Merge tag 'for-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply

Pull power supply and reset changes from Sebastian Reichel:
 "Core:
   - Nothing

  Drivers:
   - at91-reset: cleanups, proper handling for sam9x60
   - sc27xx, charger-manager: allow building as module
   - sc27xx: add support to read current charge capacity
   - axp288: more quirks for weird hardware
   - misc fixes"

* tag 'for-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: (26 commits)
  power: reset: sc27xx: Allow the SC27XX poweroff driver building into a module
  power: reset: sc27xx: Change to use cpu_down()
  power: reset: sc27xx: Power off the external subsystems' connection
  power: twl4030: Use scnprintf() for avoiding potential buffer overflow
  power: supply: bq27xxx_battery: Silence deferred-probe error
  power: reset: at91-reset: handle nrst async for sam9x60
  power: reset: at91-reset: get rid of at91_reset_data
  power: reset: at91-reset: keep only one reset function
  power: reset: at91-reset: make at91sam9g45_restart() generic
  power: reset: at91-reset: introduce ramc_lpr to struct at91_reset
  power: reset: at91-reset: use r4 as tmp argument
  power: reset: at91-reset: introduce args member in at91_reset_data
  power: reset: at91-reset: introduce struct at91_reset_data
  power: reset: at91-reset: devm_kzalloc() for at91_reset data structure
  power: reset: at91-reset: pass rstc base address to at91_reset_status()
  power: reset: at91-reset: convert reset in pointer to struct at91_reset
  power: reset: at91-reset: add notifier block to struct at91_reset
  power: reset: at91-reset: add sclk to struct at91_reset
  power: reset: at91-reset: add ramc_base[] to struct at91_reset
  power: reset: at91-reset: introduce struct at91_reset
  ...

11 files changed, 210 insertions, 125 deletions

diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index 513efe8e7628..890380302080 100644
--- a/drivers/power/reset/Kconfig
+++ b/drivers/power/reset/Kconfig
@@ -248,7 +248,7 @@ config SYSCON_REBOOT_MODE
 	  action according to the mode.
 
 config POWER_RESET_SC27XX
-	bool "Spreadtrum SC27xx PMIC power-off driver"
+	tristate "Spreadtrum SC27xx PMIC power-off driver"
 	depends on MFD_SC27XX_PMIC || COMPILE_TEST
 	help
 	  This driver supports powering off a system through
diff --git a/drivers/power/reset/at91-reset.c b/drivers/power/reset/at91-reset.c
index d94e3267c3b6..3ff9d93a5226 100644
--- a/drivers/power/reset/at91-reset.c
+++ b/drivers/power/reset/at91-reset.c
@@ -35,6 +35,7 @@
 
 #define AT91_RSTC_MR	0x08		/* Reset Controller Mode Register */
 #define AT91_RSTC_URSTEN	BIT(0)		/* User Reset Enable */
+#define AT91_RSTC_URSTASYNC	BIT(2)		/* User Reset Asynchronous Control */
 #define AT91_RSTC_URSTIEN	BIT(4)		/* User Reset Interrupt Enable */
 #define AT91_RSTC_ERSTL		GENMASK(11, 8)	/* External Reset Length */
 
@@ -49,105 +50,63 @@ enum reset_type {
 	RESET_TYPE_ULP2		= 8,
 };
 
-static void __iomem *at91_ramc_base[2], *at91_rstc_base;
-static struct clk *sclk;
+struct at91_reset {
+	void __iomem *rstc_base;
+	void __iomem *ramc_base[2];
+	struct clk *sclk;
+	struct notifier_block nb;
+	u32 args;
+	u32 ramc_lpr;
+};
 
