pinctrl: renesas: rzg2l: Clarify OEN read/write support

We currently support OEN read/write for the RZ/G3S SoC but not the
RZ/G2L SoC family (consisting of RZ/G2L, RZ/G2LC, RZ/G2UL, RZ/V2L &
RZ/Five). The appropriate functions are renamed to clarify this and to
match the callback names.

We should also only set the oen_read and oen_write function pointers for
the devices which support these operations. This requires us to check
that these function pointers are valid before calling them.

Signed-off-by: Paul Barker <paul.barker.ct@bp.renesas.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20240625200316.4282-2-paul.barker.ct@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index a04a4ce4a80e8e28ad9c34c18680976a5a0e1127..cffc8c0106824232b921d906eeb0270298eef3df 100644 (file)
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -999,7 +999,7 @@ static bool rzg2l_ds_is_supported(struct rzg2l_pinctrl *pctrl, u32 caps,
        return false;
 }
 
-static bool rzg2l_oen_is_supported(u32 caps, u8 pin, u8 max_pin)
+static bool rzg3s_oen_is_supported(u32 caps, u8 pin, u8 max_pin)
 {
        if (!(caps & PIN_CFG_OEN))
                return false;
@@ -1010,7 +1010,7 @@ static bool rzg2l_oen_is_supported(u32 caps, u8 pin, u8 max_pin)
        return true;
 }
 
-static u8 rzg2l_pin_to_oen_bit(u32 offset, u8 pin, u8 max_port)
+static u8 rzg3s_pin_to_oen_bit(u32 offset, u8 pin, u8 max_port)
 {
        if (pin)
                pin *= 2;
@@ -1021,31 +1021,31 @@ static u8 rzg2l_pin_to_oen_bit(u32 offset, u8 pin, u8 max_port)
        return pin;
 }
 
-static u32 rzg2l_read_oen(struct rzg2l_pinctrl *pctrl, u32 caps, u32 offset, u8 pin)
+static u32 rzg3s_oen_read(struct rzg2l_pinctrl *pctrl, u32 caps, u32 offset, u8 pin)
 {
        u8 max_port = pctrl->data->hwcfg->oen_max_port;
        u8 max_pin = pctrl->data->hwcfg->oen_max_pin;
        u8 bit;
 
-       if (!rzg2l_oen_is_supported(caps, pin, max_pin))
+       if (!rzg3s_oen_is_supported(caps, pin, max_pin))
                return 0;
 
-       bit = rzg2l_pin_to_oen_bit(offset, pin, max_port);
+       bit = rzg3s_pin_to_oen_bit(offset, pin, max_port);
 
        return !(readb(pctrl->base + ETH_MODE) & BIT(bit));
 }
 
-static int rzg2l_write_oen(struct rzg2l_pinctrl *pctrl, u32 caps, u32 offset, u8 pin, u8 oen)
+static int rzg3s_oen_write(struct rzg2l_pinctrl *pctrl, u32 caps, u32 offset, u8 pin, u8 oen)
 {
        u8 max_port = pctrl->data->hwcfg->oen_max_port;
        u8 max_pin = pctrl->data->hwcfg->oen_max_pin;
        unsigned long flags;
        u8 val, bit;
 
-       if (!rzg2l_oen_is_supported(caps, pin, max_pin))
+       if (!rzg3s_oen_is_supported(caps, pin, max_pin))
                return -EINVAL;
 
-       bit = rzg2l_pin_to_oen_bit(offset, pin, max_port);
+       bit = rzg3s_pin_to_oen_bit(offset, pin, max_port);
 
        spin_lock_irqsave(&pctrl->lock, flags);
        val = readb(pctrl->base + ETH_MODE);
@@ -1220,6 +1220,8 @@ static int rzg2l_pinctrl_pinconf_get(struct pinctrl_dev *pctldev,
                break;
 
        case PIN_CONFIG_OUTPUT_ENABLE:
+               if (!pctrl->data->oen_read)
+                       return -EOPNOTSUPP;
                arg = pctrl->data->oen_read(pctrl, cfg, _pin, bit);
                if (!arg)
                        return -EINVAL;
@@ -1359,6 +1361,8 @@ static int rzg2l_pinctrl_pinconf_set(struct pinctrl_dev *pctldev,
 
                case PIN_CONFIG_OUTPUT_ENABLE:
                        arg = pinconf_to_config_argument(_configs[i]);
+                       if (!pctrl->data->oen_write)
+                               return -EOPNOTSUPP;
                        ret = pctrl->data->oen_write(pctrl, cfg, _pin, bit, !!arg);
                        if (ret)
                                return ret;
@@ -3070,8 +3074,6 @@ static struct rzg2l_pinctrl_data r9a07g043_data = {
 #endif
        .pwpr_pfc_lock_unlock = &rzg2l_pwpr_pfc_lock_unlock,
        .pmc_writeb = &rzg2l_pmc_writeb,
-       .oen_read = &rzg2l_read_oen,
-       .oen_write = &rzg2l_write_oen,
        .hw_to_bias_param = &rzg2l_hw_to_bias_param,
        .bias_param_to_hw = &rzg2l_bias_param_to_hw,
 };
@@ -3087,8 +3089,6 @@ static struct rzg2l_pinctrl_data r9a07g044_data = {
        .hwcfg = &rzg2l_hwcfg,
        .pwpr_pfc_lock_unlock = &rzg2l_pwpr_pfc_lock_unlock,
        .pmc_writeb = &rzg2l_pmc_writeb,
-       .oen_read = &rzg2l_read_oen,
-       .oen_write = &rzg2l_write_oen,
        .hw_to_bias_param = &rzg2l_hw_to_bias_param,
        .bias_param_to_hw = &rzg2l_bias_param_to_hw,
 };
@@ -3103,8 +3103,8 @@ static struct rzg2l_pinctrl_data r9a08g045_data = {
        .hwcfg = &rzg3s_hwcfg,
        .pwpr_pfc_lock_unlock = &rzg2l_pwpr_pfc_lock_unlock,
        .pmc_writeb = &rzg2l_pmc_writeb,
-       .oen_read = &rzg2l_read_oen,
-       .oen_write = &rzg2l_write_oen,
+       .oen_read = &rzg3s_oen_read,
+       .oen_write = &rzg3s_oen_write,
        .hw_to_bias_param = &rzg2l_hw_to_bias_param,
        .bias_param_to_hw = &rzg2l_bias_param_to_hw,
 };