI: Fix the trying to free nonexistent resource error
Currently there is a request_mem_region(r->start, ..
followed by r->start += pdata->regs_offset;

And then in remove

   r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
   release_mem_region(r->start, resource_size(r));

Here the offset addition is not taken care. Fix the code for the
same.

Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-10-24 13:44:30 +02:00
Grant Likely
a853ba8d6d Merge commit 'v3.1' into spi/next 2011-10-24 13:42:08 +02:00
Mika Westerberg
5bdb761341 spi/spi-ep93xx: add module.h include
Due to module.h cleanup it is not anymore included implicitly. Drivers
who want to use it need to include it explicitly.

Signed-off-by: Mika Westerberg <mika.westerberg@iki.fi>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-10-16 02:04:18 -06:00
Marc Dietrich
5b7bea9f12 spi/tegra: fix compilation error in spi-tegra.c
Add #include <linux/module.h> to spi-tegra.c to fix a compilation error
after the removal of module.h from device.h (in patch: "include: replace
linux/module.h with "struct module" wherever possible").

Signed-off-by: Marc Dietrich <marvin24@gmx.de>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-10-14 16:41:04 -06:00
Tomoya MORINAGA
f3e03e2eb0 spi-topcliff-pch: Fix overrun issue
We found that adding load, Rx data sometimes drops.(with DMA transfer mode)
The cause is that before starting Rx-DMA processing, Tx-DMA processing starts.
This causes FIFO overrun occurs.

This patch fixes the issue by modifying FIFO tx-threshold and DMA descriptor
size like below.

                      Current                   this patch
Rx-descriptor   4Byte+12Byte*341    -->    12Byte*340-4Byte-12Byte
Rx-threshold                   (Not modified)
Tx-descriptor   4Byte+12Byte*341    -->    16Byte-12Byte*340
Rx-threshold    12Byte              -->    2Byte

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-10-04 10:10:50 -06:00
Tomoya MORINAGA
25e803f9c3 spi-topcliff-pch: Add recovery processing in case FIFO overrun error occurs
Add recovery processing in case FIFO overrun error occurs with DMA transfer mode.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-10-04 10:10:50 -06:00
Tomoya MORINAGA
373b0eb64b spi-topcliff-pch: Fix CPU read complete condition issue
We found Rx data sometimes drops.(with non-DMA transfer mode)
The cause is read complete condition is not true.

This patch fixes the issue.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-10-04 10:10:50 -06:00
Tomoya MORINAGA
8b7aa961a8 spi-topcliff-pch: Fix SSN Control issue
During processing 1 command/data series,
SSN should keep LOW.
However, currently, SSN becomes HIGH.
This patch fixes the issue.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-10-04 10:10:50 -06:00
Tomoya MORINAGA
27504be5c1 spi-topcliff-pch: add tx-memory clear after complete transmitting
Currently, in case of reading date from SPI flash,
command is sent twice.
The cause is that tx-memory clear processing is missing .
This patch adds the tx-momory clear processing.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-10-04 10:10:50 -06:00
Jeff Harris
387719c2ec spi: Fix WARN when removing spi-fsl-spi module
If CPM mode is not used, the fsl_dummy_rx variable is never allocated.  When
the cleanup attempts to free it, the reference count is zero and a WARN is
generated.  The same CPM mode check used in the initialize is applied to the
free as well.

Tested on 2.6.33 with the previous spi_mpc8xxx driver.  The renamed
spi-fsl-spi driver looks to have the same problem.

Signed-off-by: Jeff Harris <jeff_harris@kentrox.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-09-23 17:28:29 -06:00
H Hartley Sweeten
7eb187b3cd spi: spi-dw: fix all sparse warnings
The dw_{read,write}[lw] macros produce sparse warnings everytime they
are used.  The "read" ones cause:

warning: cast removes address space of expression
warning: incorrect type in argument 1 (different address spaces)
   expected void const volatile [noderef] <asn:2>*addr
   got unsigned int *<noident>

And the "write" ones:

warning: cast removes address space of expression
warning: incorrect type in argument 2 (different address spaces)
   expected void volatile [noderef] <asn:2>*addr
   got unsigned int *<noident>

Fix this by removing struct dw_spi_reg and converting all the register
offsets to #defines. Then convert the macros into inlined functions so
that proper type checking can occur.

