[PATCH net-next] mrf24j40: separate h/w init and add checkings

[PATCH net-next] mrf24j40: separate h/w init and add checkings

[Varka Bhadram]

separate the mrf24j40 hardware initialisation from probe()
and adds the sanity checkings.

These checkings are required if somebody hasn't a right spi configuration
the probe function should fail. So we have to return from there.

Signed-off-by: Varka Bhadram <varkab@cdac.in>
---
 drivers/net/ieee802154/mrf24j40.c |  115 ++++++++++++++++++++++++++++---------
 1 file changed, 89 insertions(+), 26 deletions(-)

diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c
index 4048062..9e6a124 100644
--- a/drivers/net/ieee802154/mrf24j40.c
+++ b/drivers/net/ieee802154/mrf24j40.c
@@ -610,10 +610,95 @@ out:
 	return IRQ_HANDLED;
 }
 
+static int mrf24j40_hw_init(struct mrf24j40 *devrec)
+{
+	int ret;
+	u8 val;
+
+	/* Initialize the device.
+		From datasheet section 3.2: Initialization. */
+	ret = write_short_reg(devrec, REG_SOFTRST, 0x07);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_PACON2, 0x98);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_TXSTBL, 0x95);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON0, 0x03);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON1, 0x01);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON2, 0x80);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON6, 0x90);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON7, 0x80);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON8, 0x10);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_SLPCON1, 0x21);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_BBREG2, 0x80);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_CCAEDTH, 0x60);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_BBREG6, 0x40);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_RFCTL, 0x04);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_RFCTL, 0x0);
+	if (ret)
+		goto err_ret;
+
+	udelay(192);
+
+	/* Set RX Mode. RXMCR<1:0>: 0x0 normal, 0x1 promisc, 0x2 error */
+	ret = read_short_reg(devrec, REG_RXMCR, &val);
+	if (ret)
+		goto err_ret;
+
+	val &= ~0x3; /* Clear RX mode (normal) */
+
+	ret = write_short_reg(devrec, REG_RXMCR, val);
+	if (ret)
+		goto err_ret;
+
+	return 0;
+
+err_ret:
+	return ret;
+}
+
 static int mrf24j40_probe(struct spi_device *spi)
 {
 	int ret = -ENOMEM;
-	u8 val;
 	struct mrf24j40 *devrec;
 
 	printk(KERN_INFO "mrf24j40: probe(). IRQ: %d\n", spi->irq);
@@ -650,31 +735,9 @@ static int mrf24j40_probe(struct spi_device *spi)
 	if (ret)
 		goto err_register_device;
 
-	/* Initialize the device.
-		From datasheet section 3.2: Initialization. */
-	write_short_reg(devrec, REG_SOFTRST, 0x07);
-	write_short_reg(devrec, REG_PACON2, 0x98);
-	write_short_reg(devrec, REG_TXSTBL, 0x95);
-	write_long_reg(devrec, REG_RFCON0, 0x03);
-	write_long_reg(devrec, REG_RFCON1, 0x01);
-	write_long_reg(devrec, REG_RFCON2, 0x80);
-	write_long_reg(devrec, REG_RFCON6, 0x90);
-	write_long_reg(devrec, REG_RFCON7, 0x80);
-	write_long_reg(devrec, REG_RFCON8, 0x10);
-	write_long_reg(devrec, REG_SLPCON1, 0x21);
-	write_short_reg(devrec, REG_BBREG2, 0x80);
-	write_short_reg(devrec, REG_CCAEDTH, 0x60);
-	write_short_reg(devrec, REG_BBREG6, 0x40);
-	write_short_reg(devrec, REG_RFCTL, 0x04);
-	write_short_reg(devrec, REG_RFCTL, 0x0);
-	udelay(192);
-
-	/* Set RX Mode. RXMCR<1:0>: 0x0 normal, 0x1 promisc, 0x2 error */
-	ret = read_short_reg(devrec, REG_RXMCR, &val);
+	ret = mrf24j40_hw_init(devrec);
 	if (ret)
-		goto err_read_reg;
-	val &= ~0x3; /* Clear RX mode (normal) */
-	write_short_reg(devrec, REG_RXMCR, val);
+		goto err_hw_init;
 
 	ret = devm_request_threaded_irq(&spi->dev,
 					spi->irq,
@@ -692,7 +755,7 @@ static int mrf24j40_probe(struct spi_device *spi)
 	return 0;
 
 err_irq:
-err_read_reg:
+err_hw_init:
 	ieee802154_unregister_device(devrec->dev);
 err_register_device:
 	ieee802154_free_device(devrec->dev);
-- 
1.7.9.5

Re: [PATCH net-next] mrf24j40: separate h/w init and add checkings

[David Miller]

From: Varka Bhadram <varkabhadram@gmail.com>
Date: Mon, 16 Jun 2014 09:12:31 +0530

> separate the mrf24j40 hardware initialisation from probe()
> and adds the sanity checkings.
> 
> These checkings are required if somebody hasn't a right spi configuration
> the probe function should fail. So we have to return from there.
> 
> Signed-off-by: Varka Bhadram <varkab@cdac.in>

Applied.

