Commit e4a8db93 authored by Michael Dege's avatar Michael Dege Committed by Vinod Koul
Browse files

phy: renesas: r8a779f0-ether-serdes: add new step added to latest datasheet 



R-Car S4-8 datasheet Rev.1.20 describes some additional register
settings at the end of the initialization.

Signed-off-by: default avatarMichael Dege <michael.dege@renesas.com>
Link: https://lore.kernel.org/r/20250703-renesas-serdes-update-v4-2-1db5629cac2b@renesas.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent d337c557

drivers/phy/renesas/r8a779f0-ether-serdes.c

+28 −0
Original line number Diff line number Diff line
@@ -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)
@@ -319,6 +326,7 @@ 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)
@@ -332,6 +340,26 @@ 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);

}