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* sf: Place the sf calls in proper orderJagannadha Sutradharudu Teki2013-06-23-92/+92
| | | | | | Placed the sf calls in proper order - erase/write/read Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
* sf: Unify spi_flash write codeJagannadha Sutradharudu Teki2013-06-23-67/+63
| | | | | | | Move common flash write code into spi_flash_write_common(). Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Acked-by: Simon Glass <sjg@chromium.org>
* sf: Add flag status register polling supportJagannadha Sutradharudu Teki2013-06-23-4/+21
| | | | | | | | | | | | Flag status register polling is required for micron 512Mb flash devices onwards, for performing erase/program operations. Like polling for WIP(Write-In-Progress) bit in read status register, spi_flash_cmd_wait_ready will poll for PEC(Program-Erase-Control) bit in flag status register. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* sf: Remove spi_flash_cmd_poll_bit()Jagannadha Sutradharudu Teki2013-06-23-12/+3
| | | | | | | | | There is no other call other than spi_flash_cmd_wait_ready(), hence removed spi_flash_cmd_poll_bit and use the poll status code spi_flash_cmd_wait_ready() itself. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* sf: spansion: Add support for S25FL512S_64KJagannadha Sutradharudu Teki2013-06-23-0/+7
| | | | | | Add support for Spansion S25FL512S_64K SPI flash. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
* sf: stmicro: Add support for N25Q1024AJagannadha Sutradharudu Teki2013-06-23-0/+6
| | | | | | Add support for Numonyx N25Q1024A SPI flash. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
* sf: stmicro: Add support for N25Q1024Jagannadha Sutradharudu Teki2013-06-23-0/+6
| | | | | | Add support for Numonyx N25Q1024 SPI flash. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
* sf: stmicro: Add support for N25Q512AJagannadha Sutradharudu Teki2013-06-23-0/+6
| | | | | | Add support for Numonyx N25Q512A SPI flash. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
* sf: stmicro: Add support for N25Q512Jagannadha Sutradharudu Teki2013-06-23-0/+6
| | | | | | Add support for Numonyx N25Q512 SPI flash. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
* sf: Use spi_flash_addr() in write callJagannadha Sutradharudu Teki2013-06-23-5/+2
| | | | | | | | Use the existing spi_flash_addr() for 3-byte addressing cmd filling in write call. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* sf: Add bank addr code in CONFIG_SPI_FLASH_BARJagannadha Sutradharudu Teki2013-06-23-11/+32
| | | | | | | | | | | Defined bank addr code on CONFIG_SPI_FLASH_BAR macro, to reduce the size for existing boards which has < 16Mbytes SPI flashes. It's upto user which has provision to use the bank addr code for flashes which has > 16Mbytes. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* sf: Update sf read to support all sizes of flashesJagannadha Sutradharudu Teki2013-06-23-3/+33
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch updated the spi_flash read func to support all sizes of flashes using bank reg addr facility. The same support has been added in below patch for erase/write spi_flash functions: "sf: Support all sizes of flashes using bank addr reg facility" (sha1: c956f600cbb0943d0afe1004cdb503f4fcd8f415) With these new updates on sf framework, the flashes which has < 16MB are not effected as per as performance is concern and but the u-boot.bin size incrased ~460 bytes. sf update(for first 16MBytes), Changes before: U-Boot> sf update 0x1000000 0x0 0x1000000 - N25Q256 16777216 bytes written, 0 bytes skipped in 199.72s, speed 86480 B/s - W25Q128BV 16777216 bytes written, 0 bytes skipped in 351.739s, speed 48913 B/s - S25FL256S_64K 16777216 bytes written, 0 bytes skipped in 65.659s, speed 262144 B/s sf update(for first 16MBytes), Changes before: U-Boot> sf update 0x1000000 0x0 0x1000000 - N25Q256 16777216 bytes written, 0 bytes skipped in 198.953s, speed 86480 B/s - W25Q128BV 16777216 bytes written, 0 bytes skipped in 350.90s, speed 49200 B/s - S25FL256S_64K 16777216 bytes written, 0 bytes skipped in 66.521s, speed 262144 B/s Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* sf: Update sf to support all sizes of flashesJagannadha Sutradharudu Teki2013-06-23-13/+26
