[PATCH v4 10/13] tty: serial: qcom-geni-serial: use of_device_id data

Bartosz Golaszewski
2022-11-29T11:01:22Z

Instead of checking the device compatible in probe(), assign the
device-specific data to struct of_device_id. We'll use it later when
providing SE DMA support.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
drivers/tty/serial/qcom_geni_serial.c | 46 ++++++++++++++++++++-------
1 file changed, 34 insertions(+), 12 deletions(-)

diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 7d6330f85ec2..fe15fc0e1345 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -95,6 +95,11 @@
/* We always configure 4 bytes per FIFO word */
#define BYTES_PER_FIFO_WORD 4U

+struct qcom_geni_device_data {
+ bool console;
+ void (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop);
+};
+
struct qcom_geni_private_data {
/* NOTE: earlycon port will have NULL here */
struct uart_driver *drv;
@@ -114,7 +119,6 @@ struct qcom_geni_serial_port {
u32 tx_fifo_width;
u32 rx_fifo_depth;
bool setup;
- void (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop);
unsigned int baud;
void *rx_fifo;
u32 loopback;
@@ -126,6 +130,7 @@ struct qcom_geni_serial_port {
bool cts_rts_swap;

struct qcom_geni_private_data private_data;
+ const struct qcom_geni_device_data *dev_data;
};

static const struct uart_ops qcom_geni_console_pops;
@@ -640,7 +645,7 @@ static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop)
total_bytes += last_word_byte_cnt;
else
total_bytes += BYTES_PER_FIFO_WORD;
- port->handle_rx(uport, total_bytes, drop);
+ port->dev_data->handle_rx(uport, total_bytes, drop);
}

static void qcom_geni_serial_stop_rx(struct uart_port *uport)
@@ -1344,13 +1349,14 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
struct uart_port *uport;
struct resource *res;
int irq;
- bool console = false;
struct uart_driver *drv;
+ const struct qcom_geni_device_data *data;

- if (of_device_is_compatible(pdev->dev.of_node, "qcom,geni-debug-uart"))
- console = true;
+ data = of_device_get_match_data(&pdev->dev);
+ if (!data)
+ return -EINVAL;

- if (console) {
+ if (data->console) {
drv = &qcom_geni_console_driver;
line = of_alias_get_id(pdev->dev.of_node, "serial");
} else {
@@ -1360,7 +1366,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
line = of_alias_get_id(pdev->dev.of_node, "hsuart");
}

- port = get_port_from_line(line, console);
+ port = get_port_from_line(line, data->console);
if (IS_ERR(port)) {
dev_err(&pdev->dev, "Invalid line %d\n", line);
return PTR_ERR(port);
@@ -1372,6 +1378,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
return -ENODEV;

uport->dev = &pdev->dev;
+ port->dev_data = data;
port->se.dev = &pdev->dev;
port->se.wrapper = dev_get_drvdata(pdev->dev.parent);
port->se.clk = devm_clk_get(&pdev->dev, "se");
@@ -1390,7 +1397,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
port->rx_fifo_depth = DEF_FIFO_DEPTH_WORDS;
port->tx_fifo_width = DEF_FIFO_WIDTH_BITS;

- if (!console) {
+ if (!data->console) {
port->rx_fifo = devm_kcalloc(uport->dev,
port->rx_fifo_depth, sizeof(u32), GFP_KERNEL);
if (!port->rx_fifo)
@@ -1420,7 +1427,7 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
uport->irq = irq;
uport->has_sysrq = IS_ENABLED(CONFIG_SERIAL_QCOM_GENI_CONSOLE);

- if (!console)
+ if (!data->console)
port->wakeup_irq = platform_get_irq_optional(pdev, 1);

if (of_property_read_bool(pdev->dev.of_node, "rx-tx-swap"))
@@ -1442,7 +1449,6 @@ static int qcom_geni_serial_probe(struct platform_device *pdev)
port->private_data.drv = drv;
uport->private_data = &port->private_data;
platform_set_drvdata(pdev, port);
- port->handle_rx = console ? handle_rx_console : handle_rx_uart;

ret = uart_add_one_port(drv, uport);
if (ret)
@@ -1522,14 +1528,30 @@ static int __maybe_unused qcom_geni_serial_sys_resume(struct device *dev)
return ret;
}

+static const struct qcom_geni_device_data qcom_geni_console_data = {
+ .console = true,
+ .handle_rx = handle_rx_console,
+};
+
+static const struct qcom_geni_device_data qcom_geni_uart_data = {
+ .console = false,
+ .handle_rx = handle_rx_uart,
+};
+
static const struct dev_pm_ops qcom_geni_serial_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(qcom_geni_serial_sys_suspend,
qcom_geni_serial_sys_resume)
};

static const struct of_device_id qcom_geni_serial_match_table[] = {
- { .compatible = "qcom,geni-debug-uart", },
- { .compatible = "qcom,geni-uart", },
+ {
+ .compatible = "qcom,geni-debug-uart",
+ .data = &qcom_geni_console_data,
+ },
+ {
+ .compatible = "qcom,geni-uart",
+ .data = &qcom_geni_uart_data,
+ },
{}
};
MODULE_DEVICE_TABLE(of, qcom_geni_serial_match_table);
--
2.37.2