From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wolfgang Denk Date: Thu, 25 Mar 2010 12:49:12 +0100 Subject: [U-Boot] [PATCH v4] cfi flash: add status polling method for amd flash In-Reply-To: <1269397761-23394-1-git-send-email-thomas@wytron.com.tw> References: <1269314648-6289-1-git-send-email-thomas@wytron.com.tw> <1269397761-23394-1-git-send-email-thomas@wytron.com.tw> Message-ID: <20100325114912.C0E4AE8E722@gemini.denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de Dear Thomas Chou, In message <1269397761-23394-1-git-send-email-thomas@wytron.com.tw> you wrote: > This patch adds status polling method to offer an alternative to > data toggle method for amd flash chips. > > This patch is needed for nios2 cfi flash interface, where the bus > controller performs 4 bytes read cycles for a single byte read > instruction. The data toggle method can not detect chip busy > status correctly. So we have to poll DQ7, which will be inverted > when the chip is busy. > > This feature is enabled with the config def, > CONFIG_SYS_CFI_FLASH_STATUS_POLL > > In flash_erase, the verbose printing of '.' is changed that it will > go with each sector whether successed or failed. Please split this part off into a separate patch. This is a global change to the user interface and must be discussed separately. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de The easiest way to figure the cost of living is to take your income and add ten percent.