From patchwork Mon Nov 7 06:28:49 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [1/3] external/common: Teach ARM code to erase 'mtd chips' From: Cyril Bur X-Patchwork-Id: 691765 Message-Id: <20161107062851.1016-1-cyril.bur@au1.ibm.com> To: skiboot@lists.ozlabs.org Date: Mon, 7 Nov 2016 17:28:49 +1100 Currently the arch flash code for all architectures can only perform chip erases if there is a real flash driver attached. With increasing use of MTD on both host and BMC this code needs to know how to behave of the backend of blocklevel is MTD. This patch teaches the ARM specific code to pass an erase for the full size of the chip down the stack. This can be optimised into a chip erase within the kernel. Signed-off-by: Cyril Bur --- external/common/arch_flash_arm.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/external/common/arch_flash_arm.c b/external/common/arch_flash_arm.c index 697609d..bb8800f 100644 --- a/external/common/arch_flash_arm.c +++ b/external/common/arch_flash_arm.c @@ -300,8 +300,17 @@ int arch_flash_erase_chip(struct blocklevel_device *bl) if (!arch_data.init_bl || arch_data.init_bl != bl) return -1; - if (!arch_data.flash_chip) - return -1; + if (!arch_data.flash_chip) { + /* Just assume its a regular erase */ + int rc; + uint64_t total_size; + + rc = blocklevel_get_info(bl, NULL, &total_size, NULL); + if (rc) + return rc; + + return blocklevel_erase(bl, 0, total_size); + } return flash_erase_chip(arch_data.flash_chip); }