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* ftsmc020: fix relocationMacpaul Lin2011-05-12-4/+3
| | | | | | Avoid relocation problem by fix global declaration. Signed-off-by: Macpaul Lin <macpaul@andestech.com>
* ftide020: add faraday ide ahb controllerMacpaul Lin2011-05-12-0/+651
| | | | | | | | | | | | | | Faraday's ftide020_s is an IDE-AHB controller for SoC design. This patch add the u-boot driver (PIO) of ftide020 ATA (IDE) driver. IDE commands include read, info, and other functions has been implemented. Because this IDE controller support AHB interface only which is differ from other most IDE controller supports PCI interface. Some registers access is required during CMD/DATA I/O. Hence a configuration "CONFIG_IDE_AHB" is required to be defined according to the feature in cmd_ide.c. Signed-off-by: Macpaul Lin <macpaul@andestech.com>
* hwmon: Extend lm63.c to support LM64Dirk Eibach2011-05-12-4/+24
| | | | | | | | | This patch adds support for the National LM64 temperature sensor with integrated fan control to lm63.c. Main difference between LM63 and LM64 is 16°C offset in sensor readings. Signed-off-by: Dirk Eibach <eibach@gdsys.de>
* net: xilinx emaclite: Fix return valuesMichal Simek2011-05-12-7/+7
| | | | | | Fix return values for initialize/init/recv/send functions Signed-off-by: Michal Simek <monstr@monstr.eu>
* NET: pass source IP address to packet handlersLuca Ceresoli2011-05-12-2/+3
| | | | | | | | | | This is needed for the upcoming TFTP server implementation. This also simplifies PingHandler() and fixes rxhand_f documentation. Signed-off-by: Luca Ceresoli <luca.ceresoli@comelit.it> Cc: Wolfgang Denk <wd@denx.de> Acked-by: Detlev Zundel <dzu@denx.de>
* Merge branch 'master' of git://git.denx.de/u-boot-armWolfgang Denk2011-05-12-2/+3
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| * gpio: imx: Fix return value on errorFabio Estevam2011-05-11-2/+3
| | | | | | | | Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
* | Serial: p1011: new vendor init optionsJohn Rigby2011-05-12-3/+31
|/ | | | | | | | | | | | | | | | | | | | Two new options: CONFIG_PL011_SERIAL_RLCR Some vendor versions of PL011 serial ports (e.g. ST-Ericsson U8500) have separate receive and transmit line control registers. Set this variable to initialize the extra register. CONFIG_PL011_SERIAL_FLUSH_ON_INIT On some platforms (e.g. U8500) U-Boot is loaded by a second stage boot loader that has already initialized the UART. Define this variable to flush the UART at init time. empty fifo on init Signed-off-by: John Rigby <john.rigby@linaro.org> Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
* Merge branch 'master' of git://git.denx.de/u-boot-mpc85xxWolfgang Denk2011-04-30-0/+335
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| * powerpc: eSPI and eSPI controller supportMingkai Hu2011-04-29-0/+335
| | | | | | | | | | | | | | | | Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com> Singed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com> Signed-off-by: Shaohui Xie <b21989@freescale.com> Cc: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
* | spi: add new driver for OpenCores tiny_spiThomas Chou2011-04-30-0/+249
| | | | | | | | | | | | | | | | This patch adds support for OpenCores tiny_spi. http://opencores.org/project,tiny_spi Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
* | Merge branch 'master' of git://git.denx.de/u-boot-mmcWolfgang Denk2011-04-29-6/+653
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| * | fsl_esdhc: Fix multi-block read restriction on i.MX53 eSDHCv2Jason Liu2011-04-29-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For freescale i.MX53 eSDHCv2, when using CMD12, cmdtype need to be set to ABORT, otherwise, next read command will hang. This is a software Software Restrictions in i.MX53 reference manual: 29.7.8 Multi-block Read For pre-defined multi-block read operation, that is,the number of blocks to read has been defined by previous CMD23 for MMC, or pre-defined number of blocks in CMD53 for SDIO/SDCombo,or whatever multi-block read without abort command at card side, an abort command, either automatic or manual CMD12/CMD52, is still required by ESDHC after the pre-defined number of blocks are done, to drive the internal state machine to idle mode. In this case, the card may not respond to this extra abort command and ESDHC will get Response Timeout. It is recommended to manually send an abort command with RSPTYP[1:0] both bits cleared. Signed-off-by: Jason Liu <jason.hui@linaro.org>
| * | MMC: omap_hsmmc.c: disable multiblock rw on old rev omap34xx siliconJohn Rigby2011-04-29-0/+8
