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-rw-r--r--drivers/tty/serial/lantiq.c83
-rw-r--r--drivers/tty/serial/sb1250-duart.c1
-rw-r--r--drivers/tty/serial/zs.c1
3 files changed, 53 insertions, 32 deletions
diff --git a/drivers/tty/serial/lantiq.c b/drivers/tty/serial/lantiq.c
index 96c1cacc736..02da071fe1e 100644
--- a/drivers/tty/serial/lantiq.c
+++ b/drivers/tty/serial/lantiq.c
@@ -31,16 +31,19 @@
#include <linux/tty_flip.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
-#include <linux/platform_device.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
#include <linux/io.h>
#include <linux/clk.h>
+#include <linux/gpio.h>
#include <lantiq_soc.h>
#define PORT_LTQ_ASC 111
#define MAXPORTS 2
#define UART_DUMMY_UER_RX 1
-#define DRVNAME "ltq_asc"
+#define DRVNAME "lantiq,asc"
#ifdef __BIG_ENDIAN
#define LTQ_ASC_TBUF (0x0020 + 3)
#define LTQ_ASC_RBUF (0x0024 + 3)
@@ -114,6 +117,9 @@ static DEFINE_SPINLOCK(ltq_asc_lock);
struct ltq_uart_port {
struct uart_port port;
+ /* clock used to derive divider */
+ struct clk *fpiclk;
+ /* clock gating of the ASC core */
struct clk *clk;
unsigned int tx_irq;
unsigned int rx_irq;
@@ -316,7 +322,9 @@ lqasc_startup(struct uart_port *port)
struct ltq_uart_port *ltq_port = to_ltq_uart_port(port);
int retval;
- port->uartclk = clk_get_rate(ltq_port->clk);
+ if (ltq_port->clk)
+ clk_enable(ltq_port->clk);
+ port->uartclk = clk_get_rate(ltq_port->fpiclk);
ltq_w32_mask(ASCCLC_DISS | ASCCLC_RMCMASK, (1 << ASCCLC_RMCOFFSET),
port->membase + LTQ_ASC_CLC);
@@ -382,6 +390,8 @@ lqasc_shutdown(struct uart_port *port)
port->membase + LTQ_ASC_RXFCON);
ltq_w32_mask(ASCTXFCON_TXFEN, ASCTXFCON_TXFFLU,
port->membase + LTQ_ASC_TXFCON);
+ if (ltq_port->clk)
+ clk_disable(ltq_port->clk);
}
static void
@@ -630,7 +640,7 @@ lqasc_console_setup(struct console *co, char *options)
port = &ltq_port->port;
- port->uartclk = clk_get_rate(ltq_port->clk);
+ port->uartclk = clk_get_rate(ltq_port->fpiclk);
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);
@@ -668,37 +678,32 @@ static struct uart_driver lqasc_reg = {
static int __init
lqasc_probe(struct platform_device *pdev)
{
+ struct device_node *node = pdev->dev.of_node;
struct ltq_uart_port *ltq_port;
struct uart_port *port;
- struct resource *mmres, *irqres;
- int tx_irq, rx_irq, err_irq;
- struct clk *clk;
+ struct resource *mmres, irqres[3];
+ int line = 0;
int ret;
mmres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- irqres = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!mmres || !irqres)
+ ret = of_irq_to_resource_table(node, irqres, 3);
+ if (!mmres || (ret != 3)) {
+ dev_err(&pdev->dev,
+ "failed to get memory/irq for serial port\n");
return -ENODEV;
+ }
- if (pdev->id >= MAXPORTS)
- return -EBUSY;
+ /* check if this is the console port */
+ if (mmres->start != CPHYSADDR(LTQ_EARLY_ASC))
+ line = 1;
- if (lqasc_port[pdev->id] != NULL)
+ if (lqasc_port[line]) {
+ dev_err(&pdev->dev, "port %d already allocated\n", line);
return -EBUSY;
-
- clk = clk_get(&pdev->dev, "fpi");
- if (IS_ERR(clk)) {
- pr_err("failed to get fpi clk\n");
- return -ENOENT;
}
- tx_irq = platform_get_irq_byname(pdev, "tx");
- rx_irq = platform_get_irq_byname(pdev, "rx");
- err_irq = platform_get_irq_byname(pdev, "err");
- if ((tx_irq < 0) | (rx_irq < 0) | (err_irq < 0))
- return -ENODEV;
-
- ltq_port = kzalloc(sizeof(struct ltq_uart_port), GFP_KERNEL);
+ ltq_port = devm_kzalloc(&pdev->dev, sizeof(struct ltq_uart_port),
+ GFP_KERNEL);
if (!ltq_port)
return -ENOMEM;
@@ -709,19 +714,26 @@ lqasc_probe(struct platform_device *pdev)
port->ops = &lqasc_pops;
port->fifosize = 16;
port->type = PORT_LTQ_ASC,
- port->line = pdev->id;
+ port->line = line;
port->dev = &pdev->dev;
-
- port->irq = tx_irq; /* unused, just to be backward-compatibe */
+ /* unused, just to be backward-compatible */
+ port->irq = irqres[0].start;
port->mapbase = mmres->start;
- ltq_port->clk = clk;
+ ltq_port->fpiclk = clk_get_fpi();
+ if (IS_ERR(ltq_port->fpiclk)) {
+ pr_err("failed to get fpi clk\n");
+ return -ENOENT;
+ }
- ltq_port->tx_irq = tx_irq;
- ltq_port->rx_irq = rx_irq;
- ltq_port->err_irq = err_irq;
+ /* not all asc ports have clock gates, lets ignore the return code */
+ ltq_port->clk = clk_get(&pdev->dev, NULL);
- lqasc_port[pdev->id] = ltq_port;
+ ltq_port->tx_irq = irqres[0].start;
+ ltq_port->rx_irq = irqres[1].start;
+ ltq_port->err_irq = irqres[2].start;
+
+ lqasc_port[line] = ltq_port;
platform_set_drvdata(pdev, ltq_port);
ret = uart_add_one_port(&lqasc_reg, port);
@@ -729,10 +741,17 @@ lqasc_probe(struct platform_device *pdev)
return ret;
}
+static const struct of_device_id ltq_asc_match[] = {
+ { .compatible = DRVNAME },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ltq_asc_match);
+
static struct platform_driver lqasc_driver = {
.driver = {
.name = DRVNAME,
.owner = THIS_MODULE,
+ .of_match_table = ltq_asc_match,
},
};
diff --git a/drivers/tty/serial/sb1250-duart.c b/drivers/tty/serial/sb1250-duart.c
index 0be8a2f00d0..f76b1688c5c 100644
--- a/drivers/tty/serial/sb1250-duart.c
+++ b/drivers/tty/serial/sb1250-duart.c
@@ -31,6 +31,7 @@
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/major.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
diff --git a/drivers/tty/serial/zs.c b/drivers/tty/serial/zs.c
index 4001eee6c08..92c00b24d0d 100644
--- a/drivers/tty/serial/zs.c
+++ b/drivers/tty/serial/zs.c
@@ -57,6 +57,7 @@
#include <linux/ioport.h>
#include <linux/irqflags.h>
#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/major.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-20 03:57:56 +0000