pinctrl: rockchip: constify mux recalced and route data arrays

The mux_recalced_data and mux_route_data arrays are never modified after
initialization. Mark them const so they can be placed in read-only
memory. Also constify the corresponding struct fields in
rockchip_pin_ctrl and local pointer variables.

This is inspired by review comments on Dmitry Yashin's earlier
RK3308B series [1].

[1] https://lore.kernel.org/all/20240515121634.23945-1-dmt.yashin@gmail.com/

Signed-off-by: Hugo VALTIER <hugo@ahdrone.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>

2 files changed, 19 insertions, 19 deletions

diff --git a/drivers/pinctrl/pinctrl-rockchip.c b/drivers/pinctrl/pinctrl-rockchip.c
index 7e0fcd45fd26..849e72f1832c 100644
--- a/drivers/pinctrl/pinctrl-rockchip.c
+++ b/drivers/pinctrl/pinctrl-rockchip.c
@@ -483,7 +483,7 @@ static struct rockchip_mux_recalced_data rv1103b_mux_recalced_data[] = {
 	},
 };
 
-static struct rockchip_mux_recalced_data rv1108_mux_recalced_data[] = {
+static const struct rockchip_mux_recalced_data rv1108_mux_recalced_data[] = {
 	{
 		.num = 1,
 		.pin = 0,
@@ -547,7 +547,7 @@ static struct rockchip_mux_recalced_data rv1108_mux_recalced_data[] = {
 	},
 };
 
-static struct rockchip_mux_recalced_data rv1126_mux_recalced_data[] = {
+static const struct rockchip_mux_recalced_data rv1126_mux_recalced_data[] = {
 	{
 		.num = 0,
 		.pin = 20,
@@ -578,7 +578,7 @@ static struct rockchip_mux_recalced_data rv1126_mux_recalced_data[] = {
 	},
 };
 
-static  struct rockchip_mux_recalced_data rk3128_mux_recalced_data[] = {
+static const struct rockchip_mux_recalced_data rk3128_mux_recalced_data[] = {
 	{
 		.num = 2,
 		.pin = 20,
@@ -612,7 +612,7 @@ static  struct rockchip_mux_recalced_data rk3128_mux_recalced_data[] = {
 	},
 };
 
-static struct rockchip_mux_recalced_data rk3308_mux_recalced_data[] = {
+static const struct rockchip_mux_recalced_data rk3308_mux_recalced_data[] = {
 	{
 		/* gpio1b6_sel */
 		.num = 1,
@@ -721,7 +721,7 @@ static struct rockchip_mux_recalced_data rk3308_mux_recalced_data[] = {
 	},
 };
 
-static struct rockchip_mux_recalced_data rk3328_mux_recalced_data[] = {
+static const struct rockchip_mux_recalced_data rk3328_mux_recalced_data[] = {
 	{
 		/* gpio2_b7_sel */
 		.num = 2,
@@ -793,7 +793,7 @@ static void rockchip_get_recalced_mux(struct rockchip_pin_bank *bank, int pin,
 {
 	struct rockchip_pinctrl *info = bank->drvdata;
 	struct rockchip_pin_ctrl *ctrl = info->ctrl;
-	struct rockchip_mux_recalced_data *data;
+	const struct rockchip_mux_recalced_data *data;
 	int i;
 
 	for (i = 0; i < ctrl->niomux_recalced; i++) {
@@ -811,7 +811,7 @@ static void rockchip_get_recalced_mux(struct rockchip_pin_bank *bank, int pin,
 	*bit = data->bit;
 }
 
-static struct rockchip_mux_route_data px30_mux_route_data[] = {
+static const struct rockchip_mux_route_data px30_mux_route_data[] = {
 	RK_MUXROUTE_SAME(2, RK_PB4, 1, 0x184, BIT(16 + 7)), /* cif-d0m0 */
 	RK_MUXROUTE_SAME(3, RK_PA1, 3, 0x184, BIT(16 + 7) | BIT(7)), /* cif-d0m1 */
 	RK_MUXROUTE_SAME(2, RK_PB6, 1, 0x184, BIT(16 + 7)), /* cif-d1m0 */
@@ -862,7 +862,7 @@ static struct rockchip_mux_route_data px30_mux_route_data[] = {
 	RK_MUXROUTE_SAME(1, RK_PB5, 2, 0x184, BIT(16 + 9) | BIT(9)), /* uart3-rtsm1 */
 };
 
