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Subject[PATCH 4.19 57/97] tty: serial: qcom_geni_serial: Remove set_rfr_wm() and related variables
Date
From: Ryan Case <ryandcase@chromium.org>

[ Upstream commit a85fb9ce1fab34a3216fd4d769fede643dbc68d4 ]

The variables of tx_wm and rx_wm were set to the same define value in
all cases, never updated, and the define was sometimes used
interchangably. Remove the variables/function and use the fixed value.

Signed-off-by: Ryan Case <ryandcase@chromium.org>
Reviewed-by: Evan Green <evgreen@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/tty/serial/qcom_geni_serial.c | 25 ++++---------------------
1 file changed, 4 insertions(+), 21 deletions(-)

diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 4824869a4080d..080fa1d1ecbfd 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -85,7 +85,7 @@
#define DEF_FIFO_DEPTH_WORDS 16
#define DEF_TX_WM 2
#define DEF_FIFO_WIDTH_BITS 32
-#define UART_CONSOLE_RX_WM 2
+#define UART_RX_WM 2
#define MAX_LOOPBACK_CFG 3

#ifdef CONFIG_CONSOLE_POLL
@@ -101,9 +101,6 @@ struct qcom_geni_serial_port {
u32 tx_fifo_depth;
u32 tx_fifo_width;
u32 rx_fifo_depth;
- u32 tx_wm;
- u32 rx_wm;
- u32 rx_rfr;
enum geni_se_xfer_mode xfer_mode;
bool setup;
int (*handle_rx)(struct uart_port *uport, u32 bytes, bool drop);
@@ -361,9 +358,7 @@ static int qcom_geni_serial_get_char(struct uart_port *uport)
static void qcom_geni_serial_poll_put_char(struct uart_port *uport,
unsigned char c)
{
- struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
-
- writel(port->tx_wm, uport->membase + SE_GENI_TX_WATERMARK_REG);
+ writel(DEF_TX_WM, uport->membase + SE_GENI_TX_WATERMARK_REG);
qcom_geni_serial_setup_tx(uport, 1);
WARN_ON(!qcom_geni_serial_poll_bit(uport, SE_GENI_M_IRQ_STATUS,
M_TX_FIFO_WATERMARK_EN, true));
@@ -571,7 +566,7 @@ static void qcom_geni_serial_start_tx(struct uart_port *uport)
irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN);
irq_en |= M_TX_FIFO_WATERMARK_EN | M_CMD_DONE_EN;

- writel(port->tx_wm, uport->membase +
+ writel(DEF_TX_WM, uport->membase +
SE_GENI_TX_WATERMARK_REG);
writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN);
}
@@ -840,17 +835,6 @@ static void get_tx_fifo_size(struct qcom_geni_serial_port *port)
(port->tx_fifo_depth * port->tx_fifo_width) / BITS_PER_BYTE;
}

-static void set_rfr_wm(struct qcom_geni_serial_port *port)
-{
- /*
- * Set RFR (Flow off) to FIFO_DEPTH - 2.
- * RX WM level at 10% RX_FIFO_DEPTH.
- * TX WM level at 10% TX_FIFO_DEPTH.
- */
- port->rx_rfr = port->rx_fifo_depth - 2;
- port->rx_wm = UART_CONSOLE_RX_WM;
- port->tx_wm = DEF_TX_WM;
-}

static void qcom_geni_serial_shutdown(struct uart_port *uport)
{
@@ -889,7 +873,6 @@ static int qcom_geni_serial_port_setup(struct uart_port *uport)

get_tx_fifo_size(port);

- set_rfr_wm(port);
writel(rxstale, uport->membase + SE_UART_RX_STALE_CNT);
/*
* Make an unconditional cancel on the main sequencer to reset
@@ -902,7 +885,7 @@ static int qcom_geni_serial_port_setup(struct uart_port *uport)
false, true, false);
geni_se_config_packing(&port->se, BITS_PER_BYTE, port->rx_bytes_pw,
false, false, true);
- geni_se_init(&port->se, port->rx_wm, port->rx_rfr);
+ geni_se_init(&port->se, UART_RX_WM, port->rx_fifo_depth - 2);
geni_se_select_mode(&port->se, port->xfer_mode);
if (!uart_console(uport)) {
port->rx_fifo = devm_kcalloc(uport->dev,
--
2.20.1


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