| | | | | | | | | | | | | | | | | Updated the spi_flash framework to handle all sizes of flashes using bank/extd addr reg facility The current implementation in spi_flash supports 3-byte address mode due to this up to 16Mbytes amount of flash is able to access for those flashes which has an actual size of > 16MB. As most of the flashes introduces a bank/extd address registers for accessing the flashes in 16Mbytes of banks if the flash size is > 16Mbytes, this new scheme will add the bank selection feature for performing write/erase operations on all flashes. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* sf: Read flash bank addr register at probe timeJagannadha Sutradharudu Teki2013-06-23-0/+31
| | | | | | | | | | | | | | | Read the flash bank addr register to get the state of bank in a perticular flash. and also bank write happens only when there is a change in bank selection from user. bank read only valid for flashes which has > 16Mbytes those are opearted in 3-byte addr mode, each bank occupies 16Mytes. Suppose if the flash has 64Mbytes size consists of 4 banks like bank0, bank1, bank2 and bank3. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* sf: Discover the bank addr commandsJagannadha Sutradharudu Teki2013-06-23-0/+39
| | | | | | | | | | Bank/Extended addr commands are specific to particular flash vendor so discover them based on the idocode0. Assign the discovered bank commands to spi_flash members so-that the bank read/write will use their specific operations. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
* sf: Add bank address register writing supportJagannadha Sutradharudu Teki2013-06-23-0/+29
| | | | | | | | | | | | | | | This patch provides support to program a flash bank address register. extended/bank address register contains an information to access the 4th byte addressing in 3-byte address mode. reff' the spec for more details about bank addr register in Page-63, Table 8.16 http://www.spansion.com/Support/Datasheets/S25FL128S_256S_00.pdf Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Reviewed-by: Simon Glass <sjg@chromium.org>
* spi: mxc_spi: Use DIV_ROUND_UP at appropriate placesAxel Lin2013-06-22-3/+3
| | | | | | | This change slightly improves readability. Signed-off-by: Axel Lin <axel.lin@ingics.com> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
* spi: cf_qspi: Use DIV_ROUND_UP at appropriate placeAxel Lin2013-06-22-1/+1
| | | | | | | | This change slightly improves readability. Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Richard Retanubun <richardretanubun@ruggedcom.com> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
* sf: winbond: Add support for W25QXXXFVJagannadha Sutradharudu Teki2013-06-22-6/+6
| | | | | | Add support for Winbond W25QXXXFV SPI flash. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
* sf: winbond: Add support for W25Q16DWJagannadha Sutradharudu Teki2013-06-22-0/+5
| | | | | | Add support for Winbond W25Q16DW SPI flash. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
* sf: winbond: Add support for W25Q128FWJagannadha Sutradharudu Teki2013-06-22-0/+5
| | | | | | Add support for Winbond W25Q128FW SPI flash. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
* sf: winbond: Update the names for W25Q 0x40XX ID's flash partsJagannadha Sutradharudu Teki2013-06-22-5/+5
| | | | | | | | Use the exact names for W25Q 0x40XX ID's flash parts, as the same sizes of flashes comes with different ID's. so-that the distinguishes becomes easy with this change. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
* sf: spansion: Correct name of S25FL128S 64K Sector partJagannadha Sutradharudu Teki2013-06-22-1/+1
| | | | | | | | | Corrected the name of S25FL128S 64K sector part SPI flash, S25FL128S supported has been added in below commit "sf: spansion: Add support for S25FL128S" (sha1: 1bfb9f156aa66cca6bb9c773867a1f02a84b14be) Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
* NET: Fix system hanging if NET device is not installedJim Lin2013-06-19-1/+2
| | | | | | | | | | | | | If we try to boot from NET device, NetInitLoop in net.c will be invoked. If NET device is not installed, eth_get_dev() function will return eth_current value, which is NULL. When NetInitLoop is called, "eth_get_dev->enetaddr" will access restricted memory area and therefore cause hanging. This issue is found on Tegra30 Cardhu platform after adding CONFIG_CMD_NET and CONFIG_CMD_DHCP in config header file. Signed-off-by: Jim Lin <jilin@nvidia.com> Tested-by: Stephen Warren <swarren@nvidia.com>