While here, also fix the three sparse warnings in spi-dw-mid.c due to
the return value of ioremap_nocache being stored in a u32 * not a
void __iomem *.

With these changes the spi-dw* files all build with no sparse warnings.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-09-21 09:41:48 -06:00
Viresh Kumar
3e3ea71627 spi/spi-pl022: Call pl022_dma_remove(pl022) only if enable_dma is true
pl022_dma_remove() should be called only if enable_dma is true. There is no
point calling it when pl022_dma_probe() is not called, which again depends on
enable_dma.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-09-21 09:41:48 -06:00
Viresh Kumar
0379b2a33a spi/spi-pl022: calculate_effective_freq() must set rate <= requested rate
There were few issues with calculate_effective_freq() routine:
- It was returning first rate found >= requested rate. Now, if system have spi's
  rate as 83 MHz, with possible prescaled rates as 83, 41.5, 20.75, 13.83 (as we
  can prescale with multiples of 2). If user has given rate to be programmed as
  22 MHz, then driver programmes it to 41.5 MHz. This looks to be incorrect, as
  user might have given the upper limit of the device, and we are programming it
  above it.
- Driver finds the first satisfying rate and programmes it, but with other
  values of scr & cpsdvsr, it is possible to get more closer rate.

This patch fixes these two issues, with some reformatting inside the code.  This
also creates a inline routine to calculate prescaled rate based on spi's rate,
cpsdvsr and scr.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-09-21 09:41:47 -06:00
Viresh Kumar
b181565ee6 spi/spi-pl022: Don't allocate more sg than required.
In routine configure_dma(), if transfer->len = PAGE_SIZE, then pages is one more
than required. While leads to one more sg getting allocated.

This is wrong. Correct this to allocate correct number of sg.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-09-21 09:41:47 -06:00
Viresh Kumar
538a18dc18 spi/spi-pl022: Use GFP_ATOMIC for allocation from tasklet
tasklets don't allow invocation to sleeping routines. In configure_dma()
routine, sg_alloc_table() was called with GFP_KERNEL flag and so this causes
crash when called from tasklet.

Replace GFP_KERNEL with GFP_ATOMIC to get this fixed.

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-09-21 09:41:47 -06:00
Viresh Kumar
f1e45f86ed spi/spi-pl022: Resolve formatting issues
There were few formatting related issues in code. This patch fixes them.
Fixes include:
- Remove extra blank lines
- align code to 80 cols
- combine several lines to one line
- Replace multiple spaces with tabs
- Remove spaces before labels

Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-09-20 11:22:59 -06:00
Fabio Estevam
4cc122ac91 spi/imx: Fix spi-imx when the hardware SPI chipselects are used
commit 22a85e4cd5 (spi/imx: add device tree probe support) broke spi-imx usage
when the SPI chipselect is the one internal to the controller.

On a mx31pdk board the following error is seen:

