Author: jhibbits
Date: Wed Jun 14 04:26:37 2017
New Revision: 319936
URL: https://svnweb.freebsd.org/changeset/base/319936
Log:
Actually add the mpc85xx_get_platform_clock() function.
Follow up r319935 by actually committing the mpc85xx_get_platform_clock()
function. This function was created to facilitate other development, and I
thought I had committed it earlier.
Some blocks depend on the platform clock rather than the system clock.
The System clock is derived from the platform clock as one-half the
platform clock. Rewrite mpc85xx_get_system_clock() to use the new
function.
Pointy-hat to: jhibbits
Modified:
head/sys/powerpc/mpc85xx/mpc85xx.c
head/sys/powerpc/mpc85xx/mpc85xx.h
Modified: head/sys/powerpc/mpc85xx/mpc85xx.c
==============================================================================
--- head/sys/powerpc/mpc85xx/mpc85xx.c Wed Jun 14 04:16:37 2017
(r319935)
+++ head/sys/powerpc/mpc85xx/mpc85xx.c Wed Jun 14 04:26:37 2017
(r319936)
@@ -438,16 +438,28 @@ err:
}
uint32_t
-mpc85xx_get_system_clock(void)
+mpc85xx_get_platform_clock(void)
{
phandle_t soc;
- uint32_t freq;
+ static uint32_t freq;
+ if (freq != 0)
+ return (freq);
+
soc = OF_finddevice("/soc");
- freq = 0;
/* freq isn't modified on error. */
OF_getencprop(soc, "bus-frequency", (void *)&freq, sizeof(freq));
+
+ return (freq);
+}
+
+uint32_t
+mpc85xx_get_system_clock(void)
+{
+ uint32_t freq;
+
+ freq = mpc85xx_get_platform_clock();
return (freq / 2);
}
Modified: head/sys/powerpc/mpc85xx/mpc85xx.h
==============================================================================
--- head/sys/powerpc/mpc85xx/mpc85xx.h Wed Jun 14 04:16:37 2017
(r319935)
+++ head/sys/powerpc/mpc85xx/mpc85xx.h Wed Jun 14 04:26:37 2017
(r319936)
@@ -171,6 +171,7 @@ void mpc85xx_enable_l3_cache(void);
void mpc85xx_fix_errata(vm_offset_t);
void dataloss_erratum_access(vm_offset_t, uint32_t);
int mpc85xx_is_qoriq(void);
+uint32_t mpc85xx_get_platform_clock(void);
uint32_t mpc85xx_get_system_clock(void);
#endif /* _MPC85XX_H_ */
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