* [PATCH v2 0/5] media: rc: meson-ir: series with smaller improvements
@ 2017-04-12 19:26 ` Heiner Kallweit
0 siblings, 0 replies; 12+ messages in thread
From: Heiner Kallweit @ 2017-04-12 19:26 UTC (permalink / raw)
To: linus-amlogic
This series includes smaller improvements for the meson-ir driver.
Tested on a Odroid C2.
v2:
- minor change to patch 2
- added Reviewed-by to patch 2, 3, 4
Heiner Kallweit (5):
media: rc: meson-ir: remove irq from struct meson_ir
media: rc: meson-ir: make use of the bitfield macros
media: rc: meson-ir: switch to managed rc device allocation / registration
media: rc: meson-ir: use readl_relaxed in the interrupt handler
media: rc: meson-ir: change irq name to to of node name
drivers/media/rc/meson-ir.c | 64 ++++++++++++++++++---------------------------
1 file changed, 26 insertions(+), 38 deletions(-)
--
2.12.2
^ permalink raw reply [flat|nested] 12+ messages in thread
* [PATCH v2 1/5] media: rc: meson-ir: remove irq from struct meson_ir
2017-04-12 19:26 ` Heiner Kallweit
@ 2017-04-12 19:28 ` Heiner Kallweit
-1 siblings, 0 replies; 12+ messages in thread
From: Heiner Kallweit @ 2017-04-12 19:28 UTC (permalink / raw)
To: Mauro Carvalho Chehab, Sean Young, Kevin Hilman, Neil Armstrong
Cc: linux-media, linux-amlogic
The irq number is used in the probe function only, therefore just use
a local variable.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
v2:
- no changes
---
drivers/media/rc/meson-ir.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
index 5576dbd6..a4128d7c 100644
--- a/drivers/media/rc/meson-ir.c
+++ b/drivers/media/rc/meson-ir.c
@@ -68,7 +68,6 @@
struct meson_ir {
void __iomem *reg;
struct rc_dev *rc;
- int irq;
spinlock_t lock;
};
@@ -112,7 +111,7 @@ static int meson_ir_probe(struct platform_device *pdev)
struct resource *res;
const char *map_name;
struct meson_ir *ir;
- int ret;
+ int irq, ret;
ir = devm_kzalloc(dev, sizeof(struct meson_ir), GFP_KERNEL);
if (!ir)
@@ -125,10 +124,10 @@ static int meson_ir_probe(struct platform_device *pdev)
return PTR_ERR(ir->reg);
}
- ir->irq = platform_get_irq(pdev, 0);
- if (ir->irq < 0) {
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
dev_err(dev, "no irq resource\n");
- return ir->irq;
+ return irq;
}
ir->rc = rc_allocate_device(RC_DRIVER_IR_RAW);
@@ -158,7 +157,7 @@ static int meson_ir_probe(struct platform_device *pdev)
goto out_free;
}
- ret = devm_request_irq(dev, ir->irq, meson_ir_irq, 0, "ir-meson", ir);
+ ret = devm_request_irq(dev, irq, meson_ir_irq, 0, "ir-meson", ir);
if (ret) {
dev_err(dev, "failed to request irq\n");
goto out_unreg;
--
2.12.2
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH v2 1/5] media: rc: meson-ir: remove irq from struct meson_ir
@ 2017-04-12 19:28 ` Heiner Kallweit
0 siblings, 0 replies; 12+ messages in thread
From: Heiner Kallweit @ 2017-04-12 19:28 UTC (permalink / raw)
To: linus-amlogic
The irq number is used in the probe function only, therefore just use
