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Message-ID: <1439541486-22203-1-git-send-email-maoguang.meng@mediatek.com>
Date: Fri, 14 Aug 2015 16:38:06 +0800
From: <maoguang.meng@...iatek.com>
To: Linus Walleij <linus.walleij@...aro.org>
CC: Matthias Brugger <matthias.bgg@...il.com>,
Hongzhou Yang <hongzhou.yang@...iatek.com>,
Yingjoe Chen <yingjoe.chen@...iatek.com>,
<linux-gpio@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-mediatek@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>,
Maoguang Meng <maoguang.meng@...iatek.com>
Subject: [PATCH v4] pinctrl: mediatek: Implement wake handler and suspend resume
From: Maoguang Meng <maoguang.meng@...iatek.com>
This patch implement irq_set_wake to get who is wakeup source and
setup on suspend resume.
Signed-off-by: Maoguang Meng <maoguang.meng@...iatek.com>
---
changes since v3:
-add a comment in mtk_eint_chip_read_mask.
-delete ALIGN when allocate eint_offsets.ports.
-fix unrelated change.
changes since v2:
-modify irq_wake to handle irq wakeup source.
-allocate two buffers separately.
-fix some codestyle.
Changes since v1:
-implement irq_wake handler.
---
drivers/pinctrl/mediatek/pinctrl-mt8173.c | 1 +
drivers/pinctrl/mediatek/pinctrl-mtk-common.c | 91 ++++++++++++++++++++++++++-
drivers/pinctrl/mediatek/pinctrl-mtk-common.h | 4 ++
3 files changed, 95 insertions(+), 1 deletion(-)
diff --git a/drivers/pinctrl/mediatek/pinctrl-mt8173.c b/drivers/pinctrl/mediatek/pinctrl-mt8173.c
index d0c811d..ad27184 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mt8173.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mt8173.c
@@ -385,6 +385,7 @@ static struct platform_driver mtk_pinctrl_driver = {
.driver = {
.name = "mediatek-mt8173-pinctrl",
.of_match_table = mt8173_pctrl_match,
+ .pm = &mtk_eint_pm_ops,
},
};
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
index ad1ea16..fe34ce9 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.c
@@ -33,6 +33,7 @@
#include <linux/mfd/syscon.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
+#include <linux/pm.h>
#include <dt-bindings/pinctrl/mt65xx.h>
#include "../core.h"
@@ -1062,6 +1063,77 @@ static int mtk_eint_set_type(struct irq_data *d,
return 0;
}
+static int mtk_eint_irq_set_wake(struct irq_data *d, unsigned int on)
+{
+ struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
+ int shift = d->hwirq & 0x1f;
+ int reg = d->hwirq >> 5;
+
+ if (on)
+ pctl->wake_mask[reg] |= BIT(shift);
+ else
+ pctl->wake_mask[reg] &= ~BIT(shift);
+
+ return 0;
+}
+
+static void mtk_eint_chip_write_mask(const struct mtk_eint_offsets *chip,
+ void __iomem *eint_reg_base, u32 *buf)
+{
+ int port;
+ void __iomem *reg;
+
+ for (port = 0; port < chip->ports; port++) {
+ reg = eint_reg_base + (port << 2);
+ writel_relaxed(~buf[port], reg + chip->mask_set);
+ writel_relaxed(buf[port], reg + chip->mask_clr);
+ }
+}
+
+static void mtk_eint_chip_read_mask(const struct mtk_eint_offsets *chip,
+ void __iomem *eint_reg_base, u32 *buf)
+{
+ int port;
+ void __iomem *reg;
+
+ for (port = 0; port < chip->ports; port++) {
+ reg = eint_reg_base + chip->mask + (port << 2);
+ buf[port] = ~readl_relaxed(reg);
