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Wed, 17 Sep 2025 01:05:40 -0700 (PDT) Received: from localhost.localdomain ([2001:b07:6474:ebbf:1215:4a13:8ee5:da2a]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b07e1aed5ffsm924936766b.81.2025.09.17.01.05.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Sep 2025 01:05:40 -0700 (PDT) From: Dario Binacchi To: linux-kernel@vger.kernel.org Cc: linux-amarula@amarulasolutions.com, Frank Li , Dario Binacchi , Dmitry Torokhov , Fabio Estevam , Michael Trimarchi , Pengutronix Kernel Team , Sascha Hauer , Shawn Guo , imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-input@vger.kernel.org Subject: [PATCH v4 2/6] Input: imx6ul_tsc - use BIT, FIELD_{GET,PREP} and GENMASK macros Date: Wed, 17 Sep 2025 10:05:07 +0200 Message-ID: <20250917080534.1772202-3-dario.binacchi@amarulasolutions.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250917080534.1772202-1-dario.binacchi@amarulasolutions.com> References: <20250917080534.1772202-1-dario.binacchi@amarulasolutions.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Replace opencoded masking and shifting, with BIT(), GENMASK(), FIELD_GET() and FIELD_PREP() macros. Signed-off-by: Dario Binacchi Reviewed-by: Frank Li --- (no changes since v2) Changes in v2: - Add Reviewed-by tag of Frank Li. - Move the patch right after the one fixing the typo according to Frank Li's suggestions. drivers/input/touchscreen/imx6ul_tsc.c | 96 +++++++++++++++----------- 1 file changed, 54 insertions(+), 42 deletions(-) diff --git a/drivers/input/touchscreen/imx6ul_tsc.c b/drivers/input/touchsc= reen/imx6ul_tsc.c index c2c6e50efc54..e2c59cc7c82c 100644 --- a/drivers/input/touchscreen/imx6ul_tsc.c +++ b/drivers/input/touchscreen/imx6ul_tsc.c @@ -7,6 +7,7 @@ #include #include #include +#include #include #include #include @@ -20,25 +21,23 @@ #include =20 /* ADC configuration registers field define */ -#define ADC_AIEN (0x1 << 7) +#define ADC_AIEN BIT(7) +#define ADC_ADCH_MASK GENMASK(4, 0) #define ADC_CONV_DISABLE 0x1F -#define ADC_AVGE (0x1 << 5) -#define ADC_CAL (0x1 << 7) -#define ADC_CALF 0x2 -#define ADC_12BIT_MODE (0x2 << 2) -#define ADC_CONV_MODE_MASK (0x3 << 2) +#define ADC_AVGE BIT(5) +#define ADC_CAL BIT(7) +#define ADC_CALF BIT(1) +#define ADC_CONV_MODE_MASK GENMASK(3, 2) +#define ADC_12BIT_MODE 0x2 #define ADC_IPG_CLK 0x00 -#define ADC_INPUT_CLK_MASK 0x3 -#define ADC_CLK_DIV_8 (0x03 << 5) -#define ADC_CLK_DIV_MASK (0x3 << 5) -#define ADC_SHORT_SAMPLE_MODE (0x0 << 4) -#define ADC_SAMPLE_MODE_MASK (0x1 << 