14 Aug
2010
14 Aug
'10
10:48 p.m.
On Sat, Aug 14, 2010 at 3:40 PM, Reinhard Meyer wrote:
Dear Mike Frysinger,
On Sat, Aug 14, 2010 at 3:30 PM, Reinhard Meyer wrote:
#define DBU_ADDR 0xsomething (in a SoC header file)
dbu_t *dbu = (dbu_t *)DBU_ADDR; (in a function)
needs to be volatile ...
Why? The elements are used as parameters to readl/writel functions: status = readl(&dbu->sr);
if you use accessor functions and those guarantee volatility, then you dont need the markings on the pointer
I am quite sure we are NOT supposed to directly access hardware: status = dbu->sr;
it depends on the hardware -mike