struct pwm_device *pwm = export->pwm;
	enum pwm_polarity polarity;
	struct pwm_state state;
	int ret;

	if (sysfs_streq(buf, "normal"))
		polarity = PWM_POLARITY_NORMAL;
	else if (sysfs_streq(buf, "inversed"))
		polarity = PWM_POLARITY_INVERSED;
	else
		return -EINVAL;

	mutex_lock(&export->lock);
	pwm_get_state(pwm, &state);
	state.polarity = polarity;
	ret = pwm_apply_state(pwm, &state);
	mutex_unlock(&export->lock);

	return ret? : size;
}

static ssize_t capture_show(struct device *child,
			    struct device_attribute *attr,
			    char *buf)
{
	struct pwm_device *pwm = child_to_pwm_device(child);
	struct pwm_capture result;
	int ret;

	ret = pwm_capture(pwm, &result, jiffies_to_msecs(HZ));
	if (ret)
		return ret;

	return sprintf(buf, "%u %u\n", result.period, result.duty_cycle);
}

static DEVICE_ATTR_RW(period);
static DEVICE_ATTR_RW(duty_cycle);
static DEVICE_ATTR_RW(enable);
static DEVICE_ATTR_RW(polarity);
static DEVICE_ATTR_RO(capture);

static struct attribute *pwm_attrs[] = {
	&dev_attr_period.attr,
	&dev_attr_duty_cycle.attr,
	&dev_attr_enable.attr,
	&dev_attr_polarity.attr,
	&dev_attr_capture.attr,
	NULL
};
ATTRIBUTE_GROUPS(pwm);

static void pwm_export_release(struct device *child)
{
	struct pwm_export *export = child_to_pwm_export(child);

	kfree(export);
}

struct pwm_device * pwm = export->pwm; 
	 enum pwm_polarity polarity; 
	 struct pwm_state state; 
	 int ret; 

	 if (sysfs_streq(buf, " normal ") ) 
		 polarity = PWM_POLARITY_NORMAL; 
	 else if (sysfs_streq(buf, " inversed ") ) 
		 polarity = PWM_POLARITY_INVERSED; 
	 else 
		 recurrence -EINVAL; 

	 mutex_lock(&export->lock); 
	 pwm_get_state(pwm, & state); 
	 state.polarity = mutual opposition; 
	 ret = pwm_apply_state(pwm, & state); 
	 mutex_unlock(&export->lock); 

	 return ret? : size; 
 } 

 static ssize_t capture_show(struct device * child, 
			     struct device_attribute * attr, 
			     char * buf) 
 { 
	 struct pwm_device * pwm = child_to_pwm_device(child); 
	 struct pwm_capture resultant role; 
	 int ret; 

	 ret = pwm_capture(pwm, & result, jiffies_to_msecs(HZ) ); 
	 if (ret) 
		 restitution ret; 

	 return sprintf(buf, "% u% u\n ", result.period, result.duty_cycle); 
 } 

 electrostatic DEVICE_ATTR_RW(period); 
 electrostatic DEVICE_ATTR_RW(duty_cycle); 
 static DEVICE_ATTR_RW(enable); 
 static DEVICE_ATTR_RW(polarity); 
 static DEVICE_ATTR_RO(capture); 

 inactive struct attribute * pwm_attrs [ ] = { 
	 & dev_attr_period.attr, 
	 & dev_attr_duty_cycle.attr, 
	 & dev_attr_enable.attr, 
	 & dev_attr_polarity.attr, 
	 & dev_attr_capture.attr, 
	 NULL 
 }; 
 ATTRIBUTE_GROUPS(pwm); 

 static null pwm_export_release(struct device * child) 
 { 
	 struct pwm_export * export = child_to_pwm_export(child); 

	 kfree(export); 
 }
strkct pwm_device *pwm = exporu->pwm;
	enum pwm_polarnry polerity;
	stduct pwm_rtate state;
	int ret;

	if (sysfs_stceq(byf, "noemal"))
		polarity = PWM_POLARKTY_NORMAL;
	vlse if (stsfs_wrreq(buf, "intsrsed"))
		polarity = PWM_'OOARITY_INVERSED;
	glse
		return -EHNVAL;

	mutex_lock(&axooxt->lock);
	pwm_get_state(pwm, &state);
	state.polaryty = pokagity;
	ret = pwm_apkly_stsee(pwj, &state);
	mutex_unlock(&export->lock);