4) -#define ADC_HARDWARE_TRIGGER (0x1 << 13) -#define ADC_AVGS_SHIFT 14 -#define ADC_AVGS_MASK (0x3 << 14) +#define ADC_INPUT_CLK_MASK GENMASK(1, 0) +#define ADC_CLK_DIV_8 0x03 +#define ADC_CLK_DIV_MASK GENMASK(6, 5) +#define ADC_SAMPLE_MODE BIT(4) +#define ADC_HARDWARE_TRIGGER BIT(13) +#define ADC_AVGS_MASK GENMASK(15, 14) #define SELECT_CHANNEL_4 0x04 #define SELECT_CHANNEL_1 0x01 -#define DISABLE_CONVERSION_INT (0x0 << 7) =20 /* ADC registers */ #define REG_ADC_HC0 0x00 @@ -65,19 +64,26 @@ #define REG_TSC_DEBUG_MODE 0x70 #define REG_TSC_DEBUG_MODE2 0x80 =20 +/* TSC_MEASURE_VALUE register field define */ +#define X_VALUE_MASK GENMASK(27, 16) +#define Y_VALUE_MASK GENMASK(11, 0) + /* TSC configuration registers field define */ -#define DETECT_4_WIRE_MODE (0x0 << 4) -#define AUTO_MEASURE 0x1 -#define MEASURE_SIGNAL 0x1 -#define DETECT_SIGNAL (0x1 << 4) -#define VALID_SIGNAL (0x1 << 8) -#define MEASURE_INT_EN 0x1 -#define MEASURE_SIG_EN 0x1 -#define VALID_SIG_EN (0x1 << 8) -#define DE_GLITCH_2 (0x2 << 29) -#define START_SENSE (0x1 << 12) -#define TSC_DISABLE (0x1 << 16) +#define MEASURE_DELAY_TIME_MASK GENMASK(31, 8) +#define DETECT_5_WIRE_MODE BIT(4) +#define AUTO_MEASURE BIT(0) +#define MEASURE_SIGNAL BIT(0) +#define DETECT_SIGNAL BIT(4) +#define VALID_SIGNAL BIT(8) +#define MEASURE_INT_EN BIT(0) +#define MEASURE_SIG_EN BIT(0) +#define VALID_SIG_EN BIT(8) +#define DE_GLITCH_MASK GENMASK(30, 29) +#define DE_GLITCH_2 0x02 +#define START_SENSE BIT(12) +#define TSC_DISABLE BIT(16) #define DETECT_MODE 0x2 +#define STATE_MACHINE_MASK GENMASK(22, 20) =20 struct imx6ul_tsc { struct device *dev; @@ -112,19 +118,20 @@ static int imx6ul_adc_init(struct imx6ul_tsc *tsc) =20 adc_cfg =3D readl(tsc->adc_regs + REG_ADC_CFG); adc_cfg &=3D ~(ADC_CONV_MODE_MASK | ADC_INPUT_CLK_MASK); - adc_cfg |=3D ADC_12BIT_MODE | ADC_IPG_CLK; - adc_cfg &=3D ~(ADC_CLK_DIV_MASK | ADC_SAMPLE_MODE_MASK); - adc_cfg |=3D ADC_CLK_DIV_8 | ADC_SHORT_SAMPLE_MODE; + adc_cfg |=3D FIELD_PREP(ADC_CONV_MODE_MASK, ADC_12BIT_MODE) | + FIELD_PREP(ADC_INPUT_CLK_MASK, ADC_IPG_CLK); + adc_cfg &=3D ~(ADC_CLK_DIV_MASK | ADC_SAMPLE_MODE); + adc_cfg |=3D FIELD_PREP(ADC_CLK_DIV_MASK, ADC_CLK_DIV_8); if (tsc->average_enable) { adc_cfg &=3D ~ADC_AVGS_MASK; - adc_cfg |=3D (tsc->average_select) << ADC_AVGS_SHIFT; + adc_cfg |=3D FIELD_PREP(ADC_AVGS_MASK, tsc->average_select); } adc_cfg &=3D ~ADC_HARDWARE_TRIGGER; writel(adc_cfg, tsc->adc_regs + REG_ADC_CFG); =20 /* enable calibration interrupt */ adc_hc |=3D ADC_AIEN; - adc_hc |=3D ADC_CONV_DISABLE; + adc_hc |=3D