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[PATCH v3 1/5] soc: mediatek: pwrap: Use readx_poll_timeout() instead of custom function

AngeloGioacchino Del Regno posted 5 patches 3 years, 8 months ago
There is a newer version of this series
[PATCH v3 1/5] soc: mediatek: pwrap: Use readx_poll_timeout() instead of custom function
Posted by AngeloGioacchino Del Regno 3 years, 8 months ago 
Function pwrap_wait_for_state() is a function that polls an address
through a helper function, but this is the very same operation that
the readx_poll_timeout macro means to do.
Convert all instances of calling pwrap_wait_for_state() to instead
use the read_poll_timeout macro.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Tested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
---
 drivers/soc/mediatek/mtk-pmic-wrap.c | 60 +++++++++++++++-------------
 1 file changed, 33 insertions(+), 27 deletions(-)

diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
index bf39a64f3ecc..54a5300ab72b 100644
--- a/drivers/soc/mediatek/mtk-pmic-wrap.c
+++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
@@ -13,6 +13,9 @@
 #include <linux/regmap.h>
 #include <linux/reset.h>
 
+#define PWRAP_POLL_DELAY_US	10
+#define PWRAP_POLL_TIMEOUT_US	10000
+
 #define PWRAP_MT8135_BRIDGE_IORD_ARB_EN		0x4
 #define PWRAP_MT8135_BRIDGE_WACS3_EN		0x10
 #define PWRAP_MT8135_BRIDGE_INIT_DONE3		0x14
@@ -1241,27 +1244,14 @@ static bool pwrap_is_fsm_idle_and_sync_idle(struct pmic_wrapper *wrp)
 		(val & PWRAP_STATE_SYNC_IDLE0);
 }
 
-static int pwrap_wait_for_state(struct pmic_wrapper *wrp,
-		bool (*fp)(struct pmic_wrapper *))
-{
-	unsigned long timeout;
-
-	timeout = jiffies + usecs_to_jiffies(10000);
-
-	do {
-		if (time_after(jiffies, timeout))
-			return fp(wrp) ? 0 : -ETIMEDOUT;
-		if (fp(wrp))
-			return 0;
-	} while (1);
-}
-
 static int pwrap_read16(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
 {
+	bool tmp;
 	int ret;
 	u32 val;
 
-	ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
+	ret = readx_poll_timeout(pwrap_is_fsm_idle, wrp, tmp, tmp,
+				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
 	if (ret) {
 		pwrap_leave_fsm_vldclr(wrp);
 		return ret;
@@ -1273,7 +1263,8 @@ static int pwrap_read16(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
 		val = (adr >> 1) << 16;
 	pwrap_writel(wrp, val, PWRAP_WACS2_CMD);
 
-	ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_vldclr);
+	ret = readx_poll_timeout(pwrap_is_fsm_vldclr, wrp, tmp, tmp,
+				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
 	if (ret)
 		return ret;
 
@@ -1290,11 +1281,14 @@ static int pwrap_read16(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
 
 static int pwrap_read32(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
 {
+	bool tmp;
 	int ret, msb;
 
 	*rdata = 0;
 	for (msb = 0; msb < 2; msb++) {
-		ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
+		ret = readx_poll_timeout(pwrap_is_fsm_idle, wrp, tmp, tmp,
+					 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
+
 		if (ret) {
 			pwrap_leave_fsm_vldclr(wrp);
 			return ret;
@@ -1303,7 +1297,8 @@ static int pwrap_read32(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
 		pwrap_writel(wrp, ((msb << 30) | (adr << 16)),
 			     PWRAP_WACS2_CMD);
 
-		ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_vldclr);
+		ret = readx_poll_timeout(pwrap_is_fsm_vldclr, wrp, tmp, tmp,
+					 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
 		if (ret)
 			return ret;
 
@@ -1323,9 +1318,11 @@ static int pwrap_read(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
 
 static int pwrap_write16(struct pmic_wrapper *wrp, u32 adr, u32 wdata)
 {
+	bool tmp;
 	int ret;
 
