[PATCH v2 0/3] MediaTek PMIC Wrap improvements and cleanups

[PATCH v2 0/3] MediaTek PMIC Wrap improvements and cleanups

[AngeloGioacchino Del Regno]

This series is meant to improve the mtk-pmic-wrap driver;
that's done by removing the custom pwrap_wait_for_state() function
and correctly using the readx_poll_timeout macro instead, which is
doing exactly the same as the former.

As also shown in a patch [1] by Zhiyong Tao (MediaTek), performing
a tight loop is not desired: because of the operation timing in the
SPMI PMICs on these platforms, it makes more sense to wait for some
microseconds before trying to read again, reducing CPU busy time
around these state waits. For this purpose, a ~10uS delay was chosen.

While at it, I also took the occasion to tidy up this driver a
little by optimizing its probe() function.

[1]: https://patchwork.kernel.org/project/linux-mediatek/patch/20220329115824.13005-2-zhiyong.tao@mediatek.com/

Changes in v2:
 - Fixed a critical typo in patch 1/3. Thanks Nicolas!

AngeloGioacchino Del Regno (3):
  soc: mediatek: pwrap: Use readx_poll_timeout() instead of custom
    function
  soc: mediatek: pwrap: Switch to
    devm_platform_ioremap_resource_byname()
  soc: mediatek: pwrap: Move and check return value of
    platform_get_irq()

 drivers/soc/mediatek/mtk-pmic-wrap.c | 73 +++++++++++++++-------------
 1 file changed, 39 insertions(+), 34 deletions(-)

-- 
2.35.1

[PATCH v2 1/3] soc: mediatek: pwrap: Use readx_poll_timeout() instead of custom function

[AngeloGioacchino Del Regno]

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>
---
 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

[PATCH v2 2/3] soc: mediatek: pwrap: Switch to devm_platform_ioremap_resource_byname()

[AngeloGioacchino Del Regno]

In order to simplify ioremapping resources, instead of calling
platform_get_resource_byname() and then devm_ioremap_resource(),
simply call devm_platform_ioremap_resource_byname().

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 drivers/soc/mediatek/mtk-pmic-wrap.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
index 54a5300ab72b..852514366f1f 100644
--- a/drivers/soc/mediatek/mtk-pmic-wrap.c
+++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
@@ -2191,7 +2191,6 @@ static int pwrap_probe(struct platform_device *pdev)
 	struct pmic_wrapper *wrp;
 	struct device_node *np = pdev->dev.of_node;
 	const struct of_device_id *of_slave_id = NULL;
-	struct resource *res;
 
 	if (np->child)
 		of_slave_id = of_match_node(of_slave_match_tbl, np->child);
@@ -2211,8 +2210,7 @@ static int pwrap_probe(struct platform_device *pdev)
 	wrp->slave = of_slave_id->data;
 	wrp->dev = &pdev->dev;
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pwrap");
-	wrp->base = devm_ioremap_resource(wrp->dev, res);
+	wrp->base = devm_platform_ioremap_resource_byname(pdev, "pwrap");
 	if (IS_ERR(wrp->base))
 		return PTR_ERR(wrp->base);
 
@@ -2226,9 +2224,7 @@ static int pwrap_probe(struct platform_device *pdev)
 	}
 
 	if (HAS_CAP(wrp->master->caps, PWRAP_CAP_BRIDGE)) {
-		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
-				"pwrap-bridge");
-		wrp->bridge_base = devm_ioremap_resource(wrp->dev, res);
+		wrp->bridge_base = devm_platform_ioremap_resource_byname(pdev, "pwrap-bridge");
 		if (IS_ERR(wrp->bridge_base))
 			return PTR_ERR(wrp->bridge_base);
 
-- 
2.35.1

[PATCH v2 3/3] soc: mediatek: pwrap: Move and check return value of platform_get_irq()

[AngeloGioacchino Del Regno]

Move the call to platform_get_irq() earlier in the probe function
and check for its return value: if no interrupt is specified, it
wouldn't make sense to try to call devm_request_irq() so, in that
case, we can simply return early.

Moving the platform_get_irq() call also makes it possible to use
one less goto, as clocks aren't required at that stage.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 drivers/soc/mediatek/mtk-pmic-wrap.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
index 852514366f1f..332cbcabc299 100644
--- a/drivers/soc/mediatek/mtk-pmic-wrap.c
+++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
@@ -2204,6 +2204,10 @@ static int pwrap_probe(struct platform_device *pdev)
 	if (!wrp)
 		return -ENOMEM;
 
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
 	platform_set_drvdata(pdev, wrp);
 
 	wrp->master = of_device_get_match_data(&pdev->dev);
@@ -2316,7 +2320,6 @@ static int pwrap_probe(struct platform_device *pdev)
 	if (HAS_CAP(wrp->master->caps, PWRAP_CAP_INT1_EN))
 		pwrap_writel(wrp, wrp->master->int1_en_all, PWRAP_INT1_EN);
 