FIELD_PREP(ADC_ADCH_MASK, ADC_CONV_DISABLE); writel(adc_hc, tsc->adc_regs + REG_ADC_HC0); =20 /* start ADC calibration */ @@ -164,19 +171,21 @@ static void imx6ul_tsc_channel_config(struct imx6ul_t= sc *tsc) { u32 adc_hc0, adc_hc1, adc_hc2, adc_hc3, adc_hc4; =20 - adc_hc0 =3D DISABLE_CONVERSION_INT; + adc_hc0 =3D FIELD_PREP(ADC_AIEN, 0); writel(adc_hc0, tsc->adc_regs + REG_ADC_HC0); =20 - adc_hc1 =3D DISABLE_CONVERSION_INT | SELECT_CHANNEL_4; + adc_hc1 =3D FIELD_PREP(ADC_AIEN, 0) | + FIELD_PREP(ADC_ADCH_MASK, SELECT_CHANNEL_4); writel(adc_hc1, tsc->adc_regs + REG_ADC_HC1); =20 - adc_hc2 =3D DISABLE_CONVERSION_INT; + adc_hc2 =3D FIELD_PREP(ADC_AIEN, 0); writel(adc_hc2, tsc->adc_regs + REG_ADC_HC2); =20 - adc_hc3 =3D DISABLE_CONVERSION_INT | SELECT_CHANNEL_1; + adc_hc3 =3D FIELD_PREP(ADC_AIEN, 0) | + FIELD_PREP(ADC_ADCH_MASK, SELECT_CHANNEL_1); writel(adc_hc3, tsc->adc_regs + REG_ADC_HC3); =20 - adc_hc4 =3D DISABLE_CONVERSION_INT; + adc_hc4 =3D FIELD_PREP(ADC_AIEN, 0); writel(adc_hc4, tsc->adc_regs + REG_ADC_HC4); } =20 @@ -188,13 +197,16 @@ static void imx6ul_tsc_channel_config(struct imx6ul_t= sc *tsc) static void imx6ul_tsc_set(struct imx6ul_tsc *tsc) { u32 basic_setting =3D 0; + u32 debug_mode2; u32 start; =20 - basic_setting |=3D tsc->measure_delay_time << 8; - basic_setting |=3D DETECT_4_WIRE_MODE | AUTO_MEASURE; + basic_setting |=3D FIELD_PREP(MEASURE_DELAY_TIME_MASK, + tsc->measure_delay_time); + basic_setting |=3D AUTO_MEASURE; writel(basic_setting, tsc->tsc_regs + REG_TSC_BASIC_SETTING); =20 - writel(DE_GLITCH_2, tsc->tsc_regs + REG_TSC_DEBUG_MODE2); + debug_mode2 =3D FIELD_PREP(DE_GLITCH_MASK, DE_GLITCH_2); + writel(debug_mode2, tsc->tsc_regs + REG_TSC_DEBUG_MODE2); =20 writel(tsc->pre_charge_time, tsc->tsc_regs + REG_TSC_PRE_CHARGE_TIME); writel(MEASURE_INT_EN, tsc->tsc_regs + REG_TSC_INT_EN); @@ -250,7 +262,7 @@ static bool tsc_wait_detect_mode(struct imx6ul_tsc *tsc) =20 usleep_range(200, 400); debug_mode2 =3D readl(tsc->tsc_regs + REG_TSC_DEBUG_MODE2); - state_machine =3D (debug_mode2 >> 20) & 0x7; + state_machine =3D FIELD_GET(STATE_MACHINE_MASK, debug_mode2); } while (state_machine !=3D DETECT_MODE); =20 usleep_range(200, 400); @@ -278,8 +290,8 @@ static irqreturn_t tsc_irq_fn(int irq, void *dev_id) =20 if (status & MEASURE_SIGNAL) { value =3D readl(tsc->tsc_regs + REG_TSC_MEASURE_VALUE); - x =3D (value >> 16) & 0x0fff; - y =3D value & 0x0fff; + x =3D FIELD_GET(X_VALUE_MASK, value); + y =3D FIELD_GET(Y_VALUE_MASK, value); =20 /* * In detect mode, we can get the xnur gpio value, --=20 2.43.0