a local variable.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
v2:
- no changes
---
drivers/media/rc/meson-ir.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
index 5576dbd6..a4128d7c 100644
--- a/drivers/media/rc/meson-ir.c
+++ b/drivers/media/rc/meson-ir.c
@@ -68,7 +68,6 @@
struct meson_ir {
void __iomem *reg;
struct rc_dev *rc;
- int irq;
spinlock_t lock;
};
@@ -112,7 +111,7 @@ static int meson_ir_probe(struct platform_device *pdev)
struct resource *res;
const char *map_name;
struct meson_ir *ir;
- int ret;
+ int irq, ret;
ir = devm_kzalloc(dev, sizeof(struct meson_ir), GFP_KERNEL);
if (!ir)
@@ -125,10 +124,10 @@ static int meson_ir_probe(struct platform_device *pdev)
return PTR_ERR(ir->reg);
}
- ir->irq = platform_get_irq(pdev, 0);
- if (ir->irq < 0) {
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
dev_err(dev, "no irq resource\n");
- return ir->irq;
+ return irq;
}
ir->rc = rc_allocate_device(RC_DRIVER_IR_RAW);
@@ -158,7 +157,7 @@ static int meson_ir_probe(struct platform_device *pdev)
goto out_free;
}
- ret = devm_request_irq(dev, ir->irq, meson_ir_irq, 0, "ir-meson", ir);
+ ret = devm_request_irq(dev, irq, meson_ir_irq, 0, "ir-meson", ir);
if (ret) {
dev_err(dev, "failed to request irq\n");
goto out_unreg;
--
2.12.2
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH v2 2/5] media: rc: meson-ir: make use of the bitfield macros
2017-04-12 19:26 ` Heiner Kallweit
@ 2017-04-12 19:30 ` Heiner Kallweit
-1 siblings, 0 replies; 12+ messages in thread
From: Heiner Kallweit @ 2017-04-12 19:30 UTC (permalink / raw)
To: Mauro Carvalho Chehab, Sean Young, Kevin Hilman, Neil Armstrong
Cc: linux-media, linux-amlogic
Make use of the bitfield macros thus partially hiding the complexity
of dealing with bitfields.
The patch also includes a minor fix to REG0_RATE_MASK, so far it was
set to bit 0..10, but according to the spec it's bit 0..11.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
---
v2:
- revert change in meson_ir_set_mask
- add R-b
---
drivers/media/rc/meson-ir.c | 26 ++++++++++++--------------
1 file changed, 12 insertions(+), 14 deletions(-)
diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
index a4128d7c..3864ebe3 100644
--- a/drivers/media/rc/meson-ir.c
+++ b/drivers/media/rc/meson-ir.c
@@ -19,6 +19,7 @@
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
+#include <linux/bitfield.h>
#include <media/rc-core.h>
@@ -36,27 +37,24 @@
/* only available on Meson 8b and newer */
#define IR_DEC_REG2 0x20
-#define REG0_RATE_MASK (BIT(11) - 1)
+#define REG0_RATE_MASK GENMASK(11, 0)
#define DECODE_MODE_NEC 0x0
#define DECODE_MODE_RAW 0x2
/* Meson 6b uses REG1 to configure the mode */
#define REG1_MODE_MASK GENMASK(8, 7)
-#define REG1_MODE_SHIFT 7
/* Meson 8b / GXBB use REG2 to configure the mode */
#define REG2_MODE_MASK GENMASK(3, 0)
-#define REG2_MODE_SHIFT 0
-#define REG1_TIME_IV_SHIFT 16
-#define REG1_TIME_IV_MASK ((BIT(13) - 1) << REG1_TIME_IV_SHIFT)
+#define REG1_TIME_IV_MASK GENMASK(28, 16)
-#define REG1_IRQSEL_MASK (BIT(2) | BIT(3))
