From 52409fae3e4b8d16b68b61902fc09075cd97b75d Mon Sep 17 00:00:00 2001 From: Dominik Sliwa Date: Sun, 2 Jul 2017 16:41:37 +0200 Subject: Backports generated from 4.11 kernel Initial commit. Signed-off-by: Dominik Sliwa --- drivers/bcma/driver_chipcommon_nflash.c | 44 +++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 drivers/bcma/driver_chipcommon_nflash.c (limited to 'drivers/bcma/driver_chipcommon_nflash.c') diff --git a/drivers/bcma/driver_chipcommon_nflash.c b/drivers/bcma/driver_chipcommon_nflash.c new file mode 100644 index 0000000..d4f699a --- /dev/null +++ b/drivers/bcma/driver_chipcommon_nflash.c @@ -0,0 +1,44 @@ +/* + * Broadcom specific AMBA + * ChipCommon NAND flash interface + * + * Licensed under the GNU/GPL. See COPYING for details. + */ + +#include "bcma_private.h" + +#include +#include + +struct platform_device bcma_nflash_dev = { + .name = "bcma_nflash", + .num_resources = 0, +}; + +/* Initialize NAND flash access */ +int bcma_nflash_init(struct bcma_drv_cc *cc) +{ + struct bcma_bus *bus = cc->core->bus; + + if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4706 && + cc->core->id.rev != 38) { + bcma_err(bus, "NAND flash on unsupported board!\n"); + return -ENOTSUPP; + } + + if (!(cc->capabilities & BCMA_CC_CAP_NFLASH)) { + bcma_err(bus, "NAND flash not present according to ChipCommon\n"); + return -ENODEV; + } + + cc->nflash.present = true; + if (cc->core->id.rev == 38 && + (cc->status & BCMA_CC_CHIPST_5357_NAND_BOOT)) + cc->nflash.boot = true; + + /* Prepare platform device, but don't register it yet. It's too early, + * malloc (required by device_private_init) is not available yet. */ + bcma_nflash_dev.dev.platform_data = &cc->nflash; + + return 0; +} -- cgit v1.2.3