-	ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
+	ret = readx_poll_timeout(pwrap_is_fsm_idle, wrp, tmp, tmp,
+				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
 	if (ret) {
 		pwrap_leave_fsm_vldclr(wrp);
 		return ret;
@@ -1344,10 +1341,12 @@ static int pwrap_write16(struct pmic_wrapper *wrp, u32 adr, u32 wdata)
 
 static int pwrap_write32(struct pmic_wrapper *wrp, u32 adr, u32 wdata)
 {
+	bool tmp;
 	int ret, msb, rdata;
 
 	for (msb = 0; msb < 2; msb++) {
-		ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
+		ret = readx_poll_timeout(pwrap_is_fsm_idle, wrp, tmp, tmp,
+					 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
 		if (ret) {
 			pwrap_leave_fsm_vldclr(wrp);
 			return ret;
@@ -1388,6 +1387,7 @@ static int pwrap_regmap_write(void *context, u32 adr, u32 wdata)
 
 static int pwrap_reset_spislave(struct pmic_wrapper *wrp)
 {
+	bool tmp;
 	int ret, i;
 
 	pwrap_writel(wrp, 0, PWRAP_HIPRIO_ARB_EN);
@@ -1407,7 +1407,8 @@ static int pwrap_reset_spislave(struct pmic_wrapper *wrp)
 		pwrap_writel(wrp, wrp->master->spi_w | PWRAP_MAN_CMD_OP_OUTS,
 				PWRAP_MAN_CMD);
 
-	ret = pwrap_wait_for_state(wrp, pwrap_is_sync_idle);
+	ret = readx_poll_timeout(pwrap_is_sync_idle, wrp, tmp, tmp,
+				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
 	if (ret) {
 		dev_err(wrp->dev, "%s fail, ret=%d\n", __func__, ret);
 		return ret;
@@ -1458,14 +1459,15 @@ static int pwrap_init_sidly(struct pmic_wrapper *wrp)
 static int pwrap_init_dual_io(struct pmic_wrapper *wrp)
 {
 	int ret;
+	bool tmp;
 	u32 rdata;
 
 	/* Enable dual IO mode */
 	pwrap_write(wrp, wrp->slave->dew_regs[PWRAP_DEW_DIO_EN], 1);
 
 	/* Check IDLE & INIT_DONE in advance */
-	ret = pwrap_wait_for_state(wrp,
-				   pwrap_is_fsm_idle_and_sync_idle);
+	ret = readx_poll_timeout(pwrap_is_fsm_idle_and_sync_idle, wrp, tmp, tmp,
+				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
 	if (ret) {
 		dev_err(wrp->dev, "%s fail, ret=%d\n", __func__, ret);
 		return ret;
@@ -1570,6 +1572,7 @@ static bool pwrap_is_pmic_cipher_ready(struct pmic_wrapper *wrp)
 static int pwrap_init_cipher(struct pmic_wrapper *wrp)
 {
 	int ret;
+	bool tmp;
 	u32 rdata = 0;
 
 	pwrap_writel(wrp, 0x1, PWRAP_CIPHER_SWRST);
@@ -1624,14 +1627,16 @@ static int pwrap_init_cipher(struct pmic_wrapper *wrp)
 	}
 
 	/* wait for cipher data ready@AP */
-	ret = pwrap_wait_for_state(wrp, pwrap_is_cipher_ready);
+	ret = readx_poll_timeout(pwrap_is_cipher_ready, wrp, tmp, tmp,
+				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
 	if (ret) {
 		dev_err(wrp->dev, "cipher data ready@AP fail, ret=%d\n", ret);
 		return ret;
 	}
 
 	/* wait for cipher data ready@PMIC */
-	ret = pwrap_wait_for_state(wrp, pwrap_is_pmic_cipher_ready);
+	ret = readx_poll_timeout(pwrap_is_pmic_cipher_ready, wrp, tmp, tmp,
+				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
 	if (ret) {
 		dev_err(wrp->dev,
 			"timeout waiting for cipher data ready@PMIC\n");
@@ -1640,7 +1645,8 @@ static int pwrap_init_cipher(struct pmic_wrapper *wrp)
 
