6.6-stable review patch. If anyone has any objections, please let me know.
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From: Michael Dege michael.dege@renesas.com
[ Upstream commit e4a8db93b5ec9bca1cc66b295544899e3afd5e86 ]
R-Car S4-8 datasheet Rev.1.20 describes some additional register settings at the end of the initialization.
Signed-off-by: Michael Dege michael.dege@renesas.com Link: https://lore.kernel.org/r/20250703-renesas-serdes-update-v4-2-1db5629cac2b@r... Signed-off-by: Vinod Koul vkoul@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/phy/renesas/r8a779f0-ether-serdes.c | 28 +++++++++++++++++++++ 1 file changed, 28 insertions(+)
diff --git a/drivers/phy/renesas/r8a779f0-ether-serdes.c b/drivers/phy/renesas/r8a779f0-ether-serdes.c index 683b19bc411a8..59546301a6b9e 100644 --- a/drivers/phy/renesas/r8a779f0-ether-serdes.c +++ b/drivers/phy/renesas/r8a779f0-ether-serdes.c @@ -49,6 +49,13 @@ static void r8a779f0_eth_serdes_write32(void __iomem *addr, u32 offs, u32 bank, iowrite32(data, addr + offs); }
+static u32 r8a779f0_eth_serdes_read32(void __iomem *addr, u32 offs, u32 bank) +{ + iowrite32(bank, addr + R8A779F0_ETH_SERDES_BANK_SELECT); + + return ioread32(addr + offs); +} + static int r8a779f0_eth_serdes_reg_wait(struct r8a779f0_eth_serdes_channel *channel, u32 offs, u32 bank, u32 mask, u32 expected) @@ -261,6 +268,7 @@ static int r8a779f0_eth_serdes_hw_init_late(struct r8a779f0_eth_serdes_channel *channel) { int ret; + u32 val;
ret = r8a779f0_eth_serdes_chan_setting(channel); if (ret) @@ -274,6 +282,26 @@ static int r8a779f0_eth_serdes_hw_init_late(struct r8a779f0_eth_serdes_channel
r8a779f0_eth_serdes_write32(channel->addr, 0x03d0, 0x380, 0x0000);
+ val = r8a779f0_eth_serdes_read32(channel->addr, 0x00c0, 0x180); + r8a779f0_eth_serdes_write32(channel->addr, 0x00c0, 0x180, val | BIT(8)); + ret = r8a779f0_eth_serdes_reg_wait(channel, 0x0100, 0x180, BIT(0), 1); + if (ret) + return ret; + r8a779f0_eth_serdes_write32(channel->addr, 0x00c0, 0x180, val & ~BIT(8)); + ret = r8a779f0_eth_serdes_reg_wait(channel, 0x0100, 0x180, BIT(0), 0); + if (ret) + return ret; + + val = r8a779f0_eth_serdes_read32(channel->addr, 0x0144, 0x180); + r8a779f0_eth_serdes_write32(channel->addr, 0x0144, 0x180, val | BIT(4)); + ret = r8a779f0_eth_serdes_reg_wait(channel, 0x0180, 0x180, BIT(0), 1); + if (ret) + return ret; + r8a779f0_eth_serdes_write32(channel->addr, 0x0144, 0x180, val & ~BIT(4)); + ret = r8a779f0_eth_serdes_reg_wait(channel, 0x0180, 0x180, BIT(0), 0); + if (ret) + return ret; + return r8a779f0_eth_serdes_monitor_linkup(channel); }