| | | | | | | | | | | | Signed-off-by: John Rigby <john.rigby@linaro.org>
| * | MMC: make b_max unconditionalJohn Rigby2011-04-29-6/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make existing field b_max field in struct mmc unconditional and use it instead of CONFIG_SYS_MMC_MAX_BLK_COUNT in mmc_bread and mmc_bwrite. Initialize b_max to CONFIG_SYS_MMC_MAX_BLK_COUNT in mmc_register if it has not been initialized by the hw driver. Initialize b_max to 0 in all callers to mmc_register. Signed-off-by: John Rigby <john.rigby@linaro.org> Signed-off-by: Andy Fleming <afleming@freescale.com>
| * | MMC: Add support for PL180 ARM mmc deviceMatt Waddel2011-04-29-0/+625
| |/ | | | | | | | | | | | | Add support for the ARM PrimeCell MultiMedia Interface - PL180. Ported from original device driver written by ST-Ericsson. Signed-off-by: Matt Waddel <matt.waddel@linaro.org>
* | Merge branch 'master' of git://git.denx.de/u-boot-videoWolfgang Denk2011-04-28-310/+308
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| * | powerpc: use 'video-mode' environment variable to configure DIUTimur Tabi2011-04-28-306/+226
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the 'video-mode' environment variable (for Freescale chips that have a DIU display controller) to designate the full video configuration. Previously, the DIU driver used the 'monitor' variable, and it was used only to determine the output video port. The old definition of the "monitor" environment variable only determines which video port to use for output. This variable was set to a number (0, 1, or sometimes 2) to specify a DVI, LVDS, or Dual-LVDS port. The resolution was hard-coded into board-specific code. The Linux command-line arguments needed to be hard-coded to the proper video definition string. Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Anatolij Gustschin <agust@denx.de>
| * | video: parse the video-mode environment variableTimur Tabi2011-04-28-0/+67
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add function video_get_video_mode(), which parses the "video-mode" environment variable and returns each of its components. The format matches the video= command-line option used for Linux: video-mode=<driver>:<xres>x<yres>-<depth>@<freq><,option=string> <driver> The video driver, ignored by U-Boot <xres> The X resolution (in pixels) to use. <yres> The Y resolution (in pixels) to use. <depth> The color depth (in bits) to use. <freq> The frequency (in Hz) to use. <options> A comma-separated list of device-specific options Signed-off-by: Timur Tabi <timur@freescale.com>
| * | cfb_console: fix RLE bitmap drawing codeAnatolij Gustschin2011-04-28-4/+15
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There seems to be tools producing incorrect 'end of bitmap data' markers '0100' in a RLE bitmap. Drawing such bitmaps can result in overwriting memory above the frame buffer. E.g. on MPC5121e based boards this memory can contain U-Boot environment. We may not rely on the correct end of bitmap data marker 0001 only, but also have to check whether we are going to draw a valid frame buffer scan line. The patch provides a fix by maintaining a pixel counter which is incremented by the amount of pixels we are going to draw. If the counter exceeds frame buffer pixels limit we stop the drawing with the error message. Reported-by: Michael Weiss <michael.weiss@ifm.com> Signed-off-by: Anatolij Gustschin <agust@denx.de> Tested-by: Anatolij Gustschin <agust@denx.de>
* | i2c, soft_i2c: deblock bus if switching to another i2c busHeiko Schocher2011-04-28-0/+1
|/ | | | | | | | | | | | Deblock i2c bus when switching to another i2c bus, if using i2c_set_bus_num(). Signed-off-by: Heiko Schocher <hs@denx.de> cc: Wolfgang Denk <wd@denx.de> cc: Detlev Zundel <dzu@denx.de> cc: Valentin Longchamp <valentin.longchamp@keymile.com> cc: Holger Brunck <holger.brunck@keymile.com> Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
* Merge branch 'master' of git://git.denx.de/u-boot-armWolfgang Denk2011-04-27-178/+665
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| * ftsmc020: move ftsmc020 static mem controller to driver/mtdMacpaul Lin2011-04-27-0/+52
| | | | | | | | | | | | | | | | | | | | | | Move the header file and definitions of ftsmc020 static memory control unit from a320 SoC folder to "drivers/mtd" folder. This change will let other SoC which also use ftsmc020 could share the same header file. Signed-off-by: Macpaul Lin <macpaul@andestech.com>
| * Replace obsolete e-mail addressAlbert ARIBAUD2011-04-27-3/+3
| | | | | | | | Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
