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Date: Fri, 18 Nov 2022 14:15:50 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Bartosz Golaszewski <brgl@...ev.pl>,
Andy Gross <agross@...nel.org>,
Bjorn Andersson <andersson@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Jiri Slaby <jirislaby@...nel.org>,
Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
Vinod Koul <vkoul@...nel.org>, Alex Elder <elder@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
linux-serial@...r.kernel.org,
Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH 01/15] tty: serial: qcom-geni-serial: drop unneeded
forward definitions
On 18/11/2022 13:25, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
>
> If we shuffle the code a bit, we can drop all forward definitions of
> various static functions.
>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> ---
Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
Konrad
> drivers/tty/serial/qcom_geni_serial.c | 79 +++++++++++++--------------
> 1 file changed, 37 insertions(+), 42 deletions(-)
>
> diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
> index 83b66b73303a..9f2212e7b5ec 100644
> --- a/drivers/tty/serial/qcom_geni_serial.c
> +++ b/drivers/tty/serial/qcom_geni_serial.c
> @@ -147,11 +147,6 @@ static const struct uart_ops qcom_geni_console_pops;
> static const struct uart_ops qcom_geni_uart_pops;
> static struct uart_driver qcom_geni_console_driver;
> static struct uart_driver qcom_geni_uart_driver;
> -static int handle_rx_console(struct uart_port *uport, u32 bytes, bool drop);
> -static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop);
> -static unsigned int qcom_geni_serial_tx_empty(struct uart_port *port);
> -static void qcom_geni_serial_stop_rx(struct uart_port *uport);
> -static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop);
>
> #define to_dev_port(ptr, member) \
> container_of(ptr, struct qcom_geni_serial_port, member)
> @@ -590,6 +585,11 @@ static int handle_rx_uart(struct uart_port *uport, u32 bytes, bool drop)
> return ret;
> }
>
> +static unsigned int qcom_geni_serial_tx_empty(struct uart_port *uport)
> +{
> + return !readl(uport->membase + SE_GENI_TX_FIFO_STATUS);
> +}
> +
> static void qcom_geni_serial_start_tx(struct uart_port *uport)
> {
> u32 irq_en;
> @@ -635,25 +635,29 @@ static void qcom_geni_serial_stop_tx(struct uart_port *uport)
> writel(M_CMD_CANCEL_EN, uport->membase + SE_GENI_M_IRQ_CLEAR);
> }
>
> -static void qcom_geni_serial_start_rx(struct uart_port *uport)
> +static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop)
> {
> - u32 irq_en;
> u32 status;
> + u32 word_cnt;
> + u32 last_word_byte_cnt;
> + u32 last_word_partial;
> + u32 total_bytes;
> struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
>
> - status = readl(uport->membase + SE_GENI_STATUS);
> - if (status & S_GENI_CMD_ACTIVE)
> - qcom_geni_serial_stop_rx(uport);
> -
> - geni_se_setup_s_cmd(&port->se, UART_START_READ, 0);
> -
> - irq_en = readl(uport->membase + SE_GENI_S_IRQ_EN);
> - irq_en |= S_RX_FIFO_WATERMARK_EN | S_RX_FIFO_LAST_EN;
> - writel(irq_en, uport->membase + SE_GENI_S_IRQ_EN);
> + status = readl(uport->membase + SE_GENI_RX_FIFO_STATUS);
> + word_cnt = status & RX_FIFO_WC_MSK;
> + last_word_partial = status & RX_LAST;
> + last_word_byte_cnt = (status & RX_LAST_BYTE_VALID_MSK) >>
> + RX_LAST_BYTE_VALID_SHFT;
>
> - irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN);
> - irq_en |= M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN;
> - writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN);
> + if (!word_cnt)
> + return;
> + total_bytes = BYTES_PER_FIFO_WORD * (word_cnt - 1);
> + if (last_word_partial && last_word_byte_cnt)
> + total_bytes += last_word_byte_cnt;
> + else
> + total_bytes += BYTES_PER_FIFO_WORD;
> + port->handle_rx(uport, total_bytes, drop);
> }
>
> static void qcom_geni_serial_stop_rx(struct uart_port *uport)
> @@ -694,29 +698,25 @@ static void qcom_geni_serial_stop_rx(struct uart_port *uport)
> qcom_geni_serial_abort_rx(uport);
> }
>
> -static void qcom_geni_serial_handle_rx(struct uart_port *uport, bool drop)
> +static void qcom_geni_serial_start_rx(struct uart_port *uport)
> {
> + u32 irq_en;
> u32 status;
> - u32 word_cnt;
> - u32 last_word_byte_cnt;
> - u32 last_word_partial;
> - u32 total_bytes;
> struct qcom_geni_serial_port *port = to_dev_port(uport, uport);
>
> - status = readl(uport->membase + SE_GENI_RX_FIFO_STATUS);
> - word_cnt = status & RX_FIFO_WC_MSK;
> - last_word_partial = status & RX_LAST;
> - last_word_byte_cnt = (status & RX_LAST_BYTE_VALID_MSK) >>
> - RX_LAST_BYTE_VALID_SHFT;
> + status = readl(uport->membase + SE_GENI_STATUS);
> + if (status & S_GENI_CMD_ACTIVE)
> + qcom_geni_serial_stop_rx(uport);
>
> - if (!word_cnt)
> - return;
> - total_bytes = BYTES_PER_FIFO_WORD * (word_cnt - 1);
> - if (last_word_partial && last_word_byte_cnt)
> - total_bytes += last_word_byte_cnt;
> - else
> - total_bytes += BYTES_PER_FIFO_WORD;
> - port->handle_rx(uport, total_bytes, drop);
> + geni_se_setup_s_cmd(&port->se, UART_START_READ, 0);
> +
> + irq_en = readl(uport->membase + SE_GENI_S_IRQ_EN);
> + irq_en |= S_RX_FIFO_WATERMARK_EN | S_RX_FIFO_LAST_EN;
> + writel(irq_en, uport->membase + SE_GENI_S_IRQ_EN);
> +
> + irq_en = readl(uport->membase + SE_GENI_M_IRQ_EN);
> + irq_en |= M_RX_FIFO_WATERMARK_EN | M_RX_FIFO_LAST_EN;
> + writel(irq_en, uport->membase + SE_GENI_M_IRQ_EN);
> }
>
> static void qcom_geni_serial_handle_tx(struct uart_port *uport, bool done,
> @@ -1122,11 +1122,6 @@ static void qcom_geni_serial_set_termios(struct uart_port *uport,
> qcom_geni_serial_start_rx(uport);
> }
>
> -static unsigned int qcom_geni_serial_tx_empty(struct uart_port *uport)
> -{
> - return !readl(uport->membase + SE_GENI_TX_FIFO_STATUS);
> -}
> -
> #ifdef CONFIG_SERIAL_QCOM_GENI_CONSOLE
> static int qcom_geni_console_setup(struct console *co, char *options)
> {
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