mfd: qcom-pm8xxx: Clean up PM8XXX namespace

The Kconfig and file naming for the PM8xxx driver is totally
confusing:

- Kconfig options MFD_PM8XXX and MFD_PM8921_CORE, some in-kernel
  users depending on or selecting either at random.
- A driver file named pm8921-core.c even if it is indeed
  used by the whole PM8xxx family of chips.
- An irqchip named pm8xxx since it was (I guess) realized that
  the driver was generic for all pm8xxx PMICs.

As I may want to add support for PM8901 this is starting to get
really messy. Fix this situation by:

- Remove the MFD_PM8921_CORE symbol and rely solely on MFD_PM8XXX
  and convert all users, including LEDs Kconfig and ARM defconfigs
  for qcom and multi_v7 to use that single symbol.
- Renaming the driver to qcom-pm8xxx.c to fit along the two
  other qcom* prefixed drivers.
- Rename functions withing the driver from 8921 to 8xxx to
  indicate it is generic.
- Just drop the =m config from the pxa_defconfig, I have no clue
  why it is even there, it is not a Qualcomm platform. (Possibly
  older Kconfig noise from saveconfig.)

Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Gross <andy.gross@linaro.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

arch/arm/configs/multi_v7_defconfig

@@ -489,7 +489,7 @@ CONFIG_MFD_MAX8907=y
 CONFIG_MFD_MAX8997=y
 CONFIG_MFD_MAX8998=y
 CONFIG_MFD_RK808=y
-CONFIG_MFD_PM8921_CORE=y
+CONFIG_MFD_PM8XXX=y
 CONFIG_MFD_QCOM_RPM=y
 CONFIG_MFD_SPMI_PMIC=y
 CONFIG_MFD_SEC_CORE=y

arch/arm/configs/pxa_defconfig

@@ -411,7 +411,6 @@ CONFIG_MFD_MAX77693=y
 CONFIG_MFD_MAX8907=m
 CONFIG_EZX_PCAP=y
 CONFIG_UCB1400_CORE=m
-CONFIG_MFD_PM8921_CORE=m
 CONFIG_MFD_SEC_CORE=y
 CONFIG_MFD_PALMAS=y
 CONFIG_MFD_TPS65090=y

arch/arm/configs/qcom_defconfig

@@ -119,7 +119,6 @@ CONFIG_POWER_RESET=y
 CONFIG_POWER_RESET_MSM=y
 CONFIG_THERMAL=y
 CONFIG_MFD_PM8XXX=y
-CONFIG_MFD_PM8921_CORE=y
 CONFIG_MFD_QCOM_RPM=y
 CONFIG_MFD_SPMI_PMIC=y
 CONFIG_REGULATOR=y

drivers/leds/Kconfig

@@ -645,7 +645,7 @@ config LEDS_VERSATILE
 
 config LEDS_PM8058
 	tristate "LED Support for the Qualcomm PM8058 PMIC"
-	depends on MFD_PM8921_CORE
+	depends on MFD_PM8XXX
 	depends on LEDS_CLASS
 	help
 	  Choose this option if you want to use the LED drivers in

drivers/mfd/Kconfig

@@ -756,24 +756,20 @@ config UCB1400_CORE
 	  module will be called ucb1400_core.
 
 config MFD_PM8XXX
-	tristate
-
-config MFD_PM8921_CORE
-	tristate "Qualcomm PM8921 PMIC chip"
+	tristate "Qualcomm PM8xxx PMIC chips driver"
 	depends on (ARM || HEXAGON)
 	select IRQ_DOMAIN
 	select MFD_CORE
-	select MFD_PM8XXX
 	select REGMAP
 	help
 	  If you say yes to this option, support will be included for the
-	  built-in PM8921 PMIC chip.
+	  built-in PM8xxx PMIC chips.
 
-	  This is required if your board has a PM8921 and uses its features,
+	  This is required if your board has a PM8xxx and uses its features,
 	  such as: MPPs, GPIOs, regulators, interrupts, and PWM.
 
