From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: "Pandruvada, Srinivas" To: "Song, Hongyan" , "linux-iio@vger.kernel.org" , "jic23@kernel.org" Subject: Re: [PATCH] iio: hid-sensors: Increase the precision of scale Date: Mon, 31 Oct 2016 00:34:13 +0000 Message-ID: <1477873875.8025.48.camel@intel.com> References: <1477359007-17240-1-git-send-email-hongyan.song@intel.com> <88ae9a62-24ec-13ba-d1f2-8b8d208cf031@kernel.org> In-Reply-To: <88ae9a62-24ec-13ba-d1f2-8b8d208cf031@kernel.org> Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 List-ID: T24gU3VuLCAyMDE2LTEwLTMwIGF0IDE2OjIyICswMDAwLCBKb25hdGhhbiBDYW1lcm9uIHdyb3Rl Og0KPiBPbiAyNS8xMC8xNiAwMjozMCwgU29uZyBIb25neWFuIHdyb3RlOg0KPiA+IA0KPiA+IFdo aWxlIHRlc3RpbmcsIGl0IHdhcyBvYnNlcnZlZCB0aGF0IG9uIHNvbWUgcGxhdGZvcm1zIHRoZSBz Y2FsZQ0KPiA+IHZhbHVlDQo+ID4gZnJvbSBpaW8gc3lzZnMgZm9yIGd5cm9zY29wZSBpcyBhbHdh eXMgMCAoRS5nLiBZb2dhIDI2MCkuIFRoaXMNCj4gPiByZXN1bHRzDQo+ID4gaW4gdGhlIGZpbmFs IGFuZ3VsYXIgdmVsb2NpdHkgY29tcG9uZW50IHZhbHVlcyB0byBiZSB6ZXJvcy4NCj4gPiANCj4g PiBUaGlzIGlzIGNhdXNlZCBieSBpbnN1ZmZpY2llbnQgcHJlY2lzaW9uIG9mIHNjYWxlIHZhbHVl IGRpc3BsYXllZA0KPiA+IGluIHN5c2ZzLg0KPiA+IElmIHRoZSBwcmVjaXNpb24gaXMgY2hhbmdl ZCB0byBuYW5vIGZyb20gY3VycmVudCBtaWNybywgdGhlbiB0aGlzDQo+ID4gaXMNCj4gPiBzdWZm aWNpZW50IHRvIGRpc3BsYXkgdGhlIHNjYWxlIHZhbHVlIG9uIHRoaXMgcGxhdGZvcm0uDQo+ID4g U2luY2UgdGhpcyBjYW4gYmUgYSBwcm9ibGVtIGZvciBhbGwgb3RoZXIgSElEIHNlbnNvcnMsIGlu Y3JlYXNlDQo+ID4gc2NhbGUNCj4gPiBwcmVjaXNpb24gb2YgYWxsIEhJRCBzZW5zb3JzIHRvIG5h bm8gZnJvbSBjdXJyZW50IG1pY3JvLg0KPiA+IA0KPiA+IFJlc3VsdHMgb24gWW9nYSAyNjA6DQo+ ID4gDQo+ID4gbmFtZQkJc2NhbGUgYmVmb3JlCXNjYWxlIG5vdw0KPiA+IC0tLS0tLS0tLS0tLS0t LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tDQo+ID4gZ3lyb18zZAkJMC4wMDAwMDAJMC4w MDAwMDAxNzQNCj4gPiBhbHMJCQkwLjAwMTAwMAkwLjAwMTAwMDAwMA0KPiA+IG1hZ25fM2QJCTAu MDAwMDAxCTAuMDAwMDAxMDAwDQo+ID4gYWNjZWxfM2QJCTAuMDAwMDA5CTAuMDAwMDA5ODA2DQo+ ID4gDQo+ID4gU2lnbmVkLW9mZi1ieTogU29uZyBIb25neWFuIDxob25neWFuLnNvbmdAaW50ZWwu