Registering mxc_nand as whole device
------------[ cut here ]------------
WARNING: at drivers/gpio/gpiolib.c:101 gpio_ensure_requested+0x4c/0xf4()
autorequest GPIO-0
Modules linked in:
[<c0014410>] (unwind_backtrace+0x0/0xf4) from [<c0025754>] (warn_slowpath_common+0x4c/0x64)
[<c0025754>] (warn_slowpath_common+0x4c/0x64) from [<c0025800>] (warn_slowpath_fmt+0x30/0x40)
[<c0025800>] (warn_slowpath_fmt+0x30/0x40) from [<c0198688>] (gpio_ensure_requested+0x4c/0xf4)
[<c0198688>] (gpio_ensure_requested+0x4c/0xf4) from [<c01988c8>] (gpio_direction_output+0xa0/0x138)
[<c01988c8>] (gpio_direction_output+0xa0/0x138) from [<c01ed198>] (spi_imx_setup+0x38/0x4c)
[<c01ed198>] (spi_imx_setup+0x38/0x4c) from [<c01eb5d0>] (spi_setup+0x38/0x50)
[<c01eb5d0>] (spi_setup+0x38/0x50) from [<c01eb85c>] (spi_add_device+0x94/0x124)
[<c01eb85c>] (spi_add_device+0x94/0x124) from [<c01eb960>] (spi_new_device+0x74/0xac)
[<c01eb960>] (spi_new_device+0x74/0xac) from [<c01eb9b8>] (spi_match_master_to_boardinfo+0x20/0x40)
[<c01eb9b8>] (spi_match_master_to_boardinfo+0x20/0x40) from [<c01eba88>] (spi_register_master+0xb0/0x104)
[<c01eba88>] (spi_register_master+0xb0/0x104) from [<c01ec0b4>] (spi_bitbang_start+0x104/0x17c)
[<c01ec0b4>] (spi_bitbang_start+0x104/0x17c) from [<c02c2c4c>] (spi_imx_probe+0x2fc/0x404)
[<c02c2c4c>] (spi_imx_probe+0x2fc/0x404) from [<c01c2498>] (platform_drv_probe+0x18/0x1c)
[<c01c2498>] (platform_drv_probe+0x18/0x1c) from [<c01c1058>] (driver_probe_device+0x78/0x174)
[<c01c1058>] (driver_probe_device+0x78/0x174) from [<c01c11e0>] (__driver_attach+0x8c/0x90)
[<c01c11e0>] (__driver_attach+0x8c/0x90) from [<c01c0860>] (bus_for_each_dev+0x60/0x8c)
[<c01c0860>] (bus_for_each_dev+0x60/0x8c) from [<c01c0088>] (bus_add_driver+0xa0/0x288)
[<c01c0088>] (bus_add_driver+0xa0/0x288) from [<c01c179c>] (driver_register+0x78/0x18c)
[<c01c179c>] (driver_register+0x78/0x18c) from [<c0008490>] (do_one_initcall+0x34/0x178)
[<c0008490>] (do_one_initcall+0x34/0x178) from [<c03a5204>] (kernel_init+0x74/0x118)
[<c03a5204>] (kernel_init+0x74/0x118) from [<c000f65c>] (kernel_thread_exit+0x0/0x8)
---[ end trace 759f924b30fd5a44 ]---

Fix this issue by using the original chip select logic and make spi-imx to work again.

Tested on a mx31pdk that uses the hardware SPI chipselect pins and also
on a mx27pdk that uses GPIO as SPI chipselect.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-09-15 15:54:38 -06:00
Linus Walleij
50658b6602 spi/pl022: remove function cannot exit
The remove function in the PL022 driver cannot abort the remove
function any way, so restructure the code so as not to make that
assumption. Remove will now proceed no matter whether it can
stop the transfer queue or not.

Reported-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-08-02 14:54:11 +01:00
Linus Torvalds
7235dd74a4 Merge branch 'spi/next' of git://git.secretlab.ca/git/linux-2.6
* 'spi/next' of git://git.secretlab.ca/git/linux-2.6: (34 commits)
  spi/imx: add device tree probe support
  spi/imx: copy gpio number passed by platform data into driver private data
  spi/imx: use soc name in spi device type naming scheme
  spi/imx: merge type SPI_IMX_VER_0_7 into SPI_IMX_VER_0_4
  spi/imx: do not use spi_imx2_3 to name SPI_IMX_VER_2_3 function and macro
  spi/imx: use mx21 to name SPI_IMX_VER_0_0 function and macro
  spi/imx: do not make copy of spi_imx_devtype_data
  spi/dw: Add spi number into spi irq desc
  spi/tegra: Use engineering names in DT compatible property
  spi/fsl_spi: fix CPM spi driver
  mach-s3c2410: remove unused spi-gpio.h file
  spi: remove obsolete spi-s3c24xx-gpio driver
  mach-gta2: remove unused spi-gpio.h include
  mach-qt2410: convert to spi_gpio
  mach-jive: convert to spi_gpio
  spi/pxa2xx: Remove unavailable ssp_type from documentation
  spi/bfin_spi: uninline fat queue funcs
  spi/bfin_spi: constify pin array
  spi/bfin_spi: use structs for accessing hardware regs
  spi/topcliff-pch: Support new device ML7223 IOH
  ...

