layerscape: add patches-5.4

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>

1 files changed, 193 insertions, 0 deletions

diff --git a/target/linux/layerscape/patches-5.4/802-can-0027-can-flexcan-add-CAN-wakeup-function-for-i.MX8.patch b/target/linux/layerscape/patches-5.4/802-can-0027-can-flexcan-add-CAN-wakeup-function-for-i.MX8.patch
new file mode 100644
index 0000000000..bf0eac482d
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/802-can-0027-can-flexcan-add-CAN-wakeup-function-for-i.MX8.patch
@@ -0,0 +1,193 @@
+From 140de383d9d26e8be300b7ba86d56b47898cd8c9 Mon Sep 17 00:00:00 2001
+From: Joakim Zhang <qiangqing.zhang@nxp.com>
+Date: Tue, 30 Jul 2019 18:01:11 +0800
+Subject: [PATCH] can: flexcan: add CAN wakeup function for i.MX8
+
+The System Controller Firmware (SCFW) is a low-level system function
+which runs on a dedicated Cortex-M core to provide power, clock, and
+resource management. It exists on some i.MX8 processors. e.g. i.MX8QM
+(QM, QP), and i.MX8QX (QXP, DX).
+
+SCU driver manages the IPC interface between host CPU and the
+SCU firmware running on M4.
+
+For i.MX8, stop mode request is controlled by System Controller Unit(SCU)
+firmware.
+
+Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
+---
+ drivers/net/can/flexcan.c | 99 ++++++++++++++++++++++++++++++++++++++++-------
+ 1 file changed, 86 insertions(+), 13 deletions(-)
+
+--- a/drivers/net/can/flexcan.c
++++ b/drivers/net/can/flexcan.c
+@@ -29,6 +29,11 @@
+ #include <linux/pinctrl/consumer.h>
+ #include <linux/regmap.h>
+ 
++#ifdef CONFIG_IMX_SCU_SOC
++#include <linux/firmware/imx/sci.h>
++#include <dt-bindings/firmware/imx/rsrc.h>
++#endif
++
+ #define DRV_NAME			"flexcan"
+ 
+ /* 8 for RX fifo and 2 error handling */
+@@ -223,6 +228,7 @@
+ #define FLEXCAN_QUIRK_DEFAULT_BIG_ENDIAN	BIT(7) /* default to BE register access */
+ #define FLEXCAN_QUIRK_SETUP_STOP_MODE		BIT(8) /* Setup stop mode to support wakeup */
+ #define FLEXCAN_QUIRK_TIMESTAMP_SUPPORT_FD	BIT(9) /* Use timestamp then support can fd mode */
++#define FLEXCAN_QUIRK_USE_SCFW			BIT(10) /* Use System Controller Firmware */
+ 
+ /* Structure of the message buffer */
+ struct flexcan_mb {
+@@ -323,6 +329,11 @@ struct flexcan_priv {
+ 	struct regulator *reg_xceiver;
+ 	struct flexcan_stop_mode stm;
+ 
++#ifdef CONFIG_IMX_SCU_SOC
++	/* IPC handle when enable stop mode by System Controller firmware(scfw) */
++	struct imx_sc_ipc *sc_ipc_handle;
++#endif
++
+ 	/* Read and Write APIs */
+ 	u32 (*read)(void __iomem *addr);
+ 	void (*write)(u32 val, void __iomem *addr);
+@@ -352,7 +363,8 @@ static const struct flexcan_devtype_data
+ static struct flexcan_devtype_data fsl_imx8qm_devtype_data = {
+ 	.quirks = FLEXCAN_QUIRK_DISABLE_RXFG | FLEXCAN_QUIRK_ENABLE_EACEN_RRS |
+ 		FLEXCAN_QUIRK_USE_OFF_TIMESTAMP | FLEXCAN_QUIRK_BROKEN_PERR_STATE |
+-		FLEXCAN_QUIRK_TIMESTAMP_SUPPORT_FD,
++		FLEXCAN_QUIRK_TIMESTAMP_SUPPORT_FD | FLEXCAN_QUIRK_SETUP_STOP_MODE |
++		FLEXCAN_QUIRK_USE_SCFW,
+ };
+ 
+ static const struct flexcan_devtype_data fsl_vf610_devtype_data = {
+@@ -504,6 +516,32 @@ static void flexcan_enable_wakeup_irq(st
+ 	priv->write(reg_mcr, &regs->mcr);
+ }
+ 
++#ifdef CONFIG_IMX_SCU_SOC
++static void flexcan_stop_mode_enable_scfw(struct flexcan_priv *priv, bool enabled)
++{
++	struct device_node *np = priv->dev->of_node;
++	u32 rsrc_id, val;
++	int idx;
++
++	idx = of_alias_get_id(np, "can");
