ipq806x: remove support for kernel 4.19

The target uses 5.4 as default kernel since 04/2020.

Kernel 4.19 support is not really maintained anymore, and there has
been a lot of changes between 4.19 and 5.4 on this target. Despite,
new devices are typically added for 5.4 only anyway.

Thus, make maintaining of old stuff and reviewing of new stuff
easier by removing support for kernel 4.19.

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

1 files changed, 0 insertions, 91 deletions

diff --git a/target/linux/ipq806x/patches-4.19/0071-8-pcie-qcom-Fixed-pcie_phy_clk-branch-issue.patch b/target/linux/ipq806x/patches-4.19/0071-8-pcie-qcom-Fixed-pcie_phy_clk-branch-issue.patch
deleted file mode 100644
index 7cbeb3bed7..0000000000
--- a/target/linux/ipq806x/patches-4.19/0071-8-pcie-qcom-Fixed-pcie_phy_clk-branch-issue.patch
+++ /dev/null
@@ -1,91 +0,0 @@
-From b74bab6186131eea09459eedf5d737645a3559c9 Mon Sep 17 00:00:00 2001
-From: Abhishek Sahu <absahu@codeaurora.org>
-Date: Thu, 22 Dec 2016 11:18:45 +0530
-Subject: pcie: qcom: Fixed pcie_phy_clk branch issue
-
-Following backtraces are observed in PCIe deinit operation.
-
- Hardware name: Qualcomm (Flattened Device Tree)
- (unwind_backtrace) from [] (show_stack+0x10/0x14)
- (show_stack) from [] (dump_stack+0x84/0x98)
- (dump_stack) from [] (warn_slowpath_common+0x9c/0xb8)
- (warn_slowpath_common) from [] (warn_slowpath_fmt+0x30/0x40)
- (warn_slowpath_fmt) from [] (clk_branch_wait+0x114/0x120)
- (clk_branch_wait) from [] (clk_core_disable+0xd0/0x1f4)
- (clk_core_disable) from [] (clk_disable+0x24/0x30)
- (clk_disable) from [] (qcom_pcie_deinit_v0+0x6c/0xb8)
- (qcom_pcie_deinit_v0) from [] (qcom_pcie_host_init+0xe0/0xe8)
- (qcom_pcie_host_init) from [] (dw_pcie_host_init+0x3b0/0x538)
- (dw_pcie_host_init) from [] (qcom_pcie_probe+0x20c/0x2e4)
-
-pcie_phy_clk is generated for PCIe controller itself and the
-GCC controls its branch operation. This error is coming since
-the assert operations turn off the parent clock before branch
-clock. Now this patch moves clk_disable_unprepare before assert
-operations.
-
-Similarly, during probe function, the clock branch operation
-should be done after dessert operation. Currently, it does not
-generate any error since bootloader enables the pcie_phy_clk
-but the same error is coming during probe, if bootloader
-disables pcie_phy_clk.
-
-Change-Id: Ib29c154d10eb64363d9cc982ce5fd8107af5627d
-Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
----
- drivers/pci/host/pcie-qcom.c | 16 +++++++---------
- 1 file changed, 7 insertions(+), 9 deletions(-)
-
---- a/drivers/pci/controller/dwc/pcie-qcom.c
-+++ b/drivers/pci/controller/dwc/pcie-qcom.c
-@@ -393,6 +393,7 @@ static void qcom_pcie_deinit_2_1_0(struc
- {
- 	struct qcom_pcie_resources_2_1_0 *res = &pcie->res.v2_1_0;
- 
-+	clk_disable_unprepare(res->phy_clk);
- 	reset_control_assert(res->pci_reset);
- 	reset_control_assert(res->axi_reset);
- 	reset_control_assert(res->ahb_reset);
-@@ -401,7 +402,6 @@ static void qcom_pcie_deinit_2_1_0(struc
- 	reset_control_assert(res->ext_reset);
- 	clk_disable_unprepare(res->iface_clk);
- 	clk_disable_unprepare(res->core_clk);
--	clk_disable_unprepare(res->phy_clk);
- 	clk_disable_unprepare(res->aux_clk);
- 	clk_disable_unprepare(res->ref_clk);
- 	regulator_bulk_disable(ARRAY_SIZE(res->supplies), res->supplies);
-@@ -444,12 +444,6 @@ static int qcom_pcie_init_2_1_0(struct q
- 		goto err_clk_core;
- 	}
- 
--	ret = clk_prepare_enable(res->phy_clk);
--	if (ret) {
--		dev_err(dev, "cannot prepare/enable phy clock\n");
--		goto err_clk_phy;
--	}
--
- 	ret = clk_prepare_enable(res->aux_clk);
- 	if (ret) {
- 		dev_err(dev, "cannot prepare/enable aux clock\n");
-@@ -513,6 +507,12 @@ static int qcom_pcie_init_2_1_0(struct q
- 		return ret;
- 	}
- 
-+	ret = clk_prepare_enable(res->phy_clk);
-+	if (ret) {
-+		dev_err(dev, "cannot prepare/enable phy clock\n");
-+		goto err_deassert_ahb;
-+	}
-+
- 	/* wait for clock acquisition */
- 	usleep_range(1000, 1500);
- 	if (pcie->force_gen1) {
-@@ -538,8 +538,6 @@ err_deassert_ahb:
- err_clk_ref:
- 	clk_disable_unprepare(res->aux_clk);
- err_clk_aux:
--	clk_disable_unprepare(res->phy_clk);
--err_clk_phy:
- 	clk_disable_unprepare(res->core_clk);
- err_clk_core:
- 	clk_disable_unprepare(res->iface_clk);