tty: serial: samsung: constify s3c24xx_serial_drv_data

The driver data (struct s3c24xx_serial_drv_data) is only used to
initialize the driver properly and is not modified.  Make it const.

Tested-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Link: https://lore.kernel.org/r/20220308080919.152715-5-krzysztof.kozlowski@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 5078881ee28441badcfced37ec905ef3edbc144f..c7824b80a4bf4245cec6479cdb802660bc296334 100644 (file)
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -136,14 +136,14 @@ struct s3c24xx_uart_port {
        unsigned int                    tx_mode;
        unsigned int                    rx_mode;
 
-       struct s3c24xx_uart_info        *info;
+       const struct s3c24xx_uart_info  *info;
        struct clk                      *clk;
        struct clk                      *baudclk;
        struct uart_port                port;
-       struct s3c24xx_serial_drv_data  *drv_data;
+       const struct s3c24xx_serial_drv_data    *drv_data;
 
        /* reference to platform data */
-       struct s3c2410_uartcfg          *cfg;
+       const struct s3c2410_uartcfg    *cfg;
 
        struct s3c24xx_uart_dma         *dma;
 
@@ -221,7 +221,7 @@ static inline void s3c24xx_clear_bit(struct uart_port *port, int idx,
        local_irq_restore(flags);
 }
 
-static inline struct s3c24xx_uart_port *to_ourport(struct uart_port *port)
+static inline struct s3c24xx_uart_port *to_ourport(const struct uart_port *port)
 {
        return container_of(port, struct s3c24xx_uart_port, port);
 }
@@ -573,13 +573,13 @@ static void s3c24xx_serial_stop_rx(struct uart_port *port)
        }
 }
 
-static inline struct s3c24xx_uart_info
+static inline const struct s3c24xx_uart_info
        *s3c24xx_port_to_info(struct uart_port *port)
 {
        return to_ourport(port)->info;
 }
 
-static inline struct s3c2410_uartcfg
+static inline const struct s3c2410_uartcfg
        *s3c24xx_port_to_cfg(struct uart_port *port)
 {
        struct s3c24xx_uart_port *ourport;
@@ -594,7 +594,7 @@ static inline struct s3c2410_uartcfg
 static int s3c24xx_serial_rx_fifocnt(struct s3c24xx_uart_port *ourport,
                                     unsigned long ufstat)
 {
-       struct s3c24xx_uart_info *info = ourport->info;
+       const struct s3c24xx_uart_info *info = ourport->info;
 
        if (ufstat & info->rx_fifofull)
                return ourport->port.fifosize;
@@ -983,7 +983,7 @@ static irqreturn_t apple_serial_handle_irq(int irq, void *id)
 
 static unsigned int s3c24xx_serial_tx_empty(struct uart_port *port)
 {
-       struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
+       const struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
        unsigned long ufstat = rd_regl(port, S3C2410_UFSTAT);
        unsigned long ufcon = rd_regl(port, S3C2410_UFCON);
 
@@ -1402,7 +1402,7 @@ static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level,
 
 static inline int s3c24xx_serial_getsource(struct uart_port *port)
 {
-       struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
+       const struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
        unsigned int ucon;
 
        if (info->num_clks == 1)
@@ -1416,7 +1416,7 @@ static inline int s3c24xx_serial_getsource(struct uart_port *port)
 static void s3c24xx_serial_setsource(struct uart_port *port,
                        unsigned int clk_sel)
 {
-       struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
+       const struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
        unsigned int ucon;
 
        if (info->num_clks == 1)
@@ -1435,7 +1435,7 @@ static unsigned int s3c24xx_serial_getclk(struct s3c24xx_uart_port *ourport,
                        unsigned int req_baud, struct clk **best_clk,
                        unsigned int *clk_num)
 {
-       struct s3c24xx_uart_info *info = ourport->info;
+       const struct s3c24xx_uart_info *info = ourport->info;
        struct clk *clk;
        unsigned long rate;
        unsigned int cnt, baud, quot, best_quot = 0;
@@ -1519,7 +1519,7 @@ static void s3c24xx_serial_set_termios(struct uart_port *port,
                                       struct ktermios *termios,
                                       struct ktermios *old)
 {
-       struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port);
+       const struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port);
        struct s3c24xx_uart_port *ourport = to_ourport(port);
        struct clk *clk = ERR_PTR(-EINVAL);
        unsigned long flags;
@@ -1688,7 +1688,7 @@ static const char *s3c24xx_serial_type(struct uart_port *port)
 
 static void s3c24xx_serial_config_port(struct uart_port *port, int flags)
 {
-       struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
+       const struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
 
        if (flags & UART_CONFIG_TYPE)
                port->type = info->port_type;
@@ -1700,7 +1700,7 @@ static void s3c24xx_serial_config_port(struct uart_port *port, int flags)
 static int
 s3c24xx_serial_verify_port(struct uart_port *port, struct serial_struct *ser)
 {
-       struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
+       const struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
 
        if (ser->type != PORT_UNKNOWN && ser->type != info->port_type)
                return -EINVAL;
@@ -1870,9 +1870,9 @@ s3c24xx_serial_ports[CONFIG_SERIAL_SAMSUNG_UARTS] = {
  */
 
 static void s3c24xx_serial_resetport(struct uart_port *port,
-                                  struct s3c2410_uartcfg *cfg)
+                                    const struct s3c2410_uartcfg *cfg)
 {
-       struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
+       const struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
        unsigned long ucon = rd_regl(port, S3C2410_UCON);
 
        ucon &= (info->clksel_mask | info->ucon_mask);
@@ -1976,7 +1976,7 @@ s3c24xx_serial_cpufreq_deregister(struct s3c24xx_uart_port *port)
 static int s3c24xx_serial_enable_baudclk(struct s3c24xx_uart_port *ourport)
 {
        struct device *dev = ourport->port.dev;
-       struct s3c24xx_uart_info *info = ourport->info;
+       const struct s3c24xx_uart_info *info = ourport->info;
        char clk_name[MAX_CLK_NAME_LENGTH];
        unsigned int clk_sel;
        struct clk *clk;
@@ -2018,7 +2018,7 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
                                    struct platform_device *platdev)
 {
        struct uart_port *port = &ourport->port;
-       struct s3c2410_uartcfg *cfg = ourport->cfg;
+       const struct s3c2410_uartcfg *cfg = ourport->cfg;
        struct resource *res;
        int ret;
 