[PATCH net-next] mrf24j40: separate h/w init and add checkings

[Varka Bhadram]

separate the mrf24j40 hardware initialisation from probe()
and adds the sanity checkings.

These checkings are required if somebody hasn't a right spi configuration
the probe function should fail. So we have to return from there.

Signed-off-by: Varka Bhadram <varkab@cdac.in>
---
 drivers/net/ieee802154/mrf24j40.c |  115 ++++++++++++++++++++++++++++---------
 1 file changed, 89 insertions(+), 26 deletions(-)

diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c
index 4048062..9e6a124 100644
--- a/drivers/net/ieee802154/mrf24j40.c
+++ b/drivers/net/ieee802154/mrf24j40.c
@@ -610,10 +610,95 @@ out:
 	return IRQ_HANDLED;
 }
 
+static int mrf24j40_hw_init(struct mrf24j40 *devrec)
+{
+	int ret;
+	u8 val;
+
+	/* Initialize the device.
+		From datasheet section 3.2: Initialization. */
+	ret = write_short_reg(devrec, REG_SOFTRST, 0x07);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_PACON2, 0x98);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_TXSTBL, 0x95);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON0, 0x03);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON1, 0x01);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON2, 0x80);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON6, 0x90);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON7, 0x80);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON8, 0x10);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_SLPCON1, 0x21);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_BBREG2, 0x80);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_CCAEDTH, 0x60);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_BBREG6, 0x40);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_RFCTL, 0x04);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_RFCTL, 0x0);
+	if (ret)
+		goto err_ret;
+
+	udelay(192);
+
+	/* Set RX Mode. RXMCR<1:0>: 0x0 normal, 0x1 promisc, 0x2 error */
+	ret = read_short_reg(devrec, REG_RXMCR, &val);
+	if (ret)
+		goto err_ret;
+
+	val &= ~0x3; /* Clear RX mode (normal) */
+
+	ret = write_short_reg(devrec, REG_RXMCR, val);
+	if (ret)
+		goto err_ret;
+
+	return 0;
+
+err_ret:
+	return ret;
+}
+
 static int mrf24j40_probe(struct spi_device *spi)
 {
 	int ret = -ENOMEM;
-	u8 val;
 	struct mrf24j40 *devrec;
 
 	printk(KERN_INFO "mrf24j40: probe(). IRQ: %d\n", spi->irq);
@@ -650,31 +735,9 @@ static int mrf24j40_probe(struct spi_device *spi)
 	if (ret)
 		goto err_register_device;
 
-	/* Initialize the device.
-		From datasheet section 3.2: Initialization. */
-	write_short_reg(devrec, REG_SOFTRST, 0x07);
-	write_short_reg(devrec, REG_PACON2, 0x98);
-	write_short_reg(devrec, REG_TXSTBL, 0x95);
-	write_long_reg(devrec, REG_RFCON0, 0x03);
-	write_long_reg(devrec, REG_RFCON1, 0x01);
-	write_long_reg(devrec, REG_RFCON2, 0x80);
-	write_long_reg(devrec, REG_RFCON6, 0x90);
-	write_long_reg(devrec, REG_RFCON7, 0x80);
-	write_long_reg(devrec, REG_RFCON8, 0x10);
-	write_long_reg(devrec, REG_SLPCON1, 0x21);
-	write_short_reg(devrec, REG_BBREG2, 0x80);
-	write_short_reg(devrec, REG_CCAEDTH, 0x60);
-	write_short_reg(devrec, REG_BBREG6, 0x40);
-	write_short_reg(devrec, REG_RFCTL, 0x04);
-	write_short_reg(devrec, REG_RFCTL, 0x0);
-	udelay(192);
-
-	/* Set RX Mode. RXMCR<1:0>: 0x0 normal, 0x1 promisc, 0x2 error */
-	ret = read_short_reg(devrec, REG_RXMCR, &val);
+	ret = mrf24j40_hw_init(devrec);
 	if (ret)
-		goto err_read_reg;
-	val &= ~0x3; /* Clear RX mode (normal) */
-	write_short_reg(devrec, REG_RXMCR, val);
+		goto err_hw_init;
 
 	ret = devm_request_threaded_irq(&spi->dev,
 					spi->irq,
@@ -692,7 +755,7 @@ static int mrf24j40_probe(struct spi_device *spi)
 	return 0;
 
 err_irq:
-err_read_reg:
+err_hw_init:
 	ieee802154_unregister_device(devrec->dev);
 err_register_device:
 	ieee802154_free_device(devrec->dev);
-- 
1.7.9.5

