Merging upstream version 6.9.7.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

7 files changed, 145 insertions, 79 deletions

diff --git a/drivers/tty/serial/8250/8250_bcm7271.c b/drivers/tty/serial/8250/8250_bcm7271.c
index 5daa38d9c6..61d81b11f6 100644
--- a/drivers/tty/serial/8250/8250_bcm7271.c
+++ b/drivers/tty/serial/8250/8250_bcm7271.c
@@ -675,18 +675,46 @@ static void init_real_clk_rates(struct device *dev, struct brcmuart_priv *priv)
 	clk_set_rate(priv->baud_mux_clk, priv->default_mux_rate);
 }
 
+static u32 find_quot(struct device *dev, u32 freq, u32 baud, u32 *percent)
+{
+	u32 quot;
+	u32 rate;
+	u64 hires_rate;
+	u64 hires_baud;
+	u64 hires_err;
+
+	rate = freq / 16;
+	quot = DIV_ROUND_CLOSEST(rate, baud);
+	if (!quot)
+		return 0;
+
+	/* increase resolution to get xx.xx percent */
+	hires_rate = div_u64((u64)rate * 10000, (u64)quot);
+	hires_baud = (u64)baud * 10000;
+
+	/* get the delta */
+	if (hires_rate > hires_baud)
+		hires_err = (hires_rate - hires_baud);
+	else
+		hires_err = (hires_baud - hires_rate);
+
+	*percent = (unsigned long)DIV_ROUND_CLOSEST_ULL(hires_err, baud);
+
+	dev_dbg(dev, "Baud rate: %u, MUX Clk: %u, Error: %u.%u%%\n",
+		baud, freq, *percent / 100, *percent % 100);
+
+	return quot;
+}
+
 static void set_clock_mux(struct uart_port *up, struct brcmuart_priv *priv,
 			u32 baud)
 {
 	u32 percent;
 	u32 best_percent = UINT_MAX;
 	u32 quot;
+	u32 freq;
 	u32 best_quot = 1;
-	u32 rate;
-	int best_index = -1;
-	u64 hires_rate;
-	u64 hires_baud;
-	u64 hires_err;
+	u32 best_freq = 0;
 	int rc;
 	int i;
 	int real_baud;
@@ -695,44 +723,35 @@ static void set_clock_mux(struct uart_port *up, struct brcmuart_priv *priv,
 	if (priv->baud_mux_clk == NULL)
 		return;
 
-	/* Find the closest match for specified baud */
-	for (i = 0; i < ARRAY_SIZE(priv->real_rates); i++) {
-		if (priv->real_rates[i] == 0)
-			continue;
-		rate = priv->real_rates[i] / 16;
-		quot = DIV_ROUND_CLOSEST(rate, baud);
-		if (!quot)
-			continue;
-
-		/* increase resolution to get xx.xx percent */
-		hires_rate = (u64)rate * 10000;
-		hires_baud = (u64)baud * 10000;
-
-		hires_err = div_u64(hires_rate, (u64)quot);
-
-		/* get the delta */
-		if (hires_err > hires_baud)
-			hires_err = (hires_err - hires_baud);
-		else
-			hires_err = (hires_baud - hires_err);
-
-		percent = (unsigned long)DIV_ROUND_CLOSEST_ULL(hires_err, baud);
-		dev_dbg(up->dev,
-			"Baud rate: %u, MUX Clk: %u, Error: %u.%u%%\n",
-			baud, priv->real_rates[i], percent / 100,
-			percent % 100);
-		if (percent < best_percent) {
-			best_percent = percent;
-			best_index = i;
-			best_quot = quot;
+	/* Try default_mux_rate first */
+	quot = find_quot(up->dev, priv->default_mux_rate, baud, &percent);
+	if (quot) {
+		best_percent = percent;
+		best_freq = priv->default_mux_rate;
+		best_quot = quot;
+	}
+	/* If more than 1% error, find the closest match for specified baud */
+	if (best_percent > 100) {
+		for (i = 0; i < ARRAY_SIZE(priv->real_rates); i++) {
+			freq = priv->real_rates[i];
+			if (freq == 0 || freq == priv->default_mux_rate)
+				continue;
+			quot = find_quot(up->dev, freq, baud, &percent);
+			if (!quot)
+				continue;
+
+			if (percent < best_percent) {
+				best_percent = percent;
+				best_freq = freq;
+				best_quot = quot;
+			}
 		}
 	}
-	if (best_index == -1) {
+	if (!best_freq) {
 		dev_err(up->dev, "Error, %d BAUD rate is too fast.\n", baud);
 		return;
 	}
-	rate = priv->real_rates[best_index];
-	rc = clk_set_rate(priv->baud_mux_clk, rate);
+	rc = clk_set_rate(priv->baud_mux_clk, best_freq);
 	if (rc)
 		dev_err(up->dev, "Error selecting BAUD MUX clock\n");
 