Y29tPg0KQWNrZWQtYnk6IFNyaW5pdmFzIFBhbmRydXZhZGEgPHNyaW5pdmFzLnBhbmRydXZhZGFA bGludXguaW50ZWwuY29tPg0KDQpIaSBKb25hdGhhbiwNCj4gSGkNCj4gDQo+IExvb2tzIHJpZ2h0 IHRvIG1lLCBTcmluaXZhcywgSSdkIGxpa2UgeW91ciBBY2sgb24gdGhpcyBpZGVhbGx5Lg0KDQpJ IGhhdmUgYWRkZWQgbXkgQUNLLg0KDQpUaGFua3MsDQpTcmluaXZhcw0KDQo+IHRoYW5rcywNCj4g DQo+IEpvbmF0aGFuDQo+ID4gDQo+ID4gLS0tDQo+ID4gwqAuLi4vaWlvL2NvbW1vbi9oaWQtc2Vu c29ycy9oaWQtc2Vuc29yLWF0dHJpYnV0ZXMuYyB8IDU2DQo+ID4gKysrKysrKysrKystLS0tLS0t LS0tLQ0KPiA+IMKgMSBmaWxlIGNoYW5nZWQsIDI4IGluc2VydGlvbnMoKyksIDI4IGRlbGV0aW9u cygtKQ0KPiA+IA0KPiA+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2lpby9jb21tb24vaGlkLXNlbnNv cnMvaGlkLXNlbnNvci1hdHRyaWJ1dGVzLmMgDQo+ID4gYi9kcml2ZXJzL2lpby9jb21tb24vaGlk LXNlbnNvcnMvaGlkLXNlbnNvci1hdHRyaWJ1dGVzLmMNCj4gPiBpbmRleCBkYzMzYzFkLi5iNWJl ZWE1MyAxMDA2NDQNCj4gPiAtLS0gYS9kcml2ZXJzL2lpby9jb21tb24vaGlkLXNlbnNvcnMvaGlk LXNlbnNvci1hdHRyaWJ1dGVzLmMNCj4gPiArKysgYi9kcml2ZXJzL2lpby9jb21tb24vaGlkLXNl bnNvcnMvaGlkLXNlbnNvci1hdHRyaWJ1dGVzLmMNCj4gPiBAQCAtMzAsMjYgKzMwLDI2IEBADQo+ ID4gwqAJdTMyIHVzYWdlX2lkOw0KPiA+IMKgCWludCB1bml0OyAvKiAwIGZvciBkZWZhdWx0IG90 aGVycyBmcm9tIEhJRCBzZW5zb3Igc3BlYyAqLw0KPiA+IMKgCWludCBzY2FsZV92YWwwOyAvKiBz Y2FsZSwgd2hvbGUgbnVtYmVyICovDQo+ID4gLQlpbnQgc2NhbGVfdmFsMTsgLyogc2NhbGUsIGZy YWN0aW9uIGluIG1pY3JvcyAqLw0KPiA+ICsJaW50IHNjYWxlX3ZhbDE7IC8qIHNjYWxlLCBmcmFj dGlvbiBpbiBuYW5vcyAqLw0KPiA+IMKgfSB1bml0X2NvbnZlcnNpb25bXSA9IHsNCj4gPiAtCXtI SURfVVNBR0VfU0VOU09SX0FDQ0VMXzNELCAwLCA5LCA4MDY2NTB9LA0KPiA+ICsJe0hJRF9VU0FH RV9TRU5TT1JfQUNDRUxfM0QsIDAsIDksIDgwNjY1MDAwMH0sDQo+ID4gwqAJe0hJRF9VU0FHRV9T RU5TT1JfQUNDRUxfM0QsDQo+ID4gwqAJCUhJRF9VU0FHRV9TRU5TT1JfVU5JVFNfTUVURVJTX1BF Ul9TRUNfU1FSRCwgMSwgMH0sDQo+ID4gwqAJe0hJRF9VU0FHRV9TRU5TT1JfQUNDRUxfM0QsDQo+ ID4gLQkJSElEX1VTQUdFX1NFTlNPUl9VTklUU19HLCA5LCA4MDY2NTB9LA0KPiA+ICsJCUhJRF9V U0FHRV9TRU5TT1JfVU5JVFNfRywgOSwgODA2NjUwMDAwfSwNCj4gPiDCoA0KPiA+IC0Je0hJRF9V U0FHRV9TRU5TT1JfR1lST18zRCwgMCwgMCwgMTc0NTN9LA0KPiA+ICsJe0hJRF9VU0FHRV9TRU5T