| From c488f818341a4ade580282bc627c18fe99cb2aad Mon Sep 17 00:00:00 2001 |
| From: Simon Horman <horms+renesas@verge.net.au> |
| Date: Wed, 18 Oct 2017 09:21:28 +0200 |
| Subject: [PATCH 0177/1795] net: sh_eth: implement R-Car Gen[12] fallback |
| compatibility strings |
| |
| 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 is 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 R-Car Gen2. |
| |
| Signed-off-by: Simon Horman <horms+renesas@verge.net.au> |
| Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> |
| Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> |
| Signed-off-by: David S. Miller <davem@davemloft.net> |
| (cherry picked from commit b4804e0c71c144b673b6c53ca4acfcac6eb98704) |
| Signed-off-by: Simon Horman <horms+renesas@verge.net.au> |
| Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> |
| --- |
| 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 eee9a6ee349c..987d10c2c36c 100644 |
| --- a/drivers/net/ethernet/renesas/sh_eth.c |
| +++ b/drivers/net/ethernet/renesas/sh_eth.c |
| @@ -3072,6 +3072,8 @@ 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); |
| -- |
| 2.19.0 |
| |