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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: Shardar Shariff Md <smohammed@nvidia.com>
Signed-off-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
Link: https://lore.kernel.org/r/1567572187-29820-8-git-send-email-kyarlagadda@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
alistair/sunxi64-5.4-dsi
Krishna Yarlagadda 2019-09-04 10:13:02 +05:30 committed by Greg Kroah-Hartman
parent 222dcdff34
commit 53d0a062cb
1 changed files with 17 additions and 2 deletions
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19
drivers/tty/serial/serial-tegra.c
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@ -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[] = {
@ -1468,11 +1472,22 @@ 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) {
pr_err("Could not register %s driver\n",
tegra_uart_driver.driver_name);
tegra_uart_driver.driver_name);
return ret;
}