Message ID | 1571834060-31580-1-git-send-email-eugen.hristev@microchip.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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Wed, 23 Oct 2019 12:40:14 +0000 From: <Eugen.Hristev@microchip.com> To: <robh+dt@kernel.org>, <Nicolas.Ferre@microchip.com>, <alexandre.belloni@bootlin.com>, <wsa@the-dreams.de>, <peda@axentia.se>, <Ludovic.Desroches@microchip.com>, <linux-i2c@vger.kernel.org>, <devicetree@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org> Subject: [PATCH v6 3/9] i2c: add support for filters optional properties Thread-Topic: [PATCH v6 3/9] i2c: add support for filters optional properties Thread-Index: AQHViZ8EmqljGdrD10aSBxnDJd1ZDQ== Date: Wed, 23 Oct 2019 12:40:14 +0000 Message-ID: <1571834060-31580-1-git-send-email-eugen.hristev@microchip.com> Accept-Language: en-US, ro-RO Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: PR0P264CA0096.FRAP264.PROD.OUTLOOK.COM (2603:10a6:100:18::36) To DM5PR11MB1242.namprd11.prod.outlook.com (2603:10b6:3:14::8) x-mailer: git-send-email 2.7.4 x-ms-exchange-messagesentrepresentingtype: 1 x-originating-ip: [94.177.32.156] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 527f708c-15ab-4338-adb9-08d757b62699 x-ms-traffictypediagnostic: DM5PR11MB1276: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: <DM5PR11MB1276EB92610121842431745DE86B0@DM5PR11MB1276.namprd11.prod.outlook.com> x-ms-oob-tlc-oobclassifiers: OLM:8882; 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diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index 5f6a498..6a5183c 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -1656,6 +1656,12 @@ void i2c_parse_fw_timings(struct device *dev, struct i2c_timings *t, bool use_de t->sda_fall_ns = t->scl_fall_ns; device_property_read_u32(dev, "i2c-sda-hold-time-ns", &t->sda_hold_ns); + + device_property_read_u32(dev, "i2c-digital-filter-width-ns", + &t->digital_filter_width_ns); + + device_property_read_u32(dev, "i2c-analog-filter-cutoff-frequency", + &t->analog_filter_cutoff_freq_hz); } EXPORT_SYMBOL_GPL(i2c_parse_fw_timings); diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 1361637..aaf57d9 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -575,6 +575,10 @@ struct i2c_lock_operations { * @scl_int_delay_ns: time IP core additionally needs to setup SCL in ns * @sda_fall_ns: time SDA signal takes to fall in ns; t(f) in the I2C specification * @sda_hold_ns: time IP core additionally needs to hold SDA in ns + * @digital_filter_width_ns: width in ns of spikes on i2c lines that the IP core + * digital filter can filter out + * @analog_filter_cutoff_freq_hz: threshold frequency for the low pass IP core + * analog filter */ struct i2c_timings { u32 bus_freq_hz; @@ -583,6 +587,8 @@ struct i2c_timings { u32 scl_int_delay_ns; u32 sda_fall_ns; u32 sda_hold_ns; + u32 digital_filter_width_ns; + u32 analog_filter_cutoff_freq_hz; }; /**