-#define REG1_IRQSEL_NEC_MODE (0 << 2)
-#define REG1_IRQSEL_RISE_FALL (1 << 2)
-#define REG1_IRQSEL_FALL (2 << 2)
-#define REG1_IRQSEL_RISE (3 << 2)
+#define REG1_IRQSEL_MASK GENMASK(3, 2)
+#define REG1_IRQSEL_NEC_MODE 0
+#define REG1_IRQSEL_RISE_FALL 1
+#define REG1_IRQSEL_FALL 2
+#define REG1_IRQSEL_RISE 3
#define REG1_RESET BIT(0)
#define REG1_ENABLE BIT(15)
@@ -91,7 +89,7 @@ static irqreturn_t meson_ir_irq(int irqno, void *dev_id)
spin_lock(&ir->lock);
duration = readl(ir->reg + IR_DEC_REG1);
- duration = (duration & REG1_TIME_IV_MASK) >> REG1_TIME_IV_SHIFT;
+ duration = FIELD_GET(REG1_TIME_IV_MASK, duration);
rawir.duration = US_TO_NS(duration * MESON_TRATE);
rawir.pulse = !!(readl(ir->reg + IR_DEC_STATUS) & STATUS_IR_DEC_IN);
@@ -170,16 +168,16 @@ static int meson_ir_probe(struct platform_device *pdev)
/* Set general operation mode (= raw/software decoding) */
if (of_device_is_compatible(node, "amlogic,meson6-ir"))
meson_ir_set_mask(ir, IR_DEC_REG1, REG1_MODE_MASK,
- DECODE_MODE_RAW << REG1_MODE_SHIFT);
+ FIELD_PREP(REG1_MODE_MASK, DECODE_MODE_RAW));
else
meson_ir_set_mask(ir, IR_DEC_REG2, REG2_MODE_MASK,
- DECODE_MODE_RAW << REG2_MODE_SHIFT);
+ FIELD_PREP(REG2_MODE_MASK, DECODE_MODE_RAW));
/* Set rate */
meson_ir_set_mask(ir, IR_DEC_REG0, REG0_RATE_MASK, MESON_TRATE - 1);
/* IRQ on rising and falling edges */
meson_ir_set_mask(ir, IR_DEC_REG1, REG1_IRQSEL_MASK,
- REG1_IRQSEL_RISE_FALL);
+ FIELD_PREP(REG1_IRQSEL_MASK, REG1_IRQSEL_RISE_FALL));
/* Enable the decoder */
meson_ir_set_mask(ir, IR_DEC_REG1, REG1_ENABLE, REG1_ENABLE);
--
2.12.2
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH v2 2/5] media: rc: meson-ir: make use of the bitfield macros
@ 2017-04-12 19:30 ` Heiner Kallweit
0 siblings, 0 replies; 12+ messages in thread
From: Heiner Kallweit @ 2017-04-12 19:30 UTC (permalink / raw)
To: linus-amlogic
Make use of the bitfield macros thus partially hiding the complexity
of dealing with bitfields.
The patch also includes a minor fix to REG0_RATE_MASK, so far it was
set to bit 0..10, but according to the spec it's bit 0..11.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
---
v2:
- revert change in meson_ir_set_mask
- add R-b
---
drivers/media/rc/meson-ir.c | 26 ++++++++++++--------------
1 file changed, 12 insertions(+), 14 deletions(-)
diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
index a4128d7c..3864ebe3 100644
--- a/drivers/media/rc/meson-ir.c
+++ b/drivers/media/rc/meson-ir.c
@@ -19,6 +19,7 @@
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
+#include <linux/bitfield.h>
#include <media/rc-core.h>
@@ -36,27 +37,24 @@
/* only available on Meson 8b and newer */
#define IR_DEC_REG2 0x20
-#define REG0_RATE_MASK (BIT(11) - 1)
+#define REG0_RATE_MASK GENMASK(11, 0)
#define DECODE_MODE_NEC 0x0
#define DECODE_MODE_RAW 0x2
/* Meson 6b uses REG1 to configure the mode */
#define REG1_MODE_MASK GENMASK(8, 7)
-#define REG1_MODE_SHIFT 7
/* Meson 8b / GXBB use REG2 to configure the mode */