-	irq = platform_get_irq(pdev, 0);
 	ret = devm_request_irq(wrp->dev, irq, pwrap_interrupt,
 			       IRQF_TRIGGER_HIGH,
 			       "mt-pmic-pwrap", wrp);
-- 
2.35.1

Re: [PATCH v2 1/3] soc: mediatek: pwrap: Use readx_poll_timeout() instead of custom function

[Nícolas F. R. A. Prado]

On Thu, Mar 31, 2022 at 09:58:15AM +0200, 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>

(tested on mt8192-asurada-spherion)

> ---
>  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 v2 2/3] soc: mediatek: pwrap: Switch to devm_platform_ioremap_resource_byname()

[Nícolas F. R. A. Prado]

On Thu, Mar 31, 2022 at 09:58:16AM +0200, AngeloGioacchino Del Regno wrote:
> In order to simplify ioremapping resources, instead of calling
> platform_get_resource_byname() and then devm_ioremap_resource(),
> simply call devm_platform_ioremap_resource_byname().
> 
> 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 | 8 ++------
>  1 file changed, 2 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
> index 54a5300ab72b..852514366f1f 100644
> --- a/drivers/soc/mediatek/mtk-pmic-wrap.c
> +++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
> @@ -2191,7 +2191,6 @@ static int pwrap_probe(struct platform_device *pdev)
>  	struct pmic_wrapper *wrp;
>  	struct device_node *np = pdev->dev.of_node;
>  	const struct of_device_id *of_slave_id = NULL;
> -	struct resource *res;
>  
>  	if (np->child)
>  		of_slave_id = of_match_node(of_slave_match_tbl, np->child);
> @@ -2211,8 +2210,7 @@ static int pwrap_probe(struct platform_device *pdev)
>  	wrp->slave = of_slave_id->data;
>  	wrp->dev = &pdev->dev;
>  
> -	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pwrap");
> -	wrp->base = devm_ioremap_resource(wrp->dev, res);
> +	wrp->base = devm_platform_ioremap_resource_byname(pdev, "pwrap");
>  	if (IS_ERR(wrp->base))
>  		return PTR_ERR(wrp->base);
>  
> @@ -2226,9 +2224,7 @@ static int pwrap_probe(struct platform_device *pdev)
>  	}
>  
>  	if (HAS_CAP(wrp->master->caps, PWRAP_CAP_BRIDGE)) {
> -		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> -				"pwrap-bridge");
> -		wrp->bridge_base = devm_ioremap_resource(wrp->dev, res);
> +		wrp->bridge_base = devm_platform_ioremap_resource_byname(pdev, "pwrap-bridge");
>  		if (IS_ERR(wrp->bridge_base))
>  			return PTR_ERR(wrp->bridge_base);
>  
> -- 
> 2.35.1
> 

Re: [PATCH v2 3/3] soc: mediatek: pwrap: Move and check return value of platform_get_irq()

[Nícolas F. R. A. Prado]

On Thu, Mar 31, 2022 at 09:58:17AM +0200, AngeloGioacchino Del Regno wrote:
> Move the call to platform_get_irq() earlier in the probe function
> and check for its return value: if no interrupt is specified, it
> wouldn't make sense to try to call devm_request_irq() so, in that
> case, we can simply return early.
> 
> Moving the platform_get_irq() call also makes it possible to use
> one less goto, as clocks aren't required at that stage.
> 
> 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 | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/soc/mediatek/mtk-pmic-wrap.c b/drivers/soc/mediatek/mtk-pmic-wrap.c
> index 852514366f1f..332cbcabc299 100644
> --- a/drivers/soc/mediatek/mtk-pmic-wrap.c
> +++ b/drivers/soc/mediatek/mtk-pmic-wrap.c
> @@ -2204,6 +2204,10 @@ static int pwrap_probe(struct platform_device *pdev)
>  	if (!wrp)
>  		return -ENOMEM;
>  
> +	irq = platform_get_irq(pdev, 0);
> +	if (irq < 0)
> +		return irq;
> +
>  	platform_set_drvdata(pdev, wrp);
>  
>  	wrp->master = of_device_get_match_data(&pdev->dev);
> @@ -2316,7 +2320,6 @@ static int pwrap_probe(struct platform_device *pdev)
>  	if (HAS_CAP(wrp->master->caps, PWRAP_CAP_INT1_EN))
>  		pwrap_writel(wrp, wrp->master->int1_en_all, PWRAP_INT1_EN);
>  
> -	irq = platform_get_irq(pdev, 0);
>  	ret = devm_request_irq(wrp->dev, irq, pwrap_interrupt,
>  			       IRQF_TRIGGER_HIGH,
>  			       "mt-pmic-pwrap", wrp);
> -- 
> 2.35.1
>