diff mbox series

[v4,3/9] serial: 8250: dw: Create a more generic platform data structure

Message ID 20220330132038.808679-4-miquel.raynal@bootlin.com
State New
Headers show
Series [v4,1/9] serial: 8250: dw: Move definitions to the shared header | expand

Commit Message

Miquel Raynal March 30, 2022, 1:20 p.m. UTC 
Before adding more platform data information, let's turn the quirks
information as being a member of a wider structure. More fields will be
added later.

At the same time, change the quirks type to unsigned int, as its size
won't change between setups and we don't really need this variable to be
more than a few bits wide anyway.

Provide a stub to the compatibles without quirks to simplify handling.
Keep two different empty structure for the base DW compatible and the
Renesas one because the latter will soon be fulfilled anyway.

Cc: Emil Renner Berthing <kernel@esmil.dk>
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 drivers/tty/serial/8250/8250_dw.c    | 32 ++++++++++++++++++++++------
 drivers/tty/serial/8250/8250_dwlib.h |  5 +++++
 2 files changed, 30 insertions(+), 7 deletions(-)
diff mbox series

Patch

diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index b6238b9bf0b2..70a843e31ffd 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -19,6 +19,7 @@ 
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
+#include <linux/property.h>
 #include <linux/workqueue.h>
 #include <linux/notifier.h>
 #include <linux/slab.h>
@@ -371,7 +372,7 @@  static bool dw8250_idma_filter(struct dma_chan *chan, void *param)
 static void dw8250_quirks(struct uart_port *p, struct dw8250_data *data)
 {
 	struct device_node *np = p->dev->of_node;
-	unsigned long quirks = (unsigned long)device_get_match_data(p->dev);
+	unsigned int quirks = data->pdata->quirks;
 
 	if (np) {
 		int id;
@@ -462,6 +463,7 @@  static int dw8250_probe(struct platform_device *pdev)
 
 	data->data.dma.fn = dw8250_fallback_dma_filter;
 	data->usr_reg = DW_UART_USR;
+	data->pdata = device_get_match_data(p->dev);
 	p->private_data = &data->data;
 
 	data->uart_16550_compatible = device_property_read_bool(dev,
@@ -678,13 +680,29 @@  static const struct dev_pm_ops dw8250_pm_ops = {
 	SET_RUNTIME_PM_OPS(dw8250_runtime_suspend, dw8250_runtime_resume, NULL)
 };
 
+static const struct dw8250_platform_data dw8250_dw_apb = {};
+
+static const struct dw8250_platform_data dw8250_octeon_3860_data = {
+	.quirks = DW_UART_QUIRK_OCTEON,
+};
+
+static const struct dw8250_platform_data dw8250_armada_38x_data = {
+	.quirks = DW_UART_QUIRK_ARMADA_38X,
+};
+
+static const struct dw8250_platform_data dw8250_renesas_rzn1_data = {};
+
+static const struct dw8250_platform_data dw8250_starfive_jh7100_data = {
+	.quirks = DW_UART_QUIRK_SKIP_SET_RATE,
+};
+
 static const struct of_device_id dw8250_of_match[] = {
-	{ .compatible = "snps,dw-apb-uart" },
-	{ .compatible = "cavium,octeon-3860-uart", .data = (void *)DW_UART_QUIRK_OCTEON },
-	{ .compatible = "marvell,armada-38x-uart", .data = (void *)DW_UART_QUIRK_ARMADA_38X },
-	{ .compatible = "renesas,rzn1-uart" },
-	{ .compatible = "starfive,jh7100-hsuart",  .data = (void *)DW_UART_QUIRK_SKIP_SET_RATE },
-	{ .compatible = "starfive,jh7100-uart",    .data = (void *)DW_UART_QUIRK_SKIP_SET_RATE },
+	{ .compatible = "snps,dw-apb-uart", .data = &dw8250_dw_apb },
+	{ .compatible = "cavium,octeon-3860-uart", .data = &dw8250_octeon_3860_data },
+	{ .compatible = "marvell,armada-38x-uart", .data = &dw8250_armada_38x_data },
+	{ .compatible = "renesas,rzn1-uart", .data = &dw8250_renesas_rzn1_data },
+	{ .compatible = "starfive,jh7100-hsuart", .data = &dw8250_starfive_jh7100_data },
+	{ .compatible = "starfive,jh7100-uart", .data = &dw8250_starfive_jh7100_data },
 	{ /* Sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, dw8250_of_match);
diff --git a/drivers/tty/serial/8250/8250_dwlib.h b/drivers/tty/serial/8250/8250_dwlib.h
index 72e7dbcccad0..68bb81bee660 100644
--- a/drivers/tty/serial/8250/8250_dwlib.h
+++ b/drivers/tty/serial/8250/8250_dwlib.h
@@ -21,8 +21,13 @@  struct dw8250_port_data {
 	u8			dlf_size;
 };
 
+struct dw8250_platform_data {
+	unsigned int quirks;
+};
+
 struct dw8250_data {
 	struct dw8250_port_data	data;
+	const struct dw8250_platform_data *pdata;
 
 	u8			usr_reg;
 	int			msr_mask_on;