 	/* wait for cipher mode idle */
 	pwrap_write(wrp, wrp->slave->dew_regs[PWRAP_DEW_CIPHER_MODE], 0x1);
-	ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle_and_sync_idle);
+	ret = readx_poll_timeout(pwrap_is_fsm_idle_and_sync_idle, wrp, tmp, tmp,
+				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
 	if (ret) {
 		dev_err(wrp->dev, "cipher mode idle fail, ret=%d\n", ret);
 		return ret;
-- 
2.35.1
Re: [PATCH v3 1/5] soc: mediatek: pwrap: Use readx_poll_timeout() instead of custom function
Posted by Matthias Brugger 3 years, 8 months ago 

On 16/05/2022 14:46, AngeloGioacchino Del Regno wrote:
> Function pwrap_wait_for_state() is a function that polls an address
> through a helper function, but this is the very same operation that
> the readx_poll_timeout macro means to do.
> Convert all instances of calling pwrap_wait_for_state() to instead
> use the read_poll_timeout macro.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
> Tested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
> ---
>   drivers/soc/mediatek/mtk-pmic-wrap.c | 60 +++++++++++++++-------------
>   1 file changed, 33 insertions(+), 27 deletions(-)
> 
> diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
> index bf39a64f3ecc..54a5300ab72b 100644
> --- a/drivers/soc/mediatek/mtk-pmic-wrap.c
> +++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
> @@ -13,6 +13,9 @@
>   #include <linux/regmap.h>
>   #include <linux/reset.h>
>   
> +#define PWRAP_POLL_DELAY_US	10
> +#define PWRAP_POLL_TIMEOUT_US	10000
> +
>   #define PWRAP_MT8135_BRIDGE_IORD_ARB_EN		0x4
>   #define PWRAP_MT8135_BRIDGE_WACS3_EN		0x10
>   #define PWRAP_MT8135_BRIDGE_INIT_DONE3		0x14
> @@ -1241,27 +1244,14 @@ static bool pwrap_is_fsm_idle_and_sync_idle(struct pmic_wrapper *wrp)
>   		(val & PWRAP_STATE_SYNC_IDLE0);
>   }
>   
> -static int pwrap_wait_for_state(struct pmic_wrapper *wrp,
> -		bool (*fp)(struct pmic_wrapper *))
> -{
> -	unsigned long timeout;
> -
> -	timeout = jiffies + usecs_to_jiffies(10000);
> -
> -	do {
> -		if (time_after(jiffies, timeout))
> -			return fp(wrp) ? 0 : -ETIMEDOUT;
> -		if (fp(wrp))
> -			return 0;
> -	} while (1);
> -}
> -
>   static int pwrap_read16(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
>   {
> +	bool tmp;
>   	int ret;
>   	u32 val;
>   
> -	ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
> +	ret = readx_poll_timeout(pwrap_is_fsm_idle, wrp, tmp, tmp,

hm, if we make the cond (tmp > 0) that would help to understand the code. At 
least I had to think about it for a moment. But I leave it to you if you think 
it's worth the effort.

