[PATCH 1/3] dt-bindings: i2c: at91: cosmetic formatting of compatible list

[PATCH 1/3] dt-bindings: i2c: at91: cosmetic formatting of compatible list

[Eugen.Hristev]

From: Eugen Hristev <eugen.hristev@microchip.com>

Format the list of compatibles with one compatible per line.

Suggested-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
---
 Documentation/devicetree/bindings/i2c/i2c-at91.txt | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/i2c/i2c-at91.txt b/Documentation/devicetree/bindings/i2c/i2c-at91.txt
index 2210f43..d35cd63 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-at91.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-at91.txt
@@ -1,10 +1,16 @@
 I2C for Atmel platforms
 
 Required properties :
-- compatible : Must be "atmel,at91rm9200-i2c", "atmel,at91sam9261-i2c",
-     "atmel,at91sam9260-i2c", "atmel,at91sam9g20-i2c", "atmel,at91sam9g10-i2c",
-     "atmel,at91sam9x5-i2c", "atmel,sama5d4-i2c", "atmel,sama5d2-i2c" or
-     "microchip,sam9x60-i2c"
+- compatible : Must be one of:
+	"atmel,at91rm9200-i2c",
+	"atmel,at91sam9261-i2c",
+	"atmel,at91sam9260-i2c",
+	"atmel,at91sam9g20-i2c",
+	"atmel,at91sam9g10-i2c",
+	"atmel,at91sam9x5-i2c",
+	"atmel,sama5d4-i2c",
+	"atmel,sama5d2-i2c",
+	"microchip,sam9x60-i2c".
 - reg: physical base address of the controller and length of memory mapped
      region.
 - interrupts: interrupt number to the cpu.
-- 
2.7.4


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[PATCH 2/3] i2c: at91: fix clk_offset for sama5d2

[Eugen.Hristev]

From: Eugen Hristev <eugen.hristev@microchip.com>

In SAM9X60 datasheet, FLEX_TWI_CWGR register rescription mentions clock
offset of 3 cycles (compared to 4 in eg. SAMA5D3).
This is the same offset as in SAMA5D2.

Fixes: b00277923743 ("i2c: at91: add new platform support for sam9x60")
Suggested-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
---
 drivers/i2c/busses/i2c-at91-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-at91-core.c b/drivers/i2c/busses/i2c-at91-core.c
index e13af48..5137e62 100644
--- a/drivers/i2c/busses/i2c-at91-core.c
+++ b/drivers/i2c/busses/i2c-at91-core.c
@@ -174,7 +174,7 @@ static struct at91_twi_pdata sama5d2_config = {
 
 static struct at91_twi_pdata sam9x60_config = {
 	.clk_max_div = 7,
-	.clk_offset = 4,
+	.clk_offset = 3,
 	.has_unre_flag = true,
 	.has_alt_cmd = true,
 	.has_hold_field = true,
-- 
2.7.4


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[PATCH v2 2/3] i2c: at91: fix clk_offset for sam9x60

[Eugen.Hristev]

From: Eugen Hristev <eugen.hristev@microchip.com>

In SAM9X60 datasheet, FLEX_TWI_CWGR register rescription mentions clock
offset of 3 cycles (compared to 4 in eg. SAMA5D3).
This is the same offset as in SAMA5D2.

Fixes: b00277923743 ("i2c: at91: add new platform support for sam9x60")
Suggested-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
---

Sorry, wrong subject line. Modified to SAM9X60 .


 drivers/i2c/busses/i2c-at91-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-at91-core.c b/drivers/i2c/busses/i2c-at91-core.c
index e13af48..5137e62 100644
--- a/drivers/i2c/busses/i2c-at91-core.c
+++ b/drivers/i2c/busses/i2c-at91-core.c
@@ -174,7 +174,7 @@ static struct at91_twi_pdata sama5d2_config = {
 
 static struct at91_twi_pdata sam9x60_config = {
 	.clk_max_div = 7,
-	.clk_offset = 4,
+	.clk_offset = 3,
 	.has_unre_flag = true,
 	.has_alt_cmd = true,
 	.has_hold_field = true,
-- 
2.7.4


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Re: [PATCH v2 2/3] i2c: at91: fix clk_offset for sam9x60

[Ludovic Desroches]