 /*
 * unless the SDRAM is cleanly shutdown before we hit the
 * reset register it can be left driving the data bus and
 * killing the chance of a subsequent boot from NAND
 */
-static int at91sam9260_restart(struct notifier_block *this, unsigned long mode,
-			       void *cmd)
+static int at91_reset(struct notifier_block *this, unsigned long mode,
+		      void *cmd)
 {
-	asm volatile(
-		/* Align to cache lines */
-		".balign 32\n\t"
-
-		/* Disable SDRAM accesses */
-		"str	%2, [%0, #" __stringify(AT91_SDRAMC_TR) "]\n\t"
-
-		/* Power down SDRAM */
-		"str	%3, [%0, #" __stringify(AT91_SDRAMC_LPR) "]\n\t"
-
-		/* Reset CPU */
-		"str	%4, [%1, #" __stringify(AT91_RSTC_CR) "]\n\t"
-
-		"b	.\n\t"
-		:
-		: "r" (at91_ramc_base[0]),
-		  "r" (at91_rstc_base),
-		  "r" (1),
-		  "r" cpu_to_le32(AT91_SDRAMC_LPCB_POWER_DOWN),
-		  "r" cpu_to_le32(AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST));
+	struct at91_reset *reset = container_of(this, struct at91_reset, nb);
 
-	return NOTIFY_DONE;
-}
-
-static int at91sam9g45_restart(struct notifier_block *this, unsigned long mode,
-			       void *cmd)
-{
 	asm volatile(
-		/*
-		 * Test wether we have a second RAM controller to care
-		 * about.
-		 *
-		 * First, test that we can dereference the virtual address.
-		 */
-		"cmp	%1, #0\n\t"
-		"beq	1f\n\t"
-
-		/* Then, test that the RAM controller is enabled */
-		"ldr	r0, [%1]\n\t"
-		"cmp	r0, #0\n\t"
-
 		/* Align to cache lines */
 		".balign 32\n\t"
 
 		/* Disable SDRAM0 accesses */
-		"1:	str	%3, [%0, #" __stringify(AT91_DDRSDRC_RTR) "]\n\t"
+		"	tst	%0, #0\n\t"
+		"	beq	1f\n\t"
+		"	str	%3, [%0, #" __stringify(AT91_DDRSDRC_RTR) "]\n\t"
 		/* Power down SDRAM0 */
-		"	str	%4, [%0, #" __stringify(AT91_DDRSDRC_LPR) "]\n\t"
+		"	str	%4, [%0, %6]\n\t"
 		/* Disable SDRAM1 accesses */
+		"1:	tst	%1, #0\n\t"
+		"	beq	2f\n\t"
 		"	strne	%3, [%1, #" __stringify(AT91_DDRSDRC_RTR) "]\n\t"
 		/* Power down SDRAM1 */
-		"	strne	%4, [%1, #" __stringify(AT91_DDRSDRC_LPR) "]\n\t"
+		"	strne	%4, [%1, %6]\n\t"
 		/* Reset CPU */
-		"	str	%5, [%2, #" __stringify(AT91_RSTC_CR) "]\n\t"
+		"2:	str	%5, [%2, #" __stringify(AT91_RSTC_CR) "]\n\t"
 
 		"	b	.\n\t"
 		:
-		: "r" (at91_ramc_base[0]),
-		  "r" (at91_ramc_base[1]),
-		  "r" (at91_rstc_base),
+		: "r" (reset->ramc_base[0]),
+		  "r" (reset->ramc_base[1]),
+		  "r" (reset->rstc_base),
 		  "r" (1),
 		  "r" cpu_to_le32(AT91_DDRSDRC_LPCB_POWER_DOWN),
-		  "r" cpu_to_le32(AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST)
-		: "r0");
-
-	return NOTIFY_DONE;
-}
-
-static int sama5d3_restart(struct notifier_block *this, unsigned long mode,
-			   void *cmd)
-{
-	writel(AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST,
-	       at91_rstc_base);
+		  "r" (reset->args),
+		  "r" (reset->ramc_lpr)
+		: "r4");
 
