On Thu, Nov 26, 2015 at 01:09:50AM +0800, Qipeng Zha wrote: > The equation of offset calculation is not correct for PAD_OWN, > verified this fix will get right offset. > > Signed-off-by: Qi Zheng <[email protected]> > Signed-off-by: Qipeng Zha <[email protected]> > --- > drivers/pinctrl/intel/pinctrl-intel.c | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > > diff --git a/drivers/pinctrl/intel/pinctrl-intel.c > b/drivers/pinctrl/intel/pinctrl-intel.c > index 392e28d..e3f580b 100644 > --- a/drivers/pinctrl/intel/pinctrl-intel.c > +++ b/drivers/pinctrl/intel/pinctrl-intel.c > @@ -37,6 +37,7 @@ > #define PADOWN_BITS 4 > #define PADOWN_SHIFT(p) ((p) % 8 * PADOWN_BITS) > #define PADOWN_MASK(p) (0xf << PADOWN_SHIFT(p)) > +#define PADOWN_GPP(p) ((p) / 8) > > /* Offset from pad_regs */ > #define PADCFG0 0x000 > @@ -142,7 +143,7 @@ static void __iomem *intel_get_padcfg(struct > intel_pinctrl *pctrl, unsigned pin, > static bool intel_pad_owned_by_host(struct intel_pinctrl *pctrl, unsigned > pin) > { > const struct intel_community *community; > - unsigned padno, gpp, gpp_offset, offset; > + unsigned padno, gpp, offset; > void __iomem *padown; > > community = intel_get_community(pctrl, pin); > @@ -152,9 +153,8 @@ static bool intel_pad_owned_by_host(struct intel_pinctrl > *pctrl, unsigned pin) > return true; > > padno = pin_to_padno(community, pin); > - gpp = padno / NPADS_IN_GPP; > - gpp_offset = padno % NPADS_IN_GPP; > - offset = community->padown_offset + gpp * 16 + (gpp_offset / 8) * 4; > + gpp = PADOWN_GPP(padno); > + offset = community->padown_offset + gpp * 4;
Actually have you verified this on Sunrisepoint? If you check the public datasheet (6th Generation Intel Core processor I/O Datasheet vol2) the GPP_B starts from 0x30. First pad in GPP_B is 24 so we get: current code: 0x30 your code: 0x2c So this needs to take the gpp_size in account as well. > padown = community->regs + offset; > > return !(readl(padown) & PADOWN_MASK(padno)); > -- > 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-gpio" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