@@ -741,8 +760,8 @@ static void set_clock_mux(struct uart_port *up, struct brcmuart_priv *priv,
 		dev_err(up->dev, "Error, baud: %d has %u.%u%% error\n",
 			baud, percent / 100, percent % 100);
 
-	real_baud = rate / 16 / best_quot;
-	dev_dbg(up->dev, "Selecting BAUD MUX rate: %u\n", rate);
+	real_baud = best_freq / 16 / best_quot;
+	dev_dbg(up->dev, "Selecting BAUD MUX rate: %u\n", best_freq);
 	dev_dbg(up->dev, "Requested baud: %u, Actual baud: %u\n",
 		baud, real_baud);
 
@@ -751,7 +770,7 @@ static void set_clock_mux(struct uart_port *up, struct brcmuart_priv *priv,
 	i += (i / 2);
 	priv->char_wait = ns_to_ktime(i);
 
-	up->uartclk = rate;
+	up->uartclk = best_freq;
 }
 
 static void brcmstb_set_termios(struct uart_port *up,
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index 1300c92b87..a58890fd53 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -55,6 +55,34 @@
 #define DW_UART_QUIRK_SKIP_SET_RATE	BIT(2)
 #define DW_UART_QUIRK_IS_DMA_FC		BIT(3)
 #define DW_UART_QUIRK_APMC0D08		BIT(4)
+#define DW_UART_QUIRK_CPR_VALUE		BIT(5)
+
+struct dw8250_platform_data {
+	u8 usr_reg;
+	u32 cpr_value;
+	unsigned int quirks;
+};
+
+struct dw8250_data {
+	struct dw8250_port_data	data;
+	const struct dw8250_platform_data *pdata;
+
+	int			msr_mask_on;
+	int			msr_mask_off;
+	struct clk		*clk;
+	struct clk		*pclk;
+	struct notifier_block	clk_notifier;
+	struct work_struct	clk_work;
+	struct reset_control	*rst;
+
+	unsigned int		skip_autocfg:1;
+	unsigned int		uart_16550_compatible:1;
+};
+
+static inline struct dw8250_data *to_dw8250_data(struct dw8250_port_data *data)
+{
+	return container_of(data, struct dw8250_data, data);
+}
 
 static inline struct dw8250_data *clk_to_dw8250_data(struct notifier_block *nb)
 {
@@ -445,6 +473,10 @@ static void dw8250_prepare_rx_dma(struct uart_8250_port *p)
 static void dw8250_quirks(struct uart_port *p, struct dw8250_data *data)
 {
 	unsigned int quirks = data->pdata ? data->pdata->quirks : 0;
+	u32 cpr_value = data->pdata ? data->pdata->cpr_value : 0;
+
+	if (quirks & DW_UART_QUIRK_CPR_VALUE)
+		data->data.cpr_value = cpr_value;
 
