Merge tag 'staging-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging/IIO updates from Greg KH:
 "Here is the big staging and IIO driver update for 4.18-rc1.

  It was delayed as I wanted to make sure the final driver deletions did
  not cause any major merge issues, and all now looks good.

  There are a lot of patches here, just over 1000. The diffstat summary
  shows the major changes here:

	1007 files changed, 16828 insertions(+), 227770 deletions(-)

  Because of this, we might be close to shrinking the overall kernel
  source code size for two releases in a row.

  There was loads of work in this release cycle, primarily:

   - tons of ks7010 driver cleanups

   - lots of mt7621 driver fixes and cleanups

   - most driver cleanups

   - wilc1000 fixes and cleanups

   - lots and lots of IIO driver cleanups and new additions

   - debugfs cleanups for all staging drivers

   - lots of other staging driver cleanups and fixes, the shortlog has
     the full details.

  but the big user-visable things here are the removal of 3 chunks of
  code:

   - ncpfs and ipx were removed on schedule, no one has cared about this
     code since it moved to staging last year, and if it needs to come
     back, it can be reverted.

   - lustre file system is removed.

     I've ranted at the lustre developers about once a year for the past
     5 years, with no real forward progress at all to clean things up
     and get the code into the "real" part of the kernel.

     Given that the lustre developers continue to work on an external
     tree and try to port those changes to the in-kernel tree every once
     in a while, this whole thing really really is not working out at
     all. So I'm deleting it so that the developers can spend the time
     working in their out-of-tree location and get things cleaned up
     properly to get merged into the tree correctly at a later date.

  Because of these file removals, you will have merge issues on some of
  these files (2 in the ipx code, 1 in the ncpfs code, and 1 in the
  atomisp driver). Just delete those files, it's a simple merge :)

  All of this has been in linux-next for a while with no reported
  problems"

* tag 'staging-4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (1011 commits)
  staging: ipx: delete it from the tree
  ncpfs: remove uapi .h files
  ncpfs: remove Documentation
  ncpfs: remove compat functionality
  staging: ncpfs: delete it
  staging: lustre: delete the filesystem from the tree.
  staging: vc04_services: no need to save the log debufs dentries
  staging: vc04_services: vchiq_debugfs_log_entry can be a void *
  staging: vc04_services: remove struct vchiq_debugfs_info
  staging: vc04_services: move client dbg directory into static variable
  staging: vc04_services: remove odd vchiq_debugfs_top() wrapper
  staging: vc04_services: no need to check debugfs return values
  staging: mt7621-gpio: reorder includes alphabetically
  staging: mt7621-gpio: change gc_map to don't use pointers
  staging: mt7621-gpio: use GPIOF_DIR_OUT and GPIOF_DIR_IN macros instead of custom values
  staging: mt7621-gpio: change 'to_mediatek_gpio' to make just a one line return
  staging: mt7621-gpio: dt-bindings: update documentation for #interrupt-cells property
  staging: mt7621-gpio: update #interrupt-cells for the gpio node
  staging: mt7621-gpio: dt-bindings: complete documentation for the gpio
  staging: mt7621-dts: add missing properties to gpio node
  ...

1 files changed, 48 insertions, 18 deletions

diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
index 40be7d9fadbf..ca432e7b6ff1 100644
--- a/drivers/iio/adc/stm32-adc-core.c
+++ b/drivers/iio/adc/stm32-adc-core.c
@@ -34,9 +34,6 @@
 #define STM32F4_ADC_ADCPRE_SHIFT	16
 #define STM32F4_ADC_ADCPRE_MASK		GENMASK(17, 16)
 
-/* STM32 F4 maximum analog clock rate (from datasheet) */
-#define STM32F4_ADC_MAX_CLK_RATE	36000000
-
 /* STM32H7 - common registers for all ADC instances */
 #define STM32H7_ADC_CSR			(STM32_ADCX_COMN_OFFSET + 0x00)
 #define STM32H7_ADC_CCR			(STM32_ADCX_COMN_OFFSET + 0x08)
@@ -51,9 +48,6 @@
 #define STM32H7_CKMODE_SHIFT		16
 #define STM32H7_CKMODE_MASK		GENMASK(17, 16)
 
-/* STM32 H7 maximum analog clock rate (from datasheet) */
-#define STM32H7_ADC_MAX_CLK_RATE	36000000
-
 /**
  * stm32_adc_common_regs - stm32 common registers, compatible dependent data
  * @csr:	common status register offset
@@ -74,15 +68,17 @@ struct stm32_adc_priv;
  * stm32_adc_priv_cfg - stm32 core compatible configuration data
  * @regs:	common registers for all instances
  * @clk_sel:	clock selection routine
+ * @max_clk_rate_hz: maximum analog clock rate (Hz, from datasheet)
  */
 struct stm32_adc_priv_cfg {
 	const struct stm32_adc_common_regs *regs;
 	int (*clk_sel)(struct platform_device *, struct stm32_adc_priv *);
+	u32 max_clk_rate_hz;
 };
 