 	return NOTIFY_DONE;
 }
 
-static int samx7_restart(struct notifier_block *this, unsigned long mode,
-			 void *cmd)
-{
-	writel(AT91_RSTC_KEY | AT91_RSTC_PROCRST, at91_rstc_base);
-	return NOTIFY_DONE;
-}
-
-static void __init at91_reset_status(struct platform_device *pdev)
+static void __init at91_reset_status(struct platform_device *pdev,
+				     void __iomem *base)
 {
 	const char *reason;
-	u32 reg = readl(at91_rstc_base + AT91_RSTC_SR);
+	u32 reg = readl(base + AT91_RSTC_SR);
 
 	switch ((reg & AT91_RSTC_RSTTYP) >> 8) {
 	case RESET_TYPE_GENERAL:
@@ -183,42 +142,68 @@ static void __init at91_reset_status(struct platform_device *pdev)
 }
 
 static const struct of_device_id at91_ramc_of_match[] = {
-	{ .compatible = "atmel,at91sam9260-sdramc", },
-	{ .compatible = "atmel,at91sam9g45-ddramc", },
+	{
+		.compatible = "atmel,at91sam9260-sdramc",
+		.data = (void *)AT91_SDRAMC_LPR,
+	},
+	{
+		.compatible = "atmel,at91sam9g45-ddramc",
+		.data = (void *)AT91_DDRSDRC_LPR,
+	},
 	{ /* sentinel */ }
 };
 
 static const struct of_device_id at91_reset_of_match[] = {
-	{ .compatible = "atmel,at91sam9260-rstc", .data = at91sam9260_restart },
-	{ .compatible = "atmel,at91sam9g45-rstc", .data = at91sam9g45_restart },
-	{ .compatible = "atmel,sama5d3-rstc", .data = sama5d3_restart },
-	{ .compatible = "atmel,samx7-rstc", .data = samx7_restart },
-	{ .compatible = "microchip,sam9x60-rstc", .data = samx7_restart },
+	{
+		.compatible = "atmel,at91sam9260-rstc",
+		.data = (void *)(AT91_RSTC_KEY | AT91_RSTC_PERRST |
+				 AT91_RSTC_PROCRST),
+	},
+	{
+		.compatible = "atmel,at91sam9g45-rstc",
+		.data = (void *)(AT91_RSTC_KEY | AT91_RSTC_PERRST |
+				 AT91_RSTC_PROCRST)
+	},
+	{
+		.compatible = "atmel,sama5d3-rstc",
+		.data = (void *)(AT91_RSTC_KEY | AT91_RSTC_PERRST |
+				 AT91_RSTC_PROCRST)
+	},
+	{
+		.compatible = "atmel,samx7-rstc",
+		.data = (void *)(AT91_RSTC_KEY | AT91_RSTC_PROCRST)
+	},
+	{
+		.compatible = "microchip,sam9x60-rstc",
+		.data = (void *)(AT91_RSTC_KEY | AT91_RSTC_PROCRST)
+	},
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, at91_reset_of_match);
 
-static struct notifier_block at91_restart_nb = {
-	.priority = 192,
-};
-
 static int __init at91_reset_probe(struct platform_device *pdev)
 {
 	const struct of_device_id *match;
+	struct at91_reset *reset;
 	struct device_node *np;
 	int ret, idx = 0;
 
-	at91_rstc_base = of_iomap(pdev->dev.of_node, 0);
-	if (!at91_rstc_base) {
+	reset = devm_kzalloc(&pdev->dev, sizeof(*reset), GFP_KERNEL);
+	if (!reset)
+		return -ENOMEM;
+
+	reset->rstc_base = of_iomap(pdev->dev.of_node, 0);
+	if (!reset->rstc_base) {
 		dev_err(&pdev->dev, "Could not map reset controller address\n");
 		return -ENODEV;
 	}
 
