ARM: OMAP: SmartReflex: pass device dependent data via platform data

Remove the device dependent code (ex. cpu_is_xxx()) and settings
from the driver code and instead pass them via the platform
data. This allows a clean separation of the driver code and the platform
code, as required by the move of the platform header files to
include/linux/platform_data.

Note about the smartreflex functional clocks: the smartreflex fclks
are derived from sys_clk and have the same name as the main_clk from
the hwmod entry, in order for the SmartReflex driver to request the
fclk (using clk_get(dev, "fck")).
Signed-off-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>

arch/arm/mach-omap2/sr_device.c

@@ -121,6 +121,19 @@ static int __init sr_dev_init(struct omap_hwmod *oh, void *user)
 	sr_data->senn_mod = 0x1;
 	sr_data->senp_mod = 0x1;
 
+	if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
+		sr_data->err_weight = OMAP3430_SR_ERRWEIGHT;
+		sr_data->err_maxlimit = OMAP3430_SR_ERRMAXLIMIT;
+		sr_data->accum_data = OMAP3430_SR_ACCUMDATA;
+		if (!(strcmp(sr_data->name, "smartreflex_mpu"))) {
+			sr_data->senn_avgweight = OMAP3430_SR1_SENNAVGWEIGHT;
+			sr_data->senp_avgweight = OMAP3430_SR1_SENPAVGWEIGHT;
+		} else {
+			sr_data->senn_avgweight = OMAP3430_SR2_SENNAVGWEIGHT;
+			sr_data->senp_avgweight = OMAP3430_SR2_SENPAVGWEIGHT;
+		}
+	}
+
 	sr_data->voltdm = voltdm_lookup(sr_dev_attr->sensor_voltdm_name);
 	if (!sr_data->voltdm) {
 		pr_err("%s: Unable to get voltage domain pointer for VDD %s\n",

drivers/power/avs/smartreflex.c

@@ -130,24 +130,21 @@ static irqreturn_t sr_interrupt(int irq, void *data)
 
 static void sr_set_clk_length(struct omap_sr *sr)
 {
-	struct clk *sys_ck;
-	u32 sys_clk_speed;
+	struct clk *fck;
+	u32 fclk_speed;
 
-	if (cpu_is_omap34xx())
-		sys_ck = clk_get(NULL, "sys_ck");
-	else
-		sys_ck = clk_get(NULL, "sys_clkin_ck");
+	fck = clk_get(&sr->pdev->dev, "fck");
 
-	if (IS_ERR(sys_ck)) {
-		dev_err(&sr->pdev->dev, "%s: unable to get sys clk\n",
-			__func__);
+	if (IS_ERR(fck)) {
+		dev_err(&sr->pdev->dev, "%s: unable to get fck for device %s\n",
+				__func__, dev_name(&sr->pdev->dev));
 		return;
 	}
 
-	sys_clk_speed = clk_get_rate(sys_ck);
-	clk_put(sys_ck);
+	fclk_speed = clk_get_rate(fck);
+	clk_put(fck);
 
-	switch (sys_clk_speed) {
+	switch (fclk_speed) {
 	case 12000000:
 		sr->clk_length = SRCLKLENGTH_12MHZ_SYSCLK;
 		break;
@@ -164,34 +161,12 @@ static void sr_set_clk_length(struct omap_sr *sr)
 		sr->clk_length = SRCLKLENGTH_38MHZ_SYSCLK;
 		break;
 	default:
-		dev_err(&sr->pdev->dev, "%s: Invalid sysclk value: %d\n",
-			__func__, sys_clk_speed);
+		dev_err(&sr->pdev->dev, "%s: Invalid fclk rate: %d\n",
+			__func__, fclk_speed);
 		break;
 	}
 }
 
-static void sr_set_regfields(struct omap_sr *sr)
-{
-	/*
-	 * For time being these values are defined in smartreflex.h
-	 * and populated during init. May be they can be moved to board
-	 * file or pmic specific data structure. In that case these structure
-	 * fields will have to be populated using the pdata or pmic structure.
-	 */
-	if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
-		sr->err_weight = OMAP3430_SR_ERRWEIGHT;
-		sr->err_maxlimit = OMAP3430_SR_ERRMAXLIMIT;
-		sr->accum_data = OMAP3430_SR_ACCUMDATA;
-		if (!(strcmp(sr->name, "smartreflex_mpu_iva"))) {
-			sr->senn_avgweight = OMAP3430_SR1_SENNAVGWEIGHT;
-			sr->senp_avgweight = OMAP3430_SR1_SENPAVGWEIGHT;
-		} else {
-			sr->senn_avgweight = OMAP3430_SR2_SENNAVGWEIGHT;
-			sr->senp_avgweight = OMAP3430_SR2_SENPAVGWEIGHT;
-		}
-	}
-}
-
 static void sr_start_vddautocomp(struct omap_sr *sr)
 {
 	if (!sr_class || !(sr_class->enable) || !(sr_class->configure)) {
@@ -924,8 +899,14 @@ static int __init omap_sr_probe(struct platform_device *pdev)
 	sr_info->nvalue_count = pdata->nvalue_count;
 	sr_info->senn_mod = pdata->senn_mod;
 	sr_info->senp_mod = pdata->senp_mod;
+	sr_info->err_weight = pdata->err_weight;
+	sr_info->err_maxlimit = pdata->err_maxlimit;
+	sr_info->accum_data = pdata->accum_data;
+	sr_info->senn_avgweight = pdata->senn_avgweight;
+	sr_info->senp_avgweight = pdata->senp_avgweight;
 	sr_info->autocomp_active = false;
 	sr_info->ip_type = pdata->ip_type;
+
 	sr_info->base = ioremap(mem->start, resource_size(mem));
 	if (!sr_info->base) {
 		dev_err(&pdev->dev, "%s: ioremap fail\n", __func__);
@@ -937,7 +918,6 @@ static int __init omap_sr_probe(struct platform_device *pdev)
 		sr_info->irq = irq->start;
 
 	sr_set_clk_length(sr_info);
-	sr_set_regfields(sr_info);
 
 	list_add(&sr_info->node, &sr_list);
 

include/linux/power/smartreflex.h

@@ -260,8 +260,13 @@ struct omap_sr_nvalue_table {
  *
  * @name:		instance name
  * @ip_type:		Smartreflex IP type.
- * @senp_mod:		SENPENABLE value for the sr
- * @senn_mod:		SENNENABLE value for sr
+ * @senp_mod:		SENPENABLE value of the sr CONFIG register
+ * @senn_mod:		SENNENABLE value for sr CONFIG register
+ * @err_weight		ERRWEIGHT value of the sr ERRCONFIG register
+ * @err_maxlimit	ERRMAXLIMIT value of the sr ERRCONFIG register
+ * @accum_data		ACCUMDATA value of the sr CONFIG register
+ * @senn_avgweight	SENNAVGWEIGHT value of the sr AVGWEIGHT register
+ * @senp_avgweight	SENPAVGWEIGHT value of the sr AVGWEIGHT register
  * @nvalue_count:	Number of distinct nvalues in the nvalue table
  * @enable_on_init:	whether this sr module needs to enabled at
  *			boot up or not.
@@ -274,6 +279,11 @@ struct omap_sr_data {
 	int				ip_type;
 	u32				senp_mod;
 	u32				senn_mod;
+	u32				err_weight;
+	u32				err_maxlimit;
+	u32				accum_data;
+	u32				senn_avgweight;
+	u32				senp_avgweight;
 	int				nvalue_count;
 	bool				enable_on_init;
 	struct omap_sr_nvalue_table	*nvalue_table;