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Subject[PATCH v8 07/14] staging: hikey9xx: hi6421-spmi-pmic: cleanup IRQ handling code
Date
- Use BIT() and GENMASK();
- Remove duplicated mask definitions;
- Simplify the code under IRQ handler;
- Add a few extra blank lines to make easier to see
spin_lock/spin_unlock;
- Remove debug code;
- Fix a few minor coding style issues.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
drivers/staging/hikey9xx/hi6421-spmi-pmic.c | 66 +++++++++------------
1 file changed, 28 insertions(+), 38 deletions(-)

diff --git a/drivers/staging/hikey9xx/hi6421-spmi-pmic.c b/drivers/staging/hikey9xx/hi6421-spmi-pmic.c
index 48e4f92f7d1e..f2af1760add9 100644
--- a/drivers/staging/hikey9xx/hi6421-spmi-pmic.c
+++ b/drivers/staging/hikey9xx/hi6421-spmi-pmic.c
@@ -7,6 +7,7 @@
//
// Copyright (c) 2020-2021 Huawei Technologies Co., Ltd

+#include <linux/bitops.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/mfd/core.h>
@@ -34,25 +35,19 @@ enum hi6421_spmi_pmic_irq_list {
SIM1_HPD_F,
PMIC_IRQ_LIST_MAX,
};
-/* 8-bit register offset in PMIC */
-#define HISI_MASK_STATE 0xff

#define HISI_IRQ_ARRAY 2
#define HISI_IRQ_NUM (HISI_IRQ_ARRAY * 8)
+#define HISI_IRQ_MASK GENMASK(1, 0)

#define SOC_PMIC_IRQ_MASK_0_ADDR 0x0202
#define SOC_PMIC_IRQ0_ADDR 0x0212

#define HISI_IRQ_KEY_NUM 0
-#define HISI_IRQ_KEY_VALUE 0xc0
-#define HISI_IRQ_KEY_DOWN 7
-#define HISI_IRQ_KEY_UP 6

-#define HISI_MASK_FIELD 0xFF
#define HISI_BITS 8
-
-/*define the first group interrupt register number*/
-#define HISI_PMIC_FIRST_GROUP_INT_NUM 2
+#define HISI_IRQ_KEY_VALUE (BIT(POWERKEY_DOWN) | BIT(POWERKEY_UP))
+#define HISI_MASK GENMASK(HISI_BITS - 1, 0)

static const struct mfd_cell hi6421v600_devs[] = {
{ .name = "hi6421v600-regulator", },
@@ -62,31 +57,26 @@ static irqreturn_t hi6421_spmi_irq_handler(int irq, void *priv)
{
struct hi6421_spmi_pmic *ddata = (struct hi6421_spmi_pmic *)priv;
unsigned long pending;
- unsigned int data;
+ unsigned int in;
int i, offset;

for (i = 0; i < HISI_IRQ_ARRAY; i++) {
- regmap_read(ddata->regmap, SOC_PMIC_IRQ0_ADDR + i, &data);
- data &= HISI_MASK_FIELD;
- if (data != 0)
- pr_debug("data[%d]=0x%d\n\r", i, data);
- regmap_write(ddata->regmap, i + SOC_PMIC_IRQ0_ADDR, data);
+ regmap_read(ddata->regmap, SOC_PMIC_IRQ0_ADDR + i, &in);
+ pending = HISI_MASK & in;
+ regmap_write(ddata->regmap, SOC_PMIC_IRQ0_ADDR + i, pending);

- /* for_each_set_bit() macro requires unsigned long */
- pending = data;
-
- /* solve powerkey order */
- if ((i == HISI_IRQ_KEY_NUM) &&
- ((pending & HISI_IRQ_KEY_VALUE) == HISI_IRQ_KEY_VALUE)) {
- generic_handle_irq(ddata->irqs[HISI_IRQ_KEY_DOWN]);
- generic_handle_irq(ddata->irqs[HISI_IRQ_KEY_UP]);
+ if (i == HISI_IRQ_KEY_NUM &&
+ (pending & HISI_IRQ_KEY_VALUE) == HISI_IRQ_KEY_VALUE) {
+ generic_handle_irq(ddata->irqs[POWERKEY_DOWN]);
+ generic_handle_irq(ddata->irqs[POWERKEY_UP]);
pending &= (~HISI_IRQ_KEY_VALUE);
}