T1JfR1lST18zRCwgMCwgMCwgMTc0NTMyOTN9LA0KPiA+IMKgCXtISURfVVNBR0VfU0VOU09SX0dZ Uk9fM0QsDQo+ID4gwqAJCUhJRF9VU0FHRV9TRU5TT1JfVU5JVFNfUkFESUFOU19QRVJfU0VDT05E LCAxLCAwfSwNCj4gPiDCoAl7SElEX1VTQUdFX1NFTlNPUl9HWVJPXzNELA0KPiA+IC0JCUhJRF9V U0FHRV9TRU5TT1JfVU5JVFNfREVHUkVFU19QRVJfU0VDT05ELCAwLA0KPiA+IDE3NDUzfSwNCj4g PiArCQlISURfVVNBR0VfU0VOU09SX1VOSVRTX0RFR1JFRVNfUEVSX1NFQ09ORCwgMCwNCj4gPiAx NzQ1MzI5M30sDQo+ID4gwqANCj4gPiAtCXtISURfVVNBR0VfU0VOU09SX0NPTVBBU1NfM0QsIDAs IDAsIDEwMDB9LA0KPiA+ICsJe0hJRF9VU0FHRV9TRU5TT1JfQ09NUEFTU18zRCwgMCwgMCwgMTAw MDAwMH0sDQo+ID4gwqAJe0hJRF9VU0FHRV9TRU5TT1JfQ09NUEFTU18zRCwNCj4gPiBISURfVVNB R0VfU0VOU09SX1VOSVRTX0dBVVNTLCAxLCAwfSwNCj4gPiDCoA0KPiA+IC0Je0hJRF9VU0FHRV9T RU5TT1JfSU5DTElOT01FVEVSXzNELCAwLCAwLCAxNzQ1M30sDQo+ID4gKwl7SElEX1VTQUdFX1NF TlNPUl9JTkNMSU5PTUVURVJfM0QsIDAsIDAsIDE3NDUzMjkzfSwNCj4gPiDCoAl7SElEX1VTQUdF X1NFTlNPUl9JTkNMSU5PTUVURVJfM0QsDQo+ID4gLQkJSElEX1VTQUdFX1NFTlNPUl9VTklUU19E RUdSRUVTLCAwLCAxNzQ1M30sDQo+ID4gKwkJSElEX1VTQUdFX1NFTlNPUl9VTklUU19ERUdSRUVT LCAwLCAxNzQ1MzI5M30sDQo+ID4gwqAJe0hJRF9VU0FHRV9TRU5TT1JfSU5DTElOT01FVEVSXzNE LA0KPiA+IMKgCQlISURfVVNBR0VfU0VOU09SX1VOSVRTX1JBRElBTlMsIDEsIDB9LA0KPiA+IMKg DQo+ID4gQEAgLTU3LDcgKzU3LDcgQEANCj4gPiDCoAl7SElEX1VTQUdFX1NFTlNPUl9BTFMsIEhJ RF9VU0FHRV9TRU5TT1JfVU5JVFNfTFVYLCAxLCAwfSwNCj4gPiDCoA0KPiA+IMKgCXtISURfVVNB R0VfU0VOU09SX1BSRVNTVVJFLCAwLCAxMDAsIDB9LA0KPiA+IC0Je0hJRF9VU0FHRV9TRU5TT1Jf UFJFU1NVUkUsIEhJRF9VU0FHRV9TRU5TT1JfVU5JVFNfUEFTQ0FMLA0KPiA+IDAsIDEwMDB9LA0K PiA+ICsJe0hJRF9VU0FHRV9TRU5TT1JfUFJFU1NVUkUsIEhJRF9VU0FHRV9TRU5TT1JfVU5JVFNf UEFTQ0FMLA0KPiA+IDAsIDEwMDAwMDB9LA0KPiA+IMKgfTsNCj4gPiDCoA0KPiA+IMKgc3RhdGlj IGludCBwb3dfMTAodW5zaWduZWQgcG93ZXIpDQo+ID4gQEAgLTI2NiwxNSArMjY2LDE1IEBAIGlu dCBoaWRfc2Vuc29yX3dyaXRlX3Jhd19oeXN0X3ZhbHVlKHN0cnVjdA0KPiA+IGhpZF9zZW5zb3Jf Y29tbW9uICpzdCwNCj4gPiDCoC8qDQo+ID4gwqAgKiBUaGlzIGZ1Y3Rpb24gYXBwbGllcyB0aGUg dW5pdCBleHBvbmVudCB0byB0aGUgc2NhbGUuDQo+ID4gwqAgKiBGb3IgZXhhbXBsZToNCj4gPiAt