Fix up trivial conflict in arch/arm/mach-ep93xx/Makefile
2011-07-22 14:52:44 -07:00
Shawn Guo
22a85e4cd5 spi/imx: add device tree probe support
It adds device tree probe support for spi-imx driver.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-14 13:47:18 -06:00
Shawn Guo
c2387cb9e5 spi/imx: copy gpio number passed by platform data into driver private data
It copies gpio number passed via platform data embedded pointer into
driver private data, so that we do not need to refer to this embedded
pointer passed by platform data after probe function exits.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-14 13:47:13 -06:00
Shawn Guo
04ee585495 spi/imx: use soc name in spi device type naming scheme
Software defined version number is not stable enough to be used
in device type naming scheme.  The patch changes it to use implicit
soc name for spi device type definition.  In this way, we can easily
align the naming scheme with device tree binding, which comes later.

It removes fifosize from spi_imx_data and adds devtype there, so that
fifosize can be set in an inline function according to devtype.
Also, cpu_is_mx can be replaced by inline functions checking devtype.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-14 13:47:02 -06:00
Shawn Guo
2a64a90a2c spi/imx: merge type SPI_IMX_VER_0_7 into SPI_IMX_VER_0_4
The only difference between SPI_IMX_VER_0_7 and SPI_IMX_VER_0_4 is
.config function.  The patch uses cpu_is_mx35 (to be removed) as the
temporary solution to consolidate functions spi_imx0_4_config and
spi_imx0_7_config into mx31_config.  As a result, type SPI_IMX_VER_0_7
can be merged into SPI_IMX_VER_0_4.

It also renames function spi_imx0_4_reset to mx31_reset to keep
consistency with other function naming.

A couple of redundant macros, MX3_CSPISTAT and MX3_CSPISTAT_RR,
together with the useless type SPI_IMX_VER_0_5 also get cleaned up.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-14 13:46:47 -06:00
Shawn Guo
66de757c58 spi/imx: do not use spi_imx2_3 to name SPI_IMX_VER_2_3 function and macro
It's confusing to use spi_imx2_3 to name SPI_IMX_VER_2_3 function
and macro, as it easily make people think of imx2 and imx3.  It's
better to use specific soc name just like what other SPI_IMX_VER
do.  For SPI_IMX_VER_2_3 case, it will be mx51.  To distinguish it
from CSPI on mx51, mx51_ecspi might be a good choice.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-14 13:46:10 -06:00
Shawn Guo
3451fb1563 spi/imx: use mx21 to name SPI_IMX_VER_0_0 function and macro
SPI_IMX_VER_0_0 covers i.mx21 and i.mx27.  It makes more sense to
use mx21 rather than mx27 to name SPI_IMX_VER_0_0 function and
macro, since i.mx21 comes out ealier than i.mx27.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-14 13:27:54 -06:00
Shawn Guo
edd501bbf1 spi/imx: do not make copy of spi_imx_devtype_data
spi_imx_devtype_data has already been driver private data.  There is
really no need to make a copy in spi_imx_data.  Instead, a reference
pointer works perfectly fine.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-14 13:19:41 -06:00
Liu, ShuoX
40bfff85ff spi/dw: Add spi number into spi irq desc
Signed-off-by: ShuoX Liu <shuox.liu@intel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-08 13:09:00 -06:00
Padmavathi Venna
3075741417 spi/s3c64xx: Bug fix for SPI with different FIFO level
The existing macro fails for following scenarios.
1) S5P64X0 channel 1
2) S5PV210 channel 1

The FIFO data level supported in the above SoCs either 64 or
256 bytes depending on the channel. Because of this the TX_DONE
is the 25 bit in the status register.