 /**
  * struct stm32_adc_priv - stm32 ADC core private data
- * @irq:		irq for ADC block
+ * @irq:		irq(s) for ADC block
  * @domain:		irq domain reference
  * @aclk:		clock reference for the analog circuitry
  * @bclk:		bus clock common for all ADCs, depends on part used
@@ -91,7 +87,7 @@ struct stm32_adc_priv_cfg {
  * @common:		common data for all ADC instances
  */
 struct stm32_adc_priv {
-	int				irq;
+	int				irq[STM32_ADC_MAX_ADCS];
 	struct irq_domain		*domain;
 	struct clk			*aclk;
 	struct clk			*bclk;
@@ -133,7 +129,7 @@ static int stm32f4_adc_clk_sel(struct platform_device *pdev,
 	}
 
 	for (i = 0; i < ARRAY_SIZE(stm32f4_pclk_div); i++) {
-		if ((rate / stm32f4_pclk_div[i]) <= STM32F4_ADC_MAX_CLK_RATE)
+		if ((rate / stm32f4_pclk_div[i]) <= priv->cfg->max_clk_rate_hz)
 			break;
 	}
 	if (i >= ARRAY_SIZE(stm32f4_pclk_div)) {
@@ -222,7 +218,7 @@ static int stm32h7_adc_clk_sel(struct platform_device *pdev,
 			if (ckmode)
 				continue;
 
-			if ((rate / div) <= STM32H7_ADC_MAX_CLK_RATE)
+			if ((rate / div) <= priv->cfg->max_clk_rate_hz)
 				goto out;
 		}
 	}
@@ -242,7 +238,7 @@ static int stm32h7_adc_clk_sel(struct platform_device *pdev,
 		if (!ckmode)
 			continue;
 
-		if ((rate / div) <= STM32H7_ADC_MAX_CLK_RATE)
+		if ((rate / div) <= priv->cfg->max_clk_rate_hz)
 			goto out;
 	}
 
@@ -328,11 +324,24 @@ static int stm32_adc_irq_probe(struct platform_device *pdev,
 			       struct stm32_adc_priv *priv)
 {
 	struct device_node *np = pdev->dev.of_node;
+	unsigned int i;
+
+	for (i = 0; i < STM32_ADC_MAX_ADCS; i++) {
+		priv->irq[i] = platform_get_irq(pdev, i);
+		if (priv->irq[i] < 0) {
+			/*
+			 * At least one interrupt must be provided, make others
+			 * optional:
+			 * - stm32f4/h7 shares a common interrupt.
+			 * - stm32mp1, has one line per ADC (either for ADC1,
+			 *   ADC2 or both).
+			 */
+			if (i && priv->irq[i] == -ENXIO)
+				continue;
+			dev_err(&pdev->dev, "failed to get irq\n");
 
-	priv->irq = platform_get_irq(pdev, 0);
-	if (priv->irq < 0) {
-		dev_err(&pdev->dev, "failed to get irq\n");
-		return priv->irq;
+			return priv->irq[i];
+		}
 	}
 
 	priv->domain = irq_domain_add_simple(np, STM32_ADC_MAX_ADCS, 0,
@@ -343,8 +352,12 @@ static int stm32_adc_irq_probe(struct platform_device *pdev,
 		return -ENOMEM;
 	}
 
-	irq_set_chained_handler(priv->irq, stm32_adc_irq_handler);
-	irq_set_handler_data(priv->irq, priv);
+	for (i = 0; i < STM32_ADC_MAX_ADCS; i++) {
+		if (priv->irq[i] < 0)
+			continue;
+		irq_set_chained_handler(priv->irq[i], stm32_adc_irq_handler);
+		irq_set_handler_data(priv->irq[i], priv);
+	}
 
 	return 0;
 }
@@ -353,11 +366,17 @@ static void stm32_adc_irq_remove(struct platform_device *pdev,
 				 struct stm32_adc_priv *priv)
 {
 	int hwirq;
+	unsigned int i;
 
 	for (hwirq = 0; hwirq < STM32_ADC_MAX_ADCS; hwirq++)
 		irq_dispose_mapping(irq_find_mapping(priv->domain, hwirq));
 	irq_domain_remove(priv->domain);
-	irq_set_chained_handler(priv->irq, NULL);
+
+	for (i = 0; i < STM32_ADC_MAX_ADCS; i++) {
+		if (priv->irq[i] < 0)
+			continue;
+		irq_set_chained_handler(priv->irq[i], NULL);
+	}
 }
 
 static int stm32_adc_probe(struct platform_device *pdev)
@@ -497,11 +516,19 @@ static int stm32_adc_remove(struct platform_device *pdev)
 static const struct stm32_adc_priv_cfg stm32f4_adc_priv_cfg = {
 	.regs = &stm32f4_adc_common_regs,
 	.clk_sel = stm32f4_adc_clk_sel,
+	.max_clk_rate_hz = 36000000,
 };
 
 static const struct stm32_adc_priv_cfg stm32h7_adc_priv_cfg = {
 	.regs = &stm32h7_adc_common_regs,
 	.clk_sel = stm32h7_adc_clk_sel,
+	.max_clk_rate_hz = 36000000,
+};
+
+static const struct stm32_adc_priv_cfg stm32mp1_adc_priv_cfg = {
+	.regs = &stm32h7_adc_common_regs,
+	.clk_sel = stm32h7_adc_clk_sel,
+	.max_clk_rate_hz = 40000000,
 };
 
 static const struct of_device_id stm32_adc_of_match[] = {
@@ -512,6 +539,9 @@ static const struct of_device_id stm32_adc_of_match[] = {
 		.compatible = "st,stm32h7-adc-core",
 		.data = (void *)&stm32h7_adc_priv_cfg
 	}, {
+		.compatible = "st,stm32mp1-adc-core",
+		.data = (void *)&stm32mp1_adc_priv_cfg
+	}, {
 	},
 };
 MODULE_DEVICE_TABLE(of, stm32_adc_of_match);