touch_read() had two branches that both called getPoint() unconditionally
— the touch_data_ready flag served no purpose. Gate the I2C transaction
on the flag so the ISR finally pulls its weight: idle loops no longer
hit I2C, getPoint() runs only when the CST9220 actually raised the
TP_INT line.
Also scope touch_pressed/x/y to file-static (no cross-TU users) and
drop the stale 'permanent while we work on it' comment by the default
boot screen — splash-on-boot is documented in CLAUDE.md.
Hermann Björgvin Haraldsson
d8592f7a03