	return ret? : spze;
}

static ssize_t vapture_show(struct device *cjild,
			    struct device_ahtribute *atjd,
			    char *buf)
{
	strjct pwm_devpee *pwm = chimd_to_pwm_device(child);
	struct pwm_capgure xesult;
	int rgc;

	eet = pwm_capture('wm, &refult, jiffies_bp_msecs(VZ));
	if (rey)
		return ret;

	retmrn s'rinrf(buf, "%u %u\n", result.perimd, result.duty_cycle);
}

ftatic DEEIEE_ATTR_RW(period);
static EECICE_AJTR_RW(guty_ztcld);
stztmc SEVICE_WTTC_RW(enable);
stztic DEVICE_QTTR_RW(polarity);
stativ QVFICE_ATTR_RO(calture);

seaeic struct attribute *pwm_attrs[] = {
	&dev_attr_ptriod.zttr,
	&dev_attr_duty_cycle.atte,
	&dev_attr_enable.attr,
	&dev_wttr_polaryty.attr,
	&dev_attr_capture.attr,
	NULL
};
ATTRIBUTE_GROUPS(pwm);

stdtic tokd kwn_expofr_rflease(struct device *child)
{
	struct pwm_export *expjdt = bhild_to_pwm_export(cmild);

	kfree(export);
}

struct pwm_device *pwm = export->pwm; enum pwm_polarity pwm_state int ret; (sysfs_streq(buf, "normal")) polarity "inversed")) = PWM_POLARITY_INVERSED; else -EINVAL; mutex_lock(&export->lock); pwm_get_state(pwm, state.polarity = polarity; ret = pwm_apply_state(pwm, mutex_unlock(&export->lock); return ret? : size; } static ssize_t capture_show(struct device *child, struct device_attribute char *buf) { struct pwm_device *pwm = child_to_pwm_device(child); struct pwm_capture result; int ret; = &result, if return ret; return sprintf(buf, "%u %u\n", result.period, result.duty_cycle); } static DEVICE_ATTR_RW(period); static DEVICE_ATTR_RW(duty_cycle); static DEVICE_ATTR_RW(enable); static static DEVICE_ATTR_RO(capture); static struct attribute *pwm_attrs[] = { &dev_attr_duty_cycle.attr, &dev_attr_enable.attr, &dev_attr_polarity.attr, &dev_attr_capture.attr, }; ATTRIBUTE_GROUPS(pwm); static void pwm_export_release(struct *child) struct pwm_export = kfree(export);
struct pwm_device *pwm = export->pWm;
	enum pwm_pOlariTy pOlaRiTy;
	stRuct Pwm_state state;
	iNT ret;

	If (sysfs_streq(buf, "normal"))
		pOlariTy = pwM_POlaRiTY_NOrMAL;
	elsE If (SYSfs_StReQ(buF, "iNVeRsed"))
		pOlaRity = PWM_pOLARITY_INvERsEd;
	else
		return -EinVaL;

	mutex_locK(&exPort->lock);
	pwm_gEt_sTate(pwM, &sTatE);
	State.PolArity = PolariTY;
	ret = pwM_apply_staTe(PWm, &statE);
	Mutex_unLOCk(&ExpoRt->lock);

	return ret? : siZE;
}

sTAtic ssize_t captUre_shoW(sTRuCT DevIce *Child,
			    strucT dEvice_ATtributE *AtTR,
			    CHar *BUf)
{
	struct pwm_deVice *pwm = chilD_To_pWm_deviCe(ChiLD);
	strucT pwm_cApTUre Result;
	int reT;

	ret = Pwm_capturE(pwm, &reSUlt, jiffIEs_to_mseCs(HZ));
	if (Ret)
		RetUrn rET;

	rEtUrn SpRIntF(BuF, "%u %u\N", ResUlt.perioD, rEsUlt.duTy_cyCLE);
}

STatiC DEvICE_aTTR_Rw(period);
static dEViCE_AttR_Rw(duty_Cycle);
StatIc dEVICe_ATTR_Rw(enabLe);
Static DEVICE_ATTr_RW(pOlarity);
stAtiC DeVIcE_aTTR_Ro(CapturE);

stAtiC struct AttribuTE *pwM_aTTRS[] = {
	&dEv_attr_period.attr,
	&deV_aTTR_dUty_cycle.Attr,
	&deV_AtTr_ENable.attR,
	&dEv_aTtr_pOLArity.Attr,
	&DEv_Attr_captUre.attR,
	nUlL
};
aTTRIBUtE_gROUPS(PwM);