On Mon, Dec 02, 2019 at 10:01:17AM +0100, Eugen Hristev - M18282 wrote:
> From: Eugen Hristev <eugen.hristev@microchip.com>
> 
> In SAM9X60 datasheet, FLEX_TWI_CWGR register rescription mentions clock

typo here: description

> offset of 3 cycles (compared to 4 in eg. SAMA5D3).
> This is the same offset as in SAMA5D2.
> 
> Fixes: b00277923743 ("i2c: at91: add new platform support for sam9x60")
> Suggested-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
> Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>

Thanks

> ---
> 
> Sorry, wrong subject line. Modified to SAM9X60 .
> 
> 
>  drivers/i2c/busses/i2c-at91-core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/i2c/busses/i2c-at91-core.c b/drivers/i2c/busses/i2c-at91-core.c
> index e13af48..5137e62 100644
> --- a/drivers/i2c/busses/i2c-at91-core.c
> +++ b/drivers/i2c/busses/i2c-at91-core.c
> @@ -174,7 +174,7 @@ static struct at91_twi_pdata sama5d2_config = {
>  
>  static struct at91_twi_pdata sam9x60_config = {
>  	.clk_max_div = 7,
> -	.clk_offset = 4,
> +	.clk_offset = 3,
>  	.has_unre_flag = true,
>  	.has_alt_cmd = true,
>  	.has_hold_field = true,
> -- 
> 2.7.4
> 

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Re: [PATCH 2/3] i2c: at91: fix clk_offset for sama5d2

[Codrin.Ciubotariu]

On 02.12.2019 10:56, Eugen Hristev - M18282 wrote:
> From: Eugen Hristev <eugen.hristev@microchip.com>
> 
> In SAM9X60 datasheet, FLEX_TWI_CWGR register rescription mentions clock
> offset of 3 cycles (compared to 4 in eg. SAMA5D3).
> This is the same offset as in SAMA5D2.
> 
> Fixes: b00277923743 ("i2c: at91: add new platform support for sam9x60")
> Suggested-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
> Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>

Reviewed-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>

Thanks!

Best regards,
Codrin

> ---
>   drivers/i2c/busses/i2c-at91-core.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/i2c/busses/i2c-at91-core.c b/drivers/i2c/busses/i2c-at91-core.c
> index e13af48..5137e62 100644
> --- a/drivers/i2c/busses/i2c-at91-core.c
> +++ b/drivers/i2c/busses/i2c-at91-core.c
> @@ -174,7 +174,7 @@ static struct at91_twi_pdata sama5d2_config = {
>   
>   static struct at91_twi_pdata sam9x60_config = {
>   	.clk_max_div = 7,
> -	.clk_offset = 4,
> +	.clk_offset = 3,
>   	.has_unre_flag = true,
>   	.has_alt_cmd = true,
>   	.has_hold_field = true,
> 

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[PATCH 3/3] i2c: at91: remote default value initialization

[Eugen.Hristev]

From: Eugen Hristev <eugen.hristev@microchip.com>

Platform data structs are initialized by default with zero values.
Thus it becomes redundant to initialize them manually to zero (false).
Remove extra false initialization for field members in structs.

Suggested-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
---
 drivers/i2c/busses/i2c-at91-core.c | 39 --------------------------------------
 1 file changed, 39 deletions(-)

diff --git a/drivers/i2c/busses/i2c-at91-core.c b/drivers/i2c/busses/i2c-at91-core.c
index 5137e62..3da1a8a 100644
--- a/drivers/i2c/busses/i2c-at91-core.c
+++ b/drivers/i2c/busses/i2c-at91-core.c
@@ -66,55 +66,26 @@ static struct at91_twi_pdata at91rm9200_config = {
 	.clk_max_div = 5,
 	.clk_offset = 3,
 	.has_unre_flag = true,
-	.has_alt_cmd = false,
-	.has_hold_field = false,
-	.has_dig_filtr = false,
-	.has_adv_dig_filtr = false,
-	.has_ana_filtr = false,
 };
 
 static struct at91_twi_pdata at91sam9261_config = {
 	.clk_max_div = 5,
 	.clk_offset = 4,
-	.has_unre_flag = false,
-	.has_alt_cmd = false,
-	.has_hold_field = false,
-	.has_dig_filtr = false,
-	.has_adv_dig_filtr = false,
-	.has_ana_filtr = false,
 };
 
