From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: [v3,4/7] dmaengine: stm32-dma: Add DMA/MDMA chaining support From: Vinod Koul Message-Id: <20181016144432.GR2400@vkoul-mobl> Date: Tue, 16 Oct 2018 20:14:32 +0530 To: Pierre Yves MORDRET Cc: Rob Herring , Mark Rutland , Alexandre Torgue , Maxime Coquelin , Dan Williams , devicetree@vger.kernel.org, dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org List-ID: T24gMTYtMTAtMTgsIDExOjE5LCBQaWVycmUgWXZlcyBNT1JEUkVUIHdyb3RlOgo+IAo+IAo+IE9u IDEwLzE1LzE4IDc6MTQgUE0sIFZpbm9kIHdyb3RlOgo+ID4gT24gMTAtMTAtMTgsIDA5OjAyLCBQ aWVycmUgWXZlcyBNT1JEUkVUIHdyb3RlOgo+ID4+Cj4gPj4KPiA+PiBPbiAxMC8xMC8yMDE4IDA2 OjAzIEFNLCBWaW5vZCB3cm90ZToKPiA+Pj4gT24gMDktMTAtMTgsIDEwOjQwLCBQaWVycmUgWXZl cyBNT1JEUkVUIHdyb3RlOgo+ID4+Pj4KPiA+Pj4+Cj4gPj4+PiBPbiAxMC8wNy8yMDE4IDA2OjAw IFBNLCBWaW5vZCB3cm90ZToKPiA+Pj4+PiBPbiAyOC0wOS0xOCwgMTU6MDEsIFBpZXJyZS1ZdmVz IE1PUkRSRVQgd3JvdGU6Cj4gPj4+Pj4+IFRoaXMgcGF0Y2ggYWRkcyBzdXBwb3J0IG9mIERNQS9N RE1BIGNoYWluaW5nIHN1cHBvcnQuCj4gPj4+Pj4+IEl0IGludHJvZHVjZXMgYW4gaW50ZXJtZWRp YXRlIHRyYW5zZmVyIGJldHdlZW4gcGVyaXBoZXJhbHMgYW5kIFNUTTMyIERNQS4KPiA+Pj4+Pj4g VGhpcyBpbnRlcm1lZGlhdGUgdHJhbnNmZXIgaXMgdHJpZ2dlcmVkIGJ5IFNXIGZvciBzaW5nbGUg TTJEIHRyYW5zZmVyIGFuZAo+ID4+Pj4+PiBieSBTVE0zMiBETUEgSVAgZm9yIGFsbCBvdGhlciBt b2RlcyAoc2csIGN5Y2xpYykgYW5kIGRpcmVjdGlvbiAoRDJNKS4KPiA+Pj4+Pj4KPiA+Pj4+Pj4g QSBnZW5lcmljIFNSQU0gYWxsb2NhdG9yIGlzIHVzZWQgZm9yIHRoaXMgaW50ZXJtZWRpYXRlIGJ1 ZmZlcgo+ID4+Pj4+PiBFYWNoIERNQSBjaGFubmVsIHdpbGwgYmUgYWJsZSB0byBkZWZpbmUgaXRz IFNSQU0gbmVlZHMgdG8gYWNoaWV2ZSBjaGFpbmluZwo+ID4+Pj4+PiBmZWF0dXJlIDogKDIgXiBv cmRlcikgKiBQQUdFX1NJWkUuCj4gPj4+Pj4+IEZvciBjeWNsaWMsIFNSQU0gYnVmZmVyIGlzIGRl cml2ZWQgZnJvbSBwZXJpb2QgbGVuZ3RoIChyb3VuZGVkIG9uCj4gPj4+Pj4+IFBBR0VfU0laRSku Cj4gPj4+Pj4KPiA+Pj4+PiBTbyBJSVVDLCB5b3UgY2hhaW4gdHdvIGRtYSB0eG5zIHRvZ2V0aGVy IGFuZCB0cmFuc2ZlciBkYXRhIHZpYSBhbiBTUkFNPwo+ID4+Pj4KPiA+Pj4+IENvcnJlY3QuIG9u ZSBETUEgaXMgRE1BdjIgKHN0bTMyLWRtYSkgYW5kIHRoZSBvdGhlciBpcyBNRE1BKHN0bTMyLW1k bWEpLgo+ID4+Pj4gSW50ZXJtZWRpYXRlIHRyYW5zZmVyIGlzIGJldHdlZW4gZGV2aWNlIGFuZCBt ZW1vcnkuCj4gPj4+PiBUaGlzIGludGVybWVkaWF0ZSB0cmFuc2ZlciBpcyB1c2luZyBTRFJBTS4K PiA+Pj4KPiA+Pj4gQWggc28geW91IHVzZSBkbWEgY2FsbHMgdG8gc2V0dXAgbWRtYSB4dGZlcnM/ IEkgZG9udCB0aGluayB0aGF0IGlzIGEKPiA+Pj4gZ29vZCBpZGVhLiBIb3cgZG8geW91IGtub3cg