#define REG2_MODE_MASK GENMASK(3, 0)
-#define REG2_MODE_SHIFT 0
-#define REG1_TIME_IV_SHIFT 16
-#define REG1_TIME_IV_MASK ((BIT(13) - 1) << REG1_TIME_IV_SHIFT)
+#define REG1_TIME_IV_MASK GENMASK(28, 16)
-#define REG1_IRQSEL_MASK (BIT(2) | BIT(3))
-#define REG1_IRQSEL_NEC_MODE (0 << 2)
-#define REG1_IRQSEL_RISE_FALL (1 << 2)
-#define REG1_IRQSEL_FALL (2 << 2)
-#define REG1_IRQSEL_RISE (3 << 2)
+#define REG1_IRQSEL_MASK GENMASK(3, 2)
+#define REG1_IRQSEL_NEC_MODE 0
+#define REG1_IRQSEL_RISE_FALL 1
+#define REG1_IRQSEL_FALL 2
+#define REG1_IRQSEL_RISE 3
#define REG1_RESET BIT(0)
#define REG1_ENABLE BIT(15)
@@ -91,7 +89,7 @@ static irqreturn_t meson_ir_irq(int irqno, void *dev_id)
spin_lock(&ir->lock);
duration = readl(ir->reg + IR_DEC_REG1);
- duration = (duration & REG1_TIME_IV_MASK) >> REG1_TIME_IV_SHIFT;
+ duration = FIELD_GET(REG1_TIME_IV_MASK, duration);
rawir.duration = US_TO_NS(duration * MESON_TRATE);
rawir.pulse = !!(readl(ir->reg + IR_DEC_STATUS) & STATUS_IR_DEC_IN);
@@ -170,16 +168,16 @@ static int meson_ir_probe(struct platform_device *pdev)
/* Set general operation mode (= raw/software decoding) */
if (of_device_is_compatible(node, "amlogic,meson6-ir"))
meson_ir_set_mask(ir, IR_DEC_REG1, REG1_MODE_MASK,
- DECODE_MODE_RAW << REG1_MODE_SHIFT);
+ FIELD_PREP(REG1_MODE_MASK, DECODE_MODE_RAW));
else
meson_ir_set_mask(ir, IR_DEC_REG2, REG2_MODE_MASK,
- DECODE_MODE_RAW << REG2_MODE_SHIFT);
+ FIELD_PREP(REG2_MODE_MASK, DECODE_MODE_RAW));
/* Set rate */
meson_ir_set_mask(ir, IR_DEC_REG0, REG0_RATE_MASK, MESON_TRATE - 1);
/* IRQ on rising and falling edges */
meson_ir_set_mask(ir, IR_DEC_REG1, REG1_IRQSEL_MASK,
- REG1_IRQSEL_RISE_FALL);
+ FIELD_PREP(REG1_IRQSEL_MASK, REG1_IRQSEL_RISE_FALL));
/* Enable the decoder */
meson_ir_set_mask(ir, IR_DEC_REG1, REG1_ENABLE, REG1_ENABLE);
--
2.12.2
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH v2 3/5] media: rc: meson-ir: switch to managed rc device allocation / registration
2017-04-12 19:26 ` Heiner Kallweit
@ 2017-04-12 19:32 ` Heiner Kallweit
-1 siblings, 0 replies; 12+ messages in thread
From: Heiner Kallweit @ 2017-04-12 19:32 UTC (permalink / raw)
To: Mauro Carvalho Chehab, Sean Young, Kevin Hilman, Neil Armstrong
Cc: linux-media, linux-amlogic
Switch to the managed versions of rc_allocate_device/rc_register_device,
thus simplifying the code.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
---
v2:
- added R-b
---
drivers/media/rc/meson-ir.c | 18 ++++--------------
1 file changed, 4 insertions(+), 14 deletions(-)
diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
index 3864ebe3..cf8943d2 100644
--- a/drivers/media/rc/meson-ir.c
+++ b/drivers/media/rc/meson-ir.c
@@ -128,7 +128,7 @@ static int meson_ir_probe(struct platform_device *pdev)
return irq;
}
- ir->rc = rc_allocate_device(RC_DRIVER_IR_RAW);
+ ir->rc = devm_rc_allocate_device(dev, RC_DRIVER_IR_RAW);
if (!ir->rc) {
dev_err(dev, "failed to allocate rc device\n");
return -ENOMEM;