[PATCH net-next] mrf24j40: separate h/w init and add checkings

[Varka Bhadram]

separate the mrf24j40 hardware initialisation from probe()
and adds the sanity checkings.

These checkings are required if somebody hasn't a right spi configuration 
the probe function should fail. So we have to return from there.

Signed-off-by: Varka Bhadram <varkab@cdac.in>
---
 drivers/net/ieee802154/mrf24j40.c |  114 +++++++++++++++++++++++++++++--------
 1 file changed, 89 insertions(+), 25 deletions(-)

diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c
index 4048062..9574d10 100644
--- a/drivers/net/ieee802154/mrf24j40.c
+++ b/drivers/net/ieee802154/mrf24j40.c
@@ -610,6 +610,92 @@ out:
 	return IRQ_HANDLED;
 }
 
+static int mrf24j40_hw_init(struct mrf24j40 *devrec)
+{
+	int ret;
+	u8 val;
+
+	/* Initialize the device.
+		From datasheet section 3.2: Initialization. */
+	ret = write_short_reg(devrec, REG_SOFTRST, 0x07);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_PACON2, 0x98);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_TXSTBL, 0x95);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON0, 0x03);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON1, 0x01);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON2, 0x80);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON6, 0x90);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON7, 0x80);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_RFCON8, 0x10);
+	if (ret)
+		goto err_ret;
+
+	ret = write_long_reg(devrec, REG_SLPCON1, 0x21);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_BBREG2, 0x80);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_CCAEDTH, 0x60);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_BBREG6, 0x40);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_RFCTL, 0x04);
+	if (ret)
+		goto err_ret;
+
+	ret = write_short_reg(devrec, REG_RFCTL, 0x0);
+	if (ret)
+		goto err_ret;
+
+	udelay(192);
+
+	/* Set RX Mode. RXMCR<1:0>: 0x0 normal, 0x1 promisc, 0x2 error */
+	ret = read_short_reg(devrec, REG_RXMCR, &val);
+	if (ret)
+		goto err_ret;
+
+	val &= ~0x3; /* Clear RX mode (normal) */
+
+	ret = write_short_reg(devrec, REG_RXMCR, val);
+	if (ret)
+		goto err_ret;
+
+	return 0;
+
+err_ret:
+	return ret;
+}
+
 static int mrf24j40_probe(struct spi_device *spi)
 {
 	int ret = -ENOMEM;
@@ -650,31 +736,9 @@ static int mrf24j40_probe(struct spi_device *spi)
 	if (ret)
 		goto err_register_device;
 
-	/* Initialize the device.
-		From datasheet section 3.2: Initialization. */
-	write_short_reg(devrec, REG_SOFTRST, 0x07);
-	write_short_reg(devrec, REG_PACON2, 0x98);
-	write_short_reg(devrec, REG_TXSTBL, 0x95);
-	write_long_reg(devrec, REG_RFCON0, 0x03);
-	write_long_reg(devrec, REG_RFCON1, 0x01);
-	write_long_reg(devrec, REG_RFCON2, 0x80);
-	write_long_reg(devrec, REG_RFCON6, 0x90);
-	write_long_reg(devrec, REG_RFCON7, 0x80);
-	write_long_reg(devrec, REG_RFCON8, 0x10);
-	write_long_reg(devrec, REG_SLPCON1, 0x21);
-	write_short_reg(devrec, REG_BBREG2, 0x80);
-	write_short_reg(devrec, REG_CCAEDTH, 0x60);
-	write_short_reg(devrec, REG_BBREG6, 0x40);
-	write_short_reg(devrec, REG_RFCTL, 0x04);
-	write_short_reg(devrec, REG_RFCTL, 0x0);
-	udelay(192);
-
-	/* Set RX Mode. RXMCR<1:0>: 0x0 normal, 0x1 promisc, 0x2 error */
-	ret = read_short_reg(devrec, REG_RXMCR, &val);
+	ret = mrf24j40_hw_init(devrec);
 	if (ret)
-		goto err_read_reg;
-	val &= ~0x3; /* Clear RX mode (normal) */
-	write_short_reg(devrec, REG_RXMCR, val);
+		return err_hw_init;
 
 	ret = devm_request_threaded_irq(&spi->dev,
 					spi->irq,
@@ -692,7 +756,7 @@ static int mrf24j40_probe(struct spi_device *spi)
 	return 0;
 
 err_irq:
-err_read_reg:
+err_hw_init:
 	ieee802154_unregister_device(devrec->dev);
 err_register_device:
 	ieee802154_free_device(devrec->dev);
-- 
1.7.9.5

