Use calculations on constants to (slightly) reduce code size
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4077 7fd9a85b-ad96-42d3-883c-3090e2eb8679
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@ -2190,5 +2190,5 @@
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has no value inodes on it.
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* drivers/mtd/at24xx.c: Now supports a configurable block size that
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supports using "clusters" of AT24 pages as blocks. This allows bigger
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block sizes and more efficient use of FLASH when the AT24 is used to
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support a file system (such as NXFFS).
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block sizes and more efficient use of EEPROM when the AT24 is used to
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support a file system (such as NXFFS). (Contributed by Hal Glenn).
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@ -204,8 +204,8 @@ static ssize_t at24c_bread(FAR struct mtd_dev_s *dev, off_t startblock,
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size_t blocksleft;
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#if CONFIG_AT24XX_MTD_BLOCKSIZE > AT24XX_PAGESIZE
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startblock *= CONFIG_AT24XX_MTD_BLOCKSIZE / AT24XX_PAGESIZE;
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nblocks *= CONFIG_AT24XX_MTD_BLOCKSIZE / AT24XX_PAGESIZE;
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startblock *= (CONFIG_AT24XX_MTD_BLOCKSIZE / AT24XX_PAGESIZE);
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nblocks *= (CONFIG_AT24XX_MTD_BLOCKSIZE / AT24XX_PAGESIZE);
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#endif
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blocksleft = nblocks;
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@ -264,8 +264,8 @@ static ssize_t at24c_bwrite(FAR struct mtd_dev_s *dev, off_t startblock, size_t
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uint8_t buf[AT24XX_PAGESIZE+2];
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#if CONFIG_AT24XX_MTD_BLOCKSIZE > AT24XX_PAGESIZE
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startblock *= CONFIG_AT24XX_MTD_BLOCKSIZE / AT24XX_PAGESIZE;
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nblocks *= CONFIG_AT24XX_MTD_BLOCKSIZE / AT24XX_PAGESIZE;
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startblock *= (CONFIG_AT24XX_MTD_BLOCKSIZE / AT24XX_PAGESIZE);
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nblocks *= (CONFIG_AT24XX_MTD_BLOCKSIZE / AT24XX_PAGESIZE);
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#endif
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blocksleft = nblocks;
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@ -302,7 +302,7 @@ static ssize_t at24c_bwrite(FAR struct mtd_dev_s *dev, off_t startblock, size_t
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}
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#if CONFIG_AT24XX_MTD_BLOCKSIZE > AT24XX_PAGESIZE
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return nblocks /(CONFIG_AT24XX_MTD_BLOCKSIZE / AT24XX_PAGESIZE);
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return nblocks / (CONFIG_AT24XX_MTD_BLOCKSIZE / AT24XX_PAGESIZE);
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#else
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return nblocks;
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#endif
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@ -343,13 +343,14 @@ static int at24c_ioctl(FAR struct mtd_dev_s *dev, int cmd, unsigned long arg)
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* It has to be at least as big as the blocksize, bigger serves no
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* purpose.
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* neraseblocks
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* Note that the device size is in kb, so * 1024 / 8 for bytes
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* Note that the device size is in kilobits and must be scaled by
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* 1024 / 8
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*/
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#if CONFIG_AT24XX_MTD_BLOCKSIZE > AT24XX_PAGESIZE
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geo->blocksize = CONFIG_AT24XX_MTD_BLOCKSIZE;
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geo->erasesize = geo->blocksize;
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geo->neraseblocks = CONFIG_AT24XX_SIZE * (1024/8) / geo->erasesize;
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geo->erasesize = CONFIG_AT24XX_MTD_BLOCKSIZE;
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geo->neraseblocks = (CONFIG_AT24XX_SIZE * 1024 / 8) / CONFIG_AT24XX_MTD_BLOCKSIZE;
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#else
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geo->blocksize = priv->pagesize;
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geo->erasesize = priv->pagesize;
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