* image: Use ENOENT instead of ENOMEDIUM for better compatibilitySimon Glass2013-06-17-1/+1
| | | | | | | | | This error may not be defined on some platforms such as MacOS so host compilation will fail. Use one of the more common errors instead. Signed-off-by: Simon Glass <sjg@chromium.org> Tested-by: Andreas Bießmann <andreas.devel@googlemail.com> Tested-by: Lubomir Popov <lpopov@mm-sol.com>
* Merge branch 'master' of git://www.denx.de/git/u-boot-mmcTom Rini2013-06-14-27/+156
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| * ARM: tegra: make use of negative ENV_OFFSET on NVIDIA boardsStephen Warren2013-06-13-8/+8
| | | | | | | | | | | | | | | | | | | | | | Use a negative value of CONFIG_ENV_OFFSET for all NVIDIA reference boards that store the U-Boot environment in the 2nd eMMC boot partition. This makes U-Boot agnostic to the size of the eMMC boot partition, which can vary depending on which eMMC device was actually stuffed into the board. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Tom Warren <twarren@nvidia.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
| * env_mmc: allow negative CONFIG_ENV_OFFSETStephen Warren2013-06-13-2/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A negative value of CONFIG_ENV_OFFSET is treated as a backwards offset from the end of the eMMC device/partition, rather than a forwards offset from the start. This is useful when a single board may be stuffed with different eMMC devices, each of which has a different capacity, and you always want the environment to be stored at the very end of the device (or eMMC boot partition for example). One example of this case is NVIDIA's Ventana reference board. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
| * mmc: report capacity for the selected partitionStephen Warren2013-06-13-7/+68
| | | | | | | | | | | | | | | | | | | | | | | | | | Enhance the MMC core to calculate the size of each MMC partition, and update mmc->capacity whenever a partition is selected. This causes: mmc dev 0 1 ; mmcinfo ... to report the size of the currently selected partition, rather than always reporting the size of the user partition. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
| * README: document CONFIG_ENV_IS_IN_MMCStephen Warren2013-06-13-0/+40
| | | | | | | | | | | | | | | | | | | | Describe the meaning of CONFIG_ENV_IS_IN_MMC, and all related defines that must or can be set when using that option. Signed-off-by: Stephen Warren <swarren@nvidia.com> Reviewed-by: Peter Korsgaard <jacmet@sunsite.dk> Acked-by: Tom Rini <trini@ti.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
| * fsl_esdhc: Do not clear interrupt status bits until data processedAndrew Gabbasov2013-06-13-4/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | After waiting for the command completion event, the interrupt status bits, that occured to be set by that time, are cleared by writing them back. It is supposed, that it should be command related bits (command complete and may be command errors). However, in some cases the DMA already completes by that time before the full transaction completes. The corresponding DINT bit gets set and then cleared before even entering the loop, waiting for data part completion. That waiting loop never gets this bit set, causing the operation to hang. This is reported to happen, for example, for write operation of 1 sector to upper area (block #7400000) of SanDisk Ultra II 8GB card. The solution could be to explicitly clear only command related interrupt status bits. However, since subsequent processing does not rely on any command bits state, it could be easier just to remove clearing of any bits at that point, leaving them all until all data processing completes. After that the whole register will be cleared at once. Also, on occasion, interrupts masking moved to before writing the command, just for the case there should be no chance of interrupt between the first command and interrupts masking. Reported-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Andrew Gabbasov <andrew_gabbasov@mentor.com> Acked-by: Dirk Behme <dirk.behme@de.bosch.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
