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lib: utils/timer: Add Andes fdt timer support

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Since we can get the PLMT base address and timer frequency from
device tree, move plmt timer device to fdt timer framework.

dts example (Quad-core AX45MP):

  cpus {
      ...
      timebase-frequency = <0x3938700>;
      ...
  }
  soc {
      ...
      plmt0@e6000000 {
          compatible = "andestech,plmt0";
          reg = <0x00 0xe6000000 0x00 0x100000>;
          interrupts-extended = <&cpu0_intc 0x07
                                 &cpu1_intc 0x07
                                 &cpu2_intc 0x07
                                 &cpu3_intc 0x07>;
      };
      ...
  }

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Yu Chien Peter Lin
2022-10-14 08:32:46 +08:00
committed by Anup Patel
parent 88f58a3694
commit ef9f02e7fb
13 changed files with 259 additions and 144 deletions
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3
include/sbi_utils/fdt/fdt_helper.h
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@@ -95,6 +95,9 @@ int fdt_parse_aclint_node(void *fdt, int nodeoffset, bool for_timer,
unsigned long *out_addr2, unsigned long *out_size2,
u32 *out_first_hartid, u32 *out_hart_count);
int fdt_parse_plmt_node(void *fdt, int nodeoffset, unsigned long *plmt_base,
unsigned long *plmt_size, u32 *hart_count);
int fdt_parse_compat_addr(void *fdt, uint64_t *addr,
const char *compatible);

29
include/sbi_utils/timer/andes_plmt.h Normal file
View File

@@ -0,0 +1,29 @@
/*
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2022 Andes Technology Corporation
*
* Authors:
* Zong Li <zong@andestech.com>
* Nylon Chen <nylon7@andestech.com>
* Yu Chien Peter Lin <peterlin@andestech.com>
*/
#ifndef __TIMER_ANDES_PLMT_H__
#define __TIMER_ANDES_PLMT_H__
#define DEFAULT_AE350_PLMT_FREQ 60000000
#define PLMT_REGION_ALIGN 0x1000
struct plmt_data {
u32 hart_count;
unsigned long size;
unsigned long timer_freq;
volatile u64 *time_val;
volatile u64 *time_cmp;
};
int plmt_cold_timer_init(struct plmt_data *plmt);
int plmt_warm_timer_init(void);
#endif /* __TIMER_ANDES_PLMT_H__ */