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Message-ID: <20230309092254.56279-2-cniedermaier@dh-electronics.com>
Date: Thu, 9 Mar 2023 10:22:53 +0100
From: Christoph Niedermaier <cniedermaier@...electronics.com>
To: <linux-arm-kernel@...ts.infradead.org>
CC: Christoph Niedermaier <cniedermaier@...electronics.com>,
Support Opensource <support.opensource@...semi.com>,
Lee Jones <lee@...nel.org>,
Adam Thomson <Adam.Thomson.Opensource@...semi.com>,
Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>, Marek Vasut <marex@...x.de>,
<kernel@...electronics.com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH V4 2/3] mfd: da9062: Remove IRQ requirement
This patch removes the requirement for an IRQ, because for the core
functionality IRQ isn't needed. So this makes the DA9061/62 chip
usable for designs which haven't connected the IRQ pin.
Signed-off-by: Christoph Niedermaier <cniedermaier@...electronics.com>
Acked-by: Adam Ward <DLG-Adam.Ward.opensource@...renesas.com>
---
Cc: Support Opensource <support.opensource@...semi.com>
Cc: Lee Jones <lee@...nel.org>
Cc: Adam Thomson <Adam.Thomson.Opensource@...semi.com>
Cc: Liam Girdwood <lgirdwood@...il.com>
Cc: Mark Brown <broonie@...nel.org>
Cc: Marek Vasut <marex@...x.de>
Cc: kernel@...electronics.com
Cc: linux-kernel@...r.kernel.org
To: linux-arm-kernel@...ts.infradead.org
---
V2: - Rebase on current next 20230209
- Add Lee Jones to Cc list
V3: - Rebase on current next 20230307
- Use macro MFD_CELL_OF
- Refactoring the code for use without IRQ
V4: - Rebase on current next 20230309
- Add Acked-by tag
---
drivers/mfd/da9062-core.c | 84 +++++++++++++++++++++++++++++++----------------
1 file changed, 55 insertions(+), 29 deletions(-)
diff --git a/drivers/mfd/da9062-core.c b/drivers/mfd/da9062-core.c
index 9418c58c2b06..d073d5f106ec 100644
--- a/drivers/mfd/da9062-core.c
+++ b/drivers/mfd/da9062-core.c
@@ -181,7 +181,7 @@ static const struct resource da9061_onkey_resources[] = {
DEFINE_RES_IRQ_NAMED(DA9061_IRQ_ONKEY, "ONKEY"),
};
-static const struct mfd_cell da9061_devs[] = {
+static const struct mfd_cell da9061_devs_irq[] = {
MFD_CELL_OF("da9061-core", da9061_core_resources, NULL, 0, 0,
NULL),
MFD_CELL_OF("da9062-regulators", da9061_regulators_resources, NULL, 0, 0,
@@ -194,6 +194,14 @@ static const struct mfd_cell da9061_devs[] = {
"dlg,da9061-onkey"),
};
+static const struct mfd_cell da9061_devs_noirq[] = {
+ MFD_CELL_OF("da9061-core", NULL, NULL, 0, 0, NULL),
+ MFD_CELL_OF("da9062-regulators", NULL, NULL, 0, 0, NULL),
+ MFD_CELL_OF("da9061-watchdog", NULL, NULL, 0, 0, "dlg,da9061-watchdog"),
+ MFD_CELL_OF("da9061-thermal", NULL, NULL, 0, 0, "dlg,da9061-thermal"),
+ MFD_CELL_OF("da9061-onkey", NULL, NULL, 0, 0, "dlg,da9061-onkey"),
+};
+
static const struct resource da9062_core_resources[] = {
DEFINE_RES_NAMED(DA9062_IRQ_VDD_WARN, 1, "VDD_WARN", IORESOURCE_IRQ),
};
@@ -227,7 +235,7 @@ static const struct resource da9062_gpio_resources[] = {
DEFINE_RES_NAMED(DA9062_IRQ_GPI4, 1, "GPI4", IORESOURCE_IRQ),
};
-static const struct mfd_cell da9062_devs[] = {
+static const struct mfd_cell da9062_devs_irq[] = {
MFD_CELL_OF("da9062-core", da9062_core_resources, NULL, 0, 0,
NULL),
MFD_CELL_OF("da9062-regulators", da9062_regulators_resources, NULL, 0, 0,
@@ -244,6 +252,16 @@ static const struct mfd_cell da9062_devs[] = {
"dlg,da9062-gpio"),
};
