diff options
Diffstat (limited to 'nuttx/arch/arm/src/lpc17xx/lpc17_sdcard.c')
| -rw-r--r-- | nuttx/arch/arm/src/lpc17xx/lpc17_sdcard.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/nuttx/arch/arm/src/lpc17xx/lpc17_sdcard.c b/nuttx/arch/arm/src/lpc17xx/lpc17_sdcard.c index 2a0e81b27..f52a9a35e 100644 --- a/nuttx/arch/arm/src/lpc17xx/lpc17_sdcard.c +++ b/nuttx/arch/arm/src/lpc17xx/lpc17_sdcard.c @@ -619,8 +619,12 @@ static void lpc17_setpwrctrl(uint32_t pwrctrl) { uint32_t regval; + /* Set the new value of the PWRCTRL field of the PWR register. Also, as a + * side-effect, clear the OPENDRAIN and ROD bits as well. + */ + regval = getreg32(LPC17_SDCARD_PWR); - regval &= ~SDCARD_PWR_CTRL_MASK; + regval &= ~(SDCARD_PWR_CTRL_MASK | SDCARD_PWR_OPENDRAIN | SDCARD_PWR_ROD); regval |= pwrctrl; putreg32(regval, LPC17_SDCARD_PWR); } @@ -643,6 +647,8 @@ static void lpc17_setpwrctrl(uint32_t pwrctrl) static inline uint32_t lpc17_getpwrctrl(void) { + /* Extract and return the PWRCTRL field of the PWR register. */ + return getreg32(LPC17_SDCARD_PWR) & SDCARD_PWR_CTRL_MASK; } |