kernel: delete Linux 5.4 config and patches

As the upcoming release will be based on Linux 5.10 only, remove all
kernel configuration as well as patches for Linux 5.4.
There were no targets still actively using Linux 5.4.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(cherry picked from commit 3a14580411adfb75f9a44eded9f41245b9e44606)

1 files changed, 0 insertions, 282 deletions

diff --git a/target/linux/layerscape/patches-5.4/808-i2c-0011-i2c-imx-support-slave-mode-for-imx-I2C-driver.patch b/target/linux/layerscape/patches-5.4/808-i2c-0011-i2c-imx-support-slave-mode-for-imx-I2C-driver.patch
deleted file mode 100644
index 5377d05d0c..0000000000
--- a/target/linux/layerscape/patches-5.4/808-i2c-0011-i2c-imx-support-slave-mode-for-imx-I2C-driver.patch
+++ /dev/null
@@ -1,282 +0,0 @@
-From 865433df5d11aef7cfe5d51b362b6276bddb7a15 Mon Sep 17 00:00:00 2001
-From: Biwen Li <biwen.li@nxp.com>
-Date: Fri, 2 Aug 2019 17:45:56 +0800
-Subject: [PATCH] i2c: imx: support slave mode for imx I2C driver
-
-The patch supports slave mode for imx I2C driver
-
-Reviewed-by: Clark Wang <xiaoning.wang@nxp.com>
-Signed-off-by: Biwen Li <biwen.li@nxp.com>
----
- drivers/i2c/busses/i2c-imx.c | 219 +++++++++++++++++++++++++++++++++++++++----
- 1 file changed, 201 insertions(+), 18 deletions(-)
-
---- a/drivers/i2c/busses/i2c-imx.c
-+++ b/drivers/i2c/busses/i2c-imx.c
-@@ -265,6 +265,9 @@ struct imx_i2c_struct {
- 	int			pmuxcr_set;
- 	int			pmuxcr_endian;
- 	void __iomem		*pmuxcr_addr;
-+#if IS_ENABLED(CONFIG_I2C_SLAVE)
-+	struct i2c_client	*slave;
-+#endif
- };
- 
- static const struct imx_i2c_hwdata imx1_i2c_hwdata = {
-@@ -357,6 +360,14 @@ static inline unsigned char imx_i2c_read
- 	return readb(i2c_imx->base + (reg << i2c_imx->hwdata->regshift));
- }
- 
-+/* Set up i2c controller register and i2c status register to default value. */
-+static void i2c_imx_reset_regs(struct imx_i2c_struct *i2c_imx)
-+{
-+	imx_i2c_write_reg(i2c_imx->hwdata->i2cr_ien_opcode ^ I2CR_IEN,
-+			i2c_imx, IMX_I2C_I2CR);
-+	imx_i2c_write_reg(i2c_imx->hwdata->i2sr_clr_opcode, i2c_imx, IMX_I2C_I2SR);
-+}
-+
- /* Functions for DMA support */
- static void i2c_imx_dma_request(struct imx_i2c_struct *i2c_imx,
- 						dma_addr_t phy_addr)
-@@ -705,21 +716,33 @@ static void i2c_imx_stop(struct imx_i2c_
- 	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);
- }
- 
--static irqreturn_t i2c_imx_isr(int irq, void *dev_id)
-+/* Clear interrupt flag bit */
-+static void i2c_imx_clr_if_bit(unsigned int status, struct imx_i2c_struct *i2c_imx)
- {
--	struct imx_i2c_struct *i2c_imx = dev_id;
--	unsigned int temp;
-+	status &= ~I2SR_IIF;
-+	status |= (i2c_imx->hwdata->i2sr_clr_opcode & I2SR_IIF);
-+	imx_i2c_write_reg(status, i2c_imx, IMX_I2C_I2SR);
-+}
- 
--	temp = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR);
--	if (temp & I2SR_IIF) {
--		/* save status register */
--		i2c_imx->i2csr = temp;
--		i2c_imx_clear_irq(i2c_imx, I2SR_IIF);
--		wake_up(&i2c_imx->queue);
--		return IRQ_HANDLED;
--	}
-+/* 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;
-+
-+	/* Save status register */
