ipq40xx: remove support for kernel 4.19

The target uses 5.4 as default kernel since 03/2020.

Kernel 4.19 support is not really maintained anymore, it does not
seem to be needed, and removing it will make upcoming driver
updates easier. Thus, remove it.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

1 files changed, 0 insertions, 115 deletions

diff --git a/target/linux/ipq40xx/patches-4.19/081-clk-fix-apss-cpu-overclocking.patch b/target/linux/ipq40xx/patches-4.19/081-clk-fix-apss-cpu-overclocking.patch
deleted file mode 100644
index de99792541..0000000000
--- a/target/linux/ipq40xx/patches-4.19/081-clk-fix-apss-cpu-overclocking.patch
+++ /dev/null
@@ -1,115 +0,0 @@
-From f2b87dc1028b710ec8ce25808b9d21f92b376184 Mon Sep 17 00:00:00 2001
-From: Christian Lamparter <chunkeey@googlemail.com>
-Date: Sun, 11 Mar 2018 14:41:31 +0100
-Subject: [PATCH 2/2] clk: fix apss cpu overclocking
-
-There's an interaction issue between the clk changes:"
-clk: qcom: ipq4019: Add the apss cpu pll divider clock node
-clk: qcom: ipq4019: remove fixed clocks and add pll clocks
-" and the cpufreq-dt.
-
-cpufreq-dt is now spamming the kernel-log with the following:
-
-[ 1099.190658] cpu cpu0: dev_pm_opp_set_rate: failed to find current OPP
-for freq 761142857 (-34)
-
-This only happens on certain devices like the Compex WPJ428
-and AVM FritzBox!4040. However, other devices like the Asus
-RT-AC58U and Meraki MR33 work just fine.
-
-The issue stem from the fact that all higher CPU-Clocks
-are achieved by switching the clock-parent to the P_DDRPLLAPSS
-(ddrpllapss). Which is set by Qualcomm's proprietary bootcode
-as part of the DDR calibration.
-
-For example, the FB4040 uses 256 MiB Nanya NT5CC128M16IP clocked
-at round 533 MHz (ddrpllsdcc = 190285714 Hz).
-
-whereas the 128 MiB Nanya NT5CC64M16GP-DI in the ASUS RT-AC58U is
-clocked at a slightly higher 537 MHz ( ddrpllsdcc = 192000000 Hz).
-
-This patch attempts to fix the issue by modifying
-clk_cpu_div_round_rate(), clk_cpu_div_set_rate(), clk_cpu_div_recalc_rate()
-to use a new qcom_find_freq_close() function, which returns the closest
-matching frequency, instead of the next higher. This way, the SoC in
-the FB4040 (with its max clock speed of 710.4 MHz) will no longer
-try to overclock to 761 MHz.
-
-Fixes: d83dcacea18 ("clk: qcom: ipq4019: Add the apss cpu pll divider clock node")
-Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
-Signed-off-by: John Crispin <john@phrozen.org>
----
- drivers/clk/qcom/gcc-ipq4019.c | 34 +++++++++++++++++++++++++++++++---
- 1 file changed, 31 insertions(+), 3 deletions(-)
-
---- a/drivers/clk/qcom/gcc-ipq4019.c
-+++ b/drivers/clk/qcom/gcc-ipq4019.c
-@@ -1251,6 +1251,29 @@ static const struct clk_fepll_vco gcc_fe
- 	.reg = 0x2f020,
- };
- 
-+
-+const struct freq_tbl *qcom_find_freq_close(const struct freq_tbl *f,
-+					     unsigned long rate)
-+{
-+	const struct freq_tbl *last = NULL;
-+
-+	for ( ; f->freq; f++) {
-+		if (rate == f->freq)
-+			return f;
-+
-+		if (f->freq > rate) {
-+			if (!last ||
-+			   (f->freq - rate) < (rate - last->freq))
-+				return f;
-+			else
-+				return last;
-+		}
-+		last = f;
-+	}
-+
-+	return last;
-+}
-+
- /*
-  * Round rate function for APSS CPU PLL Clock divider.
-  * It looks up the frequency table and returns the next higher frequency
-@@ -1263,7 +1286,7 @@ static long clk_cpu_div_round_rate(struc
- 	struct clk_hw *p_hw;
- 	const struct freq_tbl *f;
- 
--	f = qcom_find_freq(pll->freq_tbl, rate);
-+	f = qcom_find_freq_close(pll->freq_tbl, rate);
- 	if (!f)
- 		return -EINVAL;
- 
-@@ -1286,7 +1309,7 @@ static int clk_cpu_div_set_rate(struct c
- 	u32 mask;
- 	int ret;
- 
--	f = qcom_find_freq(pll->freq_tbl, rate);
-+	f = qcom_find_freq_close(pll->freq_tbl, rate);
- 	if (!f)
- 		return -EINVAL;
- 
-@@ -1313,6 +1336,7 @@ static unsigned long
- clk_cpu_div_recalc_rate(struct clk_hw *hw,
- 			unsigned long parent_rate)
- {
-+	const struct freq_tbl *f;
- 	struct clk_fepll *pll = to_clk_fepll(hw);
- 	u32 cdiv, pre_div;
- 	u64 rate;
-@@ -1333,7 +1357,11 @@ clk_cpu_div_recalc_rate(struct clk_hw *h
- 	rate = clk_fepll_vco_calc_rate(pll, parent_rate) * 2;
- 	do_div(rate, pre_div);
- 
--	return rate;
-+	f = qcom_find_freq_close(pll->freq_tbl, rate);
-+	if (!f)
-+		return rate;
-+
-+	return f->freq;
- };
- 
- static const struct clk_ops clk_regmap_cpu_div_ops = {