ipq40xx: Add patches for 4.19

This adds the necessary patches for 4.19 kernel.
Upstreamed patches were dropped, backported upstreamed patches
from 4.20.
Drop Winbond ID patch since that NAND IC was upstreamed to use
SPI-NAND framework and support for it was backported from 4.20.
Rework ESSEDMA patches to compile under 4.19 due to timer changes,
Clément Péron did the hard work and his changes were taken from the
initial 4.19 PR.
MR33 changes had to be manually refreshed to apply.
Refresh other patches to apply.

Signed-off-by: Robert Marko <robimarko@gmail.com>
Remove

1 files changed, 115 insertions, 0 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
new file mode 100644
index 0000000000..de99792541
--- /dev/null
+++ b/target/linux/ipq40xx/patches-4.19/081-clk-fix-apss-cpu-overclocking.patch
@@ -0,0 +1,115 @@
+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 = {