Re: [PATCH-v4 2/3] mfd: 88pm800: Set default interrupt clear method
From: Vaibhav Hiremath
Date: Thu Jun 25 2015 - 11:31:42 EST
On Thursday 25 June 2015 08:16 PM, Lee Jones wrote:
On Thu, 25 Jun 2015, Vaibhav Hiremath wrote:
On Thursday 25 June 2015 03:56 PM, Lee Jones wrote:
On Thu, 25 Jun 2015, Vaibhav Hiremath wrote:
As per the spec, bit 1 (INT_CLEAR_MODE) of reg addr 0xe
(page 0) controls the method of clearing interrupt
status of 88pm800 family of devices;
0: clear on read
1: clear on write
If pdata is not coming from board file, then set the
default irq clear method to "irq clear on write"
Also, as suggested by "Lee Jones" renaming variable field
to appropriate name.
Signed-off-by: Zhao Ye <zhaoy@xxxxxxxxxxx>
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@xxxxxxxxxx>
---
drivers/mfd/88pm800.c | 15 ++++++++++-----
include/linux/mfd/88pm80x.h | 6 ++++--
2 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/drivers/mfd/88pm800.c b/drivers/mfd/88pm800.c
index 40fd014..e0cd7ad 100644
--- a/drivers/mfd/88pm800.c
+++ b/drivers/mfd/88pm800.c
[...]
+ PM800_WAKEUP2_INT_WRITE_CLEAR : PM800_WAKEUP2_INT_READ_CLEAR;
+ ret = regmap_update_bits(map, PM800_WAKEUP2, mask, irq_clr_mode);
if (ret < 0)
goto out;
@@ -514,6 +515,7 @@ static int device_800_init(struct pm80x_chip *chip,
}
chip->regmap_irq_chip = &pm800_irq_chip;
+ chip->irq_clr_on_wr = pdata->irq_clr_on_wr;
You have protection around pdata everywhere else in the file, I
suggest you supply some here too.
Actually it is not really needed, as the PATCH 1/1 introduces
if (!pdata && !np) {
dev_err(&client->dev,
"pm80x requires platform data or of_node\n");
return -EINVAL;
}
if (!pdata && !np) {
dev_err(&client->dev,
"pm80x requires platform data or of_node\n");
return -EINVAL;
}
So there is no way you can have pdata = NULL beyond this point.
I saw that. I want you to remove that too.
You mean, remove existing protection in the driver?
I will create a separate patch for this.
[...]
--- a/include/linux/mfd/88pm80x.h
+++ b/include/linux/mfd/88pm80x.h
@@ -77,6 +77,8 @@ enum {
#define PM800_WAKEUP2 (0x0E)
#define PM800_WAKEUP2_INV_INT (1 << 0)
#define PM800_WAKEUP2_INT_CLEAR (1 << 1)
+#define PM800_WAKEUP2_INT_READ_CLEAR (0 << 1)
+#define PM800_WAKEUP2_INT_WRITE_CLEAR (1 << 1)
#define PM800_WAKEUP2_INT_MASK (1 << 2)
Use the BIT() macro.
I thought about this, but the whole file doesn't use it, so I also
chose not to.
Then the whole file needs moving over.
Patches accepted.
Will change the driver and submit the patch.
#define PM800_POWER_UP_LOG (0x10)
@@ -300,7 +302,7 @@ struct pm80x_chip {
struct regmap_irq_chip_data *irq_data;
int type;
int irq;
- int irq_mode;
+ int irq_clr_on_wr; /* '1': Clear on write, '0': Clear on read*/
Whitespace issue.
Didn't see any...and I also ran checkpatch.
You have no space before the '*/'.
Shouldn't this be a bool?
Just was not sure about any older board file interface.
Ideally it should be bool only.
Right.
Actually even better, I would define; CLR_ON_WRITE and CLR_ON_READ,
and call the variable irq_clear_method, or something.
Much clearer that way I think.
We have slowly decided to almost hardcode it to one value if there is
no board file. I feel we should just keep it to simple.
If you still insist, I can implement.
I like clarity and by your own admission (by warranting an additional
comment) it's not clear. Please make it as clear as you can.
OK, will change the code for CLEAR_ON_READ and CLEAR_ON_WRITE.
Thanks,
Vaibhav
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