u-boot/arch/arm/mach-socfpga/clock_manager.c
Ley Foon Tan 508791a035 arm: socfpga: stratix10: Add clock manager driver for Stratix10 SoC
Add Clock Manager driver support for Stratix SoC

Signed-off-by: Chin Liang See <chin.liang.see@intel.com>
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
2018-05-18 10:30:47 +02:00

73 lines
1.5 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2013-2017 Altera Corporation <www.altera.com>
*/
#include <common.h>
#include <wait_bit.h>
#include <asm/io.h>
#include <asm/arch/clock_manager.h>
DECLARE_GLOBAL_DATA_PTR;
static const struct socfpga_clock_manager *clock_manager_base =
(struct socfpga_clock_manager *)SOCFPGA_CLKMGR_ADDRESS;
void cm_wait_for_lock(u32 mask)
{
u32 inter_val;
u32 retry = 0;
do {
#if defined(CONFIG_TARGET_SOCFPGA_GEN5)
inter_val = readl(&clock_manager_base->inter) & mask;
#else
inter_val = readl(&clock_manager_base->stat) & mask;
#endif
/* Wait for stable lock */
if (inter_val == mask)
retry++;
else
retry = 0;
if (retry >= 10)
break;
} while (1);
}
/* function to poll in the fsm busy bit */
int cm_wait_for_fsm(void)
{
return wait_for_bit_le32(&clock_manager_base->stat,
CLKMGR_STAT_BUSY, false, 20000, false);
}
int set_cpu_clk_info(void)
{
/* Calculate the clock frequencies required for drivers */
cm_get_l4_sp_clk_hz();
cm_get_mmc_controller_clk_hz();
gd->bd->bi_arm_freq = cm_get_mpu_clk_hz() / 1000000;
gd->bd->bi_dsp_freq = 0;
#if defined(CONFIG_TARGET_SOCFPGA_GEN5)
gd->bd->bi_ddr_freq = cm_get_sdram_clk_hz() / 1000000;
#else
gd->bd->bi_ddr_freq = 0;
#endif
return 0;
}
#ifndef CONFIG_SPL_BUILD
static int do_showclocks(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
cm_print_clock_quick_summary();
return 0;
}
U_BOOT_CMD(
clocks, CONFIG_SYS_MAXARGS, 1, do_showclocks,
"display clocks",
""
);
#endif