linux-kernel - [PATCH V2 1/2] gpio: pmic-eic-sprd: Two-dimensional arrays maintain pmic eic

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Message-ID: <20230921122527.15261-2-Wenhua.Lin@unisoc.com>
Date:   Thu, 21 Sep 2023 20:25:26 +0800
From:   Wenhua Lin <Wenhua.Lin@...soc.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Andy Shevchenko <andy@...nel.org>,
        Bartosz Golaszewski <brgl@...ev.pl>
CC:     Orson Zhai <orsonzhai@...il.com>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        Chunyan Zhang <zhang.lyra@...il.com>,
        <linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        wenhua lin <wenhua.lin1994@...il.com>,
        Wenhua Lin <Wenhua.Lin@...soc.com>,
        Xiongpeng Wu <xiongpeng.wu@...soc.com>
Subject: [PATCH V2 1/2] gpio: pmic-eic-sprd: Two-dimensional arrays maintain pmic eic

A bank PMIC EIC contains 16 EICs, and the operating registers
are BIT0-BIT15, such as BIT0 of the register operated by EIC0.
Using the one-dimensional array reg[CACHE_NR_REGS] for maintenance
will cause the configuration of other EICs to be affected when
operating a certain EIC. In order to solve this problem, the register
operation bits of each PMIC EIC are maintained through the two-dimensional
array reg[SPRD_PMIC_EIC_NR][CACHE_NR_REGS] to avoid mutual interference.

Signed-off-by: Wenhua Lin <Wenhua.Lin@...soc.com>
---
 drivers/gpio/gpio-pmic-eic-sprd.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/drivers/gpio/gpio-pmic-eic-sprd.c b/drivers/gpio/gpio-pmic-eic-sprd.c
index c3e4d90f6b18..442968bb2490 100644
--- a/drivers/gpio/gpio-pmic-eic-sprd.c
+++ b/drivers/gpio/gpio-pmic-eic-sprd.c
@@ -57,7 +57,7 @@ struct sprd_pmic_eic {
 	struct gpio_chip chip;
 	struct regmap *map;
 	u32 offset;
-	u8 reg[CACHE_NR_REGS];
+	u8 reg[SPRD_PMIC_EIC_NR][CACHE_NR_REGS];
 	struct mutex buslock;
 	int irq;
 };
@@ -151,8 +151,8 @@ static void sprd_pmic_eic_irq_mask(struct irq_data *data)
 	struct sprd_pmic_eic *pmic_eic = gpiochip_get_data(chip);
 	u32 offset = irqd_to_hwirq(data);
 
-	pmic_eic->reg[REG_IE] = 0;
-	pmic_eic->reg[REG_TRIG] = 0;
+	pmic_eic->reg[offset][REG_IE] = 0;
+	pmic_eic->reg[offset][REG_TRIG] = 0;
 
 	gpiochip_disable_irq(chip, offset);
 }
@@ -165,8 +165,8 @@ static void sprd_pmic_eic_irq_unmask(struct irq_data *data)
 
 	gpiochip_enable_irq(chip, offset);
 
-	pmic_eic->reg[REG_IE] = 1;
-	pmic_eic->reg[REG_TRIG] = 1;
+	pmic_eic->reg[offset][REG_IE] = 1;
+	pmic_eic->reg[offset][REG_TRIG] = 1;
 }
 
 static int sprd_pmic_eic_irq_set_type(struct irq_data *data,
@@ -174,13 +174,14 @@ static int sprd_pmic_eic_irq_set_type(struct irq_data *data,
 {
 	struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
 	struct sprd_pmic_eic *pmic_eic = gpiochip_get_data(chip);
+	u32 offset = irqd_to_hwirq(data);
 
 	switch (flow_type) {
 	case IRQ_TYPE_LEVEL_HIGH:
-		pmic_eic->reg[REG_IEV] = 1;
+		pmic_eic->reg[offset][REG_IEV] = 1;
 		break;
 	case IRQ_TYPE_LEVEL_LOW:
-		pmic_eic->reg[REG_IEV] = 0;
+		pmic_eic->reg[offset][REG_IEV] = 0;
 		break;
 	case IRQ_TYPE_EDGE_RISING:
 	case IRQ_TYPE_EDGE_FALLING:
@@ -222,15 +223,15 @@ static void sprd_pmic_eic_bus_sync_unlock(struct irq_data *data)
 			sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_IEV, 1);
 	} else {
 		sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_IEV,
-				     pmic_eic->reg[REG_IEV]);
+				     pmic_eic->reg[offset][REG_IEV]);
 	}
 
 	/* Set irq unmask */
 	sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_IE,
-			     pmic_eic->reg[REG_IE]);
+			     pmic_eic->reg[offset][REG_IE]);
 	/* Generate trigger start pulse for debounce EIC */
 	sprd_pmic_eic_update(chip, offset, SPRD_PMIC_EIC_TRIG,
-			     pmic_eic->reg[REG_TRIG]);
+			     pmic_eic->reg[offset][REG_TRIG]);
 
 	mutex_unlock(&pmic_eic->buslock);
 }
-- 
2.17.1