On 28.10.2021 18:57, Guenter Roeck wrote:
On 10/28/21 9:29 AM, Florian Fainelli wrote:
On 10/28/21 2:30 AM, Rafał Miłecki wrote:
From: Rafał Miłecki <rafal@xxxxxxxxxx>
Hardware supported by this driver goes back to the old bcm63xx days. It
was then reused in BCM7038 and later also in BCM4908.
Depending on SoC model registers layout differs a bit. This commit
introduces support for per-chipset registers offsets & adds BCM4908
layout.
Later on BCM63xx SoCs support should be added too (probably as platform
devices due to missing DT). Eventually this driver should replace
bcm63xx_wdt.c.
Seems unrelated / irrelevant in this commit log, except maybe after '---'.
Signed-off-by: Rafał Miłecki <rafal@xxxxxxxxxx>
---
[snip]
+
+static const u16 bcm7038_wdt_regs_bcm4908[] = {
+ [BCM63XX_WDT_REG_DEFVAL] = 0x28,
REG_DEFVAL is an odd name for this register. I can see that the
bcm63xx driver uses it, but in reality it seems to be the timeout
value, not some default value, only the bcm63xx driver doesn't
seem to use it properly. I think REG_TIMEOUT or similar would
be a much better name.
I used name used in Broadcom's SDK (and as I guess also in their
documentation too).
Take a look at this BCM60333 example:
typedef struct Timer {
uint32 TimerInts; /* 0x00 */
uint32 TimerCtl0; /* 0x04 */
uint32 TimerCtl1; /* 0x08 */
uint32 TimerCtl2; /* 0x0c */
uint32 TimerCnt0; /* 0x10 */
uint32 TimerCnt1; /* 0x14 */
uint32 TimerCnt2; /* 0x18 */
uint32 WatchDogDefCount; /* 0x1c */
uint32 WatchDogCtl; /* 0x20 */
uint32 WDResetCount; /* 0x24 */
} Timer;
I got impression that Linux driver registers names usually follow what
is used in hardware documentation.
