From mboxrd@z Thu Jan 1 00:00:00 1970 From: Simon Horman Subject: [PATCH net-next 3/3] net: sh_eth: implement R-Car Gen[12] fallback compatibility strings Date: Tue, 17 Oct 2017 09:47:47 +0200 Message-ID: <20171017074747.24159-4-horms+renesas@verge.net.au> References: <20171017074747.24159-1-horms+renesas@verge.net.au> Cc: Magnus Damm , netdev@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Simon Horman To: David Miller , Sergei Shtylyov Return-path: Received: from kirsty.vergenet.net ([202.4.237.240]:41349 "EHLO kirsty.vergenet.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754177AbdJQHsF (ORCPT ); Tue, 17 Oct 2017 03:48:05 -0400 In-Reply-To: <20171017074747.24159-1-horms+renesas@verge.net.au> Sender: netdev-owner@vger.kernel.org List-ID: Implement fallback compatibility strings for R-Car Gen 1 and 2. In the case of Renesas R-Car hardware we know that there are generations of SoCs, f.e. Gen 1 and 2. But beyond that its not clear what the relationship between IP blocks might be. For example, I believe that r8a7790 is older than r8a7791 but that doesn't imply that the latter is a descendant of the former or vice versa. We can, however, by examining the documentation and behaviour of the hardware at run-time observe that the current driver implementation appears to be compatible with the IP blocks on SoCs within a given generation. For the above reasons and convenience when enabling new SoCs a per-generation fallback compatibility string scheme being adopted for drivers for Renesas SoCs. Note that R-Car Gen2 and RZ/G1 have many compatible IP blocks. The approach that has been consistently taken for other IP blocks is to name common code, compatibility strings and so on after Rcar Gen2. Signed-off-by: Simon Horman --- drivers/net/ethernet/renesas/sh_eth.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c index c9f92fc8555e..7e060aa9fbed 100644 --- a/drivers/net/ethernet/renesas/sh_eth.c +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -3095,6 +3095,8 @@ static const struct of_device_id sh_eth_match_table[] = { { .compatible = "renesas,ether-r8a7793", .data = &rcar_gen2_data }, { .compatible = "renesas,ether-r8a7794", .data = &rcar_gen2_data }, { .compatible = "renesas,ether-r7s72100", .data = &r7s72100_data }, + { .compatible = "renesas,rcar-gen1-ether", .data = &rcar_gen1_data }, + { .compatible = "renesas,rcar-gen2-ether", .data = &rcar_gen2_data }, { } }; MODULE_DEVICE_TABLE(of, sh_eth_match_table); -- 2.11.0