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Fixed coverity and compiler warning in drivers/spi/u8500_spi.c.
Also removed a variable which is no longer needed after the
GPIO-handling was removed from the driver.
ST-Ericsson ID: None
ST-Ericsson FOSS-OUT ID: Trivial
Change-Id: Iea067014c2c2ea4bd4367eccbe1cde36c69e01da
Signed-off-by: Markus Helgesson <markus.helgesson@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/13763
Reviewed-by: Michael BRANDT <michael.brandt@stericsson.com>
Reviewed-by: QATOOLS
Reviewed-by: Joakim AXELSSON <joakim.axelsson@stericsson.com>
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Copied the GPIO configurator written for the Linux kernel.
The Nomadik db8500 GPIO driver. Purpose is to be able
to just cut-n-paste the GPIO config from Linux to U-boot.
Also at the same time remove the obsolete and old
gpio_alt_funcenable/disable methods.
Now all is configured using a table in u8500.c.
Now drivers doesn't have to worry about setting up the GPIO pins.
Actually no driver today uses GPIO pins directly, only via
hardware blocks within db8500. Functions are still added
to be able to interact directly with a GPIO pin. This also
cleaned up a lot of driver by not having to bit manipulate GPIO
registers them self.
The new driver is called db8500_gpio and placed in driver/gpio/.
Functions are in include/db8500_gpio.h:
void db8500_gpio_set_pull(unsigned gpio, enum db8500_gpio_pull pull);
void db8500_gpio_make_input(unsigned gpio);
int db8500_gpio_get_input(unsigned gpio);
void db8500_gpio_make_output(unsigned gpio, int val);
void db8500_gpio_set_output(unsigned gpio, int val);
And for the configurator in include/db8500_pincfg.h:
void db8500_gpio_config_pins(pin_cfg_t *cfgs, size_t num);
All in all the final binary size has decreased.
This is only done for db8500 nomadik GPIO. The code for gpio
expanders has not been touched.
All references to Nomadik has been removed in this driver.
Only db8500 is left.
ST-Ericsson ID: None
Signed-off-by: Joakim Axelsson <joakim.axelsson@stericsson.com>
Change-Id: I90aa1d46c813ffb5a777c3492b5751f5054f71cf
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/9904
Reviewed-by: QATOOLS
Reviewed-by: Michael BRANDT <michael.brandt@stericsson.com>
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Moved clock code from board/st/u8500/u8500.c to
cpu/arm_cortexa9/db8500/clock.c.
Remove code to simulate Maja clocks.
ST-Ericsson ID: None
Signed-off-by: Joakim Axelsson <joakim.axelsson@stericsson.com>
Change-Id: Ibbb21d53091ceaddcc01e1a195e129039f986696
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/7114
Reviewed-by: QATOOLS
Reviewed-by: Michael BRANDT <michael.brandt@stericsson.com>
Tested-by: Michael BRANDT <michael.brandt@stericsson.com>
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Added SPI support for U8500
ST-Ericsson ID: 269867
ST-Ericsson FOSS-OUT ID: STETL-FOSS-OUT-10121
Change-Id: Ied17dd39aa1ebc0ee95818c59c7f211ce655b8bf
Signed-off-by: Markus Helgesson <markus.helgesson@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/7569
Reviewed-by: Michael BRANDT <michael.brandt@stericsson.com>
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The only missing chipselect line support is CS2, and I need it on
CS2...
Signed-off-by: Remy Bohmer <linux@bohmer.net>
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Unify both MCF5227x and MCF5445x DSPI driver in CPU to
driver/spi folder for common use.
Signed-off-by: TsiChung Liew <tsicliew@gmail.com>
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Conflicts:
drivers/spi/Makefile
Signed-off-by: Wolfgang Denk <wd@denx.de>
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This patch adds a SPI driver for the Marvell Kirkwood SoC's.
Signed-off-by: Prafulla Wadaskar <prafulla@marvell.com>
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Signed-off-by: Grzegorz Bernacki <gjb@semihalf.com>
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CS4 on SPI0 has a dedicated PH8 pin which needs to be enabled as a
peripheral in order to work.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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calculate dynamically the clock rate and pllb setting for usb
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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Blackfin SPI driver was not driving the SPI chip-select high before
putting the chip-select signals into tri-state mode. This is probably
something that slipped by unnoticed in most designs. If the signals are
put directly into a tri-state mode, then the board is relying on the
pull-up resistors to pull up the chip-select before the next transaction.
Most of the time this is fine, except when you have two transactions that
follow each other very closely, such as the flash erase and read status
register commands. In this case I was seeing a 500ns separation between
the transactions. In my setup, with a 10kOhm pull-up, it would meet
timing spec about half the time and resulted in intermittent errors. (A
stronger pull up would fix this, but our design is targeted for low power
consumption and a 3.3kOhm @ 3.3v is 3.3mW of needless power consumption.)