| * ftpmu010: fix relocation and enhance featuresMacpaul Lin2011-04-27-2/+37
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. ftpmu010.h: fix and add definitions Enhanced for more features and asm related support according to datasheet. Note: - FTPMU010_PDLLCR0_HCLKOUTDIS is "incorrect" in datasheet. - FTPMU010_PDLLCR0_DLLFRANG is only 1 bit at bit #19. (not 20-19) - FTPMU010_PDLLCR0_HCLKOUTDIS is 4 bits at bit #20. (not 24-21) 2. ftpmu010.c: enhance features and fix relocation - The following functions is added for pmu features. ftpmu010_mfpsr_select_dev() ftpmu010_sdramhtc_set() - This patch also fix the declare statement for relocation. Signed-off-by: Macpaul Lin <macpaul@andestech.com>
| * I2C: mv_i2c: add multi bus supportLei Wen2011-04-27-1/+35
| | | | | | | | | | | | | | | | Add the ability to support multiple i2c bus for mv_i2c Acked-by: Heiko Schocher <hs@denx.de> Acked-by: Prafulla Wadaskar <prafulla@marvell.com> Signed-off-by: Lei Wen <leiwen@marvell.com>
| * mv_i2c: use structure to replace the direclty defineLei Wen2011-04-27-73/+151
| | | | | | | | | | | | | | | | | | | | Add i2c_clk_enable in the cpu specific code, since previous platform it, while new platform don't need. In the pantheon and armada100 platform, this function is defined as NULL one. Acked-by: Heiko Schocher <hs@denx.de> Acked-by: Prafulla Wadaskar <prafulla@marvell.com> Signed-off-by: Lei Wen <leiwen@marvell.com>
| * mv_i2c: fix timeout value to be consistent with commentsLei Wen2011-04-27-1/+1
| | | | | | | | | | | | | | | | | | The original 10000 value would be 100ms, which is not the comments said. Acked-by: Heiko Schocher <hs@denx.de> Acked-by: Prafulla Wadaskar <prafulla@marvell.com> Signed-off-by: Lei Wen <leiwen@marvell.com>
| * pxa: move i2c driver to the common placeLei Wen2011-04-27-0/+453
| | | | | | | | | | | | | | | | | | For better sharing with other platform other than pxa's, it is more convenient to put the driver to the common place. Acked-by: Heiko Schocher <hs@denx.de> Acked-by: Prafulla Wadaskar <prafulla@marvell.com> Signed-off-by: Lei Wen <leiwen@marvell.com>
| * power: ftpmu010: move drivers/power/ftpmu010.h to include/faradayPo-Yu Chuang2011-04-27-147/+1
| | | | | | | | | | | | | | Also add API declarations. Signed-off-by: Po-Yu Chuang <ratbert@faraday-tech.com> Signed-off-by: Albert Aribaud <albert.aribaud@free.fr>
| * IMX: MX31: Cleanup include files and drop nasty #ifdef in driversStefano Babic2011-04-27-26/+7
| | | | | | | | | | | | | | | | | | | | As exception among the i.MX processors, the i.MX31 has headers without general names (mx31-regs.h, mx31.h instead of imx-regs.h and clock.h). This requires several nasty #ifdef in the drivers to include the correct header. The patch cleans up the driver and renames the header files as for the other i.MX processors. Signed-off-by: Stefano Babic <sbabic@denx.de>
* | Merge branch 'spi' of git://git.denx.de/u-boot-blackfinWolfgang Denk2011-04-27-13/+19
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| * bfin_spi: add spi_set_speedThomas Chou2011-04-25-13/+19
| | | | | | | | | | | | | | The new speed will be applied by spi_claim_bus. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* | rtc, rv3029: add trickle charger support.Heiko Schocher2011-04-26-0/+87
|/ | | | | Signed-off-by: Heiko Schocher <hs@denx.de> Acked-by: Detlev Zundel <dzu@denx.de>
* cfi_flash driver - Add delay after reset commandAaron Williams2011-04-21-0/+7
| | | | | | | | | | | | | I ran into a problem where the reset was failing except when I enabled debugging support. After talking with Garret Swalling at Spansion I was told that the GL-N series of devices require a 500ns wait for the reset to complete. The below patch adds a 1us delay after all reset commands. -Aaron Williams Signed-off-by: Aaron Williams <aaron.williams@caviumnetworks.com> Signed-off-by: Stefan Roese <sr@denx.de>
* mtd, cfi: read AMD 3-byte (expanded) device ids on 16bit devicesHeiko Schocher2011-04-21-2/+11
| | | | | | | | | | | | | | | | | | | | | tested on the a4m072 board with a S29GL512P flash. flinfo without this patch Bank # 1: CFI conformant flash (16 x 16) Size: 32 MB in 256 Sectors AMD Standard command set, Manufacturer ID: 0x01, Device ID: 0x227E Erase timeout: 16384 ms, write timeout: 2 ms Buffer write timeout: 5 ms, buffer size: 32 bytes [...] flinfo with this patch Bank # 1: CFI conformant flash (16 x 16) Size: 32 MB in 256 Sectors AMD Standard command set, Manufacturer ID: 0x01, Device ID: 0x227E2301 Erase timeout: 16384 ms, write timeout: 2 ms Buffer write timeout: 5 ms, buffer size: 32 bytes [...] Signed-off-by: Heiko Schocher <hs@denx.de> Signed-off-by: Stefan Roese <sr@denx.de>