 #ifdef CONFIG_64BIT
 	if (quirks & DW_UART_QUIRK_OCTEON) {
@@ -727,8 +759,8 @@ static const struct dw8250_platform_data dw8250_armada_38x_data = {
 
 static const struct dw8250_platform_data dw8250_renesas_rzn1_data = {
 	.usr_reg = DW_UART_USR,
-	.cpr_val = 0x00012f32,
-	.quirks = DW_UART_QUIRK_IS_DMA_FC,
+	.cpr_value = 0x00012f32,
+	.quirks = DW_UART_QUIRK_CPR_VALUE | DW_UART_QUIRK_IS_DMA_FC,
 };
 
 static const struct dw8250_platform_data dw8250_starfive_jh7100_data = {
diff --git a/drivers/tty/serial/8250/8250_dwlib.c b/drivers/tty/serial/8250/8250_dwlib.c
index 3e33ddf7bc..5a2520943d 100644
--- a/drivers/tty/serial/8250/8250_dwlib.c
+++ b/drivers/tty/serial/8250/8250_dwlib.c
@@ -242,7 +242,6 @@ static const struct serial_rs485 dw8250_rs485_supported = {
 void dw8250_setup_port(struct uart_port *p)
 {
 	struct dw8250_port_data *pd = p->private_data;
-	struct dw8250_data *data = to_dw8250_data(pd);
 	struct uart_8250_port *up = up_to_u8250p(p);
 	u32 reg, old_dlf;
 
@@ -278,7 +277,7 @@ void dw8250_setup_port(struct uart_port *p)
 
 	reg = dw8250_readl_ext(p, DW_UART_CPR);
 	if (!reg) {
-		reg = data->pdata->cpr_val;
+		reg = pd->cpr_value;
 		dev_dbg(p->dev, "CPR is not available, using 0x%08x instead\n", reg);
 	}
 	if (!reg)
diff --git a/drivers/tty/serial/8250/8250_dwlib.h b/drivers/tty/serial/8250/8250_dwlib.h
index f13e91f2ca..7dd2a8e7b7 100644
--- a/drivers/tty/serial/8250/8250_dwlib.h
+++ b/drivers/tty/serial/8250/8250_dwlib.h
@@ -2,15 +2,10 @@
 /* Synopsys DesignWare 8250 library header file. */
 
 #include <linux/io.h>
-#include <linux/notifier.h>
 #include <linux/types.h>
-#include <linux/workqueue.h>
 
 #include "8250.h"
 
-struct clk;
-struct reset_control;
-
 struct dw8250_port_data {
 	/* Port properties */
 	int			line;
@@ -19,42 +14,16 @@ struct dw8250_port_data {
 	struct uart_8250_dma	dma;
 
 	/* Hardware configuration */
+	u32			cpr_value;
 	u8			dlf_size;
 
 	/* RS485 variables */
 	bool			hw_rs485_support;
 };
 
-struct dw8250_platform_data {
-	u8 usr_reg;
-	u32 cpr_val;
-	unsigned int quirks;
-};
-
-struct dw8250_data {
-	struct dw8250_port_data	data;
-	const struct dw8250_platform_data *pdata;
-
-	int			msr_mask_on;
-	int			msr_mask_off;
-	struct clk		*clk;
-	struct clk		*pclk;
-	struct notifier_block	clk_notifier;
-	struct work_struct	clk_work;
-	struct reset_control	*rst;
-
-	unsigned int		skip_autocfg:1;
-	unsigned int		uart_16550_compatible:1;
-};
-
 void dw8250_do_set_termios(struct uart_port *p, struct ktermios *termios, const struct ktermios *old);
 void dw8250_setup_port(struct uart_port *p);
 
-static inline struct dw8250_data *to_dw8250_data(struct dw8250_port_data *data)
-{
-	return container_of(data, struct dw8250_data, data);
-}
-
 static inline u32 dw8250_readl_ext(struct uart_port *p, int offset)
 {
 	if (p->iotype == UPIO_MEM32BE)
diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index 0440df7de1..4d1e07343d 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -46,8 +46,50 @@
 #define PCI_DEVICE_ID_COMMTECH_4228PCIE		0x0021
 #define PCI_DEVICE_ID_COMMTECH_4222PCIE		0x0022
 
