From 9d77db3c730780c8ef5ccd4b66403ff5675cfe4e Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 13 May 2024 10:30:14 +0000
Subject: [PATCH] modify sin led gpio
---
kernel/arch/x86/kernel/apb_timer.c | 61 +-----------------------------
1 files changed, 2 insertions(+), 59 deletions(-)
diff --git a/kernel/arch/x86/kernel/apb_timer.c b/kernel/arch/x86/kernel/apb_timer.c
index 65721dc..263eead 100644
--- a/kernel/arch/x86/kernel/apb_timer.c
+++ b/kernel/arch/x86/kernel/apb_timer.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* apb_timer.c: Driver for Langwell APB timers
*
* (C) Copyright 2009 Intel Corporation
* Author: Jacob Pan (jacob.jun.pan@intel.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; version 2
- * of the License.
*
* Note:
* Langwell is the south complex of Intel Moorestown MID platform. There are
@@ -99,7 +95,7 @@
printk(KERN_WARNING "No timer base from SFI, use default\n");
apbt_address = APBT_DEFAULT_BASE;
}
- apbt_virt_address = ioremap_nocache(apbt_address, APBT_MMAP_SIZE);
+ apbt_virt_address = ioremap(apbt_address, APBT_MMAP_SIZE);
if (!apbt_virt_address) {
pr_debug("Failed mapping APBT phy address at %lu\n",\
(unsigned long)apbt_address);
@@ -348,57 +344,4 @@
apbt_clear_mapping();
apb_timer_block_enabled = 0;
panic("failed to enable APB timer\n");
-}
-
-/* called before apb_timer_enable, use early map */
-unsigned long apbt_quick_calibrate(void)
-{
- int i, scale;
- u64 old, new;
- u64 t1, t2;
- unsigned long khz = 0;
- u32 loop, shift;
-
- apbt_set_mapping();
- dw_apb_clocksource_start(clocksource_apbt);
-
- /* check if the timer can count down, otherwise return */
- old = dw_apb_clocksource_read(clocksource_apbt);
- i = 10000;
- while (--i) {
- if (old != dw_apb_clocksource_read(clocksource_apbt))
- break;
- }
- if (!i)
- goto failed;
-
- /* count 16 ms */
- loop = (apbt_freq / 1000) << 4;
-
- /* restart the timer to ensure it won't get to 0 in the calibration */
- dw_apb_clocksource_start(clocksource_apbt);
-
- old = dw_apb_clocksource_read(clocksource_apbt);
- old += loop;
-
- t1 = rdtsc();
-
- do {
- new = dw_apb_clocksource_read(clocksource_apbt);
- } while (new < old);
-
- t2 = rdtsc();
-
- shift = 5;
- if (unlikely(loop >> shift == 0)) {
- printk(KERN_INFO
- "APBT TSC calibration failed, not enough resolution\n");
- return 0;
- }
- scale = (int)div_u64((t2 - t1), loop >> shift);
- khz = (scale * (apbt_freq / 1000)) >> shift;
- printk(KERN_INFO "TSC freq calculated by APB timer is %lu khz\n", khz);
- return khz;
-failed:
- return 0;
}
--
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