-+	status = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR);
-+	i2c_imx->i2csr = status | I2SR_IIF;
-+
-+	wake_up(&i2c_imx->queue);
- 
--	return IRQ_NONE;
-+	return IRQ_HANDLED;
- }
- 
- static int i2c_imx_dma_write(struct imx_i2c_struct *i2c_imx,
-@@ -1094,6 +1117,13 @@ static int i2c_imx_xfer(struct i2c_adapt
- 
- 	dev_dbg(&i2c_imx->adapter.dev, "<%s>\n", __func__);
- 
-+#if IS_ENABLED(CONFIG_I2C_SLAVE)
-+	if (i2c_imx->slave) {
-+		dev_err(&i2c_imx->adapter.dev, "Please not do operations of master mode in slave mode");
-+		return -EBUSY;
-+	}
-+#endif
-+
- 	if (!pm_runtime_enabled(i2c_imx->adapter.dev.parent)) {
- 		pm_runtime_enable(i2c_imx->adapter.dev.parent);
- 		enable_runtime_pm = true;
-@@ -1307,11 +1337,169 @@ static u32 i2c_imx_func(struct i2c_adapt
- 		| I2C_FUNC_SMBUS_READ_BLOCK_DATA;
- }
- 
-+#if IS_ENABLED(CONFIG_I2C_SLAVE)
-+static int i2c_imx_slave_init(struct imx_i2c_struct *i2c_imx)
-+{
-+	int temp;
-+
-+	/* Resume */
-+	temp = pm_runtime_get_sync(i2c_imx->adapter.dev.parent);
-+	if (temp < 0) {
-+		dev_err(&i2c_imx->adapter.dev, "failed to resume i2c controller");
-+		return temp;
-+	}
-+
-+	/* Set slave addr. */
-+	imx_i2c_write_reg((i2c_imx->slave->addr << 1), i2c_imx, IMX_I2C_IADR);
-+
-+	i2c_imx_reset_regs(i2c_imx);
-+
-+	/* Enable module */
-+	temp = i2c_imx->hwdata->i2cr_ien_opcode;
-+	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);
-+
-+	/* Enable interrupt from i2c module */
-+	temp |= I2CR_IIEN;
-+	imx_i2c_write_reg(temp, i2c_imx, IMX_I2C_I2CR);
-+
-+	/* Wait controller to be stable */
-+	usleep_range(50, 150);
-+	return 0;
-+}
-+
-+static irqreturn_t i2c_imx_slave_isr(struct imx_i2c_struct *i2c_imx)
-+{
-+	unsigned int status, ctl;
-+	u8 value;
-+
-+	if (!i2c_imx->slave) {
-+		dev_err(&i2c_imx->adapter.dev, "cannot deal with slave irq,i2c_imx->slave is null");
-+		return IRQ_NONE;
-+	}
-+
-+	status = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR);
-+	ctl = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);
-+	if (status & I2SR_IAL) { /* Arbitration lost */
-+		i2c_imx_clr_al_bit(status, i2c_imx);
-+	} else if (status & I2SR_IAAS) { /* Addressed as a slave */
-+		if (status & I2SR_SRW) { /* Master wants to read from us*/
-+			dev_dbg(&i2c_imx->adapter.dev, "read requested");
-+			i2c_slave_event(i2c_imx->slave, I2C_SLAVE_READ_REQUESTED, &value);
-+
-+			/* Slave transmit */
-+			ctl |= I2CR_MTX;
-+			imx_i2c_write_reg(ctl, i2c_imx, IMX_I2C_I2CR);
-+
-+			/* Send data */
-+			imx_i2c_write_reg(value, i2c_imx, IMX_I2C_I2DR);
-+		} else { /* Master wants to write to us */
-+			dev_dbg(&i2c_imx->adapter.dev, "write requested");
-+			i2c_slave_event(i2c_imx->slave,	I2C_SLAVE_WRITE_REQUESTED, &value);
-+
-+			/* Slave receive */
-+			ctl &= ~I2CR_MTX;
-+			imx_i2c_write_reg(ctl, i2c_imx, IMX_I2C_I2CR);
-+			/* Dummy read */
-+			imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR);
-+		}
-+	} else if (!(ctl & I2CR_MTX)) { /* Receive mode */
-+			if (status & I2SR_IBB) { /* No STOP signal detected */
-+				ctl &= ~I2CR_MTX;
-+				imx_i2c_write_reg(ctl, i2c_imx, IMX_I2C_I2CR);
-+
-+				value = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR);