+#define PCI_VENDOR_ID_CONNECT_TECH				0x12c4
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_2_SP_OPTO        0x0340
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_4_SP_OPTO_A      0x0341
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_4_SP_OPTO_B      0x0342
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_2_XPRS           0x0350
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_4_XPRS_A         0x0351
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_4_XPRS_B         0x0352
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_8_XPRS           0x0353
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_16_XPRS_A        0x0354
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_16_XPRS_B        0x0355
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_2_XPRS_OPTO      0x0360
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_4_XPRS_OPTO_A    0x0361
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_4_XPRS_OPTO_B    0x0362
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_8_SP             0x0370
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_8_SP_232         0x0371
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_8_SP_485         0x0372
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_4_4_SP           0x0373
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_6_2_SP           0x0374
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_2_6_SP           0x0375
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_8_SP_232_NS      0x0376
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_2_XP_OPTO_LEFT   0x0380
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_2_XP_OPTO_RIGHT  0x0381
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_4_XP_OPTO        0x0382
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_4_4_XPRS_OPTO    0x0392
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_8_XPRS_LP        0x03A0
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_8_XPRS_LP_232    0x03A1
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_8_XPRS_LP_485    0x03A2
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCI_UART_8_XPRS_LP_232_NS 0x03A3
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCIE_XEG001               0x0602
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCIE_XR35X_BASE           0x1000
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCIE_XR35X_2              0x1002
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCIE_XR35X_4              0x1004
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCIE_XR35X_8              0x1008
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCIE_XR35X_12             0x100C
+#define PCI_SUBDEVICE_ID_CONNECT_TECH_PCIE_XR35X_16             0x1010
+#define PCI_DEVICE_ID_CONNECT_TECH_PCI_XR79X_12_XIG00X          0x110c
+#define PCI_DEVICE_ID_CONNECT_TECH_PCI_XR79X_12_XIG01X          0x110d
+#define PCI_DEVICE_ID_CONNECT_TECH_PCI_XR79X_16                 0x1110
+
 #define PCI_DEVICE_ID_EXAR_XR17V4358		0x4358
 #define PCI_DEVICE_ID_EXAR_XR17V8358		0x8358
+#define PCI_DEVICE_ID_EXAR_XR17V252		0x0252
+#define PCI_DEVICE_ID_EXAR_XR17V254		0x0254
+#define PCI_DEVICE_ID_EXAR_XR17V258		0x0258
 
 #define PCI_SUBDEVICE_ID_USR_2980		0x0128
 #define PCI_SUBDEVICE_ID_USR_2981		0x0129
diff --git a/drivers/tty/serial/8250/8250_mtk.c b/drivers/tty/serial/8250/8250_mtk.c
index 9ff6bbe9c0..d14988d149 100644
--- a/drivers/tty/serial/8250/8250_mtk.c
+++ b/drivers/tty/serial/8250/8250_mtk.c
@@ -209,15 +209,19 @@ static int mtk8250_startup(struct uart_port *port)
 
 static void mtk8250_shutdown(struct uart_port *port)
 {
-#ifdef CONFIG_SERIAL_8250_DMA
 	struct uart_8250_port *up = up_to_u8250p(port);
 	struct mtk8250_data *data = port->private_data;
+	int irq = data->rx_wakeup_irq;
 
+#ifdef CONFIG_SERIAL_8250_DMA
 	if (up->dma)
 		data->rx_status = DMA_RX_SHUTDOWN;
 #endif
 
-	return serial8250_do_shutdown(port);
+	serial8250_do_shutdown(port);
+
+	if (irq >= 0)
+		serial8250_do_set_mctrl(&up->port, TIOCM_RTS);
 }
 
 static void mtk8250_disable_intrs(struct uart_8250_port *up, int mask)
diff --git a/drivers/tty/serial/8250/8250_pxa.c b/drivers/tty/serial/8250/8250_pxa.c
index f1a51b00b1..ba96fa913e 100644
--- a/drivers/tty/serial/8250/8250_pxa.c
+++ b/drivers/tty/serial/8250/8250_pxa.c
@@ -125,6 +125,7 @@ static int serial_pxa_probe(struct platform_device *pdev)
 	uart.port.iotype = UPIO_MEM32;
 	uart.port.regshift = 2;
 	uart.port.fifosize = 64;
+	uart.tx_loadsz = 32;
 	uart.dl_write = serial_pxa_dl_write;
 
 	ret = serial8250_register_8250_port(&uart);