- if (pending) {
- for_each_set_bit(offset, &pending, HISI_BITS)
- generic_handle_irq(ddata->irqs[offset + i * HISI_BITS]);
- }
+ if (!pending)
+ continue;
+
+ for_each_set_bit(offset, &pending, HISI_BITS)
+ generic_handle_irq(ddata->irqs[offset + i * HISI_BITS]);
}

return IRQ_HANDLED;
@@ -99,7 +89,7 @@ static void hi6421_spmi_irq_mask(struct irq_data *d)
unsigned int data;
u32 offset;

- offset = (irqd_to_hwirq(d) >> 3);
+ offset = (irqd_to_hwirq(d) >> HISI_IRQ_MASK);
offset += SOC_PMIC_IRQ_MASK_0_ADDR;

spin_lock_irqsave(&ddata->lock, flags);
@@ -107,6 +97,7 @@ static void hi6421_spmi_irq_mask(struct irq_data *d)
regmap_read(ddata->regmap, offset, &data);
data |= (1 << (irqd_to_hwirq(d) & 0x07));
regmap_write(ddata->regmap, offset, data);
+
spin_unlock_irqrestore(&ddata->lock, flags);
}

@@ -120,9 +111,11 @@ static void hi6421_spmi_irq_unmask(struct irq_data *d)
offset += SOC_PMIC_IRQ_MASK_0_ADDR;

spin_lock_irqsave(&ddata->lock, flags);
+
regmap_read(ddata->regmap, offset, &data);
data &= ~(1 << (irqd_to_hwirq(d) & 0x07));
regmap_write(ddata->regmap, offset, data);
+
spin_unlock_irqrestore(&ddata->lock, flags);
}

@@ -152,28 +145,25 @@ static const struct irq_domain_ops hi6421_spmi_domain_ops = {
.xlate = irq_domain_xlate_twocell,
};

-static void hi6421_spmi_pmic_irq_prc(struct hi6421_spmi_pmic *ddata)
+static void hi6421_spmi_pmic_irq_init(struct hi6421_spmi_pmic *ddata)
{
int i;
unsigned int pending;

- for (i = 0 ; i < HISI_IRQ_ARRAY; i++)
+ for (i = 0; i < HISI_IRQ_ARRAY; i++)
regmap_write(ddata->regmap, SOC_PMIC_IRQ_MASK_0_ADDR + i,
- HISI_MASK_STATE);
+ HISI_MASK);

- for (i = 0 ; i < HISI_IRQ_ARRAY; i++) {
+ for (i = 0; i < HISI_IRQ_ARRAY; i++) {
regmap_read(ddata->regmap, SOC_PMIC_IRQ0_ADDR + i, &pending);
-
- pr_debug("PMU IRQ address value:irq[0x%x] = 0x%x\n",
- SOC_PMIC_IRQ0_ADDR + i, pending);
regmap_write(ddata->regmap, SOC_PMIC_IRQ0_ADDR + i,
- HISI_MASK_STATE);
+ HISI_MASK);
}
}

static const struct regmap_config regmap_config = {
.reg_bits = 16,
- .val_bits = 8,
+ .val_bits = HISI_BITS,
.max_register = 0xffff,
.fast_io = true
};
@@ -213,7 +203,7 @@ static int hi6421_spmi_pmic_probe(struct spmi_device *pdev)

ddata->irq = gpio_to_irq(ddata->gpio);

- hi6421_spmi_pmic_irq_prc(ddata);
+ hi6421_spmi_pmic_irq_init(ddata);

ddata->irqs = devm_kzalloc(dev, HISI_IRQ_NUM * sizeof(int), GFP_KERNEL);
if (!ddata->irqs)
--
2.29.2
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