ICogOS44MDY2NTAgLT5leHA6Mi0+IHZhbDBbOTgwXXZhbDFbNjY1MDAwXQ0KPiA+IC0gKiA5LjAw MDgwNiAtPmV4cDoyLT4gdmFsMFs5MDBddmFsMVs4MDYwMF0NCj4gPiAtICogMC4xNzQ1MzUgLT5l eHA6Mi0+IHZhbDBbMTdddmFsMVs0NTM1MDBdDQo+ID4gLSAqIDEuMDAxNzQ1IC0+ZXhwOjAtPiB2 YWwwWzFddmFsMVsxNzQ1XQ0KPiA+IC0gKiAxLjAwMTc0NSAtPmV4cDoyLT4gdmFsMFsxMDBddmFs MVsxNzQ1MDBdDQo+ID4gLSAqIDEuMDAxNzQ1IC0+ZXhwOjQtPiB2YWwwWzEwMDE3XXZhbDFbNDUw MDAwXQ0KPiA+IC0gKiA5LjgwNjY1MCAtPmV4cDotMi0+IHZhbDBbMF12YWwxWzk4MDY2XQ0KPiA+ ICsgKiA5LjgwNjY1MDAwMCAtPmV4cDoyLT4gdmFsMFs5ODBddmFsMVs2NjUwMDAwMDBdDQo+ID4g KyAqIDkuMDAwODA2MDAwIC0+ZXhwOjItPiB2YWwwWzkwMF12YWwxWzgwNjAwMDAwXQ0KPiA+ICsg KiAwLjE3NDUzNTI5MyAtPmV4cDoyLT4gdmFsMFsxN112YWwxWzQ1MzUyOTMwMF0NCj4gPiArICog MS4wMDE3NDUzMjkgLT5leHA6MC0+IHZhbDBbMV12YWwxWzE3NDUzMjldDQo+ID4gKyAqIDEuMDAx NzQ1MzI5IC0+ZXhwOjItPiB2YWwwWzEwMF12YWwxWzE3NDUzMjkwMF0NCj4gPiArICogMS4wMDE3 NDUzMjkgLT5leHA6NC0+IHZhbDBbMTAwMTdddmFsMVs0NTMyOTAwMDBdDQo+ID4gKyAqIDkuODA2 NjUwMDAwIC0+ZXhwOi0yLT4gdmFsMFswXXZhbDFbOTgwNjY1MDBdDQo+ID4gwqAgKi8NCj4gPiAt c3RhdGljIHZvaWQgYWRqdXN0X2V4cG9uZW50X21pY3JvKGludCAqdmFsMCwgaW50ICp2YWwxLCBp bnQNCj4gPiBzY2FsZTAsDQo+ID4gK3N0YXRpYyB2b2lkIGFkanVzdF9leHBvbmVudF9uYW5vKGlu dCAqdmFsMCwgaW50ICp2YWwxLCBpbnQgc2NhbGUwLA0KPiA+IMKgCQkJCcKgwqBpbnQgc2NhbGUx LCBpbnQgZXhwKQ0KPiA+IMKgew0KPiA+IMKgCWludCBpOw0KPiA+IEBAIC0yODUsMzIgKzI4NSwz MiBAQCBzdGF0aWMgdm9pZCBhZGp1c3RfZXhwb25lbnRfbWljcm8oaW50ICp2YWwwLA0KPiA+IGlu dCAqdmFsMSwgaW50IHNjYWxlMCwNCj4gPiDCoAlpZiAoZXhwID4gMCkgew0KPiA+IMKgCQkqdmFs MCA9IHNjYWxlMCAqIHBvd18xMChleHApOw0KPiA+IMKgCQlyZXMgPSAwOw0KPiA+IC0JCWlmIChl eHAgPiA2KSB7DQo+ID4gKwkJaWYgKGV4cCA+IDkpIHsNCj4gPiDCoAkJCSp2YWwxID0gMDsNCj4g PiDCoAkJCXJldHVybjsNCj4gPiDCoAkJfQ0KPiA+IMKgCQlmb3IgKGkgPSAwOyBpIDwgZXhwOyAr K2kpIHsNCj4gPiAtCQkJeCA9IHNjYWxlMSAvIHBvd18xMCg1IC0gaSk7DQo+ID4gKwkJCXggPSBz Y2FsZTEgLyBwb3dfMTAoOCAtIGkpOw0KPiA+IMKgCQkJcmVzICs9IChwb3dfMTAoZXhwIC0gMSAt IGkpICogeCk7DQo+ID4gLQkJCXNjYWxlMSA9IHNjYWxlMSAlIHBvd18xMCg1IC0gaSk7DQo+ID4g