 	if (!of_device_is_compatible(pdev->dev.of_node, "atmel,sama5d3-rstc")) {
 		/* we need to shutdown the ddr controller, so get ramc base */
-		for_each_matching_node(np, at91_ramc_of_match) {
-			at91_ramc_base[idx] = of_iomap(np, 0);
-			if (!at91_ramc_base[idx]) {
+		for_each_matching_node_and_match(np, at91_ramc_of_match, &match) {
+			reset->ramc_lpr = (u32)match->data;
+			reset->ramc_base[idx] = of_iomap(np, 0);
+			if (!reset->ramc_base[idx]) {
 				dev_err(&pdev->dev, "Could not map ram controller address\n");
 				of_node_put(np);
 				return -ENODEV;
@@ -228,33 +213,46 @@ static int __init at91_reset_probe(struct platform_device *pdev)
 	}
 
 	match = of_match_node(at91_reset_of_match, pdev->dev.of_node);
-	at91_restart_nb.notifier_call = match->data;
+	reset->nb.notifier_call = at91_reset;
+	reset->nb.priority = 192;
+	reset->args = (u32)match->data;
 
-	sclk = devm_clk_get(&pdev->dev, NULL);
-	if (IS_ERR(sclk))
-		return PTR_ERR(sclk);
+	reset->sclk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(reset->sclk))
+		return PTR_ERR(reset->sclk);
 
-	ret = clk_prepare_enable(sclk);
+	ret = clk_prepare_enable(reset->sclk);
 	if (ret) {
 		dev_err(&pdev->dev, "Could not enable slow clock\n");
 		return ret;
 	}
 
-	ret = register_restart_handler(&at91_restart_nb);
+	platform_set_drvdata(pdev, reset);
+
+	if (of_device_is_compatible(pdev->dev.of_node, "microchip,sam9x60-rstc")) {
+		u32 val = readl(reset->rstc_base + AT91_RSTC_MR);
+
+		writel(AT91_RSTC_KEY | AT91_RSTC_URSTASYNC | val,
+		       reset->rstc_base + AT91_RSTC_MR);
+	}
+
+	ret = register_restart_handler(&reset->nb);
 	if (ret) {
-		clk_disable_unprepare(sclk);
+		clk_disable_unprepare(reset->sclk);
 		return ret;
 	}
 
-	at91_reset_status(pdev);
+	at91_reset_status(pdev, reset->rstc_base);
 
 	return 0;
 }
 
 static int __exit at91_reset_remove(struct platform_device *pdev)
 {
-	unregister_restart_handler(&at91_restart_nb);
-	clk_disable_unprepare(sclk);
+	struct at91_reset *reset = platform_get_drvdata(pdev);
+
+	unregister_restart_handler(&reset->nb);
+	clk_disable_unprepare(reset->sclk);
 
 	return 0;
 }
diff --git a/drivers/power/reset/sc27xx-poweroff.c b/drivers/power/reset/sc27xx-poweroff.c
index 29fb08b8faa0..90287c31992c 100644
--- a/drivers/power/reset/sc27xx-poweroff.c
+++ b/drivers/power/reset/sc27xx-poweroff.c
@@ -6,6 +6,7 @@
 
 #include <linux/cpu.h>
 #include <linux/kernel.h>
+#include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
 #include <linux/regmap.h>
@@ -13,6 +14,8 @@
 
 #define SC27XX_PWR_PD_HW	0xc2c
 #define SC27XX_PWR_OFF_EN	BIT(0)
+#define SC27XX_SLP_CTRL		0xdf0
+#define SC27XX_LDO_XTL_EN	BIT(3)
 
 static struct regmap *regmap;
 
@@ -27,10 +30,13 @@ static struct regmap *regmap;
  */
 static void sc27xx_poweroff_shutdown(void)
 {
-#ifdef CONFIG_PM_SLEEP_SMP
-	int cpu = smp_processor_id();
+#ifdef CONFIG_HOTPLUG_CPU
+	int cpu;
 
-	freeze_secondary_cpus(cpu);
+	for_each_online_cpu(cpu) {
+		if (cpu != smp_processor_id())
+			remove_cpu(cpu);
+	}
 #endif
 }
 
@@ -40,6 +46,9 @@ static struct syscore_ops poweroff_syscore_ops = {
 
 static void sc27xx_poweroff_do_poweroff(void)
 {
+	/* Disable the external subsys connection's power firstly */
+	regmap_write(regmap, SC27XX_SLP_CTRL, SC27XX_LDO_XTL_EN);
+
 	regmap_write(regmap, SC27XX_PWR_PD_HW, SC27XX_PWR_OFF_EN);
 }
 
