From: Lukasz Majewski <l.majewski@majess.pl>
To: Thierry Reding <thierry.reding@gmail.com>,
Stefan Agner <stefan@agner.ch>,
Sascha Hauer <s.hauer@pengutronix.de>,
Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: linux-pwm@vger.kernel.org, linux-kernel@vger.kernel.org,
"Fabio Estevam" <fabio.estevam@nxp.com>,
"Fabio Estevam" <festevam@gmail.com>,
"Lothar Wassmann" <LW@karo-electronics.de>,
"Bhuvanchandra DV" <bhuvanchandra.dv@toradex.com>,
kernel@pengutronix.de, "Lukasz Majewski" <l.majewski@majess.pl>,
"Lothar Waßmann" <LW@karo-electronics.de>
Subject: [PATCH v3 11/11] pwm: imx: Add polarity inversion support to i.MX's PWMv2
Date: Tue, 1 Nov 2016 08:10:30 +0100 [thread overview]
Message-ID: <1477984230-18071-12-git-send-email-l.majewski@majess.pl> (raw)
In-Reply-To: <1477984230-18071-1-git-send-email-l.majewski@majess.pl>
With this patch the polarity settings for i.MX's PWMv2 is now supported
on top of atomic PWM setting
Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Lukasz Majewski <l.majewski@majess.pl>
---
Changes for v3:
- None
Changes for v2:
- New patch
---
drivers/pwm/pwm-imx.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
index b636526..03b01a4 100644
--- a/drivers/pwm/pwm-imx.c
+++ b/drivers/pwm/pwm-imx.c
@@ -38,6 +38,7 @@
#define MX3_PWMCR_DOZEEN (1 << 24)
#define MX3_PWMCR_WAITEN (1 << 23)
#define MX3_PWMCR_DBGEN (1 << 22)
+#define MX3_PWMCR_POUTC (1 << 18)
#define MX3_PWMCR_CLKSRC_IPG_HIGH (2 << 16)
#define MX3_PWMCR_CLKSRC_IPG (1 << 16)
#define MX3_PWMCR_SWR (1 << 3)
@@ -215,6 +216,9 @@ static int imx_pwm_apply_v2(struct pwm_chip *chip, struct pwm_device *pwm,
if (state->enabled)
cr |= MX3_PWMCR_EN;
+ if (state->polarity == PWM_POLARITY_INVERSED)
+ cr |= MX3_PWMCR_POUTC;
+
writel(cr, imx->mmio_base + MX3_PWMCR);
/* Disable the clock if the PWM is being disabled. */
@@ -237,6 +241,7 @@ static struct pwm_ops imx_pwm_ops_v2 = {
};
struct imx_pwm_data {
+ bool polarity_supported;
struct pwm_ops *pwm_ops;
};
@@ -245,6 +250,7 @@ static struct imx_pwm_data imx_pwm_data_v1 = {
};
static struct imx_pwm_data imx_pwm_data_v2 = {
+ .polarity_supported = true,
.pwm_ops = &imx_pwm_ops_v2,
};
@@ -285,6 +291,11 @@ static int imx_pwm_probe(struct platform_device *pdev)
imx->chip.base = -1;
imx->chip.npwm = 1;
imx->chip.can_sleep = true;
+ if (data->polarity_supported) {
+ dev_dbg(&pdev->dev, "PWM supports output inversion\n");
+ imx->chip.of_xlate = of_pwm_xlate_with_flags;
+ imx->chip.of_pwm_n_cells = 3;
+ }
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
imx->mmio_base = devm_ioremap_resource(&pdev->dev, r);
--
2.1.4
next prev parent reply other threads:[~2016-11-01 7:22 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-01 7:10 [PATCH v3 00/11] pwm: imx: Provide atomic operation for IMX PWM driver Lukasz Majewski
2016-11-01 7:10 ` [PATCH v3 01/11] pwm: print error messages with pr_err() instead of pr_debug() Lukasz Majewski
2016-11-01 7:10 ` [PATCH v3 02/11] pwm: imx: remove ipg clock Lukasz Majewski
2016-11-01 9:26 ` Philipp Zabel
2016-11-22 21:04 ` Stefan Agner
2016-11-23 8:43 ` Boris Brezillon
2016-11-28 6:02 ` Lukasz Majewski
2016-11-01 7:10 ` [PATCH v3 03/11] pwm: imx: Add separate set of pwm ops for PWMv1 and PWMv2 Lukasz Majewski
2016-11-01 7:10 ` [PATCH v3 04/11] pwm: imx: Rewrite imx_pwm_*_v1 code to facilitate switch to atomic pwm operation Lukasz Majewski
2016-11-22 21:31 ` Stefan Agner
2016-11-01 7:10 ` [PATCH v3 05/11] pwm: imx: Move PWMv2 software reset code to a separate function Lukasz Majewski
2016-11-22 21:56 ` Stefan Agner
2016-11-01 7:10 ` [PATCH v3 06/11] pwm: imx: Move PWMv2 wait for fifo slot " Lukasz Majewski
2016-11-22 21:56 ` Stefan Agner
2016-11-01 7:10 ` [PATCH v3 07/11] pwm: imx: Provide atomic PWM support for i.MX PWMv2 Lukasz Majewski
2016-11-22 21:55 ` Stefan Agner
2016-11-23 8:38 ` Boris Brezillon
2016-11-23 19:30 ` Stefan Agner
2016-11-28 5:50 ` Lukasz Majewski
2016-11-28 8:15 ` Boris Brezillon
2016-11-28 20:48 ` Lukasz Majewski
2016-11-29 8:24 ` Boris Brezillon
2016-11-01 7:10 ` [PATCH v3 08/11] pwm: imx: Remove redundant i.MX PWMv2 code Lukasz Majewski
2016-11-01 7:10 ` [PATCH v3 09/11] pwm: core: make the PWM_POLARITY flag in DTB optional Lukasz Majewski
2016-11-01 7:10 ` [PATCH v3 10/11] pwm: imx: doc: Update imx-pwm.txt documentation entry Lukasz Majewski
2016-11-01 7:10 ` Lukasz Majewski [this message]
2016-11-22 22:08 ` [PATCH v3 11/11] pwm: imx: Add polarity inversion support to i.MX's PWMv2 Stefan Agner
2016-11-08 22:24 ` [PATCH v3 00/11] pwm: imx: Provide atomic operation for IMX PWM driver Lukasz Majewski
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