Regards,
Matthias

> +				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
>   	if (ret) {
>   		pwrap_leave_fsm_vldclr(wrp);
>   		return ret;
> @@ -1273,7 +1263,8 @@ static int pwrap_read16(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
>   		val = (adr >> 1) << 16;
>   	pwrap_writel(wrp, val, PWRAP_WACS2_CMD);
>   
> -	ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_vldclr);
> +	ret = readx_poll_timeout(pwrap_is_fsm_vldclr, wrp, tmp, tmp,
> +				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
>   	if (ret)
>   		return ret;
>   
> @@ -1290,11 +1281,14 @@ static int pwrap_read16(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
>   
>   static int pwrap_read32(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
>   {
> +	bool tmp;
>   	int ret, msb;
>   
>   	*rdata = 0;
>   	for (msb = 0; msb < 2; msb++) {
> -		ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
> +		ret = readx_poll_timeout(pwrap_is_fsm_idle, wrp, tmp, tmp,
> +					 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
> +
>   		if (ret) {
>   			pwrap_leave_fsm_vldclr(wrp);
>   			return ret;
> @@ -1303,7 +1297,8 @@ static int pwrap_read32(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
>   		pwrap_writel(wrp, ((msb << 30) | (adr << 16)),
>   			     PWRAP_WACS2_CMD);
>   
> -		ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_vldclr);
> +		ret = readx_poll_timeout(pwrap_is_fsm_vldclr, wrp, tmp, tmp,
> +					 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
>   		if (ret)
>   			return ret;
>   
> @@ -1323,9 +1318,11 @@ static int pwrap_read(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
>   
>   static int pwrap_write16(struct pmic_wrapper *wrp, u32 adr, u32 wdata)
>   {
> +	bool tmp;
>   	int ret;
>   
> -	ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
> +	ret = readx_poll_timeout(pwrap_is_fsm_idle, wrp, tmp, tmp,
> +				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
>   	if (ret) {
>   		pwrap_leave_fsm_vldclr(wrp);
>   		return ret;
> @@ -1344,10 +1341,12 @@ static int pwrap_write16(struct pmic_wrapper *wrp, u32 adr, u32 wdata)
>   
>   static int pwrap_write32(struct pmic_wrapper *wrp, u32 adr, u32 wdata)
>   {
> +	bool tmp;
>   	int ret, msb, rdata;
>   
>   	for (msb = 0; msb < 2; msb++) {
> -		ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
> +		ret = readx_poll_timeout(pwrap_is_fsm_idle, wrp, tmp, tmp,
> +					 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
>   		if (ret) {
>   			pwrap_leave_fsm_vldclr(wrp);
>   			return ret;
> @@ -1388,6 +1387,7 @@ static int pwrap_regmap_write(void *context, u32 adr, u32 wdata)
>   
>   static int pwrap_reset_spislave(struct pmic_wrapper *wrp)
>   {
> +	bool tmp;
>   	int ret, i;
>   
>   	pwrap_writel(wrp, 0, PWRAP_HIPRIO_ARB_EN);
> @@ -1407,7 +1407,8 @@ static int pwrap_reset_spislave(struct pmic_wrapper *wrp)
>   		pwrap_writel(wrp, wrp->master->spi_w | PWRAP_MAN_CMD_OP_OUTS,
>   				PWRAP_MAN_CMD);
>   
> -	ret = pwrap_wait_for_state(wrp, pwrap_is_sync_idle);
> +	ret = readx_poll_timeout(pwrap_is_sync_idle, wrp, tmp, tmp,
> +				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
>   	if (ret) {
>   		dev_err(wrp->dev, "%s fail, ret=%d\n", __func__, ret);
>   		return ret;
> @@ -1458,14 +1459,15 @@ static int pwrap_init_sidly(struct pmic_wrapper *wrp)
>   static int pwrap_init_dual_io(struct pmic_wrapper *wrp)
>   {
>   	int ret;
> +	bool tmp;
>   	u32 rdata;
>   
>   	/* Enable dual IO mode */
>   	pwrap_write(wrp, wrp->slave->dew_regs[PWRAP_DEW_DIO_EN], 1);
>   
>   	/* Check IDLE & INIT_DONE in advance */
> -	ret = pwrap_wait_for_state(wrp,
> -				   pwrap_is_fsm_idle_and_sync_idle);
> +	ret = readx_poll_timeout(pwrap_is_fsm_idle_and_sync_idle, wrp, tmp, tmp,
> +				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
>   	if (ret) {
>   		dev_err(wrp->dev, "%s fail, ret=%d\n", __func__, ret);
>   		return ret;
> @@ -1570,6 +1572,7 @@ static bool pwrap_is_pmic_cipher_ready(struct pmic_wrapper *wrp)
