[PATCH 2/2] mfd: db8500-prcmu: Support platform dependant device selection

[Lee Jones]

The main aim for this cycle is to have the u8540 booting to a
console. However, the u8540 doesn't support all of the u8500
platform devices yet. After this stage is complete we can then
fill in the inadequacies, such as specific clock support at a
later date. To achieve this we're placing devices supported by
all platforms into a common device structure and the remaining
ones into a platform specific one.

Cc: Samuel Ortiz <sameo at linux.intel.com>
Signed-off-by: Lee Jones <lee.jones at linaro.org>
---
 drivers/mfd/db8500-prcmu.c |   52 ++++++++++++++++++++++++++++----------------
 1 file changed, 33 insertions(+), 19 deletions(-)

diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index 1c4edbf8..dec94d0 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -24,6 +24,7 @@
 #include <linux/jiffies.h>
 #include <linux/bitops.h>
 #include <linux/fs.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/uaccess.h>
 #include <linux/irqchip/arm-gic.h>
@@ -3107,19 +3108,7 @@ static struct ux500_wdt_data db8500_wdt_pdata = {
 	.has_28_bits_resolution = true,
 };
 
-static struct mfd_cell db8500_prcmu_devs[] = {
-	{
-		.name = "db8500-prcmu-regulators",
-		.of_compatible = "stericsson,db8500-prcmu-regulator",
-		.platform_data = &db8500_regulators,
-		.pdata_size = sizeof(db8500_regulators),
-	},
-	{
-		.name = "cpufreq-ux500",
-		.of_compatible = "stericsson,cpufreq-ux500",
-		.platform_data = &db8500_cpufreq_table,
-		.pdata_size = sizeof(db8500_cpufreq_table),
-	},
+static struct mfd_cell common_prcmu_devs[] = {
 	{
 		.name = "ux500_wdt",
 		.platform_data = &db8500_wdt_pdata,
@@ -3135,6 +3124,21 @@ static struct mfd_cell db8500_prcmu_devs[] = {
 	},
 };
 
+static struct mfd_cell db8500_prcmu_devs[] = {
+	{
+		.name = "db8500-prcmu-regulators",
+		.of_compatible = "stericsson,db8500-prcmu-regulator",
+		.platform_data = &db8500_regulators,
+		.pdata_size = sizeof(db8500_regulators),
+	},
+	{
+		.name = "cpufreq-ux500",
+		.of_compatible = "stericsson,cpufreq-ux500",
+		.platform_data = &db8500_cpufreq_table,
+		.pdata_size = sizeof(db8500_cpufreq_table),
+	},
+};
+
 static void db8500_prcmu_update_cpufreq(void)
 {
 	if (prcmu_has_arm_maxopp()) {
@@ -3184,10 +3188,10 @@ static int db8500_prcmu_probe(struct platform_device *pdev)
 
 	db8500_irq_init(np);
 
-	for (i = 0; i < ARRAY_SIZE(db8500_prcmu_devs); i++) {
-		if (!strcmp(db8500_prcmu_devs[i].name, "ab8500-core")) {
-			db8500_prcmu_devs[i].platform_data = pdata->ab_platdata;
-			db8500_prcmu_devs[i].pdata_size = sizeof(struct ab8500_platform_data);
+	for (i = 0; i < ARRAY_SIZE(common_prcmu_devs); i++) {
+		if (!strcmp(common_prcmu_devs[i].name, "ab8500-core")) {
+			common_prcmu_devs[i].platform_data = pdata->ab_platdata;
+			common_prcmu_devs[i].pdata_size = sizeof(struct ab8500_platform_data);
 		}
 	}
 
@@ -3195,13 +3199,23 @@ static int db8500_prcmu_probe(struct platform_device *pdev)
 
 	db8500_prcmu_update_cpufreq();
 
-	err = mfd_add_devices(&pdev->dev, 0, db8500_prcmu_devs,
-			      ARRAY_SIZE(db8500_prcmu_devs), NULL, 0, NULL);
+	err = mfd_add_devices(&pdev->dev, 0, common_prcmu_devs,
+			      ARRAY_SIZE(common_prcmu_devs), NULL, 0, NULL);
 	if (err) {
 		pr_err("prcmu: Failed to add subdevices\n");
 		return err;
 	}
 
+	/* TODO: Remove restriction when clk definitions are available. */
+	if (!of_machine_is_compatible("st-ericsson,u8540")) {
+		err = mfd_add_devices(&pdev->dev, 0, db8500_prcmu_devs,
+				      ARRAY_SIZE(db8500_prcmu_devs), NULL, 0, NULL);
+		if (err) {
+			pr_err("prcmu: Failed to add subdevices\n");
+			return err;
+		}
+	}
+
 	pr_info("DB8500 PRCMU initialized\n");
 
 no_irq_return:
-- 
1.7.10.4