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hpmicro: hpm6750: keep cpu clock on after "wfi", so that mchtmr can work after "wfi"

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- keep cpu clock on after "wfi", so that mchtmr can still work after "wfi"

Signed-off-by: Zhihong Chen <zhihong.chen@hpmicro.com>
This commit is contained in:
Zhihong Chen
2023-07-20 13:28:46 +08:00
committed by Xiang Xiao
parent 99c29bda70
commit 0fab64cd95
2 changed files with 23 additions and 0 deletions
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arch/risc-v/src/hpm6750/hardware/hpm6750_sysctl.h
+14
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@@ -29,6 +29,7 @@
#define HPM6750_SYSCTL_GROUP0_1 (HPM6750_SYSCTL_BASE + 0x000810)
#define HPM6750_SYSCTL_GROUP0_2 (HPM6750_SYSCTL_BASE + 0x000820)
#define HPM6750_SYSCTL_CLOCK_NODE (HPM6750_SYSCTL_BASE + 0x001800)
#define HPM6750_SYSCTL_CPU0_LP (HPM6750_SYSCTL_BASE + 0x002800)
#define HPM6750_SYSCTL_GROUPx_0_AHB (1 << 0)
#define HPM6750_SYSCTL_GROUPx_0_AXI (1 << 1)
@@ -166,4 +167,17 @@
#define SYSCTL_CLOCK_DIV_SET(x) (((uint32_t)(x) << SYSCTL_CLOCK_DIV_SHIFT) & SYSCTL_CLOCK_DIV_MASK)
#define SYSCTL_CLOCK_DIV_GET(x) (((uint32_t)(x) & SYSCTL_CLOCK_DIV_MASK) >> SYSCTL_CLOCK_DIV_SHIFT)
/* MODE (RW)
*
* Low power mode, system behavior after WFI
* 00: CPU clock stop after WFI
* 01: System enter low power mode after WFI
* 10: Keep running after WFI
* 11: reserved
*/
#define SYSCTL_CPU_LP_MODE_MASK (0x3U)
#define SYSCTL_CPU_LP_MODE_SHIFT (0U)
#define SYSCTL_CPU_LP_MODE_SET(x) (((uint32_t)(x) << SYSCTL_CPU_LP_MODE_SHIFT) & SYSCTL_CPU_LP_MODE_MASK)
#define SYSCTL_CPU_LP_MODE_GET(x) (((uint32_t)(x) & SYSCTL_CPU_LP_MODE_MASK) >> SYSCTL_CPU_LP_MODE_SHIFT)
#endif /* __ARCH_RISCV_SRC_HPM6750_HARDWARE_HPM6750_SYSCTL_H */
arch/risc-v/src/hpm6750/hpm6750_clockconfig.c
+9
View File
@@ -82,10 +82,19 @@ static void hpm6750_sysctl_config_clock(clock_node_t node_index,
void hpm6750_clockconfig(void)
{
/* Keep cpu clock on after "wfi", so that mchtmr can work after "wfi" */
modifyreg32(HPM6750_SYSCTL_CPU0_LP, SYSCTL_CPU_LP_MODE_MASK,
SYSCTL_CPU_LP_MODE_SET(2));
/* Add all clocks to group0 */
putreg32(0xffffffffu, HPM6750_SYSCTL_GROUP0_0);
putreg32(0xffffffffu, HPM6750_SYSCTL_GROUP0_1);
putreg32(0xffffffffu, HPM6750_SYSCTL_GROUP0_2);
/* Set clock source */
hpm6750_sysctl_config_clock(clock_node_cpu0, clock_source_pll0_clk0, 1);
hpm6750_sysctl_config_clock(clock_node_mchtmr0, clock_source_osc0_clk0, 1);
hpm6750_sysctl_config_clock(clock_node_uart0, clock_source_osc0_clk0, 1);