@@ -63,4 +72,8 @@ static struct platform_driver sc27xx_poweroff_driver = {
 		.name = "sc27xx-poweroff",
 	},
 };
-builtin_platform_driver(sc27xx_poweroff_driver);
+module_platform_driver(sc27xx_poweroff_driver);
+
+MODULE_DESCRIPTION("Power off driver for SC27XX PMIC Device");
+MODULE_AUTHOR("Baolin Wang <baolin.wang@unisoc.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 9a5591ab90d0..195bc0462d3e 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -480,7 +480,7 @@ config CHARGER_GPIO
 	  called gpio-charger.
 
 config CHARGER_MANAGER
-	bool "Battery charger manager for multiple chargers"
+	tristate "Battery charger manager for multiple chargers"
 	depends on REGULATOR
 	select EXTCON
 	help
diff --git a/drivers/power/supply/ab8500_charger.c b/drivers/power/supply/ab8500_charger.c
index f69550d64f09..9469fe182d02 100644
--- a/drivers/power/supply/ab8500_charger.c
+++ b/drivers/power/supply/ab8500_charger.c
@@ -404,7 +404,7 @@ disable_otp:
 }
 
 /**
- * ab8500_power_supply_changed - a wrapper with local extentions for
+ * ab8500_power_supply_changed - a wrapper with local extensions for
  * power_supply_changed
  * @di:	  pointer to the ab8500_charger structure
  * @psy:  pointer to power_supply_that have changed.
@@ -683,7 +683,7 @@ static int ab8500_charger_max_usb_curr(struct ab8500_charger *di,
 	/*
 	 * Platform only supports USB 2.0.
 	 * This means that charging current from USB source
-	 * is maximum 500 mA. Every occurence of USB_STAT_*_HOST_*
+	 * is maximum 500 mA. Every occurrence of USB_STAT_*_HOST_*
 	 * should set USB_CH_IP_CUR_LVL_0P5.
 	 */
 
@@ -1379,13 +1379,13 @@ static int ab8500_charger_ac_en(struct ux500_charger *charger,
 
 		/*
 		 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
-		 * will be triggered everytime we enable the VDD ADC supply.
+		 * will be triggered every time we enable the VDD ADC supply.
 		 * This will turn off charging for a short while.
 		 * It can be avoided by having the supply on when
 		 * there is a charger enabled. Normally the VDD ADC supply
-		 * is enabled everytime a GPADC conversion is triggered. We will
-		 * force it to be enabled from this driver to have
-		 * the GPADC module independant of the AB8500 chargers
+		 * is enabled every time a GPADC conversion is triggered.
+		 * We will force it to be enabled from this driver to have
+		 * the GPADC module independent of the AB8500 chargers
 		 */
 		if (!di->vddadc_en_ac) {
 			ret = regulator_enable(di->regu);
@@ -1455,7 +1455,7 @@ static int ab8500_charger_ac_en(struct ux500_charger *charger,
 		if (is_ab8500_1p1_or_earlier(di->parent)) {
 			/*
 			 * For ABB revision 1.0 and 1.1 there is a bug in the
-			 * watchdog logic. That means we have to continously
+			 * watchdog logic. That means we have to continuously
 			 * kick the charger watchdog even when no charger is
 			 * connected. This is only valid once the AC charger
 			 * has been enabled. This is a bug that is not handled
@@ -1552,13 +1552,13 @@ static int ab8500_charger_usb_en(struct ux500_charger *charger,
 
