From: Jaewon Kim <jaewon02.kim@samsung.com> To: Andi Shyti <andi.shyti@kernel.org>, Mark Brown <broonie@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>, Alim Akhtar <alim.akhtar@samsung.com> Cc: linux-spi@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Chanho Park <chanho61.park@samsung.com>, Jaewon Kim <jaewon02.kim@samsung.com> Subject: [PATCH] spi: s3c64xx: clear loopback bit after loopback test Date: Tue, 11 Jul 2023 17:20:20 +0900 [thread overview] Message-ID: <20230711082020.138165-1-jaewon02.kim@samsung.com> (raw) In-Reply-To: CGME20230711082508epcas2p3088d488035e7e2910bf087d640e9c268@epcas2p3.samsung.com When SPI loopback transfer is performed, S3C64XX_SPI_MODE_SELF_LOOPBACK bit still remained. It works as loopback even if the next transfer is not spi loopback mode. If not SPI_LOOP, needs to clear S3C64XX_SPI_MODE_SELF_LOOPBACK bit. Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com> --- drivers/spi/spi-s3c64xx.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index fd55697144cc..b6c2659a66ca 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -684,6 +684,8 @@ static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd) if ((sdd->cur_mode & SPI_LOOP) && sdd->port_conf->has_loopback) val |= S3C64XX_SPI_MODE_SELF_LOOPBACK; + else + val &= ~S3C64XX_SPI_MODE_SELF_LOOPBACK; writel(val, regs + S3C64XX_SPI_MODE_CFG); -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Jaewon Kim <jaewon02.kim@samsung.com> To: Andi Shyti <andi.shyti@kernel.org>, Mark Brown <broonie@kernel.org>, Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>, Alim Akhtar <alim.akhtar@samsung.com> Cc: linux-spi@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Chanho Park <chanho61.park@samsung.com>, Jaewon Kim <jaewon02.kim@samsung.com> Subject: [PATCH] spi: s3c64xx: clear loopback bit after loopback test Date: Tue, 11 Jul 2023 17:20:20 +0900 [thread overview] Message-ID: <20230711082020.138165-1-jaewon02.kim@samsung.com> (raw) In-Reply-To: CGME20230711082508epcas2p3088d488035e7e2910bf087d640e9c268@epcas2p3.samsung.com When SPI loopback transfer is performed, S3C64XX_SPI_MODE_SELF_LOOPBACK bit still remained. It works as loopback even if the next transfer is not spi loopback mode. If not SPI_LOOP, needs to clear S3C64XX_SPI_MODE_SELF_LOOPBACK bit. Signed-off-by: Jaewon Kim <jaewon02.kim@samsung.com> --- drivers/spi/spi-s3c64xx.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index fd55697144cc..b6c2659a66ca 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -684,6 +684,8 @@ static int s3c64xx_spi_config(struct s3c64xx_spi_driver_data *sdd) if ((sdd->cur_mode & SPI_LOOP) && sdd->port_conf->has_loopback) val |= S3C64XX_SPI_MODE_SELF_LOOPBACK; + else + val &= ~S3C64XX_SPI_MODE_SELF_LOOPBACK; writel(val, regs + S3C64XX_SPI_MODE_CFG); -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next parent reply other threads:[~2023-07-11 8:25 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <CGME20230711082508epcas2p3088d488035e7e2910bf087d640e9c268@epcas2p3.samsung.com> 2023-07-11 8:20 ` Jaewon Kim [this message] 2023-07-11 8:20 ` [PATCH] spi: s3c64xx: clear loopback bit after loopback test Jaewon Kim 2023-07-11 8:43 ` Chanho Park 2023-07-11 8:43 ` Chanho Park 2023-07-11 22:19 ` Andi Shyti 2023-07-11 22:19 ` Andi Shyti 2023-07-11 22:26 ` Mark Brown 2023-07-11 22:26 ` Mark Brown 2023-07-12 15:34 ` Mark Brown 2023-07-12 15:34 ` Mark Brown
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20230711082020.138165-1-jaewon02.kim@samsung.com \ --to=jaewon02.kim@samsung.com \ --cc=alim.akhtar@samsung.com \ --cc=andi.shyti@kernel.org \ --cc=broonie@kernel.org \ --cc=chanho61.park@samsung.com \ --cc=krzysztof.kozlowski@linaro.org \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-samsung-soc@vger.kernel.org \ --cc=linux-spi@vger.kernel.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.