| * mmc: fsl_esdhc: Fix hang after 'save' commandFabio Estevam2013-06-13-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Since commit 48e0b2bd (powerpc/esdhc: Correct judgement for DATA PIO mode) we see mx6 systems to hang after doing a 'save' command. Revert this commit since the original 'ifdef' logic from 7b43db92 (drivers/mmc/fsl_esdhc.c: fix compiler warnings) was the correct one. Reported-by: Tapani Utriainen <tapani@technexion.com> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
| * mmc write bug fixRuud Commandeur2013-06-13-3/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes a bug related to mmc writes. When doing fatwrites on an SD-Card, MMC bus problems can occur. Depending on the size of the file, "MMC0: Bus busy timeout!" is reported, resulting in an SD-Card that is no longer responding. It appears to be, that set_cluster can be called with a size being zero. That can be with a file that has a size being an exact multiple (including 0) of the clustersize, but also for files that are smaller than the size of one cluster. The same problem occurs if the "mmc write" command is given with a block count being 0. By adding a check for the block count being zero in mmc_write_blocks (drivers/mmc.c), this problem is solved. Signed-off-by: Ruud Commandeur <rcommandeur@clb.nl> Cc: Tom Rini <trini@ti.com> Cc: Benoît Thébaudeau <benoit.thebaudeau@advansee.com> Cc: Mats Karrman <Mats.Karrman@tritech.se> Cc: Andy Fleming <afleming@gmail.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
| * mmc: sdhci: Enable 8-bit bus width only for 3.0 spec onwardsJagannadha Sutradharudu Teki2013-06-13-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CAP register don't have any information for 8-bit buswidth support on 2.0 sdhci spec, only from 3.0 onwards bit[18] got this information. Due to this misassignment in sdhci, mmc is setting 8-bit buswidth using mmc_set_bus_width even if controller doesn't support. Below change has code information. "mmc: Properly determine maximum supported bus width" (sha1: 7798f6dbd5e1a3030ed81a81da5dfb57c3307cac) Bug log: <mmc plus and emmc cards) ------- zynq-uboot> mmcinfo Error detected in status(0x208100)! Device: zynq_sdhci Manufacturer ID: fe ..... So enable 8-bit support only for 3.0 spec using CAP and for below 3.0 assign mmc->host_caps = MMC_MODE_8BIT on respective platform driver if host have a support. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
| * mmc: fix env in mmc with redundant compile errorBo Shen2013-06-13-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The commit d196bd8 (env_mmc: add support for redundant environment) introduce the following compile error when enable redundant environment support with MMC ---8<--- env_mmc.c:149: error: 'env_t' has no member named 'flags' env_mmc.c:248: error: 'env_t' has no member named 'flags' env_mmc.c:248: error: 'env_t' has no member named 'flags' env_mmc.c:250: error: 'env_t' has no member named 'flags' env_mmc.c:250: error: 'env_t' has no member named 'flags' env_mmc.c:252: error: 'env_t' has no member named 'flags' env_mmc.c:252: error: 'env_t' has no member named 'flags' env_mmc.c:254: error: 'env_t' has no member named 'flags' env_mmc.c:254: error: 'env_t' has no member named 'flags' env_mmc.c:267: error: 'env_t' has no member named 'flags' make[1]: *** [env_mmc.o] Error 1 --->8--- Add this patch to fix it Signed-off-by: Bo Shen <voice.shen@atmel.com> Reviewed-by: Michael Heimpold <mhei@heimpold.de> Signed-off-by: Andy Fleming <afleming@freescale.com>
* | Prepare v2013.07-rc1Tom Rini2013-06-14-2/+2
| | | | | | | | Signed-off-by: Tom Rini <trini@ti.com>
* | Merge branch 'master' of git://git.denx.de/u-boot-spiTom Rini2013-06-13-54/+122
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| * | sf: winbond: Correct the nr_blocks used for W25Q32DWJagannadha Sutradharudu Teki2013-06-13-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch corrected the nr_blocks used for W25Q32DW SPI flash. nr_blcoks are incorrectly assigned on below patch "sf: winbond: add W25Q32DW" (sha1: 772ba15474f73adc942e817cc072b6e9750836cc) Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
| * | sf: winbond: Add support for W25Q80BWJagannadha Sutradharudu Teki2013-06-13-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for Winbond W25Q80BW SPI flash. This patch corrected the flash name, nr_blocks and also commit message header from below patch. "sf: winbond: add W25Q32" (sha1: c969abc47033d6f810d3c9dbdb994ea9d691d038) Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
| * | sf: spansion: Update the name for S25FL256S flashJagannadha Sutradharudu Teki2013-06-13-1/+1