 		/*
 		 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
-		 * will be triggered everytime we enable the VDD ADC supply.
+		 * will be triggered every time we enable the VDD ADC supply.
 		 * This will turn off charging for a short while.
 		 * It can be avoided by having the supply on when
 		 * there is a charger enabled. Normally the VDD ADC supply
-		 * is enabled everytime a GPADC conversion is triggered. We will
-		 * force it to be enabled from this driver to have
-		 * the GPADC module independant of the AB8500 chargers
+		 * is enabled every time a GPADC conversion is triggered.
+		 * We will force it to be enabled from this driver to have
+		 * the GPADC module independent of the AB8500 chargers
 		 */
 		if (!di->vddadc_en_usb) {
 			ret = regulator_enable(di->regu);
@@ -1582,7 +1582,10 @@ static int ab8500_charger_usb_en(struct ux500_charger *charger,
 			return -ENXIO;
 		}
 
-		/* ChVoltLevel: max voltage upto which battery can be charged */
+		/*
+		 * ChVoltLevel: max voltage up to which battery can be
+		 * charged
+		 */
 		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
 			AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
 		if (ret) {
@@ -2014,7 +2017,7 @@ static void ab8500_charger_check_hw_failure_work(struct work_struct *work)
  * Work queue function for kicking the charger watchdog.
  *
  * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
- * logic. That means we have to continously kick the charger
+ * logic. That means we have to continuously kick the charger
  * watchdog even when no charger is connected. This is only
  * valid once the AC charger has been enabled. This is
  * a bug that is not handled by the algorithm and the
@@ -2262,7 +2265,7 @@ static void ab8500_charger_usb_link_status_work(struct work_struct *work)
 	 * Some chargers that breaks the USB spec is
 	 * identified as invalid by AB8500 and it refuse
 	 * to start the charging process. but by jumping
-	 * thru a few hoops it can be forced to start.
+	 * through a few hoops it can be forced to start.
 	 */
 	if (is_ab8500(di->parent))
 		ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
@@ -3214,7 +3217,7 @@ static int ab8500_charger_resume(struct platform_device *pdev)
 
 	/*
 	 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
-	 * logic. That means we have to continously kick the charger
+	 * logic. That means we have to continuously kick the charger
 	 * watchdog even when no charger is connected. This is only
 	 * valid once the AC charger has been enabled. This is
 	 * a bug that is not handled by the algorithm and the
@@ -3483,7 +3486,7 @@ static int ab8500_charger_probe(struct platform_device *pdev)
 
 	/*
 	 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
-	 * logic. That means we have to continously kick the charger
+	 * logic. That means we have to continuously kick the charger
 	 * watchdog even when no charger is connected. This is only
 	 * valid once the AC charger has been enabled. This is
 	 * a bug that is not handled by the algorithm and the
diff --git a/drivers/power/supply/axp288_charger.c b/drivers/power/supply/axp288_charger.c
index 1bbba6bba673..cf4c67b2d235 100644
--- a/drivers/power/supply/axp288_charger.c
+++ b/drivers/power/supply/axp288_charger.c
@@ -21,6 +21,7 @@
 #include <linux/property.h>
 #include <linux/mfd/axp20x.h>
 #include <linux/extcon.h>
+#include <linux/dmi.h>
 
 #define PS_STAT_VBUS_TRIGGER		BIT(0)
 #define PS_STAT_BAT_CHRG_DIR		BIT(2)
@@ -545,6 +546,49 @@ out:
 	return IRQ_HANDLED;
 }
 