eW91IHNob3VsZCB1c2UgbWRtYSBmb3Igc3Vic2VxdWVudCB0cmFuc2Zlcj8KPiA+Pj4KPiA+Pgo+ ID4+IFdoZW4gdXNlciBiaW5kaW5ncyB0b2xkIHRvIHNldHVwIGNoYWluaW5nIGludGVybWVkaWF0 ZSBNRE1BIHRyYW5zZmVycyBhcmUgYWx3YXlzCj4gPj4gdHJpZ2dlcnMuCj4gPj4gRm9yIGluc3Rh bmNlIGlmIGEgdXNlciByZXF1ZXN0cyBhIERldjJNZW0gdHJhbnNmZXIgd2l0aCBjaGFpbmluZy4g RnJvbSBjbGllbnQKPiA+PiBwb3YgdGhpcyBpcyBzdGlsbCBhIHByZXBfc2xhdmVfc2cuIEludGVy bmFsbHkgRE1BdjIgaXMgc2V0dXAgaW4gY3ljbGljIG1vZGUgKGluCj4gPj4gZG91YmxlIGJ1ZmZl ciBtb2RlIGluZGVlZCA9PiAyIGJ1ZmZlciBvZiBQQUdFX1NJWkUvMikgYW5kIGRlc3RpbmF0aW9u IGlzIFNEUkFNLgo+ID4+IERNQXYyIHdpbGwgZmxpcC9mbG9wIG9uIHRob3NlIDIgYnVmZmVycy4K PiA+PiBBdCB0aGUgc2FtZSB0aW1lIERNQXYyIGRyaXZlciBwcmVwYXJlcyBhIE1ETUEgU0cgdGhh dCB3aWxsIGZldGNoIGRhdGEgZnJvbSB0aG9zZQo+ID4+IDIgYnVmZmVycyBpbiBTRFJBTSBhbmQg ZmlsbHMgZmluYWwgZGVzdGluYXRpb24gbWVtb3J5Lgo+ID4gCj4gPiBJIGFtIG5vdCBhYmxlIHRv IGZvbGxvdyBpcyB3aHkgZG9lcyBpdCBuZWVkIHRvIGJlIGludGVybmFsLCB3aHkgc2hvdWxkCj4g PiB0aGUgY2xpZW50IG5vdCBzZXQgdGhlIHR3byB0cmFuc2ZlcnMgYW5kIHRyaWdnZXIgdGhlbT8K PiA+IAo+IAo+IENsaWVudCBtYXkgdXNlIG9yIG5vdCBjaGFpbmluZzogZGVmaW5lZCB3aXRoaW4g RFQuIEFQSSBhbmQgZHluYW1pYyBhcmUgc2FtZSBhdAoKVGhhdCBzaG91bGQgYmUgdXB0byBjbGll bnQuLi4gQXMgYSBkbWFlbmdpbmUgZHJpdmVyIHlvdSBzaG91bGQgZW5hYmxlCmRhdGEgdHJhbnNm ZXIgZnJvbSBzcmMgdG8gZHN0bi4KCj4gZHJpdmVyIGNsaWVudCBsZXZlbC4gTW9yZW92ZXIgZHJp dmVyIGV4cG9zZXMgb25seSBETUF2MiBhbmQgbm90IGJvdGggRE1BdjIgYW5kCj4gTURNQS4gVGhp cyBpcyB0b3RhbGx5IGhpZGRlbiBmb3IgY2xpZW50LiBJZiBjbGllbnQgc2V0cyBib3RoIHRoaXMg d291bGQgaW1wbHkKCldoeSBzaG91bGQgYSBjb250cm9sbGVyIGJlIGhpZGRlbiBmcm9tIHVzZXIs IEkgZG9udCBzZWUgd2h5IHRoYXQgd291bGQKYmUgYSBnb29kIHRoaW5nCgo+IGNoYW5naW5nIGFs bCBkcml2ZXJzIHRoYXQgbWF5IHdhbnQgdXNlIGNoYWluaW5nLiBFdmVuIG1vcmUgdG8gZGVhbCB3 aXRoIERNQXYyCj4gYW5kIE1ETUEgYXQgaXRzIGxldmVsLgo+IFNpbmNlIERNQXYyIGRlYWxzIHdp dGggTURNQSwgYWxsIGRyaXZlcnMgYXJlIHNhbWUgYXMgYmVmb3JlLiBubyBjaGFuZ2VzIHJlcXVp cmVkLgoKSXQgaXMgbm90IGFib3V0IGNoYW5nZXMsIGl0IGlzIGFib3V0IHRoZSBTVyBtb2RlbCB5 b3Ugd2FudCB0byBoYXZlLgoKVGhlIGludGVybWVkaWF0ZSBTUkFNIHRyYW5zZmVycyBzaG91bGQg bm90IGJlIG1hZGUgd2l0aGluIERNQWVuZ2luZQpkcml2ZXIsIGNsaWVudCBjYW4gY2hvc2UgdG8g aGF2ZSB0d28gdHJhbnNmZXJzIGFuZCBjb3VwbGUgb3Igbm90LCBpdCBpcwp1cHRvIHRoZW0gdG8g Y2hvb3NlLiBTb3JyeSBJIGRvIG5vdCBsaWtlIHRoaXMgYWJzdHJhY3Rpb24gYW5kIHdvdWxkIGxp a2UKdG8gc2VlIGEgY2xlYW5lciBhcHByb2FjaAo=