-	  Say M here if you want to include support for PM8921 chip as a module.
-	  This will build a module called "pm8921-core".
+	  Say M here if you want to include support for PM8xxx chips as a
+	  module. This will build a module called "pm8xxx-core".
 
 config MFD_QCOM_RPM
 	tristate "Qualcomm Resource Power Manager (RPM)"

drivers/mfd/Makefile

@@ -172,7 +172,7 @@ obj-$(CONFIG_MFD_SI476X_CORE)	+= si476x-core.o
 
 obj-$(CONFIG_MFD_CS5535)	+= cs5535-mfd.o
 obj-$(CONFIG_MFD_OMAP_USB_HOST)	+= omap-usb-host.o omap-usb-tll.o
-obj-$(CONFIG_MFD_PM8921_CORE) 	+= pm8921-core.o ssbi.o
+obj-$(CONFIG_MFD_PM8XXX) 	+= qcom-pm8xxx.o ssbi.o
 obj-$(CONFIG_MFD_QCOM_RPM)	+= qcom_rpm.o
 obj-$(CONFIG_MFD_SPMI_PMIC)	+= qcom-spmi-pmic.o
 obj-$(CONFIG_TPS65911_COMPARATOR)	+= tps65911-comparator.o

drivers/mfd/qcom-pm8xxx.c

@@ -53,7 +53,7 @@
 #define REG_HWREV		0x002  /* PMIC4 revision */
 #define REG_HWREV_2		0x0E8  /* PMIC4 revision 2 */
 
-#define PM8921_NR_IRQS		256
+#define PM8XXX_NR_IRQS		256
 
 struct pm_irq_chip {
 	struct regmap		*regmap;
@@ -308,22 +308,22 @@ static const struct regmap_config ssbi_regmap_config = {
 	.reg_write = ssbi_reg_write
 };
 
-static const struct of_device_id pm8921_id_table[] = {
+static const struct of_device_id pm8xxx_id_table[] = {
 	{ .compatible = "qcom,pm8018", },
 	{ .compatible = "qcom,pm8058", },
 	{ .compatible = "qcom,pm8921", },
 	{ }
 };
-MODULE_DEVICE_TABLE(of, pm8921_id_table);
+MODULE_DEVICE_TABLE(of, pm8xxx_id_table);
 
-static int pm8921_probe(struct platform_device *pdev)
+static int pm8xxx_probe(struct platform_device *pdev)
 {
 	struct regmap *regmap;
 	int irq, rc;
 	unsigned int val;
 	u32 rev;
 	struct pm_irq_chip *chip;
-	unsigned int nirqs = PM8921_NR_IRQS;
+	unsigned int nirqs = PM8XXX_NR_IRQS;
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0)
@@ -384,46 +384,46 @@ static int pm8921_probe(struct platform_device *pdev)
 	return rc;
 }
 
-static int pm8921_remove_child(struct device *dev, void *unused)
+static int pm8xxx_remove_child(struct device *dev, void *unused)
 {
 	platform_device_unregister(to_platform_device(dev));
 	return 0;
 }
 
-static int pm8921_remove(struct platform_device *pdev)
+static int pm8xxx_remove(struct platform_device *pdev)
 {
 	int irq = platform_get_irq(pdev, 0);
 	struct pm_irq_chip *chip = platform_get_drvdata(pdev);
 
-	device_for_each_child(&pdev->dev, NULL, pm8921_remove_child);
+	device_for_each_child(&pdev->dev, NULL, pm8xxx_remove_child);
 	irq_set_chained_handler_and_data(irq, NULL, NULL);
 	irq_domain_remove(chip->irqdomain);
 
 	return 0;
 }
 
-static struct platform_driver pm8921_driver = {
-	.probe		= pm8921_probe,
-	.remove		= pm8921_remove,
+static struct platform_driver pm8xxx_driver = {
+	.probe		= pm8xxx_probe,
+	.remove		= pm8xxx_remove,
 	.driver		= {
-		.name	= "pm8921-core",
-		.of_match_table = pm8921_id_table,
+		.name	= "pm8xxx-core",
+		.of_match_table = pm8xxx_id_table,
 	},
 };
 
-static int __init pm8921_init(void)
+static int __init pm8xxx_init(void)
 {
-	return platform_driver_register(&pm8921_driver);
+	return platform_driver_register(&pm8xxx_driver);
 }
-subsys_initcall(pm8921_init);
+subsys_initcall(pm8xxx_init);
 
-static void __exit pm8921_exit(void)
+static void __exit pm8xxx_exit(void)
 {
-	platform_driver_unregister(&pm8921_driver);
+	platform_driver_unregister(&pm8xxx_driver);
 }
-module_exit(pm8921_exit);
+module_exit(pm8xxx_exit);
 
 MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("PMIC 8921 core driver");
+MODULE_DESCRIPTION("PMIC 8xxx core driver");
 MODULE_VERSION("1.0");
-MODULE_ALIAS("platform:pm8921-core");
+MODULE_ALIAS("platform:pm8xxx-core");