>   static int pwrap_init_cipher(struct pmic_wrapper *wrp)
>   {
>   	int ret;
> +	bool tmp;
>   	u32 rdata = 0;
>   
>   	pwrap_writel(wrp, 0x1, PWRAP_CIPHER_SWRST);
> @@ -1624,14 +1627,16 @@ static int pwrap_init_cipher(struct pmic_wrapper *wrp)
>   	}
>   
>   	/* wait for cipher data ready@AP */
> -	ret = pwrap_wait_for_state(wrp, pwrap_is_cipher_ready);
> +	ret = readx_poll_timeout(pwrap_is_cipher_ready, wrp, tmp, tmp,
> +				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
>   	if (ret) {
>   		dev_err(wrp->dev, "cipher data ready@AP fail, ret=%d\n", ret);
>   		return ret;
>   	}
>   
>   	/* wait for cipher data ready@PMIC */
> -	ret = pwrap_wait_for_state(wrp, pwrap_is_pmic_cipher_ready);
> +	ret = readx_poll_timeout(pwrap_is_pmic_cipher_ready, wrp, tmp, tmp,
> +				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
>   	if (ret) {
>   		dev_err(wrp->dev,
>   			"timeout waiting for cipher data ready@PMIC\n");
> @@ -1640,7 +1645,8 @@ static int pwrap_init_cipher(struct pmic_wrapper *wrp)
>   
>   	/* wait for cipher mode idle */
>   	pwrap_write(wrp, wrp->slave->dew_regs[PWRAP_DEW_CIPHER_MODE], 0x1);
> -	ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle_and_sync_idle);
> +	ret = readx_poll_timeout(pwrap_is_fsm_idle_and_sync_idle, wrp, tmp, tmp,
> +				 PWRAP_POLL_DELAY_US, PWRAP_POLL_TIMEOUT_US);
>   	if (ret) {
>   		dev_err(wrp->dev, "cipher mode idle fail, ret=%d\n", ret);
>   		return ret;
Re: [PATCH v3 1/5] soc: mediatek: pwrap: Use readx_poll_timeout() instead of custom function
Posted by AngeloGioacchino Del Regno 3 years, 8 months ago 
Il 17/05/22 11:25, Matthias Brugger ha scritto:
> 
> 
> On 16/05/2022 14:46, AngeloGioacchino Del Regno wrote:
>> Function pwrap_wait_for_state() is a function that polls an address
>> through a helper function, but this is the very same operation that
>> the readx_poll_timeout macro means to do.
>> Convert all instances of calling pwrap_wait_for_state() to instead
>> use the read_poll_timeout macro.
>>
>> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
>> Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
>> Tested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
>> ---
>>   drivers/soc/mediatek/mtk-pmic-wrap.c | 60 +++++++++++++++-------------
>>   1 file changed, 33 insertions(+), 27 deletions(-)
>>
>> diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c 
>> b/drivers/soc/mediatek/mtk-pmic-wrap.c
>> index bf39a64f3ecc..54a5300ab72b 100644
>> --- a/drivers/soc/mediatek/mtk-pmic-wrap.c
>> +++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
>> @@ -13,6 +13,9 @@
>>   #include <linux/regmap.h>
>>   #include <linux/reset.h>
>> +#define PWRAP_POLL_DELAY_US    10
>> +#define PWRAP_POLL_TIMEOUT_US    10000
>> +
>>   #define PWRAP_MT8135_BRIDGE_IORD_ARB_EN        0x4
>>   #define PWRAP_MT8135_BRIDGE_WACS3_EN        0x10
>>   #define PWRAP_MT8135_BRIDGE_INIT_DONE3        0x14
>> @@ -1241,27 +1244,14 @@ static bool pwrap_is_fsm_idle_and_sync_idle(struct 
>> pmic_wrapper *wrp)
>>           (val & PWRAP_STATE_SYNC_IDLE0);
>>   }
>> -static int pwrap_wait_for_state(struct pmic_wrapper *wrp,
>> -        bool (*fp)(struct pmic_wrapper *))
>> -{
>> -    unsigned long timeout;
>> -
>> -    timeout = jiffies + usecs_to_jiffies(10000);
>> -
>> -    do {
>> -        if (time_after(jiffies, timeout))
>> -            return fp(wrp) ? 0 : -ETIMEDOUT;
>> -        if (fp(wrp))
>> -            return 0;
>> -    } while (1);
>> -}
>> -
>>   static int pwrap_read16(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
>>   {
>> +    bool tmp;
>>       int ret;
>>       u32 val;
>> -    ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
>> +    ret = readx_poll_timeout(pwrap_is_fsm_idle, wrp, tmp, tmp,
> 
> hm, if we make the cond (tmp > 0) that would help to understand the code. At least 
> I had to think about it for a moment. But I leave it to you if you think it's worth 
> the effort.
> 

