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soc: imx95: a55: initialize lpuart clock

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Initialize lpuart clock to avoid it is not initialized.

Signed-off-by: Jiafei Pan <Jiafei.Pan@nxp.com>
This commit is contained in:
Jiafei Pan 2025-03-03 11:04:04 +08:00 • committed by Benjamin Cabé
commit 108615c560
2 changed files with 70 additions and 0 deletions
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1
soc/nxp/imx/imx9/imx95/a55/CMakeLists.txt
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@ -2,4 +2,5 @@
zephyr_include_directories(.)
zephyr_sources_ifdef(CONFIG_ARM_MMU mmu_regions.c)
zephyr_sources_ifdef(CONFIG_ARM_MMU soc.c)
set(SOC_LINKER_SCRIPT ${ZEPHYR_BASE}/include/zephyr/arch/arm64/scripts/linker.ld CACHE INTERNAL "")

69
soc/nxp/imx/imx9/imx95/a55/soc.c Normal file
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@ -0,0 +1,69 @@
/*
* Copyright 2025 NXP
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <stdio.h>
#include <zephyr/init.h>
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <zephyr/drivers/firmware/scmi/clk.h>
#include <zephyr/dt-bindings/clock/imx95_clock.h>
#include <soc.h>
#define FREQ_24M_HZ 24000000 /* 24 MHz */
static int soc_clk_init(void)
{
#if DT_NODE_HAS_STATUS(DT_NODELABEL(lpuart1), okay) || \
DT_NODE_HAS_STATUS(DT_NODELABEL(lpuart3), okay)
const struct device *clk_dev = DEVICE_DT_GET(DT_NODELABEL(scmi_clk));
struct scmi_protocol *proto = clk_dev->data;
struct scmi_clock_rate_config clk_cfg = {0};
uint32_t clk_id;
struct scmi_clock_config cfg;
int ret;
#if DT_NODE_HAS_STATUS(DT_NODELABEL(lpuart1), okay)
clk_id = IMX95_CLK_LPUART1;
#elif DT_NODE_HAS_STATUS(DT_NODELABEL(lpuart3), okay)
clk_id = IMX95_CLK_LPUART3;
#endif
ret = scmi_clock_parent_set(proto, clk_id, IMX95_CLK_24M);
if (ret) {
return ret;
}
cfg.attributes = SCMI_CLK_CONFIG_ENABLE_DISABLE(true);
cfg.clk_id = clk_id;
ret = scmi_clock_config_set(proto, &cfg);
if (ret) {
return ret;
}
clk_cfg.flags = SCMI_CLK_RATE_SET_FLAGS_ROUNDS_AUTO;
clk_cfg.clk_id = clk_id;
clk_cfg.rate[0] = FREQ_24M_HZ; /* 24 MHz*/
clk_cfg.rate[1] = 0;
ret = scmi_clock_rate_set(proto, &clk_cfg);
if (ret) {
return ret;
}
#endif
return 0;
}
static int soc_init(void)
{
return soc_clk_init();
}
/*
* Because platform is using ARM SCMI, drivers like scmi, mbox etc are
* initialized during PRE_KERNEL_1, so common init hooks can't be used, SoC
* early init and board early init should run during PRE_KERNEL_2 instead.
*/
SYS_INIT(soc_init, PRE_KERNEL_2, 0);