From: Billy Tsai <billy_tsai@aspeedtech.com>
To: <jic23@kernel.org>, <lars@metafoo.de>, <robh+dt@kernel.org>,
<joel@jms.id.au>, <andrew@aj.id.au>, <billy_tsai@aspeedtech.com>,
<colin.king@canonical.com>, <linux-iio@vger.kernel.org>,
<devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-aspeed@lists.ozlabs.org>, <linux-kernel@vger.kernel.org>,
<BMC-SW@aspeedtech.com>
Subject: [PATCH 1/2] iio: adc: aspeed: Remove the trim valid dts property.
Date: Mon, 31 Oct 2022 19:32:07 +0800 [thread overview]
Message-ID: <20221031113208.19194-1-billy_tsai@aspeedtech.com> (raw)
The dts property "aspeed,trim-data-valid" is used to determin whether to
read the OTP register. If the image with the aspeed,trim-data-vali
install to the chip without valid trimming data the adc controller will
become confused. This patch use the default otp value 0 as a criterion
for determining whether trimming data is valid instead of the dts
property. The chip with actually trimming value is 0 should be filter out.
Signed-off-by: Billy Tsai <billy_tsai@aspeedtech.com>
---
drivers/iio/adc/aspeed_adc.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/drivers/iio/adc/aspeed_adc.c b/drivers/iio/adc/aspeed_adc.c
index ffae64f39221..0f065f0bb8e7 100644
--- a/drivers/iio/adc/aspeed_adc.c
+++ b/drivers/iio/adc/aspeed_adc.c
@@ -201,6 +201,8 @@ static int aspeed_adc_set_trim_data(struct iio_dev *indio_dev)
((scu_otp) &
(data->model_data->trim_locate->field)) >>
__ffs(data->model_data->trim_locate->field);
+ if (!trimming_val)
+ trimming_val = 0x8;
}
dev_dbg(data->dev,
"trimming val = %d, offset = %08x, fields = %08x\n",
@@ -562,12 +564,9 @@ static int aspeed_adc_probe(struct platform_device *pdev)
if (ret)
return ret;
- if (of_find_property(data->dev->of_node, "aspeed,trim-data-valid",
- NULL)) {
- ret = aspeed_adc_set_trim_data(indio_dev);
- if (ret)
- return ret;
- }
+ ret = aspeed_adc_set_trim_data(indio_dev);
+ if (ret)
+ return ret;
if (of_find_property(data->dev->of_node, "aspeed,battery-sensing",
NULL)) {
--
2.25.1
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next reply other threads:[~2022-10-31 23:38 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-31 11:32 Billy Tsai [this message]
2022-10-31 11:32 ` [PATCH 2/2] dt-bindings: iio: adc: Remove the property "aspeed,trim-data-valid" Billy Tsai
2022-11-02 16:07 ` Rob Herring
2022-11-06 14:49 ` [PATCH 1/2] iio: adc: aspeed: Remove the trim valid dts property Jonathan Cameron
2022-11-07 2:34 ` Billy Tsai
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