From: Claudiu Beznea <claudiu.beznea@microchip.com>
To: <boris.brezillon@bootlin.com>, <airlied@linux.ie>,
<nicolas.ferre@microchip.com>, <alexandre.belloni@bootlin.com>,
<lee.jones@linaro.org>, <sam@ravnborg.org>
Cc: <peda@axentia.se>, <dri-devel@lists.freedesktop.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>,
Claudiu Beznea <claudiu.beznea@microchip.com>
Subject: [PATCH v3 4/6] mfd: atmel-hlcdc: return in case of error
Date: Wed, 18 Dec 2019 14:28:27 +0200 [thread overview]
Message-ID: <1576672109-22707-5-git-send-email-claudiu.beznea@microchip.com> (raw)
In-Reply-To: <1576672109-22707-1-git-send-email-claudiu.beznea@microchip.com>
For HLCDC timing engine configurations bit ATMEL_HLCDC_SIP of
ATMEL_HLCDC_SR needs to be polled before applying new config. In case of
timeout there is no indicator about this, so, return in case of timeout
and also print a message about this.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
---
drivers/mfd/atmel-hlcdc.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff --git a/drivers/mfd/atmel-hlcdc.c b/drivers/mfd/atmel-hlcdc.c
index 92bfcaa62ace..a1e46c87b956 100644
--- a/drivers/mfd/atmel-hlcdc.c
+++ b/drivers/mfd/atmel-hlcdc.c
@@ -40,10 +40,17 @@ static int regmap_atmel_hlcdc_reg_write(void *context, unsigned int reg,
if (reg <= ATMEL_HLCDC_DIS) {
u32 status;
-
- readl_poll_timeout_atomic(hregmap->regs + ATMEL_HLCDC_SR,
- status, !(status & ATMEL_HLCDC_SIP),
- 1, 100);
+ int ret;
+
+ ret = readl_poll_timeout_atomic(hregmap->regs + ATMEL_HLCDC_SR,
+ status,
+ !(status & ATMEL_HLCDC_SIP),
+ 1, 100);
+ if (ret) {
+ dev_err(hregmap->dev,
+ "Timeout! Clock domain synchronization is in progress!\n");
+ return ret;
+ }
}
writel(val, hregmap->regs + reg);
--
2.7.4
next prev parent reply other threads:[~2019-12-18 12:28 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-18 12:28 [PATCH v3 0/6] fixes for atmel-hlcdc Claudiu Beznea
2019-12-18 12:28 ` [PATCH v3 1/6] drm: atmel-hlcdc: use double rate for pixel clock only if supported Claudiu Beznea
2019-12-18 12:28 ` [PATCH v3 2/6] drm: atmel-hlcdc: enable clock before configuring timing engine Claudiu Beznea
2019-12-18 12:28 ` [PATCH v3 3/6] mfd: atmel-hlcdc: add struct device member to struct atmel_hlcdc_regmap Claudiu Beznea
2019-12-18 12:28 ` Claudiu Beznea [this message]
2020-01-07 10:18 ` [PATCH v3 4/6] mfd: atmel-hlcdc: return in case of error Lee Jones
2019-12-18 12:28 ` [PATCH v3 5/6] drm: atmel-hlcdc: prefer a lower pixel-clock than requested Claudiu Beznea
2020-01-02 9:08 ` Sam Ravnborg
2020-01-04 17:12 ` Sam Ravnborg
2020-01-06 9:25 ` Claudiu.Beznea
2020-01-06 19:02 ` Sam Ravnborg
2020-01-06 9:24 ` Claudiu.Beznea
2020-01-07 9:19 ` Peter Rosin
2019-12-18 12:28 ` [PATCH v3 6/6] Revert "drm: atmel-hlcdc: enable sys_clk during initalization." Claudiu Beznea
2020-01-02 9:05 ` [PATCH v3 0/6] fixes for atmel-hlcdc Sam Ravnborg
2020-01-02 16:05 ` Lee Jones
2020-01-02 16:21 ` Sam Ravnborg
2020-01-06 19:37 ` Sam Ravnborg
2020-01-07 10:17 ` [GIT PULL] Immutable branch between MFD and DRM due for the v5.6 merge window Lee Jones
2020-01-07 18:21 ` Sam Ravnborg
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