From 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 22 Oct 2024 10:36:11 +0000
Subject: [PATCH] 修改4g拨号为QMI,需要在系统里后台执行quectel-CM
---
kernel/drivers/clk/imx/clk.c | 125 +++++++++++++++++++++++++++++++++++++----
1 files changed, 112 insertions(+), 13 deletions(-)
diff --git a/kernel/drivers/clk/imx/clk.c b/kernel/drivers/clk/imx/clk.c
index 9074e69..d4cf0c7 100644
--- a/kernel/drivers/clk/imx/clk.c
+++ b/kernel/drivers/clk/imx/clk.c
@@ -1,14 +1,50 @@
// SPDX-License-Identifier: GPL-2.0
+#include <linux/bits.h>
#include <linux/clk.h>
+#include <linux/clk-provider.h>
#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include "clk.h"
-DEFINE_SPINLOCK(imx_ccm_lock);
+#define CCM_CCDR 0x4
+#define CCDR_MMDC_CH0_MASK BIT(17)
+#define CCDR_MMDC_CH1_MASK BIT(16)
-void __init imx_check_clocks(struct clk *clks[], unsigned int count)
+DEFINE_SPINLOCK(imx_ccm_lock);
+EXPORT_SYMBOL_GPL(imx_ccm_lock);
+
+void imx_unregister_clocks(struct clk *clks[], unsigned int count)
+{
+ unsigned int i;
+
+ for (i = 0; i < count; i++)
+ clk_unregister(clks[i]);
+}
+
+void imx_unregister_hw_clocks(struct clk_hw *hws[], unsigned int count)
+{
+ unsigned int i;
+
+ for (i = 0; i < count; i++)
+ clk_hw_unregister(hws[i]);
+}
+EXPORT_SYMBOL_GPL(imx_unregister_hw_clocks);
+
+void imx_mmdc_mask_handshake(void __iomem *ccm_base,
+ unsigned int chn)
+{
+ unsigned int reg;
+
+ reg = readl_relaxed(ccm_base + CCM_CCDR);
+ reg |= chn == 0 ? CCDR_MMDC_CH0_MASK : CCDR_MMDC_CH1_MASK;
+ writel_relaxed(reg, ccm_base + CCM_CCDR);
+}
+
+void imx_check_clocks(struct clk *clks[], unsigned int count)
{
unsigned i;
@@ -18,7 +54,18 @@
i, PTR_ERR(clks[i]));
}
-static struct clk * __init imx_obtain_fixed_clock_from_dt(const char *name)
+void imx_check_clk_hws(struct clk_hw *clks[], unsigned int count)
+{
+ unsigned int i;
+
+ for (i = 0; i < count; i++)
+ if (IS_ERR(clks[i]))
+ pr_err("i.MX clk %u: register failed with %ld\n",
+ i, PTR_ERR(clks[i]));
+}
+EXPORT_SYMBOL_GPL(imx_check_clk_hws);
+
+static struct clk *imx_obtain_fixed_clock_from_dt(const char *name)
{
struct of_phandle_args phandle;
struct clk *clk = ERR_PTR(-ENODEV);
@@ -38,7 +85,7 @@
return clk;
}
-struct clk * __init imx_obtain_fixed_clock(
+struct clk *imx_obtain_fixed_clock(
const char *name, unsigned long rate)
{
struct clk *clk;
@@ -48,6 +95,30 @@
clk = imx_clk_fixed(name, rate);
return clk;
}
+
+struct clk_hw *imx_obtain_fixed_clock_hw(
+ const char *name, unsigned long rate)
+{
+ struct clk *clk;
+
+ clk = imx_obtain_fixed_clock_from_dt(name);
+ if (IS_ERR(clk))
+ clk = imx_clk_fixed(name, rate);
+ return __clk_get_hw(clk);
+}
+
+struct clk_hw * imx_obtain_fixed_clk_hw(struct device_node *np,
+ const char *name)
+{
+ struct clk *clk;
+
+ clk = of_clk_get_by_name(np, name);
+ if (IS_ERR(clk))
+ return ERR_PTR(-ENOENT);
+
+ return __clk_get_hw(clk);
+}
+EXPORT_SYMBOL_GPL(imx_obtain_fixed_clk_hw);
/*
* This fixups the register CCM_CSCMR1 write value.
@@ -75,8 +146,11 @@
return;
}
-static int imx_keep_uart_clocks __initdata;
-static struct clk ** const *imx_uart_clocks __initdata;
+#ifndef MODULE
+
+static bool imx_keep_uart_clocks;
+static int imx_enabled_uart_clocks;
+static struct clk **imx_uart_clocks;
static int __init imx_keep_uart_clocks_param(char *str)
{
@@ -89,26 +163,51 @@
__setup_param("earlyprintk", imx_keep_uart_earlyprintk,
imx_keep_uart_clocks_param, 0);
-void __init imx_register_uart_clocks(struct clk ** const clks[])
+void imx_register_uart_clocks(unsigned int clk_count)
{
+ imx_enabled_uart_clocks = 0;
+
+/* i.MX boards use device trees now. For build tests without CONFIG_OF, do nothing */
+#ifdef CONFIG_OF
if (imx_keep_uart_clocks) {
int i;
- imx_uart_clocks = clks;
- for (i = 0; imx_uart_clocks[i]; i++)
- clk_prepare_enable(*imx_uart_clocks[i]);
+ imx_uart_clocks = kcalloc(clk_count, sizeof(struct clk *), GFP_KERNEL);
+
+ if (!of_stdout)
+ return;
+
+ for (i = 0; i < clk_count; i++) {
+ imx_uart_clocks[imx_enabled_uart_clocks] = of_clk_get(of_stdout, i);
+
+ /* Stop if there are no more of_stdout references */
+ if (IS_ERR(imx_uart_clocks[imx_enabled_uart_clocks]))
+ return;
+
+ /* Only enable the clock if it's not NULL */
+ if (imx_uart_clocks[imx_enabled_uart_clocks])
+ clk_prepare_enable(imx_uart_clocks[imx_enabled_uart_clocks++]);
+ }
}
+#endif
}
static int __init imx_clk_disable_uart(void)
{
- if (imx_keep_uart_clocks && imx_uart_clocks) {
+ if (imx_keep_uart_clocks && imx_enabled_uart_clocks) {
int i;
- for (i = 0; imx_uart_clocks[i]; i++)
- clk_disable_unprepare(*imx_uart_clocks[i]);
+ for (i = 0; i < imx_enabled_uart_clocks; i++) {
+ clk_disable_unprepare(imx_uart_clocks[i]);
+ clk_put(imx_uart_clocks[i]);
+ }
}
+
+ kfree(imx_uart_clocks);
return 0;
}
late_initcall_sync(imx_clk_disable_uart);
+#endif
+
+MODULE_LICENSE("GPL v2");
--
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