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Subject[PATCH v2 1/5] spmi: pmic-arb: hardcode IRQ counts
Date
The probing of this driver calls platform_irq_count, which will setup
all of the IRQs that are available. This is a problem since some of
these IRQs may be setup in an IRQ hierarchy later in the boot process
by spmi-gpio. This will cause these hwirqs to be associated with
multiple Linux virqs and interrupts will not work as expected. This
patch changes the pmic-arb driver so that the IRQ counts are hard
coded in the data field of the of_device_id structure so that IRQs
are setup on an as-needed basis.

This patch also removes the generic qcom,spmi-gpio OF match since we
don't know the number of pins. All of the existing upstream bindings
already include the more-specific binding.

Signed-off-by: Brian Masney <masneyb@onstation.org>
---
Note: The qcom,pms405-gpio looks suspicious to me. The existing code
will start at gpio1, which is supposed to be a hole according to the
comment. I can fix this in a later patch if there is a desire. I didn't
do it now to try to keep this series as small as possible. Its no
worse than what was there before.

drivers/pinctrl/qcom/pinctrl-spmi-gpio.c | 37 ++++++++++++------------
1 file changed, 19 insertions(+), 18 deletions(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
index 4458d44dfcf6..d910fa6c49fe 100644
--- a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
+++ b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
@@ -14,6 +14,7 @@
#include <linux/gpio/driver.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/pinctrl/pinconf.h>
@@ -935,8 +936,23 @@ static int pmic_gpio_populate(struct pmic_gpio_state *state,
return 0;
}

+/* data contains the number of GPIOs */
+static const struct of_device_id pmic_gpio_of_match[] = {
+ { .compatible = "qcom,pm8916-gpio", .data = (void *) 4 },
+ { .compatible = "qcom,pm8941-gpio", .data = (void *) 36 },
+ { .compatible = "qcom,pm8994-gpio", .data = (void *) 22 },
+ { .compatible = "qcom,pmi8994-gpio", .data = (void *) 10 },
+ { .compatible = "qcom,pma8084-gpio", .data = (void *) 22 },
+ /* pms405 has 12 GPIOs with holes on 1, 9, and 10 */
+ { .compatible = "qcom,pms405-gpio", .data = (void *) 12 },
+ { },
+};
+
+MODULE_DEVICE_TABLE(of, pmic_gpio_of_match);
+
static int pmic_gpio_probe(struct platform_device *pdev)
{
+ const struct of_device_id *of_id;
struct device *dev = &pdev->dev;
struct pinctrl_pin_desc *pindesc;
struct pinctrl_desc *pctrldesc;
@@ -951,13 +967,11 @@ static int pmic_gpio_probe(struct platform_device *pdev)
return ret;
}

- npins = platform_irq_count(pdev);
- if (!npins)
+ of_id = of_match_device(pmic_gpio_of_match, &pdev->dev);
+ if (!of_id)
return -EINVAL;
- if (npins < 0)
- return npins;

- BUG_ON(npins > ARRAY_SIZE(pmic_gpio_groups));
+ npins = (int) of_id->data;

state = devm_kzalloc(dev, sizeof(*state), GFP_KERNEL);
if (!state)
@@ -1062,19 +1076,6 @@ static int pmic_gpio_remove(struct platform_device *pdev)
return 0;
}

-static const struct of_device_id pmic_gpio_of_match[] = {
- { .compatible = "qcom,pm8916-gpio" }, /* 4 GPIO's */
- { .compatible = "qcom,pm8941-gpio" }, /* 36 GPIO's */
- { .compatible = "qcom,pm8994-gpio" }, /* 22 GPIO's */
- { .compatible = "qcom,pmi8994-gpio" }, /* 10 GPIO's */
- { .compatible = "qcom,pma8084-gpio" }, /* 22 GPIO's */
- { .compatible = "qcom,pms405-gpio" }, /* 12 GPIO's, holes on 1 9 10 */
- { .compatible = "qcom,spmi-gpio" }, /* Generic */
- { },
-};
-
-MODULE_DEVICE_TABLE(of, pmic_gpio_of_match);
-
static struct platform_driver pmic_gpio_driver = {
.driver = {
.name = "qcom-spmi-gpio",
--
2.17.2
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