@@ -140,7 +140,6 @@ static int meson_ir_probe(struct platform_device *pdev)
ir->rc->input_id.bustype = BUS_HOST;
map_name = of_get_property(node, "linux,rc-map-name", NULL);
ir->rc->map_name = map_name ? map_name : RC_MAP_EMPTY;
- ir->rc->dev.parent = dev;
ir->rc->allowed_protocols = RC_BIT_ALL_IR_DECODER;
ir->rc->rx_resolution = US_TO_NS(MESON_TRATE);
ir->rc->timeout = MS_TO_NS(200);
@@ -149,16 +148,16 @@ static int meson_ir_probe(struct platform_device *pdev)
spin_lock_init(&ir->lock);
platform_set_drvdata(pdev, ir);
- ret = rc_register_device(ir->rc);
+ ret = devm_rc_register_device(dev, ir->rc);
if (ret) {
dev_err(dev, "failed to register rc device\n");
- goto out_free;
+ return ret;
}
ret = devm_request_irq(dev, irq, meson_ir_irq, 0, "ir-meson", ir);
if (ret) {
dev_err(dev, "failed to request irq\n");
- goto out_unreg;
+ return ret;
}
/* Reset the decoder */
@@ -184,13 +183,6 @@ static int meson_ir_probe(struct platform_device *pdev)
dev_info(dev, "receiver initialized\n");
return 0;
-out_unreg:
- rc_unregister_device(ir->rc);
- ir->rc = NULL;
-out_free:
- rc_free_device(ir->rc);
-
- return ret;
}
static int meson_ir_remove(struct platform_device *pdev)
@@ -203,8 +195,6 @@ static int meson_ir_remove(struct platform_device *pdev)
meson_ir_set_mask(ir, IR_DEC_REG1, REG1_ENABLE, 0);
spin_unlock_irqrestore(&ir->lock, flags);
- rc_unregister_device(ir->rc);
-
return 0;
}
--
2.12.2
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH v2 3/5] media: rc: meson-ir: switch to managed rc device allocation / registration
@ 2017-04-12 19:32 ` Heiner Kallweit
0 siblings, 0 replies; 12+ messages in thread
From: Heiner Kallweit @ 2017-04-12 19:32 UTC (permalink / raw)
To: linus-amlogic
Switch to the managed versions of rc_allocate_device/rc_register_device,
thus simplifying the code.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
---
v2:
- added R-b
---
drivers/media/rc/meson-ir.c | 18 ++++--------------
1 file changed, 4 insertions(+), 14 deletions(-)
diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
index 3864ebe3..cf8943d2 100644
--- a/drivers/media/rc/meson-ir.c
+++ b/drivers/media/rc/meson-ir.c
@@ -128,7 +128,7 @@ static int meson_ir_probe(struct platform_device *pdev)
return irq;
}
- ir->rc = rc_allocate_device(RC_DRIVER_IR_RAW);
+ ir->rc = devm_rc_allocate_device(dev, RC_DRIVER_IR_RAW);
if (!ir->rc) {
dev_err(dev, "failed to allocate rc device\n");
return -ENOMEM;
@@ -140,7 +140,6 @@ static int meson_ir_probe(struct platform_device *pdev)
ir->rc->input_id.bustype = BUS_HOST;
map_name = of_get_property(node, "linux,rc-map-name", NULL);
ir->rc->map_name = map_name ? map_name : RC_MAP_EMPTY;
- ir->rc->dev.parent = dev;
ir->rc->allowed_protocols = RC_BIT_ALL_IR_DECODER;
ir->rc->rx_resolution = US_TO_NS(MESON_TRATE);
ir->rc->timeout = MS_TO_NS(200);
@@ -149,16 +148,16 @@ static int meson_ir_probe(struct platform_device *pdev)
spin_lock_init(&ir->lock);
platform_set_drvdata(pdev, ir);
- ret = rc_register_device(ir->rc);