-static struct rockchip_mux_route_data rv1126_mux_route_data[] = {
+static const struct rockchip_mux_route_data rv1126_mux_route_data[] = {
 	RK_MUXROUTE_GRF(3, RK_PD2, 1, 0x10260, WRITE_MASK_VAL(0, 0, 0)), /* I2S0_MCLK_M0 */
 	RK_MUXROUTE_GRF(3, RK_PB0, 3, 0x10260, WRITE_MASK_VAL(0, 0, 1)), /* I2S0_MCLK_M1 */
 
@@ -959,7 +959,7 @@ static struct rockchip_mux_route_data rv1126_mux_route_data[] = {
 	RK_MUXROUTE_PMU(1, RK_PD0, 5, 0x0118, WRITE_MASK_VAL(2, 2, 1)), /* UART1_TX_M1 */
 };
 
-static struct rockchip_mux_route_data rk3128_mux_route_data[] = {
+static const struct rockchip_mux_route_data rk3128_mux_route_data[] = {
 	RK_MUXROUTE_SAME(1, RK_PB2, 1, 0x144, BIT(16 + 3) | BIT(16 + 4)), /* spi-0 */
 	RK_MUXROUTE_SAME(1, RK_PD3, 3, 0x144, BIT(16 + 3) | BIT(16 + 4) | BIT(3)), /* spi-1 */
 	RK_MUXROUTE_SAME(0, RK_PB5, 2, 0x144, BIT(16 + 3) | BIT(16 + 4) | BIT(4)), /* spi-2 */
@@ -969,12 +969,12 @@ static struct rockchip_mux_route_data rk3128_mux_route_data[] = {
 	RK_MUXROUTE_SAME(2, RK_PA4, 2, 0x144, BIT(16 + 6) | BIT(6)), /* emmc-1 */
 };
 
-static struct rockchip_mux_route_data rk3188_mux_route_data[] = {
+static const struct rockchip_mux_route_data rk3188_mux_route_data[] = {
 	RK_MUXROUTE_SAME(0, RK_PD0, 1, 0xa0, BIT(16 + 11)), /* non-iomuxed emmc/flash pins on flash-dqs */
 	RK_MUXROUTE_SAME(0, RK_PD0, 2, 0xa0, BIT(16 + 11) | BIT(11)), /* non-iomuxed emmc/flash pins on emmc-clk */
 };
 
-static struct rockchip_mux_route_data rk3228_mux_route_data[] = {
+static const struct rockchip_mux_route_data rk3228_mux_route_data[] = {
 	RK_MUXROUTE_SAME(0, RK_PD2, 1, 0x50, BIT(16)), /* pwm0-0 */
 	RK_MUXROUTE_SAME(3, RK_PC5, 1, 0x50, BIT(16) | BIT(0)), /* pwm0-1 */
 	RK_MUXROUTE_SAME(0, RK_PD3, 1, 0x50, BIT(16 + 1)), /* pwm1-0 */
@@ -995,12 +995,12 @@ static struct rockchip_mux_route_data rk3228_mux_route_data[] = {
 	RK_MUXROUTE_SAME(3, RK_PB5, 1, 0x50, BIT(16 + 11) | BIT(11)), /* uart1-1_rx */
 };
 
-static struct rockchip_mux_route_data rk3288_mux_route_data[] = {
+static const struct rockchip_mux_route_data rk3288_mux_route_data[] = {
 	RK_MUXROUTE_SAME(7, RK_PC0, 2, 0x264, BIT(16 + 12) | BIT(12)), /* edphdmi_cecinoutt1 */
 	RK_MUXROUTE_SAME(7, RK_PC7, 4, 0x264, BIT(16 + 12)), /* edphdmi_cecinout */
 };
 
-static struct rockchip_mux_route_data rk3308_mux_route_data[] = {
+static const struct rockchip_mux_route_data rk3308_mux_route_data[] = {
 	RK_MUXROUTE_SAME(0, RK_PC3, 1, 0x314, BIT(16 + 0) | BIT(0)), /* rtc_clk */
 	RK_MUXROUTE_SAME(1, RK_PC6, 2, 0x314, BIT(16 + 2) | BIT(16 + 3)), /* uart2_rxm0 */
 	RK_MUXROUTE_SAME(4, RK_PD2, 2, 0x314, BIT(16 + 2) | BIT(16 + 3) | BIT(2)), /* uart2_rxm1 */
@@ -1016,7 +1016,7 @@ static struct rockchip_mux_route_data rk3308_mux_route_data[] = {
 	RK_MUXROUTE_SAME(2, RK_PA4, 3, 0x600, BIT(16 + 2) | BIT(2)), /* pdm-clkm-m2 */
 };
 
