Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933629AbcKONDt (ORCPT ); Tue, 15 Nov 2016 08:03:49 -0500 Received: from mail-pg0-f66.google.com ([74.125.83.66]:35385 "EHLO mail-pg0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753210AbcKONDA (ORCPT ); Tue, 15 Nov 2016 08:03:00 -0500 From: Milo Kim To: Lee Jones Cc: Tony Lindgren , linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org, Milo Kim Subject: [PATCH 4/5] mfd: tps65217: Make an interrupt handler simpler Date: Tue, 15 Nov 2016 22:02:14 +0900 Message-Id: <20161115130215.3301-5-woogyom.kim@gmail.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20161115130215.3301-1-woogyom.kim@gmail.com> References: <20161115130215.3301-1-woogyom.kim@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4371 Lines: 139 Rework the IRQ handler by using HW IRQ number and status bit. Each HW IRQ number is matched with TPS65217 register layout[*]. (USB IRQ number is 0, AC is 1, Push button is 2) When an interrupt is enabled, mask bit should be cleared (unmasked). If an interrupt is disabled, then mask bit should be set (masked). This mask value is updated into the TPS65217 register in irq_sync_unlock(). Mask bit and interrupt status bit can be handled with HW IRQ number. Eventually, additional IRQ data, 'tps65217_irqs[]' and the function, 'irq_to_tps65217_irq()' are not necessary. [*] TPS65217 interrupt register layout Bit7 6 5 4 3 2 1 0 ---------------------------------------------- | x | PBM | ACM | USBM | x | PBI | ACI | USBI PBM: Push button status change interrupt mask ACM: AC interrupt mask USBM: USB power status change interrupt mask PBI: Push button status change interrupt ACI: AC power status change interrupt USBI: USB power status change interrupt x: Not used Signed-off-by: Milo Kim --- drivers/mfd/tps65217.c | 44 +++++++++----------------------------------- include/linux/mfd/tps65217.h | 1 + 2 files changed, 10 insertions(+), 35 deletions(-) diff --git a/drivers/mfd/tps65217.c b/drivers/mfd/tps65217.c index 9d76de9..7376090 100644 --- a/drivers/mfd/tps65217.c +++ b/drivers/mfd/tps65217.c @@ -42,26 +42,6 @@ static struct resource pb_resources[] = { DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_PB, "PB"), }; -struct tps65217_irq { - int mask; - int interrupt; -}; - -static const struct tps65217_irq tps65217_irqs[] = { - [TPS65217_IRQ_PB] = { - .mask = TPS65217_INT_PBM, - .interrupt = TPS65217_INT_PBI, - }, - [TPS65217_IRQ_AC] = { - .mask = TPS65217_INT_ACM, - .interrupt = TPS65217_INT_ACI, - }, - [TPS65217_IRQ_USB] = { - .mask = TPS65217_INT_USBM, - .interrupt = TPS65217_INT_USBI, - }, -}; - static void tps65217_irq_lock(struct irq_data *data) { struct tps65217 *tps = irq_data_get_irq_chip_data(data); @@ -74,34 +54,28 @@ static void tps65217_irq_sync_unlock(struct irq_data *data) struct tps65217 *tps = irq_data_get_irq_chip_data(data); int ret; - ret = tps65217_reg_write(tps, TPS65217_REG_INT, tps->irq_mask, - TPS65217_PROTECT_NONE); + ret = tps65217_set_bits(tps, TPS65217_REG_INT, TPS65217_INT_MASK, + tps->irq_mask, TPS65217_PROTECT_NONE); if (ret != 0) dev_err(tps->dev, "Failed to sync IRQ masks\n"); mutex_unlock(&tps->irq_lock); } -static inline const struct tps65217_irq * -irq_to_tps65217_irq(struct tps65217 *tps, struct irq_data *data) -{ - return &tps65217_irqs[data->hwirq]; -} - static void tps65217_irq_enable(struct irq_data *data) { struct tps65217 *tps = irq_data_get_irq_chip_data(data); - const struct tps65217_irq *irq_data = irq_to_tps65217_irq(tps, data); + u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT; - tps->irq_mask &= ~irq_data->mask; + tps->irq_mask &= ~mask; } static void tps65217_irq_disable(struct irq_data *data) { struct tps65217 *tps = irq_data_get_irq_chip_data(data); - const struct tps65217_irq *irq_data = irq_to_tps65217_irq(tps, data); + u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT; - tps->irq_mask |= irq_data->mask; + tps->irq_mask |= mask; } static struct irq_chip tps65217_irq_chip = { @@ -150,8 +124,8 @@ static irqreturn_t tps65217_irq_thread(int irq, void *data) return IRQ_NONE; } - for (i = 0; i < ARRAY_SIZE(tps65217_irqs); i++) { - if (status & tps65217_irqs[i].interrupt) { + for (i = 0; i < TPS65217_NUM_IRQ; i++) { + if (status & BIT(i)) { handle_nested_irq(irq_find_mapping(tps->irq_domain, i)); handled = true; } @@ -430,7 +404,7 @@ static int tps65217_remove(struct i2c_client *client) unsigned int virq; int i; - for (i = 0; i < ARRAY_SIZE(tps65217_irqs); i++) { + for (i = 0; i < TPS65217_NUM_IRQ; i++) { virq = irq_find_mapping(tps->irq_domain, i); if (virq) irq_dispose_mapping(virq); diff --git a/include/linux/mfd/tps65217.h b/include/linux/mfd/tps65217.h index 35d8d64..eac2857 100644 --- a/include/linux/mfd/tps65217.h +++ b/include/linux/mfd/tps65217.h @@ -79,6 +79,7 @@ #define TPS65217_INT_PBI BIT(2) #define TPS65217_INT_ACI BIT(1) #define TPS65217_INT_USBI BIT(0) +#define TPS65217_INT_SHIFT 4 #define TPS65217_INT_MASK (TPS65217_INT_PBM | TPS65217_INT_ACM | \ TPS65217_INT_USBM) -- 2.9.3