Re: [PATCH net-next] mrf24j40: separate h/w init and add checkings

[David Miller]

From: Varka Bhadram <varkabhadram@gmail.com>
Date: Thu, 12 Jun 2014 14:40:48 +0530

> separate the mrf24j40 hardware initialisation from probe()
> and adds the sanity checkings.
> 
> These checkings are required if somebody hasn't a right spi configuration 
> the probe function should fail. So we have to return from there.
> 
> Signed-off-by: Varka Bhadram <varkab@cdac.in>

Applied, thanks.

Re: [PATCH net-next] mrf24j40: separate h/w init and add checkings

[David Miller]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: Text/Plain; charset=iso-8859-7, Size: 1316 bytes --]

From: David Miller <davem@davemloft.net>
Date: Thu, 12 Jun 2014 11:03:24 -0700 (PDT)

> From: Varka Bhadram <varkabhadram@gmail.com>
> Date: Thu, 12 Jun 2014 14:40:48 +0530
> 
>> separate the mrf24j40 hardware initialisation from probe()
>> and adds the sanity checkings.
>> 
>> These checkings are required if somebody hasn't a right spi configuration 
>> the probe function should fail. So we have to return from there.
>> 
>> Signed-off-by: Varka Bhadram <varkab@cdac.in>
> 
> Applied, thanks.

Reverted, did you even compile test this change?

drivers/net/ieee802154/mrf24j40.c: In function ¡mrf24j40_probe¢:
drivers/net/ieee802154/mrf24j40.c:741:10: error: ¡err_hw_init¢ undeclared (first use in this function)
drivers/net/ieee802154/mrf24j40.c:741:10: note: each undeclared identifier is reported only once for each function it appears in
drivers/net/ieee802154/mrf24j40.c:759:1: warning: label ¡err_hw_init¢ defined but not used [-Wunused-label]
drivers/net/ieee802154/mrf24j40.c:702:5: warning: unused variable ¡val¢ [-Wunused-variable]
make[1]: *** [drivers/net/ieee802154/mrf24j40.o] Error 1
make: *** [drivers/net/ieee802154/mrf24j40.o] Error 2
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Re: [PATCH net-next] mrf24j40: separate h/w init and add checkings

[Varka Bhadram]

Hi David,

Sorry for the noise. i will send the fixed patch.

Thanks.

-Varka Bhadram

On Thu, Jun 12, 2014 at 11:35 PM, David Miller <davem@davemloft.net> wrote:
> From: David Miller <davem@davemloft.net>
> Date: Thu, 12 Jun 2014 11:03:24 -0700 (PDT)
>
>> From: Varka Bhadram <varkabhadram@gmail.com>
>> Date: Thu, 12 Jun 2014 14:40:48 +0530
>>
>>> separate the mrf24j40 hardware initialisation from probe()
>>> and adds the sanity checkings.
>>>
>>> These checkings are required if somebody hasn't a right spi configuration
>>> the probe function should fail. So we have to return from there.
>>>
>>> Signed-off-by: Varka Bhadram <varkab@cdac.in>
>>
>> Applied, thanks.
>
> Reverted, did you even compile test this change?
>
> drivers/net/ieee802154/mrf24j40.c: In function ‘mrf24j40_probe’:
> drivers/net/ieee802154/mrf24j40.c:741:10: error: ‘err_hw_init’ undeclared (first use in this function)
> drivers/net/ieee802154/mrf24j40.c:741:10: note: each undeclared identifier is reported only once for each function it appears in
> drivers/net/ieee802154/mrf24j40.c:759:1: warning: label ‘err_hw_init’ defined but not used [-Wunused-label]
> drivers/net/ieee802154/mrf24j40.c:702:5: warning: unused variable ‘val’ [-Wunused-variable]
> make[1]: *** [drivers/net/ieee802154/mrf24j40.o] Error 1
> make: *** [drivers/net/ieee802154/mrf24j40.o] Error 2