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authorMin Li <min.li.xe@renesas.com>2020-02-21 23:03:51 +0300
committerDavid S. Miller <davem@davemloft.net>2020-02-25 00:08:46 +0300
commit57a10d8c1123068e3cb06434fbc9634f945d3062 (patch)
tree2f4b588e75fbe98919819558d3004a30e4f30ddc /drivers/ptp/Kconfig
parent04eed745615244525fb918fa7c0a86e811371536 (diff)
downloadlinux-57a10d8c1123068e3cb06434fbc9634f945d3062.tar.xz
ptp: Add a ptp clock driver for IDT 82P33 SMU.
The IDT 82P33 Synchronization Management Unit (SMU) family provides tools to manage timing references, clock sources and timing paths for IEEE 1588 / Precision Time Protocol (PTP) and Synchronous Ethernet (SyncE) based clocks. The device supports up to three independent timing paths that control: PTP clock synthesis; SyncE clock generation; and general purpose frequency translation. The device supports physical layer timing with Digital PLLs (DPLLs) and it supports packet based timing with Digitally Controlled Oscillators (DCOs). This patch adds support for ptp clock based on the device. Changes since v1: - As suggested by Richard Cochran: 1. Replace _mask_bit_count with the existing hweight8 2. Prefix all functions with idt82p33 3. Fix white space issues in Kconfig and Makefile 4. Remove forward declaration 5. Use adjfine instead of adjfreq for better resolution - As suggested by David Miller: 1. Replace CHAN_INIT macro with a static function idt82p33_channel_init 2. Employ reverse christmas tree ordering for local variables 3. Fix indentation problem by appropriate number of TAB then SPACE character Signed-off-by: Min Li <min.li.xe@renesas.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ptp/Kconfig')
-rw-r--r--drivers/ptp/Kconfig12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/ptp/Kconfig b/drivers/ptp/Kconfig
index 475c60dccaa4..3b424ffceb83 100644
--- a/drivers/ptp/Kconfig
+++ b/drivers/ptp/Kconfig
@@ -115,6 +115,18 @@ config PTP_1588_CLOCK_KVM
To compile this driver as a module, choose M here: the module
will be called ptp_kvm.
+config PTP_1588_CLOCK_IDT82P33
+ tristate "IDT 82P33xxx PTP clock"
+ depends on PTP_1588_CLOCK && I2C
+ default n
+ help
+ This driver adds support for using the IDT 82P33xxx as a PTP
+ clock. This clock is only useful if your time stamping MAC
+ is connected to the IDT chip.
+
+ To compile this driver as a module, choose M here: the module
+ will be called ptp_idt82p33.
+
config PTP_1588_CLOCK_IDTCM
tristate "IDT CLOCKMATRIX as PTP clock"
depends on PTP_1588_CLOCK && I2C