On 2/11/23 18:11, Andrew Lunn wrote:
+
+#define JH7100_SYSMAIN_REGISTER28 0x70
+/* The value below is not a typo, just really bad naming by StarFive ¯\_(ツ)_/¯ */
+#define JH7100_SYSMAIN_REGISTER49 0xc8
Seems like the comment should be one line earlier?
There is value in basing the names on the datasheet, but you could
append something meaningful on the end:
#define JH7100_SYSMAIN_REGISTER49_DLYCHAIN 0xc8
???
Unfortunately the JH7100 datasheet I have access to doesn't provide any
information regarding the SYSCTRL-MAINSYS related registers. Maybe Emil
could provide some details here?
+ if (!of_property_read_u32(np, "starfive,gtxclk-dlychain", >xclk_dlychain)) {
+ ret = regmap_write(sysmain, JH7100_SYSMAIN_REGISTER49, gtxclk_dlychain);
+ if (ret)
+ return dev_err_probe(dev, ret, "error selecting gtxclk delay chain\n");
+ }
You should probably document that if starfive,gtxclk-dlychain is not
found in the DT blob, the value for the delay chain is undefined. It
would actually be better to define it, set it to 0 for example. That
way, you know you don't have any dependency on the bootloader for
example.
Sure, I will set it to 0.
Andrew
Thanks for reviewing,
Cristian
