From 0b060eefd951fc111ecb77c7b1932b158e6a4f2c Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Thu, 1 Dec 2016 02:06:31 +0100 Subject: [PATCH] serial: 16550: Add Ingenic JZ4780 support Add compatibility string for the Ingenic JZ4780 SoC, the necessary UART enable bit into FCR and register shift. Neither are encoded in the DTS coming from Linux, so we need to support it this way. Signed-off-by: Marek Vasut Cc: Tom Rini Cc: Simon Glass Cc: Daniel Schwierzeck Cc: Paul Burton Reviewed-by: Simon Glass --- drivers/serial/ns16550.c | 5 +++++ include/ns16550.h | 3 +++ 2 files changed, 8 insertions(+) diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c index 3130a1d16a..9b423a591d 100644 --- a/drivers/serial/ns16550.c +++ b/drivers/serial/ns16550.c @@ -363,6 +363,7 @@ int ns16550_serial_probe(struct udevice *dev) #if CONFIG_IS_ENABLED(OF_CONTROL) enum { PORT_NS16550 = 0, + PORT_JZ4780, }; #endif @@ -370,6 +371,7 @@ enum { int ns16550_serial_ofdata_to_platdata(struct udevice *dev) { struct ns16550_platdata *plat = dev->platdata; + const u32 port_type = dev_get_driver_data(dev); fdt_addr_t addr; struct clk clk; int err; @@ -439,6 +441,8 @@ int ns16550_serial_ofdata_to_platdata(struct udevice *dev) } plat->fcr = UART_FCRVAL; + if (port_type == PORT_JZ4780) + plat->fcr |= UART_FCR_UME; return 0; } @@ -461,6 +465,7 @@ const struct dm_serial_ops ns16550_serial_ops = { static const struct udevice_id ns16550_serial_ids[] = { { .compatible = "ns16550", .data = PORT_NS16550 }, { .compatible = "ns16550a", .data = PORT_NS16550 }, + { .compatible = "ingenic,jz4780-uart", .data = PORT_JZ4780 }, { .compatible = "nvidia,tegra20-uart", .data = PORT_NS16550 }, { .compatible = "snps,dw-apb-uart", .data = PORT_NS16550 }, { .compatible = "ti,omap2-uart", .data = PORT_NS16550 }, diff --git a/include/ns16550.h b/include/ns16550.h index 45fd68b65d..7c97036831 100644 --- a/include/ns16550.h +++ b/include/ns16550.h @@ -118,6 +118,9 @@ typedef struct NS16550 *NS16550_t; #define UART_FCR_RXSR 0x02 /* Receiver soft reset */ #define UART_FCR_TXSR 0x04 /* Transmitter soft reset */ +/* Ingenic JZ47xx specific UART-enable bit. */ +#define UART_FCR_UME 0x10 + /* * These are the definitions for the Modem Control Register */ -- 2.30.2