+/*
+ * The HP Pavilion x2 10 series comes in a number of variants:
+ * Bay Trail SoC    + AXP288 PMIC, DMI_BOARD_NAME: "815D"
+ * Cherry Trail SoC + AXP288 PMIC, DMI_BOARD_NAME: "813E"
+ * Cherry Trail SoC + TI PMIC,     DMI_BOARD_NAME: "827C" or "82F4"
+ *
+ * The variants with the AXP288 PMIC are all kinds of special:
+ *
+ * 1. All variants use a Type-C connector which the AXP288 does not support, so
+ * when using a Type-C charger it is not recognized. Unlike most AXP288 devices,
+ * this model actually has mostly working ACPI AC / Battery code, the ACPI code
+ * "solves" this by simply setting the input_current_limit to 3A.
+ * There are still some issues with the ACPI code, so we use this native driver,
+ * and to solve the charging not working (500mA is not enough) issue we hardcode
+ * the 3A input_current_limit like the ACPI code does.
+ *
+ * 2. If no charger is connected the machine boots with the vbus-path disabled.
+ * Normally this is done when a 5V boost converter is active to avoid the PMIC
+ * trying to charge from the 5V boost converter's output. This is done when
+ * an OTG host cable is inserted and the ID pin on the micro-B receptacle is
+ * pulled low and the ID pin has an ACPI event handler associated with it
+ * which re-enables the vbus-path when the ID pin is pulled high when the
+ * OTG host cable is removed. The Type-C connector has no ID pin, there is
+ * no ID pin handler and there appears to be no 5V boost converter, so we
+ * end up not charging because the vbus-path is disabled, until we unplug
+ * the charger which automatically clears the vbus-path disable bit and then
+ * on the second plug-in of the adapter we start charging. To solve the not
+ * charging on first charger plugin we unconditionally enable the vbus-path at
+ * probe on this model, which is safe since there is no 5V boost converter.
+ */
+static const struct dmi_system_id axp288_hp_x2_dmi_ids[] = {
+	{
+		/*
+		 * Bay Trail model has "Hewlett-Packard" as sys_vendor, Cherry
+		 * Trail model has "HP", so we only match on product_name.
+		 */
+		.matches = {
+			DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"),
+		},
+	},
+	{} /* Terminating entry */
+};
+
 static void axp288_charger_extcon_evt_worker(struct work_struct *work)
 {
 	struct axp288_chrg_info *info =
@@ -568,7 +612,11 @@ static void axp288_charger_extcon_evt_worker(struct work_struct *work)
 	}
 
 	/* Determine cable/charger type */
-	if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) {
+	if (dmi_check_system(axp288_hp_x2_dmi_ids)) {
+		/* See comment above axp288_hp_x2_dmi_ids declaration */
+		dev_dbg(&info->pdev->dev, "HP X2 with Type-C, setting inlmt to 3A\n");
+		current_limit = 3000000;
+	} else if (extcon_get_state(edev, EXTCON_CHG_USB_SDP) > 0) {
 		dev_dbg(&info->pdev->dev, "USB SDP charger is connected\n");
 		current_limit = 500000;
 	} else if (extcon_get_state(edev, EXTCON_CHG_USB_CDP) > 0) {
@@ -685,6 +733,13 @@ static int charger_init_hw_regs(struct axp288_chrg_info *info)
 		return ret;
 	}
 
+	if (dmi_check_system(axp288_hp_x2_dmi_ids)) {
+		/* See comment above axp288_hp_x2_dmi_ids declaration */
+		ret = axp288_charger_vbus_path_select(info, true);
+		if (ret < 0)
+			return ret;
+	}
+
 	/* Read current charge voltage and current limit */
 	ret = regmap_read(info->regmap, AXP20X_CHRG_CTRL1, &val);
 	if (ret < 0) {
diff --git a/drivers/power/supply/axp288_fuel_gauge.c b/drivers/power/supply/axp288_fuel_gauge.c
index e1bc4e6e6f30..f40fa0e63b6e 100644
--- a/drivers/power/supply/axp288_fuel_gauge.c
+++ b/drivers/power/supply/axp288_fuel_gauge.c
@@ -706,14 +706,14 @@ static const struct dmi_system_id axp288_fuel_gauge_blacklist[] = {
 	{
 		/* Intel Cherry Trail Compute Stick, Windows version */
 		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
+			DMI_MATCH(DMI_SYS_VENDOR, "Intel"),
 			DMI_MATCH(DMI_PRODUCT_NAME, "STK1AW32SC"),
 		},
 	},
 	{
 		/* Intel Cherry Trail Compute Stick, version without an OS */
 		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "Intel Corporation"),
+			DMI_MATCH(DMI_SYS_VENDOR, "Intel"),
 			DMI_MATCH(DMI_PRODUCT_NAME, "STK1A32SC"),
 		},
 	},
diff --git a/drivers/power/supply/bq27xxx_battery.c b/drivers/power/supply/bq27xxx_battery.c
index 195c18c2f426..664e50103eaa 100644
--- a/drivers/power/supply/bq27xxx_battery.c
+++ b/drivers/power/supply/bq27xxx_battery.c
@@ -1885,7 +1885,10 @@ int bq27xxx_battery_setup(struct bq27xxx_device_info *di)
 
