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Commit 53d0a062 authored by Krishna Yarlagadda's avatar Krishna Yarlagadda Committed by Greg Kroah-Hartman
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serial: tegra: set maximum num of uart ports to 8 



Set maximum number of UART ports to 8 as older chips have 5 ports and
Tergra186 and later chips will have 8 ports. Add this info to chip
data. Read device tree compatible of this driver and register uart
driver with max ports of matching chip data.

Signed-off-by: default avatarShardar Shariff Md <smohammed@nvidia.com>
Signed-off-by: default avatarKrishna Yarlagadda <kyarlagadda@nvidia.com>
Link: https://lore.kernel.org/r/1567572187-29820-8-git-send-email-kyarlagadda@nvidia.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 222dcdff

drivers/tty/serial/serial-tegra.c

+17 −2
Original line number Diff line number Diff line
@@ -62,7 +62,7 @@ 
#define TEGRA_UART_TX_TRIG_4B			0x20

#define TEGRA_UART_TX_TRIG_1B			0x30



#define TEGRA_UART_MAXIMUM			5

#define TEGRA_UART_MAXIMUM			8



/* Default UART setting when started: 115200 no parity, stop, 8 data bits */

#define TEGRA_UART_DEFAULT_BAUD			115200
@@ -87,6 +87,7 @@ struct tegra_uart_chip_data { 
	bool	allow_txfifo_reset_fifo_mode;

	bool	support_clk_src_div;

	bool	fifo_mode_enable_status;

	int	uart_max_port;

};



struct tegra_uart_port {
@@ -1322,6 +1323,7 @@ static struct tegra_uart_chip_data tegra20_uart_chip_data = { 
	.allow_txfifo_reset_fifo_mode	= true,

	.support_clk_src_div		= false,

	.fifo_mode_enable_status	= false,

	.uart_max_port			= 5,

};



static struct tegra_uart_chip_data tegra30_uart_chip_data = {
@@ -1329,6 +1331,7 @@ static struct tegra_uart_chip_data tegra30_uart_chip_data = { 
	.allow_txfifo_reset_fifo_mode	= false,

	.support_clk_src_div		= true,

	.fifo_mode_enable_status	= false,

	.uart_max_port			= 5,

};



static struct tegra_uart_chip_data tegra186_uart_chip_data = {
@@ -1336,6 +1339,7 @@ static struct tegra_uart_chip_data tegra186_uart_chip_data = { 
	.allow_txfifo_reset_fifo_mode	= false,

	.support_clk_src_div		= true,

	.fifo_mode_enable_status	= true,

	.uart_max_port			= 8,

};



static const struct of_device_id tegra_uart_of_match[] = {
@@ -1468,6 +1472,17 @@ static struct platform_driver tegra_uart_platform_driver = { 
static int __init tegra_uart_init(void)

{

	int ret;

	struct device_node *node;

	const struct of_device_id *match = NULL;

	const struct tegra_uart_chip_data *cdata = NULL;



	node = of_find_matching_node(NULL, tegra_uart_of_match);

	if (node)

		match = of_match_node(tegra_uart_of_match, node);

	if (match)

		cdata = match->data;

	if (cdata)

		tegra_uart_driver.nr = cdata->uart_max_port;



	ret = uart_register_driver(&tegra_uart_driver);

	if (ret < 0) {