+ ret = devm_rc_register_device(dev, ir->rc);
if (ret) {
dev_err(dev, "failed to register rc device\n");
- goto out_free;
+ return ret;
}
ret = devm_request_irq(dev, irq, meson_ir_irq, 0, "ir-meson", ir);
if (ret) {
dev_err(dev, "failed to request irq\n");
- goto out_unreg;
+ return ret;
}
/* Reset the decoder */
@@ -184,13 +183,6 @@ static int meson_ir_probe(struct platform_device *pdev)
dev_info(dev, "receiver initialized\n");
return 0;
-out_unreg:
- rc_unregister_device(ir->rc);
- ir->rc = NULL;
-out_free:
- rc_free_device(ir->rc);
-
- return ret;
}
static int meson_ir_remove(struct platform_device *pdev)
@@ -203,8 +195,6 @@ static int meson_ir_remove(struct platform_device *pdev)
meson_ir_set_mask(ir, IR_DEC_REG1, REG1_ENABLE, 0);
spin_unlock_irqrestore(&ir->lock, flags);
- rc_unregister_device(ir->rc);
-
return 0;
}
--
2.12.2
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH v2 4/5] media: rc: meson-ir: use readl_relaxed in the interrupt handler
2017-04-12 19:26 ` Heiner Kallweit
@ 2017-04-12 19:33 ` Heiner Kallweit
-1 siblings, 0 replies; 12+ messages in thread
From: Heiner Kallweit @ 2017-04-12 19:33 UTC (permalink / raw)
To: Mauro Carvalho Chehab, Sean Young, Kevin Hilman, Neil Armstrong
Cc: linux-media, linux-amlogic
We don't need the memory barriers here and an interrupt handler should
be as fast as possible. Therefore switch to readl_relaxed.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
---
v2:
- added R-b
---
drivers/media/rc/meson-ir.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
index cf8943d2..1c72593d 100644
--- a/drivers/media/rc/meson-ir.c
+++ b/drivers/media/rc/meson-ir.c
@@ -83,16 +83,17 @@ static void meson_ir_set_mask(struct meson_ir *ir, unsigned int reg,
static irqreturn_t meson_ir_irq(int irqno, void *dev_id)
{
struct meson_ir *ir = dev_id;
- u32 duration;
+ u32 duration, status;
DEFINE_IR_RAW_EVENT(rawir);
spin_lock(&ir->lock);
- duration = readl(ir->reg + IR_DEC_REG1);
+ duration = readl_relaxed(ir->reg + IR_DEC_REG1);
duration = FIELD_GET(REG1_TIME_IV_MASK, duration);
rawir.duration = US_TO_NS(duration * MESON_TRATE);
- rawir.pulse = !!(readl(ir->reg + IR_DEC_STATUS) & STATUS_IR_DEC_IN);
+ status = readl_relaxed(ir->reg + IR_DEC_STATUS);
+ rawir.pulse = !!(status & STATUS_IR_DEC_IN);
ir_raw_event_store_with_filter(ir->rc, &rawir);
ir_raw_event_handle(ir->rc);
--
2.12.2
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH v2 4/5] media: rc: meson-ir: use readl_relaxed in the interrupt handler
@ 2017-04-12 19:33 ` Heiner Kallweit
0 siblings, 0 replies; 12+ messages in thread
From: Heiner Kallweit @ 2017-04-12 19:33 UTC (permalink / raw)
To: linus-amlogic
We don't need the memory barriers here and an interrupt handler should
be as fast as possible. Therefore switch to readl_relaxed.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
---
v2:
- added R-b
---
drivers/media/rc/meson-ir.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
index cf8943d2..1c72593d 100644
--- a/drivers/media/rc/meson-ir.c
