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Code
8629eea901
linux/drivers/net/dsa/b53
History
Jonas Gorski bc1a65eb81 net: dsa: b53: do not touch DLL_IQQD on bcm53115 
According to OpenMDK, bit 2 of the RGMII register has a different
meaning for BCM53115 [1]:

"DLL_IQQD         1: In the IDDQ mode, power is down0: Normal function
                  mode"

Configuring RGMII delay works without setting this bit, so let's keep it
at the default. For other chips, we always set it, so not clearing it
is not an issue.

One would assume BCM53118 works the same, but OpenMDK is not quite sure
what this bit actually means [2]:

"BYPASS_IMP_2NS_DEL #1: In the IDDQ mode, power is down#0: Normal
                    function mode1: Bypass dll65_2ns_del IP0: Use
                    dll65_2ns_del IP"

So lets keep setting it for now.

[1] https://github.com/Broadcom-Network-Switching-Software/OpenMDK/blob/master/cdk/PKG/chip/bcm53115/bcm53115_a0_defs.h#L19871
[2] https://github.com/Broadcom-Network-Switching-Software/OpenMDK/blob/master/cdk/PKG/chip/bcm53118/bcm53118_a0_defs.h#L14392

Fixes: 967dd82ffc ("net: dsa: b53: Add support for Broadcom RoboSwitch")
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Link: https://patch.msgid.link/20250602193953.1010487-6-jonas.gorski@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-06-05 11:07:35 +02:00
..
b53_common.c net: dsa: b53: do not touch DLL_IQQD on bcm53115 2025-06-05 11:07:35 +02:00
b53_mdio.c net: dsa: b53: mdio: add support for BCM53101 2025-02-19 18:41:43 -08:00
b53_mmap.c net: dsa: Switch back to struct platform_driver::remove() 2024-10-04 16:39:57 -07:00
b53_priv.h net: dsa: b53: implement setting ageing time 2025-05-12 18:51:09 -07:00
b53_regs.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2025-05-15 11:28:30 -07:00
b53_serdes.c net: remove phylink_pcs .neg_mode boolean 2025-02-14 17:09:50 -08:00
b53_serdes.h net: dsa: use capital "OR" for multiple licenses in SPDX 2023-08-24 12:02:53 -07:00
b53_spi.c move asm/unaligned.h to linux/unaligned.h 2024-10-02 17:23:23 -04:00
b53_srab.c net: dsa: Switch back to struct platform_driver::remove() 2024-10-04 16:39:57 -07:00
Kconfig net: dsa: modularize DSA_TAG_PROTO_NONE 2022-11-22 20:41:45 -08:00
Makefile