From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Warren Subject: RE: [RFC PATCH] add slave mode support to tegra's i2c controller Date: Wed, 17 Aug 2011 23:57:14 -0700 Message-ID: <74CDBE0F657A3D45AFBB94109FB122FF04AF6F3066@HQMAIL01.nvidia.com> References: <201108172101.27170.marvin24@gmx.de> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <201108172101.27170.marvin24-Mmb7MZpHnFY@public.gmane.org> Content-Language: en-US Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Marc Dietrich , "linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" Cc: "linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org" , "linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org" , Colin Cross , Olof Johansson List-Id: linux-tegra@vger.kernel.org TWFyYyBEaWV0cmljaCB3cm90ZSBhdCBXZWRuZXNkYXksIEF1Z3VzdCAxNywgMjAxMSAxOjAxIFBN Og0KPiB0aGUgcGF0Y2ggYmVsb3cgYWRkcyBzbGF2ZSBtb2RlIHRvIHRlZ3JhJ3MgaTJjIGNvbnRy b2xsZXIuIEkgdHJpZWQgdG8gbWFrZSBpdCBhcw0KPiBzbWFsbCBhcyBwb3NzaWJsZS4gSXQgaXMg bmVlZGVkIHRvIGFsbG93IHRoZSBudmVjIGRyaXZlciB0byBkZWxpZ2F0ZSB0aGUNCj4gaW5pdGlh bGl6YXRpb24gdG8gdGhlIGkyYy10ZWdyYSBkcml2ZXIgYXMgcGFydCBvZiBpdHMgY2xlYW51cC4g UGF0Y2ggaXMgdGVzdGVkDQo+IHdpdGggb3VyIHZlcnNpb24gb2YgbnZlYy4gUGF0Y2ggaXMgYWdh aW5zdCBhcm0tc29jICsgYm9hcmRzLTMuMi4gUGxlYXNlIHJldmlldw0KPiBhbmQgY29uc2lkZXIg aXQgZm9yIG1lcmdlLg0KDQpGb3JnaXZlIG15IGxhY2sgb2YgZmFtaWxpYXJpdHkgd2l0aCB0aGUg VGVncmEgSFcsIGJ1dCBpcyB0aGUgc2xhdmUNCmNvbnRyb2xsZXIgY29tcGxldGVseSBhdXRvbm9t b3VzPyBJJ20gY3VyaW91cyB3aGF0IGRhdGEgc2xhdmUgdHJhbnNhY3Rpb25zDQphY2Nlc3MsIHNp bmNlIHRoZXJlJ3Mgbm8gYWN0dWFsIGNvZGUgaGVyZSB0byByZXNwb25kIHRvIHRyYW5zYWN0aW9u cw0KZGlyZWN0ZWQgYXQgdGhlIHNsYXZlIGFkZHJlc3MgYW5kIHByb3ZpZGUgZGF0YSBpbiByZXNw b25zZS4NCg0KT3IgcHV0IGFub3RoZXIgd2F5LCBpcyB0aGlzIHBhdGNoIHJlYWxseSBhZGRpbmcg c2xhdmUgbW9kZSBzdXBwb3J0LCBvcg0KaXMgaXQganVzdCBwcm92aWRpbmcgYSB3YXkgdG8gcHJv Z3JhbSB0aGUgc2xhdmUgY29udHJvbGxlcidzIEkyQyBhZGRyZXNzPw0KDQpTb21lIGNvbW1lbnRz IGJlbG93Lg0KDQo+IGRpZmYgLS1naXQgYS9kcml2ZXJzL2kyYy9idXNzZXMvaTJjLXRlZ3JhLmMg