@@ -2153,7 +2153,7 @@ static const struct of_device_id s3c24xx_uart_dt_match[];
 
 static int probe_index;
 
-static inline struct s3c24xx_serial_drv_data *
+static inline const struct s3c24xx_serial_drv_data *
 s3c24xx_get_driver_data(struct platform_device *pdev)
 {
 #ifdef CONFIG_OF
@@ -2416,7 +2416,7 @@ static struct uart_port *cons_uart;
 static int
 s3c24xx_serial_console_txrdy(struct uart_port *port, unsigned int ufcon)
 {
-       struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
+       const struct s3c24xx_uart_info *info = s3c24xx_port_to_info(port);
        unsigned long ufstat, utrstat;
 
        if (ufcon & S3C2410_UFCON_FIFOMODE) {
@@ -2612,7 +2612,7 @@ static struct console s3c24xx_serial_console = {
 #endif /* CONFIG_SERIAL_SAMSUNG_CONSOLE */
 
 #ifdef CONFIG_CPU_S3C2410
-static struct s3c24xx_serial_drv_data s3c2410_serial_drv_data = {
+static const struct s3c24xx_serial_drv_data s3c2410_serial_drv_data = {
        .info = {
                .name           = "Samsung S3C2410 UART",
                .type           = TYPE_S3C24XX,
@@ -2640,7 +2640,7 @@ static struct s3c24xx_serial_drv_data s3c2410_serial_drv_data = {
 #endif
 
 #ifdef CONFIG_CPU_S3C2412
-static struct s3c24xx_serial_drv_data s3c2412_serial_drv_data = {
+static const struct s3c24xx_serial_drv_data s3c2412_serial_drv_data = {
        .info = {
                .name           = "Samsung S3C2412 UART",
                .type           = TYPE_S3C24XX,
@@ -2670,7 +2670,7 @@ static struct s3c24xx_serial_drv_data s3c2412_serial_drv_data = {
 
 #if defined(CONFIG_CPU_S3C2440) || defined(CONFIG_CPU_S3C2416) || \
        defined(CONFIG_CPU_S3C2443) || defined(CONFIG_CPU_S3C2442)
-static struct s3c24xx_serial_drv_data s3c2440_serial_drv_data = {
+static const struct s3c24xx_serial_drv_data s3c2440_serial_drv_data = {
        .info = {
                .name           = "Samsung S3C2440 UART",
                .type           = TYPE_S3C24XX,
@@ -2700,7 +2700,7 @@ static struct s3c24xx_serial_drv_data s3c2440_serial_drv_data = {
 #endif
 
 #if defined(CONFIG_CPU_S3C6400) || defined(CONFIG_CPU_S3C6410)
-static struct s3c24xx_serial_drv_data s3c6400_serial_drv_data = {
+static const struct s3c24xx_serial_drv_data s3c6400_serial_drv_data = {
        .info = {
                .name           = "Samsung S3C6400 UART",
                .type           = TYPE_S3C6400,
@@ -2729,7 +2729,7 @@ static struct s3c24xx_serial_drv_data s3c6400_serial_drv_data = {
 #endif
 
 #ifdef CONFIG_CPU_S5PV210
-static struct s3c24xx_serial_drv_data s5pv210_serial_drv_data = {
+static const struct s3c24xx_serial_drv_data s5pv210_serial_drv_data = {
        .info = {
                .name           = "Samsung S5PV210 UART",
                .type           = TYPE_S3C6400,
@@ -2781,17 +2781,17 @@ static struct s3c24xx_serial_drv_data s5pv210_serial_drv_data = {
                .has_fracval    = 1,                            \
        }                                                       \
 
-static struct s3c24xx_serial_drv_data exynos4210_serial_drv_data = {
+static const struct s3c24xx_serial_drv_data exynos4210_serial_drv_data = {
        EXYNOS_COMMON_SERIAL_DRV_DATA(),
        .fifosize = { 256, 64, 16, 16 },
 };
 
-static struct s3c24xx_serial_drv_data exynos5433_serial_drv_data = {
+static const struct s3c24xx_serial_drv_data exynos5433_serial_drv_data = {
        EXYNOS_COMMON_SERIAL_DRV_DATA(),
        .fifosize = { 64, 256, 16, 256 },
 };
 
-static struct s3c24xx_serial_drv_data exynos850_serial_drv_data = {
+static const struct s3c24xx_serial_drv_data exynos850_serial_drv_data = {
        EXYNOS_COMMON_SERIAL_DRV_DATA(),
        .fifosize = { 256, 64, 64, 64 },
 };
@@ -2807,7 +2807,7 @@ static struct s3c24xx_serial_drv_data exynos850_serial_drv_data = {
 #endif
 
 #ifdef CONFIG_ARCH_APPLE
-static struct s3c24xx_serial_drv_data s5l_serial_drv_data = {
+static const struct s3c24xx_serial_drv_data s5l_serial_drv_data = {
        .info = {
                .name           = "Apple S5L UART",
                .type           = TYPE_APPLE_S5L,