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[2a01:c22:7602:4e00:f22f:74ff:fe21:725]) by smtp.googlemail.com with ESMTPSA id q7sm12347527wmq.33.2021.07.17.16.37.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 17 Jul 2021 16:37:30 -0700 (PDT) From: Martin Blumenstingl To: linux-iio@vger.kernel.org, linux-amlogic@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, lars@metafoo.de, jic23@kernel.org, Martin Blumenstingl Subject: [PATCH 1/3] iio: adc: meson-saradc: Disable BL30 integration on G12A and newer SoCs Date: Sun, 18 Jul 2021 01:37:16 +0200 Message-Id: <20210717233718.332267-2-martin.blumenstingl@googlemail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210717233718.332267-1-martin.blumenstingl@googlemail.com> References: <20210717233718.332267-1-martin.blumenstingl@googlemail.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210717_163732_138497_9895B1F4 X-CRM114-Status: GOOD ( 12.85 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org G12A and newer don't use the SAR ADC to read the SoC temperature from within the firmware. Instead there's now a dedicated thermal sensor. Disable the BL30 integration for G12A and newer SoCs to save a few CPU cycles when reading samples. Adding a separate struct meson_sar_adc_data is a good idea anyways because starting with G12A there's some extra registers to read the samples in a simplified way. Signed-off-by: Martin Blumenstingl --- drivers/iio/adc/meson_saradc.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c index 66dc452d643a..e140db3e4016 100644 --- a/drivers/iio/adc/meson_saradc.c +++ b/drivers/iio/adc/meson_saradc.c @@ -1104,6 +1104,14 @@ static const struct meson_sar_adc_param meson_sar_adc_gxl_param = { .resolution = 12, }; +static const struct meson_sar_adc_param meson_sar_adc_g12a_param = { + .has_bl30_integration = false, + .clock_rate = 1200000, + .bandgap_reg = MESON_SAR_ADC_REG11, + .regmap_config = &meson_sar_adc_regmap_config_gxbb, + .resolution = 12, +}; + static const struct meson_sar_adc_data meson_sar_adc_meson8_data = { .param = &meson_sar_adc_meson8_param, .name = "meson-meson8-saradc", @@ -1140,7 +1148,7 @@ static const struct meson_sar_adc_data meson_sar_adc_axg_data = { }; static const struct meson_sar_adc_data meson_sar_adc_g12a_data = { - .param = &meson_sar_adc_gxl_param, + .param = &meson_sar_adc_g12a_param, .name = "meson-g12a-saradc", };