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clock_control: Add support for getting LPO frequency in mcux sim driver

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The mcux sim clock control driver was originally designed to pass
through the clock subsystem value from dts to the mcux CLOCK_GetFreq()
function. This assumed that the values in
include/dt-bindings/clock/kinetis_sim.h matched the enumeration in
fsl_clock.h, which is true for the coresys, platform, and bus clocks.
However, the low-power oscillator (LPO) clock has a different values in
k64 vs. kw2xd, therefore we must update the clock_control driver to
parse the value from dts and convert it to the fsl_clock.h enumeration.

Signed-off-by: Maureen Helm <maureen.helm@nxp.com>
This commit is contained in:
Maureen Helm 2018-04-23 14:27:43 -05:00
commit 39d63d316b
2 changed files with 12 additions and 1 deletions
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12
drivers/clock_control/clock_control_mcux_sim.c
View file

@ -6,6 +6,7 @@
#include <errno.h> #include <errno.h>
#include <soc.h> #include <soc.h>
#include <clock_control.h> #include <clock_control.h>
#include <dt-bindings/clock/kinetis_sim.h>
#include <fsl_clock.h> #include <fsl_clock.h>
#define SYS_LOG_LEVEL CONFIG_SYS_LOG_CLOCK_CONTROL_LEVEL #define SYS_LOG_LEVEL CONFIG_SYS_LOG_CLOCK_CONTROL_LEVEL
@ -25,7 +26,16 @@ static int mcux_sim_get_subsys_rate(struct device *dev,
clock_control_subsys_t sub_system, clock_control_subsys_t sub_system,
u32_t *rate) u32_t *rate)
{ {
clock_name_t clock_name = (clock_name_t) sub_system; clock_name_t clock_name;
switch ((u32_t) sub_system) {
case KINETIS_SIM_LPO_CLK:
clock_name = kCLOCK_LpoClk;
break;
default:
clock_name = (clock_name_t) sub_system;
break;
}
*rate = CLOCK_GetFreq(clock_name); *rate = CLOCK_GetFreq(clock_name);

1
include/dt-bindings/clock/kinetis_sim.h
View file

@ -10,5 +10,6 @@
#define KINETIS_SIM_CORESYS_CLK 0 #define KINETIS_SIM_CORESYS_CLK 0
#define KINETIS_SIM_PLATFORM_CLK 1 #define KINETIS_SIM_PLATFORM_CLK 1
#define KINETIS_SIM_BUS_CLK 2 #define KINETIS_SIM_BUS_CLK 2
#define KINETIS_SIM_LPO_CLK 19
#endif /* __KINETIS_SIM_H */ #endif /* __KINETIS_SIM_H */