From 285e76fc049c4d32c772eea9460a7ef28a193802 Mon Sep 17 00:00:00 2001 From: Cosmin Tanislav Date: Sun, 5 Jun 2022 17:46:56 +0300 Subject: [PATCH] serial: max310x: use regmap methods for SPI batch operations The SPI batch read/write operations can be implemented as simple regmap raw read and write, which will also try to do a gather write just as it is done here. Use the regmap raw read and write methods. Reviewed-by: Andy Shevchenko Signed-off-by: Cosmin Tanislav Link: https://lore.kernel.org/r/20220605144659.4169853-2-demonsingur@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/max310x.c | 36 ++++++++---------------------------- 1 file changed, 8 insertions(+), 28 deletions(-) diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index a0b6ea52d133..46887a4ffea4 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -259,8 +259,6 @@ struct max310x_one { struct work_struct md_work; struct work_struct rs_work; - u8 wr_header; - u8 rd_header; u8 rx_buf[MAX310X_FIFO_SIZE]; }; #define to_max310x_port(_port) \ @@ -623,32 +621,18 @@ static u32 max310x_set_ref_clk(struct device *dev, struct max310x_port *s, static void max310x_batch_write(struct uart_port *port, u8 *txbuf, unsigned int len) { - struct max310x_one *one = to_max310x_port(port); - struct spi_transfer xfer[] = { - { - .tx_buf = &one->wr_header, - .len = sizeof(one->wr_header), - }, { - .tx_buf = txbuf, - .len = len, - } - }; - spi_sync_transfer(to_spi_device(port->dev), xfer, ARRAY_SIZE(xfer)); + struct max310x_port *s = dev_get_drvdata(port->dev); + u8 reg = port->iobase + MAX310X_THR_REG; + + regmap_raw_write(s->regmap, reg, txbuf, len); } static void max310x_batch_read(struct uart_port *port, u8 *rxbuf, unsigned int len) { - struct max310x_one *one = to_max310x_port(port); - struct spi_transfer xfer[] = { - { - .tx_buf = &one->rd_header, - .len = sizeof(one->rd_header), - }, { - .rx_buf = rxbuf, - .len = len, - } - }; - spi_sync_transfer(to_spi_device(port->dev), xfer, ARRAY_SIZE(xfer)); + struct max310x_port *s = dev_get_drvdata(port->dev); + u8 reg = port->iobase + MAX310X_RHR_REG; + + regmap_raw_read(s->regmap, reg, rxbuf, len); } static void max310x_handle_rx(struct uart_port *port, unsigned int rxlen) @@ -1368,10 +1352,6 @@ static int max310x_probe(struct device *dev, const struct max310x_devtype *devty INIT_WORK(&s->p[i].md_work, max310x_md_proc); /* Initialize queue for changing RS485 mode */ INIT_WORK(&s->p[i].rs_work, max310x_rs_proc); - /* Initialize SPI-transfer buffers */ - s->p[i].wr_header = (s->p[i].port.iobase + MAX310X_THR_REG) | - MAX310X_WRITE_BIT; - s->p[i].rd_header = (s->p[i].port.iobase + MAX310X_RHR_REG); /* Register port */ ret = uart_add_one_port(&max310x_uart, &s->p[i].port);