 static struct at91_twi_pdata at91sam9260_config = {
 	.clk_max_div = 7,
 	.clk_offset = 4,
-	.has_unre_flag = false,
-	.has_alt_cmd = false,
-	.has_hold_field = false,
-	.has_dig_filtr = false,
-	.has_adv_dig_filtr = false,
-	.has_ana_filtr = false,
 };
 
 static struct at91_twi_pdata at91sam9g20_config = {
 	.clk_max_div = 7,
 	.clk_offset = 4,
-	.has_unre_flag = false,
-	.has_alt_cmd = false,
-	.has_hold_field = false,
-	.has_dig_filtr = false,
-	.has_adv_dig_filtr = false,
-	.has_ana_filtr = false,
 };
 
 static struct at91_twi_pdata at91sam9g10_config = {
 	.clk_max_div = 7,
 	.clk_offset = 4,
-	.has_unre_flag = false,
-	.has_alt_cmd = false,
-	.has_hold_field = false,
-	.has_dig_filtr = false,
-	.has_adv_dig_filtr = false,
-	.has_ana_filtr = false,
 };
 
 static const struct platform_device_id at91_twi_devtypes[] = {
@@ -142,23 +113,13 @@ static const struct platform_device_id at91_twi_devtypes[] = {
 static struct at91_twi_pdata at91sam9x5_config = {
 	.clk_max_div = 7,
 	.clk_offset = 4,
-	.has_unre_flag = false,
-	.has_alt_cmd = false,
-	.has_hold_field = false,
-	.has_dig_filtr = false,
-	.has_adv_dig_filtr = false,
-	.has_ana_filtr = false,
 };
 
 static struct at91_twi_pdata sama5d4_config = {
 	.clk_max_div = 7,
 	.clk_offset = 4,
-	.has_unre_flag = false,
-	.has_alt_cmd = false,
 	.has_hold_field = true,
 	.has_dig_filtr = true,
-	.has_adv_dig_filtr = false,
-	.has_ana_filtr = false,
 };
 
 static struct at91_twi_pdata sama5d2_config = {
-- 
2.7.4


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Re: [PATCH 3/3] i2c: at91: remote default value initialization

[Ludovic Desroches]

On Mon, Dec 02, 2019 at 09:56:41AM +0100, Eugen Hristev - M18282 wrote:
> From: Eugen Hristev <eugen.hristev@microchip.com>
> 
> Platform data structs are initialized by default with zero values.
> Thus it becomes redundant to initialize them manually to zero (false).
> Remove extra false initialization for field members in structs.
> 
> Suggested-by: Wolfram Sang <wsa@the-dreams.de>
> Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>

Honestly, I prefer an explicit description than saving lines of code, in
a glance you have all the details, don't need to go back to the
structure definition.

As it's a personal belief, I won't argue about it.
Reviewed-by: Ludovic Desroches <ludovic.desroches@microchip.com>