I would prefer size over readability in this case... if we do (tmp > 0), it would
be incorrect to keep tmp as a `bool`, we would have to set it as an integer var,
which is unnecessarily bigger (that's the reason why I wrote it like so!).

Another way to increase human readability would be to do (tmp == true), but it
looks a bit weird to me, doesn't it?
If you disagree about that looking weird, though, I can go with that one, perhaps!

Cheers,
Angelo
Re: [PATCH v3 1/5] soc: mediatek: pwrap: Use readx_poll_timeout() instead of custom function
Posted by Matthias Brugger 3 years, 8 months ago 

On 17/05/2022 11:41, AngeloGioacchino Del Regno wrote:
> Il 17/05/22 11:25, Matthias Brugger ha scritto:
>>
>>
>> On 16/05/2022 14:46, AngeloGioacchino Del Regno wrote:
>>> Function pwrap_wait_for_state() is a function that polls an address
>>> through a helper function, but this is the very same operation that
>>> the readx_poll_timeout macro means to do.
>>> Convert all instances of calling pwrap_wait_for_state() to instead
>>> use the read_poll_timeout macro.
>>>
>>> Signed-off-by: AngeloGioacchino Del Regno 
>>> <angelogioacchino.delregno@collabora.com>
>>> Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
>>> Tested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
>>> ---
>>>   drivers/soc/mediatek/mtk-pmic-wrap.c | 60 +++++++++++++++-------------
>>>   1 file changed, 33 insertions(+), 27 deletions(-)
>>>
>>> diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c 
>>> b/drivers/soc/mediatek/mtk-pmic-wrap.c
>>> index bf39a64f3ecc..54a5300ab72b 100644
>>> --- a/drivers/soc/mediatek/mtk-pmic-wrap.c
>>> +++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
>>> @@ -13,6 +13,9 @@
>>>   #include <linux/regmap.h>
>>>   #include <linux/reset.h>
>>> +#define PWRAP_POLL_DELAY_US    10
>>> +#define PWRAP_POLL_TIMEOUT_US    10000
>>> +
>>>   #define PWRAP_MT8135_BRIDGE_IORD_ARB_EN        0x4
>>>   #define PWRAP_MT8135_BRIDGE_WACS3_EN        0x10
>>>   #define PWRAP_MT8135_BRIDGE_INIT_DONE3        0x14
>>> @@ -1241,27 +1244,14 @@ static bool pwrap_is_fsm_idle_and_sync_idle(struct 
>>> pmic_wrapper *wrp)
>>>           (val & PWRAP_STATE_SYNC_IDLE0);
>>>   }
>>> -static int pwrap_wait_for_state(struct pmic_wrapper *wrp,
>>> -        bool (*fp)(struct pmic_wrapper *))
>>> -{
>>> -    unsigned long timeout;
>>> -
>>> -    timeout = jiffies + usecs_to_jiffies(10000);
>>> -
>>> -    do {
>>> -        if (time_after(jiffies, timeout))
>>> -            return fp(wrp) ? 0 : -ETIMEDOUT;
>>> -        if (fp(wrp))
>>> -            return 0;
>>> -    } while (1);
>>> -}
>>> -
>>>   static int pwrap_read16(struct pmic_wrapper *wrp, u32 adr, u32 *rdata)
>>>   {
>>> +    bool tmp;
>>>       int ret;
>>>       u32 val;
>>> -    ret = pwrap_wait_for_state(wrp, pwrap_is_fsm_idle);
>>> +    ret = readx_poll_timeout(pwrap_is_fsm_idle, wrp, tmp, tmp,
>>
>> hm, if we make the cond (tmp > 0) that would help to understand the code. At 
>> least I had to think about it for a moment. But I leave it to you if you think 
>> it's worth the effort.
>>
> 
> I would prefer size over readability in this case... if we do (tmp > 0), it would
> be incorrect to keep tmp as a `bool`, we would have to set it as an integer var,
> which is unnecessarily bigger (that's the reason why I wrote it like so!).
> 
> Another way to increase human readability would be to do (tmp == true), but it
> looks a bit weird to me, doesn't it?
> If you disagree about that looking weird, though, I can go with that one, perhaps!
> 

You are right, just leave it as it is.

Regards,
Matthias

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