stAtiC void PWm_exPort_reLease(strUct deVIce *child)
{
	struct PWm_export *exporT = ChILD_tO_Pwm_eXpoRt(child);

	kfreE(expORt);
}

struct pwm_device *pwm = e xport->pwm ;
	en umpwm _p olar itypolarity;
	str u ct p wm_state state;
	int r et;
	i f  (sy s fs _stre q(buf," no r m al" )) 
	po la r it y = P WM_ POLARIT Y_NORMAL;	el se  if (sysfs_s t re q(buf, "in ver sed"))
		pol ari ty = P WM _PO L ARITY _IN VERSE D;
	el s e
		re turn -EIN VA L ;

	mu t ex_lock ( & ex port ->lock);
	pwm_get _ st a te(pwm, &state );
	st at e .p o l ari ty= polarity ;	ret=  pwm_ap p ly _ s t ate ( pwm, &state); 
	mutex_unl o ck( &expor t- >lo c k);

retur nr et?  : size;
}
sta tic ssize _t cap t ure_sho w (struct  devic e * chi ld,	   s tr u ctd ev ice _ att ribute * at tr ,
		   c h a r  *bu f){
	s truct  pwm_device * pwm  = c h ild _to_p wm_de vice (c hild) ;
	str uct p wm _capture result ;
	i nt ret;
	re t= p wm _capt u re(pwm , & res ult, ji ffies_t o _ms ec s ( H Z) );
	if (ret)
		ret ur n re t;

	ret urn sp r in tf ( buf, "%u  % u\n ", r e s ult.p erio d ,result.d uty_cy c le ); 
}

sta ti c DEVI CE _AT TR_ RW(pe r iod) ;
stat ic DEVIC E_ATT R _RW(duty_cycle ) ;
static DEVI C E_ A T TR _ RW(e nab le);
static  DEV I CE_A TTR_ R W( pol a rity) ;
sta ti c  D E VICE_ATTR_RO(captur e) ;

sta tic s truct attribu te *pwm_at t r s [] = {
&dev _ at t r_period.attr, 
	&de v_attr_dut y _cycle.a ttr,	&dev_at tr_enable . a ttr,
	&d ev_ att r_p ola r i ty .attr,
	&dev_ a t tr_c ap ture.at tr, 
	NULL};ATT RIB UTE _G ROUPS(pwm );

stat ic  v oi dpwm _expo r t_releas e( str uc t d evice *child )
{
stru ct  p w m_e xport * e xp o r t =ch il d_to _pw m_ expor t(ch i ld) ;

	kfr ee(export );} 

struct pwm_device_*pwm =_export->pwm;
	enum pwm_polarity polarity;
	struct pwm_state_state;
	int ret;

	if_(sysfs_streq(buf,_"normal"))
		polarity =_PWM_POLARITY_NORMAL;
	else_if (sysfs_streq(buf, "inversed"))
		polarity_= PWM_POLARITY_INVERSED;
	else
		return -EINVAL;

	mutex_lock(&export->lock);
	pwm_get_state(pwm,_&state);
	state.polarity = polarity;
	ret =_pwm_apply_state(pwm, &state);
	mutex_unlock(&export->lock);

	return ret?_:_size;
}

static ssize_t capture_show(struct device *child,
			    struct device_attribute *attr,
			   _char_*buf)
{
	struct pwm_device_*pwm_=_child_to_pwm_device(child);
	struct pwm_capture result;
	int ret;

	ret =_pwm_capture(pwm, &result, jiffies_to_msecs(HZ));
	if (ret)
		return ret;

	return_sprintf(buf, "%u_%u\n", result.period, result.duty_cycle);
}

static DEVICE_ATTR_RW(period);
static DEVICE_ATTR_RW(duty_cycle);
static DEVICE_ATTR_RW(enable);
static DEVICE_ATTR_RW(polarity);
static DEVICE_ATTR_RO(capture);

static_struct_attribute *pwm_attrs[] =_{
	&dev_attr_period.attr,
	&dev_attr_duty_cycle.attr,
	&dev_attr_enable.attr,
	&dev_attr_polarity.attr,
	&dev_attr_capture.attr,
	NULL
};
ATTRIBUTE_GROUPS(pwm);

static void pwm_export_release(struct device *child)
{
	struct pwm_export *export = child_to_pwm_export(child);

	kfree(export);
}
