diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0733-sc16is7xx-Fix-for-hardware-flow-control.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0733-sc16is7xx-Fix-for-hardware-flow-control.patch | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0733-sc16is7xx-Fix-for-hardware-flow-control.patch b/target/linux/bcm27xx/patches-5.4/950-0733-sc16is7xx-Fix-for-hardware-flow-control.patch deleted file mode 100644 index 3ff77bcea9..0000000000 --- a/target/linux/bcm27xx/patches-5.4/950-0733-sc16is7xx-Fix-for-hardware-flow-control.patch +++ /dev/null @@ -1,70 +0,0 @@ -From 41ed4262b7398a3170399af81cf78cb8d7dd8b8d Mon Sep 17 00:00:00 2001 -From: Phil Elwell <phil@raspberrypi.com> -Date: Wed, 13 May 2020 20:10:15 +0100 -Subject: [PATCH] sc16is7xx: Fix for hardware flow control - -The SC16IS7XX hardware flow control is mishandled by the driver in -a number of ways: - - 1. The set_baud method accidentally clears it when setting EFR bit. - 2. Even though hardware flow control is enabled, it isn't indicated - back to the serial framework. - 3. Applying the flow control clears the EFR bit. - 4. The CTS support is not indicated in the return from - sc16is7xx_get_mctrl. - -Address all of those issues using a mixture of patches found on the -linked pages. - -See: https://github.com/raspberrypi/linux/issues/2542 -See: https://www.spinics.net/lists/linux-serial/msg21794.html - -Signed-off-by: Phil Elwell <phil@raspberrypi.com> ---- - drivers/tty/serial/sc16is7xx.c | 14 ++++++++++---- - 1 file changed, 10 insertions(+), 4 deletions(-) - ---- a/drivers/tty/serial/sc16is7xx.c -+++ b/drivers/tty/serial/sc16is7xx.c -@@ -523,8 +523,9 @@ static int sc16is7xx_set_baud(struct uar - - /* Enable enhanced features */ - regcache_cache_bypass(s->regmap, true); -- sc16is7xx_port_write(port, SC16IS7XX_EFR_REG, -- SC16IS7XX_EFR_ENABLE_BIT); -+ sc16is7xx_port_update(port, SC16IS7XX_EFR_REG, -+ SC16IS7XX_EFR_ENABLE_BIT, -+ SC16IS7XX_EFR_ENABLE_BIT); - regcache_cache_bypass(s->regmap, false); - - /* Put LCR back to the normal mode */ -@@ -846,7 +847,7 @@ static unsigned int sc16is7xx_get_mctrl( - /* DCD and DSR are not wired and CTS/RTS is handled automatically - * so just indicate DSR and CAR asserted - */ -- return TIOCM_DSR | TIOCM_CAR; -+ return TIOCM_DSR | TIOCM_CAR | TIOCM_RI | TIOCM_CTS; - } - - static void sc16is7xx_set_mctrl(struct uart_port *port, unsigned int mctrl) -@@ -933,14 +934,19 @@ static void sc16is7xx_set_termios(struct - regcache_cache_bypass(s->regmap, true); - sc16is7xx_port_write(port, SC16IS7XX_XON1_REG, termios->c_cc[VSTART]); - sc16is7xx_port_write(port, SC16IS7XX_XOFF1_REG, termios->c_cc[VSTOP]); -- if (termios->c_cflag & CRTSCTS) -+ if (termios->c_cflag & CRTSCTS) { - flow |= SC16IS7XX_EFR_AUTOCTS_BIT | - SC16IS7XX_EFR_AUTORTS_BIT; -+ port->status |= UPSTAT_AUTOCTS; -+ }; - if (termios->c_iflag & IXON) - flow |= SC16IS7XX_EFR_SWFLOW3_BIT; - if (termios->c_iflag & IXOFF) - flow |= SC16IS7XX_EFR_SWFLOW1_BIT; - -+ /* Always set enable enhanced */ -+ flow |= SC16IS7XX_EFR_ENABLE_BIT; -+ - sc16is7xx_port_write(port, SC16IS7XX_EFR_REG, flow); - regcache_cache_bypass(s->regmap, false); - |