* cfi_flash: reverse geometry for M29W800DT partsMike Frysinger2011-04-21-3/+4
| | | | | | | | | | | | | | | | | | | | | | The M29W800DT parts also report their geometry with the sector layout reversed. So add that ID to the flash_fixup_stm function. Otherwise, we get: bfin> flinfo Bank # 1: CFI conformant FLASH (16 x 16) Size: 1 MB in 19 Sectors AMD Standard command set, Manufacturer ID: 0x20, Device ID: 0x22D7 Erase timeout: 8192 ms, write timeout: 1 ms Sector Start Addresses: 20000000 20004000 20006000 20008000 20010000 20020000 20030000 20040000 20050000 20060000 20070000 20080000 20090000 200A0000 200B0000 200C0000 200D0000 200E0000 200F0000 Reported-by: Jianxi Fu <fujianxi@gmail.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Stefan Roese <sr@denx.de>
* Merge branch 'phylib' of git://git.denx.de/u-boot-mmcWolfgang Denk2011-04-20-1864/+2890
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| * fsl: Change fsl_phy_enet_if to phy_interface_tAndy Fleming2011-04-20-46/+49
| | | | | | | | | | | | | | | | | | | | | | | | The fsl_phy_enet_if enum was, essentially, the phy_interface_t enum. This meant that drivers which used fsl_phy_enet_if to deal with PHY interfaces would have to convert between the two (or we would have to have them mirror each other, and deal with the ensuing maintenance headache). Instead, we switch all clients of fsl_phy_enet_if over to phy_interface_t, which should become the standard, anyway. Signed-off-by: Andy Fleming <afleming@freescale.com> Acked-by: Detlev Zundel <dzu@denx.de>
| * tsec: Convert tsec to use PHY LibAndy Fleming2011-04-20-1505/+219
| | | | | | | | | | | | | | | | | | | | | | | | | | This converts tsec to use the new PHY Lib. All of the old PHY support is ripped out. The old MDIO driver is split off, and placed in fsl_mdio.c. The initialization is modified to initialize the MDIO driver as well. The powerpc config file is modified to configure PHYLIB if TSEC_ENET is configured. Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Detlev Zundel <dzu@denx.de>
| * phylib: Add a bunch of PHY drivers from tsecAndy Fleming2011-04-20-0/+1500
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The tsec driver had a bunch of PHY drivers already written. This converts them all into PHY Lib drivers, and serves as the first set of PHY drivers for PHY Lib. While doing that, cleaned up a number of magic numbers (though not all of them, as PHY vendors like to keep their numbers as magical as possible). Also, noticed that almost all of the vitesse/cicada PHYs had the same config/parse/startup functions, so those have been collapsed into one. Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Detlev Zundel <dzu@denx.de>
| * Create PHY Lib for U-BootAndy Fleming2011-04-20-0/+831
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Extends the mii_dev structure to participate in a full-blown MDIO and PHY driver scheme. The mii_dev structure and miiphy calls are modified in such a way to allow the original mii command and miiphy infrastructure to work as before, but also to support a new set of APIs which allow (among other things) sharing of PHY driver code and 10G support The mii command will continue to support normal PHY management functions (Clause 22 of 802.3), but will not be changed to support 10G (Clause 45). The basic design is similar to PHY Lib from Linux, but simplified for U-Boot's network and driver infrastructure. We now have MDIO drivers and PHY drivers An MDIO driver provides: read write reset A PHY driver provides: (optionally): probe config - initial setup, starting of auto-negotiation startup - waiting for AN, and reading link state shutdown - any cleanup needed The ethernet drivers interact with the PHY Lib using these functions: phy_connect() phy_config() phy_startup() phy_shutdown() Each PHY driver can be configured separately, or all at once using config_phylib_all_drivers.h (added in the patch which adds the drivers) We also provide generic drivers for Clause 22 (10/100/1000), and Clause 45 (10G) PHYs. We also implement phy_reset(), and call it in phy_connect(). Because phy_reset() is essentially the same as miiphy_reset, but: a) must support 10G PHYs, and b) should use the phylib primitives, we implement miiphy_reset, using phy_reset(), but only when CONFIG_PHYLIB is set. Otherwise, we just use the old version. In this way, we save on compile size, even if we don't manage to save code size. Pulled ethtool.h and mdio.h from: git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6 782d640afd15af7a1faf01cfe566ca4ac511319d With many, many deletions so as to enable compilation under u-boot Signed-off-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Detlev Zundel <dzu@denx.de>
