can: rcar_canfd: Fix R-Car V3U CAN mode selection

When adding support for R-Car V3U, the Global FD Configuration register
(CFDGFDCFG) and the Channel-specific CAN-FD Configuration Registers
(CFDCmFDCFG) were mixed up.  Use the correct register, and apply the
selected CAN mode to all available channels.

Annotate the corresponding register bits, to make it clear they do
not exist on older variants.

Fixes: 45721c406dcf50d4 ("can: rcar_canfd: Add support for r8a779a0 SoC")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/all/388ddf312917eb9f6cc460a481f68402a876f9b5.1674499048.git.geert+renesas@glider.be
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/drivers/net/can/rcar/rcar_canfd.c b/drivers/net/can/rcar/rcar_canfd.c
index f6fa715..88de17d 100644 (file)
--- a/drivers/net/can/rcar/rcar_canfd.c
+++ b/drivers/net/can/rcar/rcar_canfd.c
@@ -197,8 +197,8 @@
 #define RCANFD_DCFG_DBRP(x)            (((x) & 0xff) << 0)
 
 /* RSCFDnCFDCmFDCFG */
-#define RCANFD_FDCFG_CLOE              BIT(30)
-#define RCANFD_FDCFG_FDOE              BIT(28)
+#define RCANFD_V3U_FDCFG_CLOE          BIT(30)
+#define RCANFD_V3U_FDCFG_FDOE          BIT(28)
 #define RCANFD_FDCFG_TDCE              BIT(9)
 #define RCANFD_FDCFG_TDCOC             BIT(8)
 #define RCANFD_FDCFG_TDCO(x)           (((x) & 0x7f) >> 16)
@@ -429,8 +429,8 @@
 #define RCANFD_C_RPGACC(r)             (0x1900 + (0x04 * (r)))
 
 /* R-Car V3U Classical and CAN FD mode specific register map */
-#define RCANFD_V3U_CFDCFG              (0x1314)
 #define RCANFD_V3U_DCFG(m)             (0x1400 + (0x20 * (m)))
+#define RCANFD_V3U_FDCFG(m)            (0x1404 + (0x20 * (m)))
 
 #define RCANFD_V3U_GAFL_OFFSET         (0x1800)
 
@@ -689,12 +689,13 @@ static void rcar_canfd_tx_failure_cleanup(struct net_device *ndev)
 static void rcar_canfd_set_mode(struct rcar_canfd_global *gpriv)
 {
        if (is_v3u(gpriv)) {
-               if (gpriv->fdmode)
-                       rcar_canfd_set_bit(gpriv->base, RCANFD_V3U_CFDCFG,
-                                          RCANFD_FDCFG_FDOE);
-               else
-                       rcar_canfd_set_bit(gpriv->base, RCANFD_V3U_CFDCFG,
-                                          RCANFD_FDCFG_CLOE);
+               u32 ch, val = gpriv->fdmode ? RCANFD_V3U_FDCFG_FDOE
+                                           : RCANFD_V3U_FDCFG_CLOE;
+
+               for_each_set_bit(ch, &gpriv->channels_mask,
+                                gpriv->info->max_channels)
+                       rcar_canfd_set_bit(gpriv->base, RCANFD_V3U_FDCFG(ch),
+                                          val);
        } else {
                if (gpriv->fdmode)
                        rcar_canfd_set_bit(gpriv->base, RCANFD_GRMCFG,