+ /* Mask is 0 when irq is enabled, and 1 when disabled. */
+ }
+}
+
+static int mtk_eint_suspend(struct device *device)
+{
+ void __iomem *reg;
+ struct mtk_pinctrl *pctl = dev_get_drvdata(device);
+ const struct mtk_eint_offsets *eint_offsets =
+ &pctl->devdata->eint_offsets;
+
+ reg = pctl->eint_reg_base;
+ mtk_eint_chip_read_mask(eint_offsets, reg, pctl->cur_mask);
+ mtk_eint_chip_write_mask(eint_offsets, reg, pctl->wake_mask);
+
+ return 0;
+}
+
+static int mtk_eint_resume(struct device *device)
+{
+ struct mtk_pinctrl *pctl = dev_get_drvdata(device);
+ const struct mtk_eint_offsets *eint_offsets =
+ &pctl->devdata->eint_offsets;
+
+ mtk_eint_chip_write_mask(eint_offsets,
+ pctl->eint_reg_base, pctl->cur_mask);
+
+ return 0;
+}
+
+const struct dev_pm_ops mtk_eint_pm_ops = {
+ .suspend = mtk_eint_suspend,
+ .resume = mtk_eint_resume,
+};
+
static void mtk_eint_ack(struct irq_data *d)
{
struct mtk_pinctrl *pctl = irq_data_get_irq_chip_data(d);
@@ -1076,10 +1148,12 @@ static void mtk_eint_ack(struct irq_data *d)
static struct irq_chip mtk_pinctrl_irq_chip = {
.name = "mt-eint",
+ .irq_disable = mtk_eint_mask,
.irq_mask = mtk_eint_mask,
.irq_unmask = mtk_eint_unmask,
.irq_ack = mtk_eint_ack,
.irq_set_type = mtk_eint_set_type,
+ .irq_set_wake = mtk_eint_irq_set_wake,
.irq_request_resources = mtk_pinctrl_irq_request_resources,
.irq_release_resources = mtk_pinctrl_irq_release_resources,
};
@@ -1217,7 +1291,7 @@ int mtk_pctrl_init(struct platform_device *pdev,
struct device_node *np = pdev->dev.of_node, *node;
struct property *prop;
struct resource *res;
- int i, ret, irq;
+ int i, ret, irq, ports_buf;
pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);
if (!pctl)
@@ -1319,6 +1393,21 @@ int mtk_pctrl_init(struct platform_device *pdev,
goto chip_error;
}
+ ports_buf = pctl->devdata->eint_offsets.ports;
+ pctl->wake_mask = devm_kcalloc(&pdev->dev, ports_buf,
+ sizeof(*pctl->wake_mask), GFP_KERNEL);
+ if (!pctl->wake_mask) {
+ ret = -ENOMEM;
+ goto chip_error;
+ }
+
+ pctl->cur_mask = devm_kcalloc(&pdev->dev, ports_buf,
+ sizeof(*pctl->cur_mask), GFP_KERNEL);
+ if (!pctl->cur_mask) {
+ ret = -ENOMEM;
+ goto chip_error;
+ }
+
pctl->eint_dual_edges = devm_kcalloc(&pdev->dev, pctl->devdata->ap_num,
sizeof(int), GFP_KERNEL);
if (!pctl->eint_dual_edges) {
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common.h b/drivers/pinctrl/mediatek/pinctrl-mtk-common.h
index 30213e5..f1be8e8 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common.h
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common.h
@@ -266,6 +266,8 @@ struct mtk_pinctrl {
void __iomem *eint_reg_base;
struct irq_domain *domain;
int *eint_dual_edges;
+ u32 *wake_mask;
+ u32 *cur_mask;
};
int mtk_pctrl_init(struct platform_device *pdev,
@@ -281,4 +283,6 @@ int mtk_pconf_spec_set_ies_smt_range(struct regmap *regmap,
const struct mtk_pin_ies_smt_set *ies_smt_infos, unsigned int info_num,
unsigned int pin, unsigned char align, int value);
+extern const struct dev_pm_ops mtk_eint_pm_ops;
+
#endif /* __PINCTRL_MTK_COMMON_H */
--
1.8.1.1.dirty
--
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