This is a note to let you know that I've just added the patch titled
iio: adc: stm32-adc: fix a wrong error message when probing
to my staging git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git
in the staging-testing branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will be merged to the staging-next branch sometime soon,
after it passes testing, and the merge window is open.
If you have any questions about this process, please let me know.
>From 10134ec3f8cefa6a40fe84987f1795e9e0da9715 Mon Sep 17 00:00:00 2001
From: Fabrice Gasnier <fabrice.gasnier@xxxxxx>
Date: Tue, 12 May 2020 15:27:05 +0200
Subject: iio: adc: stm32-adc: fix a wrong error message when probing
interrupts
A wrong error message is printed out currently, like on STM32MP15:
- stm32-adc-core 48003000.adc: IRQ index 2 not found.
This is seen since commit 7723f4c5ecdb ("driver core: platform: Add an
error message to platform_get_irq*()").
The STM32 ADC core driver wrongly requests up to 3 interrupt lines. It
should request only the necessary IRQs, based on the compatible:
- stm32f4/h7 ADCs share a common interrupt
- stm32mp1, has one interrupt line per ADC.
So add the number of required interrupts to the compatible data.
Fixes: d58c67d1d851 ("iio: adc: stm32-adc: add support for STM32MP1")
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@xxxxxx>
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
---
drivers/iio/adc/stm32-adc-core.c | 34 +++++++++++++-------------------
1 file changed, 14 insertions(+), 20 deletions(-)
diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
index 2df88d2b880a..0e2068ec068b 100644
--- a/drivers/iio/adc/stm32-adc-core.c
+++ b/drivers/iio/adc/stm32-adc-core.c
@@ -65,12 +65,14 @@ struct stm32_adc_priv;
* @clk_sel: clock selection routine
* @max_clk_rate_hz: maximum analog clock rate (Hz, from datasheet)
* @has_syscfg: SYSCFG capability flags
+ * @num_irqs: number of interrupt lines
*/
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;
unsigned int has_syscfg;
+ unsigned int num_irqs;
};
/**
@@ -375,21 +377,15 @@ static int stm32_adc_irq_probe(struct platform_device *pdev,
struct device_node *np = pdev->dev.of_node;
unsigned int i;
- for (i = 0; i < STM32_ADC_MAX_ADCS; i++) {
+ /*
+ * Interrupt(s) must be provided, depending on the compatible:
+ * - stm32f4/h7 shares a common interrupt line.
+ * - stm32mp1, has one line per ADC
+ */
+ for (i = 0; i < priv->cfg->num_irqs; 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;
-
+ if (priv->irq[i] < 0)
return priv->irq[i];
- }
}
priv->domain = irq_domain_add_simple(np, STM32_ADC_MAX_ADCS, 0,
@@ -400,9 +396,7 @@ static int stm32_adc_irq_probe(struct platform_device *pdev,
return -ENOMEM;
}
- for (i = 0; i < STM32_ADC_MAX_ADCS; i++) {
- if (priv->irq[i] < 0)
- continue;
+ for (i = 0; i < priv->cfg->num_irqs; i++) {
irq_set_chained_handler(priv->irq[i], stm32_adc_irq_handler);
irq_set_handler_data(priv->irq[i], priv);
}
@@ -420,11 +414,8 @@ static void stm32_adc_irq_remove(struct platform_device *pdev,
irq_dispose_mapping(irq_find_mapping(priv->domain, hwirq));
irq_domain_remove(priv->domain);
- for (i = 0; i < STM32_ADC_MAX_ADCS; i++) {
- if (priv->irq[i] < 0)
- continue;
+ for (i = 0; i < priv->cfg->num_irqs; i++)
irq_set_chained_handler(priv->irq[i], NULL);
- }
}
static int stm32_adc_core_switches_supply_en(struct stm32_adc_priv *priv,
@@ -817,6 +808,7 @@ 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,
+ .num_irqs = 1,
};
static const struct stm32_adc_priv_cfg stm32h7_adc_priv_cfg = {
@@ -824,6 +816,7 @@ static const struct stm32_adc_priv_cfg stm32h7_adc_priv_cfg = {
.clk_sel = stm32h7_adc_clk_sel,
.max_clk_rate_hz = 36000000,
.has_syscfg = HAS_VBOOSTER,
+ .num_irqs = 1,
};
static const struct stm32_adc_priv_cfg stm32mp1_adc_priv_cfg = {
@@ -831,6 +824,7 @@ static const struct stm32_adc_priv_cfg stm32mp1_adc_priv_cfg = {
.clk_sel = stm32h7_adc_clk_sel,
.max_clk_rate_hz = 40000000,
.has_syscfg = HAS_VBOOSTER | HAS_ANASWVDD,
+ .num_irqs = 2,
};
static const struct of_device_id stm32_adc_of_match[] = {
--
2.26.2