Yi9kcml2ZXJzL2kyYy9idXNzZXMvaTJjLXRlZ3JhLmMNCi4uLg0KPiAtc3RydWN0IHRlZ3JhX2ky Y19kZXYgew0KPiAtCXN0cnVjdCBkZXZpY2UgKmRldjsNCj4gLQlzdHJ1Y3QgaTJjX2FkYXB0ZXIg YWRhcHRlcjsNCi4uLg0KPiAtfTsNCg0KTm90aGluZyBnb3QgYWRkZWQgdGhhdCBuZWVkZWQgdGhh dCBzdHJ1Y3QgZGVmaW5pdGlvbiBpbiBhIGhlYWRlciBmaWxlOw0Kd2FzIHRoZXJlIG1lYW50IHRv IGJlIGEgbmV3IGZpbGUgaW5jbHVkZWQgaW4gdGhlIHBhdGNoIHRoYXQgaW1wbGVtZW50cw0KdGhl IHNsYXZlIGRyaXZlciAoYW5kIG1ha2VmaWxlIGFuZCBwZXJoYXBzIEtjb25maWcgY2hhbmdlcz8p DQoNCj4gKwlpbnQgc2xhdmVfYWRkciA9IGkyY19kZXYtPmlzX3NsYXZlID8gMHhmYyA6IGkyY19k ZXYtPnNsYXZlX2FkZHI7DQoNCklzbid0IHRoYXQgYmFja3dhcmRzOyBkb24ndCB5b3Ugd2FudCB0 byBoYXJkLWNvZGUgdGhlIHNsYXZlIGFkZHJlc3MgYXMgMHhmYyBvbmx5DQp3aGVuIHRoZSBjb250 cm9sbGVyIGlzbid0IGludGVuZGVkIHRvIGJlIHVzZWQgaW4gc2xhdmUgbW9kZT8NCg0KPiAgCWky Y19kZXYtPmJ1c19jbGtfcmF0ZSA9IDEwMDAwMDsgLyogZGVmYXVsdCBjbG9jayByYXRlICovDQo+ ICAJaWYgKHBkYXRhKSB7DQo+ICAJCWkyY19kZXYtPmJ1c19jbGtfcmF0ZSA9IHBkYXRhLT5idXNf Y2xrX3JhdGU7DQo+ICsJCWkyY19kZXYtPmlzX3NsYXZlID0gcGRhdGEtPmlzX3NsYXZlOw0KPiAr CQlpMmNfZGV2LT5zbGF2ZV9hZGRyID0gcGRhdGEtPnNsYXZlX2FkZHI7DQoNCk1heWJlIHN0b3Jl IGEgcG9pbnRlciB0byBwZGF0YSBpdHNlbGYgcmF0aGVyIHRoYW4gaGF2aW5nIHRvIGNvcHkgdGhp cw0KbWFudWFsbHk7IGl0J2xsIGJlIG9uZSBsZXNzIHRoaW5nIHRvIHdvcnJ5IGFib3V0IHdoZW4g YWRkaW5nIGZpZWxkcyB0bw0KcGRhdGEuDQoNCi4uLg0KPiAtCXJldCA9IHJlcXVlc3RfaXJxKGky Y19kZXYtPmlycSwgdGVncmFfaTJjX2lzciwgMCwgcGRldi0+bmFtZSwgaTJjX2Rldik7DQo+IC0J aWYgKHJldCkgew0KPiAtCQlkZXZfZXJyKCZwZGV2LT5kZXYsICJGYWlsZWQgdG8gcmVxdWVzdCBp cnEgJWlcbiIsIGkyY19kZXYtPmlycSk7DQo+IC0JCWdvdG8gZXJyX2ZyZWU7DQo+ICsJaWYgKCFp MmNfZGV2LT5pc19zbGF2ZSkgew0KPiArCQlyZXQgPSByZXF1ZXN0X2lycShpMmNfZGV2LT5pcnEs IHRlZ3JhX2kyY19pc3IsIDAsIHBkZXYtPm5hbWUsIGkyY19kZXYpOw0KPiArCQlpZiAocmV0KSB7 DQo+ICsJCQlkZXZfZXJyKCZwZGV2LT5kZXYsICJGYWlsZWQgdG8gcmVxdWVzdCBpcnEgJWlcbiIs IGkyY19kZXYtPmlycSk7DQo+ICsJCQlnb3RvIGVycl9mcmVlOw0KPiArCQl9DQo+ICAJfQ0KDQpU aGlzIGFwcGVhcnMgdG8gbWFrZSBtYXN0ZXIgYW5kIHNsYXZlIG1vZGUgbXV0dWFsbHkgZXhjbHVz aXZlLiBEb2Vzbid0DQp0aGUgSFcgYWxsb3cgdXNlIG9mIGJvdGggY29udHJvbGxlcnMgb24gdGhl IHNhbWUgYnVzPw0KDQotLSANCm52cHVibGljDQoNCg==