+static const struct mfd_cell da9062_devs_noirq[] = {
+ MFD_CELL_OF("da9062-core", NULL, NULL, 0, 0, NULL),
+ MFD_CELL_OF("da9062-regulators", NULL, NULL, 0, 0, NULL),
+ MFD_CELL_OF("da9062-watchdog", NULL, NULL, 0, 0, "dlg,da9062-watchdog"),
+ MFD_CELL_OF("da9062-thermal", NULL, NULL, 0, 0, "dlg,da9062-thermal"),
+ MFD_CELL_OF("da9062-rtc", NULL, NULL, 0, 0, "dlg,da9062-rtc"),
+ MFD_CELL_OF("da9062-onkey", NULL, NULL, 0, 0, "dlg,da9062-onkey"),
+ MFD_CELL_OF("da9062-gpio", NULL, NULL, 0, 0, "dlg,da9062-gpio"),
+};
+
static int da9062_clear_fault_log(struct da9062 *chip)
{
int ret;
@@ -581,7 +599,7 @@ static int da9062_i2c_probe(struct i2c_client *i2c)
{
const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
struct da9062 *chip;
- unsigned int irq_base;
+ unsigned int irq_base = 0;
const struct mfd_cell *cell;
const struct regmap_irq_chip *irq_chip;
const struct regmap_config *config;
@@ -601,22 +619,16 @@ static int da9062_i2c_probe(struct i2c_client *i2c)
i2c_set_clientdata(i2c, chip);
chip->dev = &i2c->dev;
- if (!i2c->irq) {
- dev_err(chip->dev, "No IRQ configured\n");
- return -EINVAL;
- }
-
+ /* Start with a base configuration without IRQ */
switch (chip->chip_type) {
case COMPAT_TYPE_DA9061:
- cell = da9061_devs;
- cell_num = ARRAY_SIZE(da9061_devs);
- irq_chip = &da9061_irq_chip;
+ cell = da9061_devs_noirq;
+ cell_num = ARRAY_SIZE(da9061_devs_noirq);
config = &da9061_regmap_config;
break;
case COMPAT_TYPE_DA9062:
- cell = da9062_devs;
- cell_num = ARRAY_SIZE(da9062_devs);
- irq_chip = &da9062_irq_chip;
+ cell = da9062_devs_noirq;
+ cell_num = ARRAY_SIZE(da9062_devs_noirq);
config = &da9062_regmap_config;
break;
default:
@@ -651,29 +663,43 @@ static int da9062_i2c_probe(struct i2c_client *i2c)
if (ret)
return ret;
- ret = da9062_configure_irq_type(chip, i2c->irq, &trigger_type);
- if (ret < 0) {
- dev_err(chip->dev, "Failed to configure IRQ type\n");
- return ret;
- }
+ /* If IRQ is available, reconfigure it accordingly */
+ if (i2c->irq) {
+ if (chip->chip_type == COMPAT_TYPE_DA9061) {
+ cell = da9061_devs_irq;
+ cell_num = ARRAY_SIZE(da9061_devs_irq);
+ irq_chip = &da9061_irq_chip;
+ } else {
+ cell = da9062_devs_irq;
+ cell_num = ARRAY_SIZE(da9062_devs_irq);
+ irq_chip = &da9062_irq_chip;
+ }
- ret = regmap_add_irq_chip(chip->regmap, i2c->irq,
- trigger_type | IRQF_SHARED | IRQF_ONESHOT,
- -1, irq_chip, &chip->regmap_irq);
- if (ret) {
- dev_err(chip->dev, "Failed to request IRQ %d: %d\n",
- i2c->irq, ret);
- return ret;
- }
+ ret = da9062_configure_irq_type(chip, i2c->irq, &trigger_type);
+ if (ret < 0) {
+ dev_err(chip->dev, "Failed to configure IRQ type\n");
+ return ret;
+ }
- irq_base = regmap_irq_chip_get_base(chip->regmap_irq);
+ ret = regmap_add_irq_chip(chip->regmap, i2c->irq,
+ trigger_type | IRQF_SHARED | IRQF_ONESHOT,
+ -1, irq_chip, &chip->regmap_irq);
+ if (ret) {
+ dev_err(chip->dev, "Failed to request IRQ %d: %d\n",
+ i2c->irq, ret);
+ return ret;
+ }
+
+ irq_base = regmap_irq_chip_get_base(chip->regmap_irq);
+ }
ret = mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, cell,
cell_num, NULL, irq_base,
NULL);
if (ret) {
dev_err(chip->dev, "Cannot register child devices\n");
- regmap_del_irq_chip(i2c->irq, chip->regmap_irq);
+ if (i2c->irq)
+ regmap_del_irq_chip(i2c->irq, chip->regmap_irq);
return ret;
}
--
2.11.0
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