linux-kernel - Re: [PATCH v3 09/10] counter: stm32-timer-cnt: add support for overflow events

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Date: Mon, 8 Jan 2024 21:06:52 +0000
From: William Breathitt Gray <william.gray@...aro.org>
To: Fabrice Gasnier <fabrice.gasnier@...s.st.com>
Cc: lee@...nel.org, alexandre.torgue@...s.st.com, linux-iio@...r.kernel.org,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 09/10] counter: stm32-timer-cnt: add support for
 overflow events

On Wed, Dec 20, 2023 at 03:57:25PM +0100, Fabrice Gasnier wrote:
> diff --git a/include/linux/mfd/stm32-timers.h b/include/linux/mfd/stm32-timers.h
> index ca35af30745f..9eb17481b07f 100644
> --- a/include/linux/mfd/stm32-timers.h
> +++ b/include/linux/mfd/stm32-timers.h
> @@ -41,6 +41,11 @@
>  #define TIM_SMCR_SMS	(BIT(0) | BIT(1) | BIT(2)) /* Slave mode selection */
>  #define TIM_SMCR_TS	(BIT(4) | BIT(5) | BIT(6)) /* Trigger selection */
>  #define TIM_DIER_UIE	BIT(0)	/* Update interrupt	   */
> +#define TIM_DIER_CC1IE	BIT(1)  /* CC1 Interrupt Enable    */
> +#define TIM_DIER_CC2IE	BIT(2)  /* CC2 Interrupt Enable    */
> +#define TIM_DIER_CC3IE	BIT(3)  /* CC3 Interrupt Enable    */
> +#define TIM_DIER_CC4IE	BIT(4)  /* CC4 Interrupt Enable    */
> +#define TIM_DIER_CC_IE(x)	BIT((x) + 1) /* CC1, CC2, CC3, CC4 interrupt enable */
>  #define TIM_DIER_UDE	BIT(8)  /* Update DMA request Enable */
>  #define TIM_DIER_CC1DE	BIT(9)  /* CC1 DMA request Enable  */
>  #define TIM_DIER_CC2DE	BIT(10) /* CC2 DMA request Enable  */
> @@ -49,6 +54,7 @@
>  #define TIM_DIER_COMDE	BIT(13) /* COM DMA request Enable  */
>  #define TIM_DIER_TDE	BIT(14) /* Trigger DMA request Enable */
>  #define TIM_SR_UIF	BIT(0)	/* Update interrupt flag   */
> +#define TIM_SR_CC_IF(x)	BIT((x) + 1) /* CC1, CC2, CC3, CC4 interrupt flag */
>  #define TIM_EGR_UG	BIT(0)	/* Update Generation       */
>  #define TIM_CCMR_PE	BIT(3)	/* Channel Preload Enable  */
>  #define TIM_CCMR_M1	(BIT(6) | BIT(5))  /* Channel PWM Mode 1 */
> @@ -60,16 +66,23 @@
>  #define TIM_CCMR_CC1S_TI2	BIT(1)	/* IC1/IC3 selects TI2/TI4 */
>  #define TIM_CCMR_CC2S_TI2	BIT(8)	/* IC2/IC4 selects TI2/TI4 */
>  #define TIM_CCMR_CC2S_TI1	BIT(9)	/* IC2/IC4 selects TI1/TI3 */
> +#define TIM_CCMR_CC3S		(BIT(0) | BIT(1)) /* Capture/compare 3 sel */
> +#define TIM_CCMR_CC4S		(BIT(8) | BIT(9)) /* Capture/compare 4 sel */
> +#define TIM_CCMR_CC3S_TI3	BIT(0)	/* IC3 selects TI3 */
> +#define TIM_CCMR_CC4S_TI4	BIT(8)	/* IC4 selects TI4 */
>  #define TIM_CCER_CC1E	BIT(0)	/* Capt/Comp 1  out Ena    */
>  #define TIM_CCER_CC1P	BIT(1)	/* Capt/Comp 1  Polarity   */
>  #define TIM_CCER_CC1NE	BIT(2)	/* Capt/Comp 1N out Ena    */
>  #define TIM_CCER_CC1NP	BIT(3)	/* Capt/Comp 1N Polarity   */
>  #define TIM_CCER_CC2E	BIT(4)	/* Capt/Comp 2  out Ena    */
>  #define TIM_CCER_CC2P	BIT(5)	/* Capt/Comp 2  Polarity   */
> +#define TIM_CCER_CC2NP	BIT(7)	/* Capt/Comp 2N Polarity   */
>  #define TIM_CCER_CC3E	BIT(8)	/* Capt/Comp 3  out Ena    */
>  #define TIM_CCER_CC3P	BIT(9)	/* Capt/Comp 3  Polarity   */
> +#define TIM_CCER_CC3NP	BIT(11)	/* Capt/Comp 3N Polarity   */
>  #define TIM_CCER_CC4E	BIT(12)	/* Capt/Comp 4  out Ena    */
>  #define TIM_CCER_CC4P	BIT(13)	/* Capt/Comp 4  Polarity   */
> +#define TIM_CCER_CC4NP	BIT(15)	/* Capt/Comp 4N Polarity   */

I forgot to mention that you should move the introduction of these
defines to the subsequent patch adding support for capture events
because that's where the defines are actually used.

William Breathitt Gray

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