| | | | | | | | | | | | | | | | | | | | | As the per the ID tabl the flash is under Uniform 64-kB sector architecture, hence updated with proper name. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
| * | spi: tegra20_sflash: Remove redundant code to set bus and cs of struct spi_slaveAxel Lin2013-06-13-2/+0
| | | | | | | | | | | | | | | | | | | | | | | | It's done in spi_alloc_slave(), thus remove the redundant code. Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Marek Vasut <marex@denx.de> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
| * | spi: tegra114_spi: Convert to use spi_alloc_slave()Axel Lin2013-06-13-3/+1
| | | | | | | | | | | | | | | | | | Signed-off-by: Axel Lin <axel.lin@ingics.com> Acked-by: Marek Vasut <marex@denx.de> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
| * | spi: armada100_spi: Remove unnecessary NULL test for dout and dinAxel Lin2013-06-13-9/+2
| | | | | | | | | | | | | | | | | | | | | Signed-off-by: Axel Lin <axel.lin@ingics.com> Reviewed-by: Marek Vasut <marex@denx.de> Acked-by: Ajay Bhargav <ajay.bhargav@einfochips.com> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
| * | cmd_sf: Add print mesgs on sf read/write commandsJagannadha Sutradharudu Teki2013-06-03-14/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a print messages while using 'sf read' and 'sf write' commands to make sure that how many bytes read/written from/into flash device. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Acked-by: Tom Rini <trini@ti.com>
| * | cmd_sf: Add print mesg for 'sf erase' commandJagannadha Sutradharudu Teki2013-06-03-10/+5
| | | | | | | | | | | | | | | | | | | | | | | | This patch adds a print messages while using 'sf erase' command to make sure that how many bytes erased in flash device. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Acked-by: Tom Rini <trini@ti.com>
| * | sf: Fix sf read for memory-mapped SPI flashesJagannadha Sutradharudu Teki2013-06-03-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Missing return after memcpy is done for memory-mapped SPI flashes, hence added retun 0 after memcpy done. The return is missing in below patch "sf: Enable FDT-based configuration and memory mapping" (sha1: bb8215f437a7c948eec82a6abe754c226978bd6d) Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Acked-by: Simon Glass <sjg@chromium.org>
| * | spi: exynos: Support SPI_PREAMBLE modeRajeshwari Shinde2013-06-03-10/+59
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Support interfaces with a preamble before each received message. We handle this when the client has requested a SPI_XFER_END, meaning that we must close of the transaction. In this case we read until we see the preamble (or a timeout occurs), skipping all data before and including the preamble. The client will receive only data bytes after the preamble. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
| * | spi: Add support for preamble bytesRajeshwari Shinde2013-06-03-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | A SPI slave may take time to react to a request. For SPI flash devices this time is defined as one bit time, or a whole byte for 'fast read' mode. If the SPI slave is another CPU, then the time it takes to react may vary. It is convenient to allow the slave device to tag the start of the actual reply so that the host can determine when this 'preamble' finishes and the actual message starts. Add a preamble flag to the available SPI flags. If supported by the driver then it will ignore any received bytes before the preamble on each transaction. This ensures that reliable communication with the slave is possible. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
| * | sf: winbond: Add support for W25PXX SPI flashKuo-Jung Su2013-05-28-1/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support for Winbond's W25PXX SPI flash. These devices is used on Faraday A369 evaluation board. Signed-off-by: Kuo-Jung Su <dantesu@faraday-tech.com> CC: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com> CC: Tom Rini <trini@ti.com> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
| * | sf: winbond: Add support for W25Q256Jagannadha Sutradharudu Teki2013-05-28-0/+5
| | | | | | | | | | | | | | | | | | | | | Add support for Winbond W25Q256 SPI flash. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
generated by cgit v1.1 at 2024-12-12 12:43:11 +0000