diff options
author | Emil Renner Berthing <kernel@esmil.dk> | 2022-04-22 20:06:08 +0200 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-26 13:25:46 +0200 |
commit | 4a218b277fdba357d8e9022ae675c94e59d64b4e (patch) | |
tree | e5d38f5c1fd1a7e375e423b13f20a661dd609eae | |
parent | d9666dfb314e1ffd6eb9c3c4243fe3e094c047a7 (diff) | |
download | linux-4a218b277fdba357d8e9022ae675c94e59d64b4e.tar.bz2 |
serial: 8250: dw: Create a generic platform data structure
Use device tree match data rather than multiple calls to
of_device_is_compatible() by introducing a platform data structure and
adding a quirks mask.
Provide a stub to the compatibles without quirks to simplify the
handling of the upcoming changes.
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
[<miquel.raynal@bootlin.com: Minor changes + creation of a real pdata structure]
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20220422180615.9098-3-miquel.raynal@bootlin.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r-- | drivers/tty/serial/8250/8250_dw.c | 42 | ||||
-rw-r--r-- | drivers/tty/serial/8250/8250_dwlib.h | 5 |
2 files changed, 39 insertions, 8 deletions
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index dcbe54ccd16b..7fdb2683f534 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> @@ -37,6 +38,11 @@ /* DesignWare specific register fields */ #define DW_UART_MCR_SIRE BIT(6) +/* Quirks */ +#define DW_UART_QUIRK_OCTEON BIT(0) +#define DW_UART_QUIRK_ARMADA_38X BIT(1) +#define DW_UART_QUIRK_SKIP_SET_RATE BIT(2) + static inline struct dw8250_data *clk_to_dw8250_data(struct notifier_block *nb) { return container_of(nb, struct dw8250_data, clk_notifier); @@ -366,6 +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 int quirks = data->pdata->quirks; if (np) { int id; @@ -375,7 +382,7 @@ static void dw8250_quirks(struct uart_port *p, struct dw8250_data *data) if (id >= 0) p->line = id; #ifdef CONFIG_64BIT - if (of_device_is_compatible(np, "cavium,octeon-3860-uart")) { + if (quirks & DW_UART_QUIRK_OCTEON) { p->serial_in = dw8250_serial_inq; p->serial_out = dw8250_serial_outq; p->flags = UPF_SKIP_TEST | UPF_SHARE_IRQ | UPF_FIXED_TYPE; @@ -391,9 +398,9 @@ static void dw8250_quirks(struct uart_port *p, struct dw8250_data *data) p->serial_out = dw8250_serial_out32be; } - if (of_device_is_compatible(np, "marvell,armada-38x-uart")) + if (quirks & DW_UART_QUIRK_ARMADA_38X) p->serial_out = dw8250_serial_out38x; - if (of_device_is_compatible(np, "starfive,jh7100-uart")) + if (quirks & DW_UART_QUIRK_SKIP_SET_RATE) p->set_termios = dw8250_do_set_termios; } else if (acpi_dev_present("APMC0D08", NULL, -1)) { @@ -456,6 +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, @@ -672,12 +680,30 @@ 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" }, - { .compatible = "marvell,armada-38x-uart" }, - { .compatible = "renesas,rzn1-uart" }, - { .compatible = "starfive,jh7100-uart" }, + { .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-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; |