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cddd459140
Add patches for linux-5.4. The patches are from NXP LSDK-20.04 release which was tagged LSDK-20.04-V5.4. https://source.codeaurora.org/external/qoriq/qoriq-components/linux/ For boards LS1021A-IOT, and Traverse-LS1043 which are not involved in LSDK, port the dts patches from 4.14. The patches are sorted into the following categories: 301-arch-xxxx 302-dts-xxxx 303-core-xxxx 701-net-xxxx 801-audio-xxxx 802-can-xxxx 803-clock-xxxx 804-crypto-xxxx 805-display-xxxx 806-dma-xxxx 807-gpio-xxxx 808-i2c-xxxx 809-jailhouse-xxxx 810-keys-xxxx 811-kvm-xxxx 812-pcie-xxxx 813-pm-xxxx 814-qe-xxxx 815-sata-xxxx 816-sdhc-xxxx 817-spi-xxxx 818-thermal-xxxx 819-uart-xxxx 820-usb-xxxx 821-vfio-xxxx Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
101 lines
3.0 KiB
Diff
101 lines
3.0 KiB
Diff
From 12ae7ff3ecb4527ebe30ec6feb29ebb0ec4cd0a7 Mon Sep 17 00:00:00 2001
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From: Biwen Li <biwen.li@nxp.com>
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Date: Sat, 14 Sep 2019 12:37:49 +0800
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Subject: [PATCH] soc: fsl: handle RCPM errata A-008646 on SoC LS1021A
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Description:
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- Reading configuration register RCPM_IPPDEXPCR1
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always return zero
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Workaround:
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- Save register RCPM_IPPDEXPCR1's value to
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register SCFG_SPARECR8.(uboot's psci also
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need reading value from the register SCFG_SPARECR8
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to set register RCPM_IPPDEXPCR1)
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Impact:
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- FlexTimer module will cannot wakeup system in
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deep sleep on SoC LS1021A
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Reviewed-by: Ran Wang <ran.wang_1@nxp.com>
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Signed-off-by: Biwen Li <biwen.li@nxp.com>
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---
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drivers/soc/fsl/rcpm.c | 47 +++++++++++++++++++++++++++++++++++++++++++++--
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1 file changed, 45 insertions(+), 2 deletions(-)
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--- a/drivers/soc/fsl/rcpm.c
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+++ b/drivers/soc/fsl/rcpm.c
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@@ -6,13 +6,16 @@
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//
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// Author: Ran Wang <ran.wang_1@nxp.com>
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+#include <linux/acpi.h>
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#include <linux/init.h>
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+#include <linux/kernel.h>
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+#include <linux/mfd/syscon.h>
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#include <linux/module.h>
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-#include <linux/platform_device.h>
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#include <linux/of_address.h>
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+#include <linux/platform_device.h>
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+#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/suspend.h>
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-#include <linux/kernel.h>
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#define RCPM_WAKEUP_CELL_MAX_SIZE 7
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@@ -37,6 +40,9 @@ static int rcpm_pm_prepare(struct device
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struct device_node *np = dev->of_node;
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u32 value[RCPM_WAKEUP_CELL_MAX_SIZE + 1];
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u32 setting[RCPM_WAKEUP_CELL_MAX_SIZE] = {0};
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+ struct regmap *scfg_addr_regmap = NULL;
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+ u32 reg_offset[RCPM_WAKEUP_CELL_MAX_SIZE + 1];
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+ u32 reg_value = 0;
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rcpm = dev_get_drvdata(dev);
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if (!rcpm)
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@@ -90,6 +96,43 @@ static int rcpm_pm_prepare(struct device
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tmp |= ioread32be(address);
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iowrite32be(tmp, address);
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}
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+ /*
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+ * Workaround of errata A-008646 on SoC LS1021A:
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+ * There is a bug of register ippdexpcr1.
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+ * Reading configuration register RCPM_IPPDEXPCR1
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+ * always return zero. So save ippdexpcr1's value
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+ * to register SCFG_SPARECR8.And the value of
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+ * ippdexpcr1 will be read from SCFG_SPARECR8.
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+ */
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+ if (device_property_present(dev, "fsl,ippdexpcr1-alt-addr")) {
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+ if (dev_of_node(dev)) {
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+ scfg_addr_regmap = syscon_regmap_lookup_by_phandle(np,
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+ "fsl,ippdexpcr1-alt-addr");
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+ } else if (is_acpi_node(dev->fwnode)) {
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+ dev_err(dev, "not support acpi for rcpm\n");
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+ continue;
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+ }
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+
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+ if (scfg_addr_regmap && (i == 1)) {
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+ if (device_property_read_u32_array(dev,
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+ "fsl,ippdexpcr1-alt-addr",
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+ reg_offset,
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+ 1 + sizeof(u64)/sizeof(u32))) {
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+ scfg_addr_regmap = NULL;
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+ continue;
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+ }
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+ /* Read value from register SCFG_SPARECR8 */
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+ regmap_read(scfg_addr_regmap,
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+ (u32)(((u64)(reg_offset[1] << (sizeof(u32) * 8) |
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+ reg_offset[2])) & 0xffffffff),
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+ ®_value);
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+ /* Write value to register SCFG_SPARECR8 */
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+ regmap_write(scfg_addr_regmap,
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+ (u32)(((u64)(reg_offset[1] << (sizeof(u32) * 8) |
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+ reg_offset[2])) & 0xffffffff),
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+ tmp | reg_value);
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+ }
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+ }
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}
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return 0;
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