first

rt-thread/components/drivers/clk/Kconfig

@@ -0,0 +1,5 @@
+menuconfig RT_USING_CLK
+    bool "Using Common Clock Framework (CLK)"
+    depends on RT_USING_DM
+    select RT_USING_ADT_REF
+    default y

rt-thread/components/drivers/clk/SConscript

@@ -0,0 +1,26 @@
+from building import *
+
+group = []
+objs = []
+
+if not GetDepend(['RT_USING_CLK']):
+    Return('group')
+
+cwd = GetCurrentDir()
+list = os.listdir(cwd)
+CPPPATH = [cwd + '/../include']
+
+src = ['clk.c']
+
+if GetDepend(['RT_USING_OFW']):
+    src += ['clk-fixed-rate.c']
+
+group = DefineGroup('DeviceDrivers', src, depend = [''], CPPPATH = CPPPATH)
+
+for d in list:
+    path = os.path.join(cwd, d)
+    if os.path.isfile(os.path.join(path, 'SConscript')):
+        objs = objs + SConscript(os.path.join(d, 'SConscript'))
+objs = objs + group
+
+Return('objs')

rt-thread/components/drivers/clk/clk-fixed-rate.c

@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-11-26     GuEe-GUI     first version
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#include <drivers/platform.h>
+
+static rt_err_t fixed_clk_ofw_init(struct rt_platform_device *pdev, struct rt_clk_fixed_rate *clk_fixed)
+{
+    rt_err_t err = RT_EOK;
+    rt_uint32_t rate, accuracy;
+    struct rt_ofw_node *np = pdev->parent.ofw_node;
+    const char *clk_name = np->name;
+
+    if (!rt_ofw_prop_read_u32(np, "clock-frequency", &rate))
+    {
+        rt_ofw_prop_read_u32(np, "clock-accuracy", &accuracy);
+        rt_ofw_prop_read_string(np, "clock-output-names", &clk_name);
+
+        clk_fixed->clk.name = clk_name;
+        clk_fixed->clk.rate = rate;
+        clk_fixed->clk.min_rate = rate;
+        clk_fixed->clk.max_rate = rate;
+        clk_fixed->fixed_rate = rate;
+        clk_fixed->fixed_accuracy = accuracy;
+
+        rt_ofw_data(np) = &clk_fixed->clk;
+    }
+    else
+    {
+        err = -RT_EIO;
+    }
+
+    return err;
+}
+
+static rt_err_t fixed_clk_probe(struct rt_platform_device *pdev)
+{
+    rt_err_t err = RT_EOK;
+    struct rt_clk_fixed_rate *clk_fixed = rt_calloc(1, sizeof(*clk_fixed));
+
+    if (clk_fixed)
+    {
+        err = fixed_clk_ofw_init(pdev, clk_fixed);
+    }
+    else
+    {
+        err = -RT_ENOMEM;
+    }
+
+    if (!err)
+    {
+        err = rt_clk_register(&clk_fixed->clk, RT_NULL);
+    }
+
+    if (err && clk_fixed)
+    {
+        rt_free(clk_fixed);
+    }
+
+    return err;
+}
+
+static const struct rt_ofw_node_id fixed_clk_ofw_ids[] =
+{
+    { .compatible = "fixed-clock" },
+    { /* sentinel */ }
+};
+
+static struct rt_platform_driver fixed_clk_driver =
+{
+    .name = "clk-fixed-rate",
+    .ids = fixed_clk_ofw_ids,
+
+    .probe = fixed_clk_probe,
+};
+
+static int fixed_clk_drv_register(void)
+{
+    rt_platform_driver_register(&fixed_clk_driver);
+
+    return 0;
+}
+INIT_SUBSYS_EXPORT(fixed_clk_drv_register);