I modified the spi_cs_deactivate() function in bfin_spi.c to drive the
chip-selects high before putting them into tri-state. For me, this
resulted in a rise time of 5ns instead of the previous rise time of about
1us, and fully satisfied the timing spec of the chip.
Signed-off-by: Todor I Mollov <tmollov@ucsd.edu>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Since the PORTJ on the BF537 is peripheral-only (no GPIO functionality),
then there is no PORTJ_FER register for us to worry about.
Signed-off-by: Sonic Zhang <Sonic.Zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Some SPI devices have special requirements on chip-select handling.
With this patch we can use a GPIO as a chip-select and strictly follow
the SPI_XFER_BEGIN and SPI_XFER_END flags.
Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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Fix setting the SPI Control register, 8 and 16-bit transfers
and a wrong pointer in the free routine in the mxc_spi driver.
Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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This fills out the SPI backend for the Blackfin on-chip SPI peripheral.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
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This adds a driver for the SPI controller found on most AT91 and AVR32
chips, implementing the new SPI API.
Changed in v4:
- Update to new API
- Handle zero-length transfers appropriately. The user may send a
zero-length SPI transfer with SPI_XFER_END set in order to
deactivate the chip select after a series of transfers with chip
select active. This is useful e.g. when polling the status
register of DataFlash.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
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This patch gets rid of the spi_chipsel table and adds a handful of new
functions that makes the SPI layer cleaner and more flexible.
Instead of the spi_chipsel table, each board that wants to use SPI
gets to implement three hooks:
* spi_cs_activate(): Activates the chipselect for a given slave
* spi_cs_deactivate(): Deactivates the chipselect for a given slave
* spi_cs_is_valid(): Determines if the given bus/chipselect
combination can be activated.
Not all drivers may need those extra functions however. If that's the
case, the board code may just leave them out (assuming they know what
the driver needs) or rely on the linker to strip them out (assuming
--gc-sections is being used.)
To set up communication parameters for a given slave, the driver needs
to call spi_setup_slave(). This returns a pointer to an opaque
spi_slave struct which must be passed as a parameter to subsequent SPI
calls. This struct can be freed by calling spi_free_slave(), but most
driver probably don't want to do this.
Before starting one or more SPI transfers, the driver must call
spi_claim_bus() to gain exclusive access to the SPI bus and initialize
the hardware. When all transfers are done, the driver must call
spi_release_bus() to make the bus available to others, and possibly
shut down the SPI controller hardware.
spi_xfer() behaves mostly the same as before, but it now takes a
spi_slave parameter instead of a spi_chipsel function pointer. It also
got a new parameter, flags, which is used to specify chip select
behaviour. This may be extended with other flags in the future.
This patch has been build-tested on all powerpc and arm boards
involved. I have not tested NIOS since I don't have a toolchain for it
installed, so I expect some breakage there even though I've tried
fixing up everything I could find by visual inspection.
I have run-time tested this on AVR32 ATNGW100 using the atmel_spi and
DataFlash drivers posted as a follow-up. I'd like some help testing
other boards that use the existing SPI API.
But most of all, I'd like some comments on the new API. Is this stuff
usable for everyone? If not, why?
Changed in v4:
- Build fixes for various boards, drivers and commands
- Provide common struct spi_slave definition that can be extended by
drivers
- Pass a struct spi_slave * to spi_cs_activate and spi_cs_deactivate
- Make default bus and mode build-time configurable
- Override default SPI bus ID and mode on mx32ads and imx31_litekit.
Changed in v3:
- Add opaque struct spi_slave for controller-specific data associated
with a slave.
- Add spi_claim_bus() and spi_release_bus()
- Add spi_free_slave()
- spi_setup() is now called spi_setup_slave() and returns a
struct spi_slave
- soft_spi now supports four SPI modes (CPOL|CPHA)
- Add bus parameter to spi_setup_slave()
- Convert the new i.MX32 SPI driver
- Convert the new MC13783 RTC driver
Changed in v2:
- Convert the mpc8xxx_spi driver and the mpc8349emds board to the
new API.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Tested-by: Guennadi Liakhovetski <lg@denx.de>
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This commit gets rid of a huge amount of silly white-space issues.
Especially, all sequences of SPACEs followed by TAB characters get
removed (unless they appear in print statements).
Also remove all embedded "vim:" and "vi:" statements which hide
indentation problems.
Signed-off-by: Wolfgang Denk <wd@denx.de>
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This is an SPI driver for i.MX and MXC based SoCs from Freescale. So far
only implemented and tested on i.MX31, can with a modified register layout
and definitions be used for i.MX27, I think, MXC CPUs have similar SPI
controllers too.
Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
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This driver should only compile if CONFIG_MPC8XXX_SPI is set
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
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..and rm unused CONFIG_FSL_SPI define
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
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This patch adds support for the SPI controller found on Freescale PowerPC
processors such as the MCP834x family. Additionally, a new config option,
CONFIG_HARD_SPI, is added for general purpose SPI controller use.
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
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