 	di->bat = power_supply_register_no_ws(di->dev, psy_desc, &psy_cfg);
 	if (IS_ERR(di->bat)) {
-		dev_err(di->dev, "failed to register battery\n");
+		if (PTR_ERR(di->bat) == -EPROBE_DEFER)
+			dev_dbg(di->dev, "failed to register battery, deferring probe\n");
+		else
+			dev_err(di->dev, "failed to register battery\n");
 		return PTR_ERR(di->bat);
 	}
 
diff --git a/drivers/power/supply/ingenic-battery.c b/drivers/power/supply/ingenic-battery.c
index 2748715c4c75..dd3d93dfe3eb 100644
--- a/drivers/power/supply/ingenic-battery.c
+++ b/drivers/power/supply/ingenic-battery.c
@@ -148,7 +148,8 @@ static int ingenic_battery_probe(struct platform_device *pdev)
 
 	bat->battery = devm_power_supply_register(dev, desc, &psy_cfg);
 	if (IS_ERR(bat->battery)) {
-		dev_err(dev, "Unable to register battery\n");
+		if (PTR_ERR(bat->battery) != -EPROBE_DEFER)
+			dev_err(dev, "Unable to register battery\n");
 		return PTR_ERR(bat->battery);
 	}
 
diff --git a/drivers/power/supply/sc27xx_fuel_gauge.c b/drivers/power/supply/sc27xx_fuel_gauge.c
index 469c83fdaa8e..a7c8a8453db1 100644
--- a/drivers/power/supply/sc27xx_fuel_gauge.c
+++ b/drivers/power/supply/sc27xx_fuel_gauge.c
@@ -614,6 +614,17 @@ static int sc27xx_fgu_get_property(struct power_supply *psy,
 		val->intval = data->total_cap * 1000;
 		break;
 
+	case POWER_SUPPLY_PROP_CHARGE_NOW:
+		ret = sc27xx_fgu_get_clbcnt(data, &value);
+		if (ret)
+			goto error;
+
+		value = DIV_ROUND_CLOSEST(value * 10,
+					  36 * SC27XX_FGU_SAMPLE_HZ);
+		val->intval = sc27xx_fgu_adc_to_current(data, value);
+
+		break;
+
 	default:
 		ret = -EINVAL;
 		break;
@@ -682,6 +693,7 @@ static enum power_supply_property sc27xx_fgu_props[] = {
 	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
 	POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
 	POWER_SUPPLY_PROP_CALIBRATE,
+	POWER_SUPPLY_PROP_CHARGE_NOW
 };
 
 static const struct power_supply_desc sc27xx_fgu_desc = {
diff --git a/drivers/power/supply/twl4030_charger.c b/drivers/power/supply/twl4030_charger.c
index 648ab80288c9..1bc49b2e12e8 100644
--- a/drivers/power/supply/twl4030_charger.c
+++ b/drivers/power/supply/twl4030_charger.c
@@ -726,10 +726,10 @@ twl4030_bci_mode_show(struct device *dev,
 
 	for (i = 0; i < ARRAY_SIZE(modes); i++)
 		if (mode == i)
-			len += snprintf(buf+len, PAGE_SIZE-len,
+			len += scnprintf(buf+len, PAGE_SIZE-len,
 					"[%s] ", modes[i]);
 		else
-			len += snprintf(buf+len, PAGE_SIZE-len,
+			len += scnprintf(buf+len, PAGE_SIZE-len,
 					"%s ", modes[i]);
 	buf[len-1] = '\n';
 	return len;