-static struct rockchip_mux_route_data rk3328_mux_route_data[] = {
+static const struct rockchip_mux_route_data rk3328_mux_route_data[] = {
 	RK_MUXROUTE_SAME(1, RK_PA1, 2, 0x50, BIT(16) | BIT(16 + 1)), /* uart2dbg_rxm0 */
 	RK_MUXROUTE_SAME(2, RK_PA1, 1, 0x50, BIT(16) | BIT(16 + 1) | BIT(0)), /* uart2dbg_rxm1 */
 	RK_MUXROUTE_SAME(1, RK_PB3, 2, 0x50, BIT(16 + 2) | BIT(2)), /* gmac-m1_rxd0 */
@@ -1031,7 +1031,7 @@ static struct rockchip_mux_route_data rk3328_mux_route_data[] = {
 	RK_MUXROUTE_SAME(2, RK_PC0, 4, 0x50, BIT(16 + 9) | BIT(9)), /* cif_data5m1 */
 };
 
-static struct rockchip_mux_route_data rk3399_mux_route_data[] = {
+static const struct rockchip_mux_route_data rk3399_mux_route_data[] = {
 	RK_MUXROUTE_SAME(4, RK_PB0, 2, 0xe21c, BIT(16 + 10) | BIT(16 + 11)), /* uart2dbga_rx */
 	RK_MUXROUTE_SAME(4, RK_PC0, 2, 0xe21c, BIT(16 + 10) | BIT(16 + 11) | BIT(10)), /* uart2dbgb_rx */
 	RK_MUXROUTE_SAME(4, RK_PC3, 1, 0xe21c, BIT(16 + 10) | BIT(16 + 11) | BIT(11)), /* uart2dbgc_rx */
@@ -1039,7 +1039,7 @@ static struct rockchip_mux_route_data rk3399_mux_route_data[] = {
 	RK_MUXROUTE_SAME(4, RK_PD0, 1, 0xe21c, BIT(16 + 14) | BIT(14)), /* pcie_clkreqnb */
 };
 
-static struct rockchip_mux_route_data rk3568_mux_route_data[] = {
+static const struct rockchip_mux_route_data rk3568_mux_route_data[] = {
 	RK_MUXROUTE_PMU(0, RK_PB7, 1, 0x0110, WRITE_MASK_VAL(1, 0, 0)), /* PWM0 IO mux M0 */
 	RK_MUXROUTE_PMU(0, RK_PC7, 2, 0x0110, WRITE_MASK_VAL(1, 0, 1)), /* PWM0 IO mux M1 */
 	RK_MUXROUTE_PMU(0, RK_PC0, 1, 0x0110, WRITE_MASK_VAL(3, 2, 0)), /* PWM1 IO mux M0 */
@@ -1140,7 +1140,7 @@ static bool rockchip_get_mux_route(struct rockchip_pin_bank *bank, int pin,
 {
 	struct rockchip_pinctrl *info = bank->drvdata;
 	struct rockchip_pin_ctrl *ctrl = info->ctrl;
-	struct rockchip_mux_route_data *data;
+	const struct rockchip_mux_route_data *data;
 	int i;
 
 	for (i = 0; i < ctrl->niomux_routes; i++) {
diff --git a/drivers/pinctrl/pinctrl-rockchip.h b/drivers/pinctrl/pinctrl-rockchip.h
index bb0e803e3b8a..dd07a16f615c 100644
--- a/drivers/pinctrl/pinctrl-rockchip.h
+++ b/drivers/pinctrl/pinctrl-rockchip.h
@@ -400,9 +400,9 @@ struct rockchip_pin_ctrl {
 	int				pmu_mux_offset;
 	int				grf_drv_offset;
 	int				pmu_drv_offset;
-	struct rockchip_mux_recalced_data *iomux_recalced;
+	const struct rockchip_mux_recalced_data *iomux_recalced;
 	u32				niomux_recalced;
-	struct rockchip_mux_route_data *iomux_routes;
+	const struct rockchip_mux_route_data *iomux_routes;
 	u32				niomux_routes;
 
 	int	(*pull_calc_reg)(struct rockchip_pin_bank *bank,