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, 93 insertions, 0 deletions

diff --git a/target/linux/layerscape/patches-5.4/808-i2c-0012-i2c-imx-correct-code-of-errata-A-010650-for-layersca.patch b/target/linux/layerscape/patches-5.4/808-i2c-0012-i2c-imx-correct-code-of-errata-A-010650-for-layersca.patch
new file mode 100644
index 0000000000..fe6d6d3135
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/808-i2c-0012-i2c-imx-correct-code-of-errata-A-010650-for-layersca.patch
@@ -0,0 +1,93 @@
+From 27ea8554c8fdcdf1d7aba5ce47630d878ce96691 Mon Sep 17 00:00:00 2001
+From: Biwen Li <biwen.li@nxp.com>
+Date: Thu, 24 Oct 2019 13:14:44 +0800
+Subject: [PATCH] i2c: imx: correct code of errata A-010650 for layerscape
+ platform
+
+- Simplify code with helper function i2c_imx_clr_al_bit
+- Fix an error about clearing arbitration lost bit
+- Fix an error that not set I2Cx_IBCR following by
+  the workaround of A-010650 (in step 5)
+
+Reviewed-by: Clark Wang <xiaoning.wang@nxp.com>
+Signed-off-by: Biwen Li <biwen.li@nxp.com>
+---
+ drivers/i2c/busses/i2c-imx.c | 38 +++++++++++++++++++-------------------
+ 1 file changed, 19 insertions(+), 19 deletions(-)
+
+--- a/drivers/i2c/busses/i2c-imx.c
++++ b/drivers/i2c/busses/i2c-imx.c
+@@ -503,6 +503,14 @@ static void i2c_imx_dma_free(struct imx_
+ 	dma->chan_using = NULL;
+ }
+ 
++/* Clear arbitration lost bit */
++static void i2c_imx_clr_al_bit(unsigned int status, struct imx_i2c_struct *i2c_imx)
++{
++	status &= ~I2SR_IAL;
++	status |= (i2c_imx->hwdata->i2sr_clr_opcode & I2SR_IAL);
++	imx_i2c_write_reg(status, i2c_imx, IMX_I2C_I2SR);
++}
++
+ static int i2c_imx_bus_busy(struct imx_i2c_struct *i2c_imx, int for_busy)
+ {
+ 	unsigned long orig_jiffies = jiffies;
+@@ -515,8 +523,7 @@ static int i2c_imx_bus_busy(struct imx_i
+ 
+ 		/* check for arbitration lost */
+ 		if (temp & I2SR_IAL) {
+-			temp &= ~I2SR_IAL;
+-			imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2SR);
++			i2c_imx_clr_al_bit(temp, i2c_imx);
+ 			return -EAGAIN;
+ 		}
+ 
+@@ -700,14 +707,6 @@ static void i2c_imx_clr_if_bit(unsigned
+ 	imx_i2c_write_reg(status, i2c_imx, IMX_I2C_I2SR);
+ }
+ 
+-/* Clear arbitration lost bit */
+-static void i2c_imx_clr_al_bit(unsigned int status, struct imx_i2c_struct *i2c_imx)
+-{
+-	status &= ~I2SR_IAL;
+-	status |= (i2c_imx->hwdata->i2sr_clr_opcode & I2SR_IAL);
+-	imx_i2c_write_reg(status, i2c_imx, IMX_I2C_I2SR);
+-}
+-
+ static irqreturn_t i2c_imx_master_isr(struct imx_i2c_struct *i2c_imx)
+ {
+ 	unsigned int status;
+@@ -1050,12 +1049,14 @@ static int i2c_imx_recovery_for_layersca
+ 	gpio_set_value(i2c_imx->gpio, 1);
+ 
+ 	/*
+-	 * Set I2Cx_IBCR = 0h00 to generate a STOP and then
+-	 * set I2Cx_IBCR = 0h80 to reset
++	 * Set I2Cx_IBCR = 0h00 to generate a STOP
+ 	 */
+-	temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);
+-	temp &= ~(I2CR_MSTA | I2CR_MTX);
+-	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);
++	imx_i2c_write_reg(i2c_imx->hwdata->i2cr_ien_opcode, i2c_imx, IMX_I2C_I2CR);
++
++	/*
++	 * Set I2Cx_IBCR = 0h80 to reset the I2Cx controller
++	 */
++	imx_i2c_write_reg(i2c_imx->hwdata->i2cr_ien_opcode | I2CR_IEN, i2c_imx, IMX_I2C_I2CR);
+ 
+ 	/* Restore the saved value of the register SCFG_RCWPMUXCR0 */
+ 	if (i2c_imx->need_set_pmuxcr == 1) {
+@@ -1069,10 +1070,9 @@ static int i2c_imx_recovery_for_layersca
+ 	 * I2C_IBSR[IBAL] = 1
+ 	 */
+ 	temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR);
+-	if (temp & I2SR_IAL) {
+-		temp &= ~I2SR_IAL;
+-		imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2SR);
+-	}
++	if (temp & I2SR_IAL)
++		i2c_imx_clr_al_bit(temp, i2c_imx);
++
+ 	return 0;
+ }
+