++	if (idx == 0)
++		rsrc_id = IMX_SC_R_CAN_0;
++	else if (idx == 1)
++		rsrc_id = IMX_SC_R_CAN_1;
++	else
++		rsrc_id = IMX_SC_R_CAN_2;
++
++	val = enabled ? 1 : 0;
++	/* stop mode request */
++	imx_sc_misc_set_control(priv->sc_ipc_handle, rsrc_id, IMX_SC_C_IPG_STOP, val);
++}
++#else
++static int flexcan_stop_mode_enable_scfw(struct flexcan_priv *priv, bool enabled)
++{
++	return 0;
++}
++#endif
++
+ static inline int flexcan_enter_stop_mode(struct flexcan_priv *priv)
+ {
+ 	struct flexcan_regs __iomem *regs = priv->regs;
+@@ -513,9 +551,12 @@ static inline int flexcan_enter_stop_mod
+ 	reg_mcr |= FLEXCAN_MCR_SLF_WAK;
+ 	priv->write(reg_mcr, &regs->mcr);
+ 
+-	/* enable stop request */
+-	regmap_update_bits(priv->stm.gpr, priv->stm.req_gpr,
+-			   1 << priv->stm.req_bit, 1 << priv->stm.req_bit);
++	 /* enable stop request */
++	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_SCFW)
++		flexcan_stop_mode_enable_scfw(priv, true);
++	else
++		regmap_update_bits(priv->stm.gpr, priv->stm.req_gpr,
++				   1 << priv->stm.req_bit, 1 << priv->stm.req_bit);
+ 
+ 	return flexcan_low_power_enter_ack(priv);
+ }
+@@ -526,8 +567,11 @@ static inline int flexcan_exit_stop_mode
+ 	u32 reg_mcr;
+ 
+ 	/* remove stop request */
+-	regmap_update_bits(priv->stm.gpr, priv->stm.req_gpr,
+-			   1 << priv->stm.req_bit, 0);
++	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_SCFW)
++		flexcan_stop_mode_enable_scfw(priv, false);
++	else
++		regmap_update_bits(priv->stm.gpr, priv->stm.req_gpr,
++				   1 << priv->stm.req_bit, 0);
+ 
+ 
+ 	reg_mcr = priv->read(&regs->mcr);
+@@ -1745,11 +1789,6 @@ static int flexcan_setup_stop_mode(struc
+ 		gpr_np->full_name, priv->stm.req_gpr, priv->stm.req_bit,
+ 		priv->stm.ack_gpr, priv->stm.ack_bit);
+ 
+-	device_set_wakeup_capable(&pdev->dev, true);
+-
+-	if (of_property_read_bool(np, "wakeup-source"))
+-		device_set_wakeup_enable(&pdev->dev, true);
+-
+ 	return 0;
+ 
+ out_put_node:
+@@ -1757,6 +1796,30 @@ out_put_node:
+ 	return ret;
+ }
+ 
++#ifdef CONFIG_IMX_SCU_SOC
++static int flexcan_setup_stop_mode_scfw(struct platform_device *pdev)
++{
++	struct net_device *dev = platform_get_drvdata(pdev);
++	struct flexcan_priv *priv;
++	int ret;
++
++	priv = netdev_priv(dev);
++
++	ret = imx_scu_get_handle(&(priv->sc_ipc_handle));
++	if (ret < 0) {
++		dev_err(&pdev->dev, "get ipc handle used by SCU failed\n");
++		return ret;
++	}
++
++	return 0;
++}
++#else
++static int flexcan_setup_stop_mode_scfw(struct platform_device *pdev)
++{
++	return 0;
++}
++#endif
++
+ static const struct of_device_id flexcan_of_match[] = {
+ 	{ .compatible = "fsl,imx8qm-flexcan", .data = &fsl_imx8qm_devtype_data, },
+ 	{ .compatible = "fsl,imx6q-flexcan", .data = &fsl_imx6q_devtype_data, },
+@@ -1899,9 +1962,19 @@ static int flexcan_probe(struct platform
+ 	devm_can_led_init(dev);
+ 
+ 	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE) {
+-		err = flexcan_setup_stop_mode(pdev);
+-		if (err)
++		if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_SCFW)
++			err = flexcan_setup_stop_mode_scfw(pdev);
++		else
++			err = flexcan_setup_stop_mode(pdev);
++
++		if (err) {
+ 			dev_dbg(&pdev->dev, "failed to setup stop-mode\n");
++		} else {
++			device_set_wakeup_capable(&pdev->dev, true);
++
++			if (of_property_read_bool(pdev->dev.of_node, "wakeup-source"))
++				device_set_wakeup_enable(&pdev->dev, true);
++		}
+ 	}
+ 
+ 	return 0;