> ---
>  drivers/i2c/busses/i2c-at91-core.c | 39 --------------------------------------
>  1 file changed, 39 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-at91-core.c b/drivers/i2c/busses/i2c-at91-core.c
> index 5137e62..3da1a8a 100644
> --- a/drivers/i2c/busses/i2c-at91-core.c
> +++ b/drivers/i2c/busses/i2c-at91-core.c
> @@ -66,55 +66,26 @@ static struct at91_twi_pdata at91rm9200_config = {
>  	.clk_max_div = 5,
>  	.clk_offset = 3,
>  	.has_unre_flag = true,
> -	.has_alt_cmd = false,
> -	.has_hold_field = false,
> -	.has_dig_filtr = false,
> -	.has_adv_dig_filtr = false,
> -	.has_ana_filtr = false,
>  };
>  
>  static struct at91_twi_pdata at91sam9261_config = {
>  	.clk_max_div = 5,
>  	.clk_offset = 4,
> -	.has_unre_flag = false,
> -	.has_alt_cmd = false,
> -	.has_hold_field = false,
> -	.has_dig_filtr = false,
> -	.has_adv_dig_filtr = false,
> -	.has_ana_filtr = false,
>  };
>  
>  static struct at91_twi_pdata at91sam9260_config = {
>  	.clk_max_div = 7,
>  	.clk_offset = 4,
> -	.has_unre_flag = false,
> -	.has_alt_cmd = false,
> -	.has_hold_field = false,
> -	.has_dig_filtr = false,
> -	.has_adv_dig_filtr = false,
> -	.has_ana_filtr = false,
>  };
>  
>  static struct at91_twi_pdata at91sam9g20_config = {
>  	.clk_max_div = 7,
>  	.clk_offset = 4,
> -	.has_unre_flag = false,
> -	.has_alt_cmd = false,
> -	.has_hold_field = false,
> -	.has_dig_filtr = false,
> -	.has_adv_dig_filtr = false,
> -	.has_ana_filtr = false,
>  };
>  
>  static struct at91_twi_pdata at91sam9g10_config = {
>  	.clk_max_div = 7,
>  	.clk_offset = 4,
> -	.has_unre_flag = false,
> -	.has_alt_cmd = false,
> -	.has_hold_field = false,
> -	.has_dig_filtr = false,
> -	.has_adv_dig_filtr = false,
> -	.has_ana_filtr = false,
>  };
>  
>  static const struct platform_device_id at91_twi_devtypes[] = {
> @@ -142,23 +113,13 @@ static const struct platform_device_id at91_twi_devtypes[] = {
>  static struct at91_twi_pdata at91sam9x5_config = {
>  	.clk_max_div = 7,
>  	.clk_offset = 4,
> -	.has_unre_flag = false,
> -	.has_alt_cmd = false,
> -	.has_hold_field = false,
> -	.has_dig_filtr = false,
> -	.has_adv_dig_filtr = false,
> -	.has_ana_filtr = false,
>  };
>  
>  static struct at91_twi_pdata sama5d4_config = {
>  	.clk_max_div = 7,
>  	.clk_offset = 4,
> -	.has_unre_flag = false,
> -	.has_alt_cmd = false,
>  	.has_hold_field = true,
>  	.has_dig_filtr = true,
> -	.has_adv_dig_filtr = false,
> -	.has_ana_filtr = false,
>  };
>  
>  static struct at91_twi_pdata sama5d2_config = {
> -- 
> 2.7.4
> 

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Re: [PATCH 1/3] dt-bindings: i2c: at91: cosmetic formatting of compatible list

[Ludovic Desroches]

On Mon, Dec 02, 2019 at 09:56:35AM +0100, Eugen Hristev - M18282 wrote:
> From: Eugen Hristev <eugen.hristev@microchip.com>
> 
> Format the list of compatibles with one compatible per line.
> 
> Suggested-by: Peter Rosin <peda@axentia.se>
> Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com> 

Thanks

> ---
>  Documentation/devicetree/bindings/i2c/i2c-at91.txt | 14 ++++++++++----
>  1 file changed, 10 insertions(+), 4 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/i2c/i2c-at91.txt b/Documentation/devicetree/bindings/i2c/i2c-at91.txt
> index 2210f43..d35cd63 100644
> --- a/Documentation/devicetree/bindings/i2c/i2c-at91.txt
> +++ b/Documentation/devicetree/bindings/i2c/i2c-at91.txt
> @@ -1,10 +1,16 @@
>  I2C for Atmel platforms
>  
>  Required properties :
> -- compatible : Must be "atmel,at91rm9200-i2c", "atmel,at91sam9261-i2c",
> -     "atmel,at91sam9260-i2c", "atmel,at91sam9g20-i2c", "atmel,at91sam9g10-i2c",
> -     "atmel,at91sam9x5-i2c", "atmel,sama5d4-i2c", "atmel,sama5d2-i2c" or
> -     "microchip,sam9x60-i2c"
> +- compatible : Must be one of:
> +	"atmel,at91rm9200-i2c",
> +	"atmel,at91sam9261-i2c",
> +	"atmel,at91sam9260-i2c",
> +	"atmel,at91sam9g20-i2c",
> +	"atmel,at91sam9g10-i2c",
> +	"atmel,at91sam9x5-i2c",
> +	"atmel,sama5d4-i2c",
> +	"atmel,sama5d2-i2c",
> +	"microchip,sam9x60-i2c".
>  - reg: physical base address of the controller and length of memory mapped
>       region.
>  - interrupts: interrupt number to the cpu.
> -- 
> 2.7.4
> 

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