The existing macro works for the following scenarios
1) S3C6410 all channels
2) S5PC100 all channels

The FIFO data level supported in the above SoCs 64 bytes
on all the channels. Because of this the TX_DONE is the 21 bit
in the status register.

So when we use the existing macro for the non-working SoCs
it is not anding with the TX_DONE bit for transmission status check.

Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2011-07-06 15:03:08 +09:00
Stephen Warren
22032c7774 spi/tegra: Use engineering names in DT compatible property
Engineering names are more stable than marketing names. Hence, use them
for Device Tree compatible properties instead.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-05 23:38:30 -06:00
Holger Brunck
fb6440955f spi/fsl_spi: fix CPM spi driver
This patch fixes the freescale spi driver for CPM. Without this
patch SPI on CPM failed because cpm_muram_alloc_fixed tries to
allocate muram in an preserved area. The error reported was:

mpc8xxx_spi f0011a80.spi: can't allocate spi parameter ram
mpc8xxx_spi: probe of f0011a80.spi failed with error -12

Now the driver uses of_iomap to get access to this area
similar to i2c driver driver in the i2c-cpm.c which has a
similar device tree node. This is tested on a MPC8247 with CPM2.

Signed-off-by: Holger Brunck <holger.brunck@keymile.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-05 11:59:17 -06:00
Peter Korsgaard
45fae7def6 spi: remove obsolete spi-s3c24xx-gpio driver
It was equivalent to spi-gpio, and there's no longer any in-tree users
of it, so get rid of it.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-07-04 10:52:58 -06:00
Mike Frysinger
c52d4e5f3c spi/bfin_spi: uninline fat queue funcs
There's no need for these queue funcs to be inlined, so drop the
markings.  This shaves off a few hundred duplicated bytes.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-17 08:35:58 -06:00
Mike Frysinger
ddc0bf13d6 spi/bfin_spi: constify pin array
This array isn't written anywhere, so constify it.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-17 08:35:57 -06:00
Mike Frysinger
47885ce81c spi/bfin_spi: use structs for accessing hardware regs
Rather than hardcoding the register sizes/offsets in this file, use the
existing struct in the spi header for reading/writing the hardware.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-17 08:35:55 -06:00
Grant Likely
f8db4cc4f2 Merge branch 'spi/merge' into spi/next 2011-06-17 08:32:26 -06:00
Mike Frysinger
e479c60456 spi/bfin_spi: fix handling of default bits per word setting
The default bits per word setting should be 8 bits, but since most of our
devices have been explicitly setting this up, we didn't notice when the
default stopped working.

At the moment, any default transfers without an explicit bit size setting
error out with:
bfin-spi bfin-spi.0: transfer: unsupported bits_per_word

So in the transfer logic, have a bits_per_word setting of 0 fall into the
8 bit transfer logic.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-17 08:27:27 -06:00
Tomoya MORINAGA
2e2de2e314 spi/topcliff-pch: Support new device ML7223 IOH
Support new device OKI SEMICONDUCTOR ML7223 IOH(Input/Output Hub).
The ML7223 IOH is for MP(Media Phone) use.
The ML7223 is companion chip for Intel Atom E6xx series.
The ML7223 is completely compatible for Intel EG20T PCH.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-16 18:49:23 -06:00
Linus Walleij
78b2b911bf spi/pl022: strengthen FIFO watermark level checks
The platform configuration can select custom FIFO watermarks, but
these may conflict the actual FIFO size of the PL022 variant if
set too high. So strengthen the sanity checks to deny any
conflicting settings.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-16 08:27:05 -06:00
Rabin Vincent
bcda6ff8dd spi/pl022: support runtime PM
Insert notifiers for the runtime PM API. With this the runtime
PM layer kicks in to action where used.

Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Reviewed-by: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Reviewed-by: Jonas Aberg <jonas.aberg@stericsson.com>
Reviewed-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
[Rebased to Linux 3.0-rc3, edit description]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-16 08:27:00 -06:00
Linus Walleij
083be3f053 spi/pl022: initialize burstsize from FIFO trigger level
Configure the DMA burstsize from the FIFO trigger level supplied
with the controller configuration data. This is based on a patch
from Virupax, but I rewrote it differently.

Reported-by: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-16 08:26:58 -06:00
Grant Likely
e892bac102 gpio/tegra: Move Tegra gpio driver to drivers/gpio
As part of the gpio driver consolidation, this patch moves the Tegra driver
into drivers/gpio

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-15 12:59:20 -06:00
Virupax Sadashivpetimath
e3f88ae996 spi-pl022: Add missing return value update
Return error on out of range cpsdvsr value.

Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-13 09:18:45 -06:00
Joe Perches
8e2943c04c spi: Convert uses of struct resource * to resource_size(ptr)
Done via coccinelle scripts like:

@@
struct resource *ptr;
@@

- ptr->end - ptr->start + 1
+ resource_size(ptr)

and some grep and typing.

Mostly uncompiled, no cross-compilers.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-10 23:43:41 -06:00
Grant Likely
e4c8308c85 Merge branch 'ep93xx-dma' into spi/next 2011-06-09 12:42:57 -06:00
Tomoya MORINAGA
c37f3c2749 spi/topcliff_pch: DMA support
This patch enables this SPI driver works with DMA mode.

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-08 16:53:50 -06:00
Tomoya MORINAGA
f016aeb655 spi/topcliff_pch: support new device ML7213 IOH
Support ML7213 device of OKI SEMICONDUCTOR.
ML7213 is companion chip of Intel Atom E6xx series for IVI(In-Vehicle Infotainment).
ML7213 is compatible for Intel EG20T PCH.

v4: - Delete unrelated whitespace
    - Prevent device driver from accessing platform data
    - Add __devinit and __devexit
    - Save pdev->dev to pd_dev->dev.parent
    - Have own suspend/resume processing in platform_driver.
    - Care returned value in pch_spi_init
    - Change unregister order

Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-08 16:53:48 -06:00
Mika Westerberg
626a96db11 spi/ep93xx: add DMA support
This patch adds DMA support for the EP93xx SPI driver. By default the DMA is
not enabled but it can be enabled by setting ep93xx_spi_info.use_dma to true
in board configuration file.

Note that the SPI driver still uses PIO for small transfers (<= 8 bytes) for
performance reasons.

Signed-off-by: Mika Westerberg <mika.westerberg@iki.fi>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-08 15:46:12 -06:00
Grant Likely
ca632f5566 spi: reorganize drivers
Sort the SPI makefile and enforce the naming convention spi_*.c for
spi drivers.

This change also rolls the contents of atmel_spi.h into the .c file
since there is only one user of that particular include file.

v2: - Use 'spi-' prefix instead of 'spi_' to match what seems to be
      be the predominant pattern for subsystem prefixes.
    - Clean up filenames in Kconfig and header comment blocks

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
2011-06-06 01:16:30 -06:00
Anatolij Gustschin
8c99268431 spi/bitbang: initialize bits_per_word as specified by spi message
SPI protocol drivers can submit messages specifying needed bits_per_word
parameter for a message transfer. The bitbang driver currently ignores
bits_per_word given by a singe message and always uses master's
bits_per_word parameter. Only use master's bits_per_word when a
message didn't specify needed bits_per_word for ongoing transfer.

Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-06-03 15:01:14 -06:00