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author | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2007-11-24 20:14:44 +0100 |
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committer | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2007-11-25 23:28:50 +0100 |
commit | f868cc5a50757d94f36c312395481cb0f187d9e6 (patch) | |
tree | 2a1d082ebcaa05ca9f3c2aebc502a19958005605 /drivers/ds1722.c | |
parent | 16b195c82a18cbfd164800f17a1ef9db2e48331a (diff) | |
download | u-boot-imx-f868cc5a50757d94f36c312395481cb0f187d9e6.zip u-boot-imx-f868cc5a50757d94f36c312395481cb0f187d9e6.tar.gz u-boot-imx-f868cc5a50757d94f36c312395481cb0f187d9e6.tar.bz2 |
drivers/hwmon : move hardware monitor drviers to drivers/hwmon
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Diffstat (limited to 'drivers/ds1722.c')
-rw-r--r-- | drivers/ds1722.c | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/drivers/ds1722.c b/drivers/ds1722.c deleted file mode 100644 index c19ee01..0000000 --- a/drivers/ds1722.c +++ /dev/null @@ -1,142 +0,0 @@ - -#include <common.h> - -#ifdef CONFIG_DS1722 - -#include <ssi.h> - -static void ds1722_select(int dev) -{ - ssi_set_interface(4096, 0, 0, 0); - ssi_chip_select(0); - udelay(1); - ssi_chip_select(dev); - udelay(1); -} - - -u8 ds1722_read(int dev, int addr) -{ - u8 res; - - ds1722_select(dev); - - ssi_tx_byte(addr); - res = ssi_rx_byte(); - - ssi_chip_select(0); - - return res; -} - -void ds1722_write(int dev, int addr, u8 data) -{ - ds1722_select(dev); - - ssi_tx_byte(0x80|addr); - ssi_tx_byte(data); - - ssi_chip_select(0); -} - - -u16 ds1722_temp(int dev, int resolution) -{ - static int useconds[] = { - 75000, 150000, 300000, 600000, 1200000 - }; - char temp; - u16 res; - - - /* set up the desired resulotion ... */ - ds1722_write(dev, 0, 0xe0 | (resolution << 1)); - - /* wait while the chip measures the tremperature */ - udelay(useconds[resolution]); - - res = (temp = ds1722_read(dev, 2)) << 8; - - if (temp < 0) { - temp = (16 - (ds1722_read(dev, 1) >> 4)) & 0x0f; - } else { - temp = (ds1722_read(dev, 1) >> 4); - } - - switch (temp) { - case 0: - /* .0000 */ - break; - case 1: - /* .0625 */ - res |=1; - break; - case 2: - /* .1250 */ - res |=1; - break; - case 3: - /* .1875 */ - res |=2; - break; - case 4: - /* .2500 */ - res |=3; - break; - case 5: - /* .3125 */ - res |=3; - break; - case 6: - /* .3750 */ - res |=4; - break; - case 7: - /* .4375 */ - res |=4; - break; - case 8: - /* .5000 */ - res |=5; - break; - case 9: - /* .5625 */ - res |=6; - break; - case 10: - /* .6250 */ - res |=6; - break; - case 11: - /* .6875 */ - res |=7; - break; - case 12: - /* .7500 */ - res |=8; - break; - case 13: - /* .8125 */ - res |=8; - break; - case 14: - /* .8750 */ - res |=9; - break; - case 15: - /* .9375 */ - res |=9; - break; - } - return res; - -} - -int ds1722_probe(int dev) -{ - u16 temp = ds1722_temp(dev, DS1722_RESOLUTION_12BIT); - printf("%d.%d deg C\n\n", (char)(temp >> 8), temp & 0xff); - return 0; -} - -#endif |