Merge tag 'mfd-for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd

Pull MFD updates from Lee Jones:
 "New Drivers:
   - Add new driver for MAXIM MAX77620/MAX20024 PMIC
   - Add new driver for Hisilicon HI665X PMIC

  New Device Support:
   - Add support for AXP809 in axp20x-rsb
   - Add support for Power Supply in axp20x

  New core features:
   - devm_mfd_* managed resources

  Fix-ups:
   - Remove unused code (da9063-irq, wm8400-core, tps6105x,
     smsc-ece1099, twl4030-power)
   - Improve clean-up in error path (intel_quark_i2c_gpio)
   - Explicitly include headers (syscon.h)
   - Allow building as modules (max77693)
   - Use IS_ENABLED() instead of rolling your own (dm355evm_msp,
     wm8400-core)
   - DT adaptions (axp20x, hi655x, arizona, max77620)
   - Remove CLK_IS_ROOT flag (intel-lpss, intel_quark)
   - Move to gpiochip API (asic3, dm355evm_msp, htc-egpio, htc-i2cpld,
     sm501, tc6393xb, tps65010, ucb1x00, vexpress)
   - Make use of devm_mfd_* calls (act8945a, as3711, atmel-hlcdc,
     bcm590xx, hi6421-pmic-core, lp3943, menf21bmc, mt6397, rdc321x,
     rk808, rn5t618, rt5033, sky81452, stw481x, tps6507x, tps65217,
     wm8400)

  Bug Fixes"
   - Fix ACPI child matching (mfd-core)
   - Fix start-up ordering issues (mt6397-core, arizona-core)
   - Fix forgotten register state on resume (intel-lpss)
   - Fix Clock related issues (twl6040)
   - Fix scheduling whilst atomic (omap-usb-tll)
   - Kconfig changes (vexpress)"

* tag 'mfd-for-linus-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (73 commits)
  mfd: hi655x: Add MFD driver for hi655x
  mfd: ab8500-debugfs: Trivial fix of spelling mistake on "between"
  mfd: vexpress: Add !ARCH_USES_GETTIMEOFFSET dependency
  mfd: Add device-tree binding doc for PMIC MAX77620/MAX20024
  mfd: max77620: Add core driver for MAX77620/MAX20024
  mfd: arizona: Add defines for GPSW values that can be used from DT
  mfd: omap-usb-tll: Fix scheduling while atomic BUG
  mfd: wm5110: ARIZONA_CLOCK_CONTROL should be volatile
  mfd: axp20x: Add a cell for the ac power_supply part of the axp20x PMICs
  mfd: intel_soc_pmic_core: Terminate panel control GPIO lookup table correctly
  mfd: wl1273-core: Use devm_mfd_add_devices() for mfd_device registration
  mfd: tps65910: Use devm_mfd_add_devices and devm_regmap_add_irq_chip
  mfd: sec: Use devm_mfd_add_devices and devm_regmap_add_irq_chip
  mfd: rc5t583: Use devm_mfd_add_devices and devm_request_threaded_irq
  mfd: max77686: Use devm_mfd_add_devices and devm_regmap_add_irq_chip
  mfd: as3722: Use devm_mfd_add_devices and devm_regmap_add_irq_chip
  mfd: twl4030-power: Remove driver path in file comment
  MAINTAINERS: Add entry for X-Powers AXP family PMIC drivers
  mfd: smsc-ece1099: Remove unnecessarily remove callback
  mfd: Use IS_ENABLED(CONFIG_FOO) instead of checking FOO || FOO_MODULE
  ...

drivers/mfd/intel-lpss.c

@@ -34,6 +34,7 @@
 #define LPSS_DEV_SIZE		0x200
 #define LPSS_PRIV_OFFSET	0x200
 #define LPSS_PRIV_SIZE		0x100
+#define LPSS_PRIV_REG_COUNT	(LPSS_PRIV_SIZE / 4)
 #define LPSS_IDMA64_OFFSET	0x800
 #define LPSS_IDMA64_SIZE	0x800
 
@@ -76,6 +77,7 @@ struct intel_lpss {
 	struct mfd_cell *cell;
 	struct device *dev;
 	void __iomem *priv;
+	u32 priv_ctx[LPSS_PRIV_REG_COUNT];
 	int devid;
 	u32 caps;
 	u32 active_ltr;
@@ -336,8 +338,8 @@ static int intel_lpss_register_clock(struct intel_lpss *lpss)
 		return 0;
 
 	/* Root clock */
-	clk = clk_register_fixed_rate(NULL, dev_name(lpss->dev), NULL,
-				      CLK_IS_ROOT, lpss->info->clk_rate);
+	clk = clk_register_fixed_rate(NULL, dev_name(lpss->dev), NULL, 0,
+				      lpss->info->clk_rate);
 	if (IS_ERR(clk))
 		return PTR_ERR(clk);
 
@@ -493,6 +495,16 @@ EXPORT_SYMBOL_GPL(intel_lpss_prepare);
 
 int intel_lpss_suspend(struct device *dev)
 {
+	struct intel_lpss *lpss = dev_get_drvdata(dev);
+	unsigned int i;
+
+	/* Save device context */
+	for (i = 0; i < LPSS_PRIV_REG_COUNT; i++)
+		lpss->priv_ctx[i] = readl(lpss->priv + i * 4);
+
+	/* Put the device into reset state */
+	writel(0, lpss->priv + LPSS_PRIV_RESETS);
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(intel_lpss_suspend);
@@ -500,8 +512,13 @@ EXPORT_SYMBOL_GPL(intel_lpss_suspend);
 int intel_lpss_resume(struct device *dev)
 {
 	struct intel_lpss *lpss = dev_get_drvdata(dev);
+	unsigned int i;
 
-	intel_lpss_init_dev(lpss);
+	intel_lpss_deassert_reset(lpss);
+
+	/* Restore device context */
+	for (i = 0; i < LPSS_PRIV_REG_COUNT; i++)
+		writel(lpss->priv_ctx[i], lpss->priv + i * 4);
 
 	return 0;
 }