PM / AVS: SmartReflex: use omap_sr * for enable/disable interface

SmartReflex driver interface is natively divided to two parts:

- external SmartReflex interface
- interface between SmartReflex driver and SmartReflex Class

Functions which belong to AVS class interface can use
struct omap_sr* instead of struct voltatedomain*, to provide a
direct connection between SR driver and SR class. This allows
us to optimize and not do additional lookups where none is
required.

sr_enable() and sr_disable() are interface functions between
SR driver and SR class. They are typically used by Class driver
to enable/disable SmartReflex hardware module.
Now they take struct omap_sr* as input parameter.

Signed-off-by: Andrii Tseglytskyi <[e-mail]>
Acked-by: Nishanth Menon <[e-mail]>
Signed-off-by: Kevin Hilman <[e-mail]>

arch/arm/mach-omap2/smartreflex-class3.c

···
 	}
 
 	omap_vp_enable(sr->voltdm);
-	return sr_enable(sr->voltdm, volt);
+	return sr_enable(sr, volt);
 }
 
 static int sr_class3_disable(struct omap_sr *sr, int is_volt_reset)
 {
 	sr_disable_errgen(sr);
 	omap_vp_disable(sr->voltdm);
-	sr_disable(sr->voltdm);
+	sr_disable(sr);
 	if (is_volt_reset)
 		voltdm_reset(sr->voltdm);
 

drivers/power/avs/smartreflex.c

···
 
 /**
  * sr_enable() - Enables the smartreflex module.
- * @voltdm:	VDD pointer to which the SR module to be configured belongs to.
+ * @sr:		pointer to which the SR module to be configured belongs to.
  * @volt:	The voltage at which the Voltage domain associated with
  *		the smartreflex module is operating at.
  *		This is required only to program the correct Ntarget value.
···
  * enable a smartreflex module. Returns 0 on success. Returns error
  * value if the voltage passed is wrong or if ntarget value is wrong.
  */
-int sr_enable(struct voltagedomain *voltdm, unsigned long volt)
+int sr_enable(struct omap_sr *sr, unsigned long volt)
 {
 	struct omap_volt_data *volt_data;
-	struct omap_sr *sr = _sr_lookup(voltdm);
 	struct omap_sr_nvalue_table *nvalue_row;
 	int ret;
 
-	if (IS_ERR(sr)) {
-		pr_warning("%s: omap_sr struct for voltdm not found\n",	__func__);
-		return PTR_ERR(sr);
+	if (!sr) {
+		pr_warn("%s: NULL omap_sr from %pF\n", __func__,
+			(void *)_RET_IP_);
+		return -EINVAL;
 	}
 
 	volt_data = omap_voltage_get_voltdata(sr->voltdm, volt);
···
 
 /**
  * sr_disable() - Disables the smartreflex module.
- * @voltdm:	VDD pointer to which the SR module to be configured belongs to.
+ * @sr:		pointer to which the SR module to be configured belongs to.
  *
  * This API is to be called from the smartreflex class driver to
  * disable a smartreflex module.
  */
-void sr_disable(struct voltagedomain *voltdm)
+void sr_disable(struct omap_sr *sr)
 {
-	struct omap_sr *sr = _sr_lookup(voltdm);
-
-	if (IS_ERR(sr)) {
-		pr_warning("%s: omap_sr struct for voltdm not found\n",	__func__);
+	if (!sr) {
+		pr_warn("%s: NULL omap_sr from %pF\n", __func__,
+			(void *)_RET_IP_);
 		return;
 	}
 

include/linux/power/smartreflex.h

···
 void omap_sr_register_pmic(struct omap_sr_pmic_data *pmic_data);
 
 /* Smartreflex driver hooks to be called from Smartreflex class driver */
-int sr_enable(struct voltagedomain *voltdm, unsigned long volt);
-void sr_disable(struct voltagedomain *voltdm);
+int sr_enable(struct omap_sr *sr, unsigned long volt);
+void sr_disable(struct omap_sr *sr);
 int sr_configure_errgen(struct omap_sr *sr);
 int sr_disable_errgen(struct omap_sr *sr);
 int sr_configure_minmax(struct omap_sr *sr);