KwkJCXNjYWxlMSA9IHNjYWxlMSAlIHBvd18xMCg4IC0gaSk7DQo+ID4gwqAJCX0NCj4gPiDCoAkJ KnZhbDAgKz0gcmVzOw0KPiA+IMKgCQkJKnZhbDEgPSBzY2FsZTEgKiBwb3dfMTAoZXhwKTsNCj4g PiDCoAl9IGVsc2UgaWYgKGV4cCA8IDApIHsNCj4gPiDCoAkJZXhwID0gYWJzKGV4cCk7DQo+ID4g LQkJaWYgKGV4cCA+IDYpIHsNCj4gPiArCQlpZiAoZXhwID4gOSkgew0KPiA+IMKgCQkJKnZhbDAg PSAqdmFsMSA9IDA7DQo+ID4gwqAJCQlyZXR1cm47DQo+ID4gwqAJCX0NCj4gPiDCoAkJKnZhbDAg PSBzY2FsZTAgLyBwb3dfMTAoZXhwKTsNCj4gPiDCoAkJcmVtID0gc2NhbGUwICUgcG93XzEwKGV4 cCk7DQo+ID4gwqAJCXJlcyA9IDA7DQo+ID4gLQkJZm9yIChpID0gMDsgaSA8ICg2IC0gZXhwKTsg KytpKSB7DQo+ID4gLQkJCXggPSBzY2FsZTEgLyBwb3dfMTAoNSAtIGkpOw0KPiA+IC0JCQlyZXMg Kz0gKHBvd18xMCg1IC0gZXhwIC0gaSkgKiB4KTsNCj4gPiAtCQkJc2NhbGUxID0gc2NhbGUxICUg cG93XzEwKDUgLSBpKTsNCj4gPiArCQlmb3IgKGkgPSAwOyBpIDwgKDkgLSBleHApOyArK2kpIHsN Cj4gPiArCQkJeCA9IHNjYWxlMSAvIHBvd18xMCg4IC0gaSk7DQo+ID4gKwkJCXJlcyArPSAocG93 XzEwKDggLSBleHAgLSBpKSAqIHgpOw0KPiA+ICsJCQlzY2FsZTEgPSBzY2FsZTEgJSBwb3dfMTAo OCAtIGkpOw0KPiA+IMKgCQl9DQo+ID4gLQkJKnZhbDEgPSByZW0gKiBwb3dfMTAoNiAtIGV4cCkg KyByZXM7DQo+ID4gKwkJKnZhbDEgPSByZW0gKiBwb3dfMTAoOSAtIGV4cCkgKyByZXM7DQo+ID4g wqAJfSBlbHNlIHsNCj4gPiDCoAkJKnZhbDAgPSBzY2FsZTA7DQo+ID4gwqAJCSp2YWwxID0gc2Nh bGUxOw0KPiA+IEBAIC0zMzIsMTQgKzMzMiwxNCBAQCBpbnQgaGlkX3NlbnNvcl9mb3JtYXRfc2Nh bGUodTMyIHVzYWdlX2lkLA0KPiA+IMKgCQkJdW5pdF9jb252ZXJzaW9uW2ldLnVuaXQgPT0gYXR0 cl9pbmZvLQ0KPiA+ID51bml0cykgew0KPiA+IMKgCQkJZXhwwqDCoD0gaGlkX3NlbnNvcl9jb252 ZXJ0X2V4cG9uZW50KA0KPiA+IMKgCQkJCQkJYXR0cl9pbmZvLQ0KPiA+ID51bml0X2V4cG8pOw0K PiA+IC0JCQlhZGp1c3RfZXhwb25lbnRfbWljcm8odmFsMCwgdmFsMSwNCj4gPiArCQkJYWRqdXN0 X2V4cG9uZW50X25hbm8odmFsMCwgdmFsMSwNCj4gPiDCoAkJCQkJdW5pdF9jb252ZXJzaW9uW2ld LnNjYWxlX3YNCj4gPiBhbDAsDQo+ID4gwqAJCQkJCXVuaXRfY29udmVyc2lvbltpXS5zY2FsZV92 DQo+ID4gYWwxLCBleHApOw0KPiA+IMKgCQkJYnJlYWs7DQo+ID4gwqAJCX0NCj4gPiDCoAl9DQo+ ID4gwqANCj4gPiAtCXJldHVybiBJSU9fVkFMX0lOVF9QTFVTX01JQ1JPOw0KPiA+ICsJcmV0dXJu IElJT19WQUxfSU5UX1BMVVNfTkFOTzsNCj4gPiDCoH0NCj4gPiDCoEVYUE9SVF9TWU1CT0woaGlk X3NlbnNvcl9mb3JtYXRfc2NhbGUpOw0KPiA+IMKgDQo+ID4g