| * Remove instances of phy_read/writeAndy Fleming2011-04-20-107/+107
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There were a few files which were already using phy_read and phy_write for their PHY function names. It's only a few places, and the name seems most appropriate for the high-level abstraction, so let's rename the other versions to something more specific. Also, uec_phy.c had a marvell_init function which I renamed to not conflict with the one in marvell.c Lastly, uec_phy.c was putting a space between the phy writing function names, and the open paren, so I fixed that Signed-off-by: Andy Fleming <afleming@freescale.com> Acked-by: Detlev Zundel <dzu@denx.de>
| * tsec: arrange the code to avoid useless function declarationMingkai Hu2011-04-20-440/+415
| | | | | | | | | | | | | | | | | | | | This is merely a rearrangement. No changes to the code, except to remove now-useless declarations. Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com> Acked-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Detlev Zundel <dzu@denx.de>
| * tsec: use IO accessors for IO accessesMingkai Hu2011-04-20-123/+126
| | | | | | | | | | | | | | Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com> Acked-by: Andy Fleming <afleming@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Detlev Zundel <dzu@denx.de>
* | Merge branch 'master' of git://git.denx.de/u-boot-nand-flashWolfgang Denk2011-04-20-9/+13
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| * | NAND: rearrange ONFI revision checking, add ONFI 2.3Florian Fainelli2011-04-15-8/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch sync with Brian's patch on Linux in nand_flash_detect_onfi() commit b7b1a29d94c17e4341856381bccb4d17495bea60 Author: Brian Norris <computersforpeace@gmail.com> Date: Sun Dec 12 00:23:33 2010 -0800 mtd: nand: rearrange ONFI revision checking, add ONFI 2.3 In checking for the ONFI revision, the first conditional (for checking "unsupported" ONFI) seems unnecessary. All ONFI revisions should be backwards-compatible; even if this is not the case on some newer ONFI revision, it should simply fail the second version-checking if-else block (i.e., the bit-fields for 1.0, 2.0, etc. would not be set to 1). Thus, we move our "unsupported" condition after having checked each bit field. Also, it's simple enough to add a condition for ONFI revision 2.3. Note that this does *NOT* mean we handle all new features of ONFI versions above 1.0. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Acked-by: Florian Fainelli <ffainelli@freebox.fr> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Florian Fainelli <florian@openwrt.org>
| * | NAND: Fix integer overflow in ONFI detection of chips >= 4GiBFlorian Fainelli2011-04-15-1/+1
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | This patch sync with David's patch on Linux in nand_flash_detect_onfi() commit 4ccb3b4497ce01fab4933704fe21581e30fda1a5 Author: David Woodhouse <David.Woodhouse@intel.com> Date: Fri Dec 3 16:36:34 2010 +0000 mtd: nand: Fix integer overflow in ONFI detection of chips >= 4GiB Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Florian Fainelli <florian@openwrt.org>
* | Merge branch 'master' of git://git.denx.de/u-boot-i2cWolfgang Denk2011-04-20-31/+11
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| * | I2C: OMAP: detect more devices when probing an i2c busNick Thompson2011-04-14-31/+11
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The omap24xx driver only seems to support devices that have a single subaddress byte. With these types of devices, the first access in a bus transaction is usually a write (writes the subaddress) followed by either a read or write to access the devices registers. Many such devices will respond to a read as the first access, but there are at least some that will NACK such a read. (e.g. ADV7180.) The probe function attempts to detect a devices ACK to a read access only and fails to find devices that NACK a read. This commit modifies the probe function to start a write instead. This detects devices that respond to reads (since they must also respond to writes) as well as those that only respond to writes. The bus is immediately set to idle after a (N)ACK avoiding actually writing anything to the device. Signed-off-by: Nick Thompson <nick.thompson@ge.com>
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