+++ b/drivers/media/rc/meson-ir.c
@@ -83,16 +83,17 @@ static void meson_ir_set_mask(struct meson_ir *ir, unsigned int reg,
static irqreturn_t meson_ir_irq(int irqno, void *dev_id)
{
struct meson_ir *ir = dev_id;
- u32 duration;
+ u32 duration, status;
DEFINE_IR_RAW_EVENT(rawir);
spin_lock(&ir->lock);
- duration = readl(ir->reg + IR_DEC_REG1);
+ duration = readl_relaxed(ir->reg + IR_DEC_REG1);
duration = FIELD_GET(REG1_TIME_IV_MASK, duration);
rawir.duration = US_TO_NS(duration * MESON_TRATE);
- rawir.pulse = !!(readl(ir->reg + IR_DEC_STATUS) & STATUS_IR_DEC_IN);
+ status = readl_relaxed(ir->reg + IR_DEC_STATUS);
+ rawir.pulse = !!(status & STATUS_IR_DEC_IN);
ir_raw_event_store_with_filter(ir->rc, &rawir);
ir_raw_event_handle(ir->rc);
--
2.12.2
^ permalink raw reply related [flat|nested] 12+ messages in thread
* [PATCH v2 5/5] media: rc: meson-ir: change irq name to to of node name
2017-04-12 19:26 ` Heiner Kallweit
@ 2017-04-12 19:34 ` Heiner Kallweit
-1 siblings, 0 replies; 12+ messages in thread
From: Heiner Kallweit @ 2017-04-12 19:34 UTC (permalink / raw)
To: Mauro Carvalho Chehab, Sean Young, Kevin Hilman, Neil Armstrong
Cc: linux-media, linux-amlogic
Switch the interrupt description to the default which is the of node
name. This is more in line with the interrupt descriptions in
other meson drivers.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
v2:
- no changes
---
drivers/media/rc/meson-ir.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
index 1c72593d..1ece3c04 100644
--- a/drivers/media/rc/meson-ir.c
+++ b/drivers/media/rc/meson-ir.c
@@ -155,7 +155,7 @@ static int meson_ir_probe(struct platform_device *pdev)
return ret;
}
- ret = devm_request_irq(dev, irq, meson_ir_irq, 0, "ir-meson", ir);
+ ret = devm_request_irq(dev, irq, meson_ir_irq, 0, NULL, ir);
if (ret) {
dev_err(dev, "failed to request irq\n");
return ret;
--
2.12.2
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH v2 5/5] media: rc: meson-ir: change irq name to to of node name
@ 2017-04-12 19:34 ` Heiner Kallweit
0 siblings, 0 replies; 12+ messages in thread
From: Heiner Kallweit @ 2017-04-12 19:34 UTC (permalink / raw)
To: linus-amlogic
Switch the interrupt description to the default which is the of node
name. This is more in line with the interrupt descriptions in
other meson drivers.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
v2:
- no changes
---
drivers/media/rc/meson-ir.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/rc/meson-ir.c b/drivers/media/rc/meson-ir.c
index 1c72593d..1ece3c04 100644
--- a/drivers/media/rc/meson-ir.c
+++ b/drivers/media/rc/meson-ir.c
@@ -155,7 +155,7 @@ static int meson_ir_probe(struct platform_device *pdev)
return ret;
}
- ret = devm_request_irq(dev, irq, meson_ir_irq, 0, "ir-meson", ir);
+ ret = devm_request_irq(dev, irq, meson_ir_irq, 0, NULL, ir);
if (ret) {
dev_err(dev, "failed to request irq\n");
return ret;
--
2.12.2
^ permalink raw reply related [flat|nested] 12+ messages in thread