-+				i2c_slave_event(i2c_imx->slave,	I2C_SLAVE_WRITE_RECEIVED, &value);
-+			} else { /* STOP signal is detected */
-+				dev_dbg(&i2c_imx->adapter.dev,
-+					"STOP signal detected");
-+				i2c_slave_event(i2c_imx->slave, I2C_SLAVE_STOP, &value);
-+			}
-+	} else if (!(status & I2SR_RXAK)) {	/* Transmit mode received ACK */
-+		ctl |= I2CR_MTX;
-+		imx_i2c_write_reg(ctl, i2c_imx, IMX_I2C_I2CR);
-+
-+		i2c_slave_event(i2c_imx->slave,	I2C_SLAVE_READ_PROCESSED, &value);
-+
-+		imx_i2c_write_reg(value, i2c_imx, IMX_I2C_I2DR);
-+	} else { /* Transmit mode received NAK */
-+		ctl &= ~I2CR_MTX;
-+		imx_i2c_write_reg(ctl, i2c_imx, IMX_I2C_I2CR);
-+		imx_i2c_read_reg(i2c_imx, IMX_I2C_I2DR);
-+	}
-+	return IRQ_HANDLED;
-+}
-+
-+static int i2c_imx_reg_slave(struct i2c_client *client)
-+{
-+	struct imx_i2c_struct *i2c_imx = i2c_get_adapdata(client->adapter);
-+	int ret;
-+	if (i2c_imx->slave)
-+		return -EBUSY;
-+
-+	i2c_imx->slave = client;
-+
-+	ret = i2c_imx_slave_init(i2c_imx);
-+	if (ret < 0)
-+		dev_err(&i2c_imx->adapter.dev, "failed to switch to slave mode");
-+
-+	return ret;
-+}
-+
-+static int i2c_imx_unreg_slave(struct i2c_client *client)
-+{
-+	struct imx_i2c_struct *i2c_imx = i2c_get_adapdata(client->adapter);
-+	int ret;
-+
-+	if (!i2c_imx->slave)
-+		return -EINVAL;
-+
-+	/* Reset slave address. */
-+	imx_i2c_write_reg(0, i2c_imx, IMX_I2C_IADR);
-+
-+	i2c_imx_reset_regs(i2c_imx);
-+
-+	i2c_imx->slave = NULL;
-+
-+	/* Suspend */
-+	ret = pm_runtime_put_sync(i2c_imx->adapter.dev.parent);
-+	if (ret < 0)
-+		dev_err(&i2c_imx->adapter.dev, "failed to suspend i2c controller");
-+
-+	return ret;
-+}
-+#endif
-+
- static const struct i2c_algorithm i2c_imx_algo = {
- 	.master_xfer	= i2c_imx_xfer,
- 	.functionality	= i2c_imx_func,
-+#if IS_ENABLED(CONFIG_I2C_SLAVE)
-+	.reg_slave	= i2c_imx_reg_slave,
-+	.unreg_slave	= i2c_imx_unreg_slave,
-+#endif
- };
- 
-+static irqreturn_t i2c_imx_isr(int irq, void *dev_id)
-+{
-+	struct imx_i2c_struct *i2c_imx = dev_id;
-+	unsigned int status, ctl;
-+	irqreturn_t irq_status = IRQ_NONE;
-+
-+	status = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2SR);
-+	ctl = imx_i2c_read_reg(i2c_imx, IMX_I2C_I2CR);
-+
-+	if (status & I2SR_IIF) {
-+		i2c_imx_clr_if_bit(status, i2c_imx);
-+		if (ctl & I2CR_MSTA)
-+			irq_status = i2c_imx_master_isr(i2c_imx);
-+#if IS_ENABLED(CONFIG_I2C_SLAVE)
-+		else
-+			irq_status = i2c_imx_slave_isr(i2c_imx);
-+#endif
-+	}
-+
-+	return irq_status;
-+}
-+
- static int i2c_imx_probe(struct platform_device *pdev)
- {
- 	struct imx_i2c_struct *i2c_imx;
-@@ -1420,10 +1608,7 @@ static int i2c_imx_probe(struct platform
- 	if (is_imx7d_i2c(i2c_imx) && i2c_imx->bitrate > IMX_I2C_MAX_E_BIT_RATE)
- 		i2c_imx->bitrate = IMX_I2C_MAX_E_BIT_RATE;
- 
--	/* Set up chip registers to defaults */
--	imx_i2c_write_reg(i2c_imx->hwdata->i2cr_ien_opcode ^ I2CR_IEN,
--			i2c_imx, IMX_I2C_I2CR);
--	imx_i2c_write_reg(i2c_imx->hwdata->i2sr_clr_opcode, i2c_imx, IMX_I2C_I2SR);
-+	i2c_imx_reset_regs(i2c_imx);
- 
- 	/* Init optional bus recovery */
- 	if (of_match_node(pinmux_of_match, pdev->dev.of_node))