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Message-ID: <TY2PR01MB3788EAD4F3199695E15D7201B72EA@TY2PR01MB3788.jpnprd01.prod.outlook.com>
Date: Tue, 4 Jul 2023 09:03:54 +0000
From: Chris Paterson <Chris.Paterson2@...esas.com>
To: Geert Uytterhoeven <geert+renesas@...der.be>,
Linus Walleij <linus.walleij@...aro.org>,
Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>,
Biju Das <biju.das@...renesas.com>,
Fabrizio Castro <fabrizio.castro.jz@...esas.com>
CC: "linux-renesas-soc@...r.kernel.org"
<linux-renesas-soc@...r.kernel.org>,
"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH/RFT] pinctrl: renesas: rzv2m: Handle non-unique subnode
names
+ Fabrizio
Kind regards, Chris
> From: Geert Uytterhoeven <geert+renesas@...der.be>
> Sent: Monday, July 3, 2023 4:07 PM
>
> The eMMC and SDHI pin control configuration nodes in DT have subnodes
> with the same names ("data" and "ctrl"). As the RZ/V2M pin control
> driver considers only the names of the subnodes, this leads to
> conflicts:
>
> pinctrl-rzv2m b6250000.pinctrl: pin P8_2 already requested by
> 85000000.mmc; cannot claim for 85020000.mmc
> pinctrl-rzv2m b6250000.pinctrl: pin-130 (85020000.mmc) status -22
> renesas_sdhi_internal_dmac 85020000.mmc: Error applying setting,
> reverse things back
>
> Fix this by constructing unique names from the node names of both the
> pin control configuration node and its child node, where appropriate.
>
> Reported by: Fabrizio Castro <fabrizio.castro.jz@...esas.com>
> Fixes: 92a9b825257614af ("pinctrl: renesas: Add RZ/V2M pin and gpio
> controller driver")
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> ---
> Untested on real hardware.
> The RZ/G2L pin control drivers needs a similar fix.
>
> Before:
>
> $ cat /sys/kernel/debug/pinctrl/b6250000.pinctrl/pingroups
> registered pin groups:
> group: data
> pin 130 (P8_2)
> pin 131 (P8_3)
> pin 132 (P8_4)
> pin 133 (P8_5)
>
> group: ctrl
> pin 128 (P8_0)
> pin 129 (P8_1)
>
> group: cd
> pin 135 (P8_7)
>
> $ cat /sys/kernel/debug/pinctrl/b6250000.pinctrl/pinmux-functions
> function 0: data, groups = [ data ]
> function 1: ctrl, groups = [ ctrl ]
> function 2: cd, groups = [ cd ]
>
> After:
>
> $ cat /sys/kernel/debug/pinctrl/b6250000.pinctrl/pingroups
> registered pin groups:
> group: sd0.data
> pin 130 (P8_2)
> pin 131 (P8_3)
> pin 132 (P8_4)
> pin 133 (P8_5)
>
> group: emmc.data
> pin 0 (P0_0)
> pin 1 (P0_1)
> pin 2 (P0_2)
> pin 3 (P0_3)
> pin 4 (P0_4)
> pin 5 (P0_5)
> pin 6 (P0_6)
> pin 7 (P0_7)
>
> group: sd0.ctrl
> pin 128 (P8_0)
> pin 129 (P8_1)
>
> group: emmc.ctrl
> pin 10 (P0_10)
> pin 11 (P0_11)
>
> group: sd0.cd
> pin 135 (P8_7)
>
> group: sd0-uhs.data
> pin 130 (P8_2)
> pin 131 (P8_3)
> pin 132 (P8_4)
> pin 133 (P8_5)
>
> group: sd0-uhs.ctrl
> pin 128 (P8_0)
> pin 129 (P8_1)
>
> group: sd0-uhs.cd
> pin 135 (P8_7)
>
> $ cat /sys/kernel/debug/pinctrl/b6250000.pinctrl/pinmux-functions
> function 0: sd0.data, groups = [ sd0.data ]
> function 1: emmc.data, groups = [ emmc.data ]
> function 2: sd0.ctrl, groups = [ sd0.ctrl ]
> function 3: sd0.cd, groups = [ sd0.cd ]
> function 4: emmc.ctrl, groups = [ emmc.ctrl ]
> function 5: sd0-uhs.data, groups = [ sd0-uhs.data ]
> function 6: sd0-uhs.ctrl, groups = [ sd0-uhs.ctrl ]
> function 7: sd0-uhs.cd, groups = [ sd0-uhs.cd ]
> ---
> drivers/pinctrl/renesas/pinctrl-rzv2m.c | 28 ++++++++++++++++++-------
> 1 file changed, 20 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/pinctrl/renesas/pinctrl-rzv2m.c
> b/drivers/pinctrl/renesas/pinctrl-rzv2m.c
> index e5472293bc7fb247..35b23c1a5684d3e4 100644
> --- a/drivers/pinctrl/renesas/pinctrl-rzv2m.c
> +++ b/drivers/pinctrl/renesas/pinctrl-rzv2m.c
> @@ -209,6 +209,7 @@ static int rzv2m_map_add_config(struct pinctrl_map
> *map,
>
> static int rzv2m_dt_subnode_to_map(struct pinctrl_dev *pctldev,
> struct device_node *np,
> + struct device_node *parent,
> struct pinctrl_map **map,
> unsigned int *num_maps,
> unsigned int *index)
> @@ -226,6 +227,7 @@ static int rzv2m_dt_subnode_to_map(struct
> pinctrl_dev *pctldev,
> struct property *prop;
> int ret, gsel, fsel;
> const char **pin_fn;
> + const char *name;
> const char *pin;
>
> pinmux = of_find_property(np, "pinmux", NULL);
> @@ -309,8 +311,19 @@ static int rzv2m_dt_subnode_to_map(struct
> pinctrl_dev *pctldev,
> psel_val[i] = MUX_FUNC(value);
> }
>
> + if (parent) {
> + name = devm_kasprintf(pctrl->dev, GFP_KERNEL,
> "%pOFn.%pOFn",
> + parent, np);
> + if (!name) {
> + ret = -ENOMEM;
> + goto done;
> + }
> + } else {
> + name = np->name;
> + }
> +
> /* Register a single pin group listing all the pins we read from DT */
> - gsel = pinctrl_generic_add_group(pctldev, np->name, pins,
> num_pinmux, NULL);
> + gsel = pinctrl_generic_add_group(pctldev, name, pins, num_pinmux,
> NULL);
> if (gsel < 0) {
> ret = gsel;
> goto done;
> @@ -320,17 +333,16 @@ static int rzv2m_dt_subnode_to_map(struct
> pinctrl_dev *pctldev,
> * Register a single group function where the 'data' is an array PSEL
> * register values read from DT.
> */
> - pin_fn[0] = np->name;
> - fsel = pinmux_generic_add_function(pctldev, np->name, pin_fn, 1,
> - psel_val);
> + pin_fn[0] = name;
> + fsel = pinmux_generic_add_function(pctldev, name, pin_fn, 1,
> psel_val);
> if (fsel < 0) {
> ret = fsel;
> goto remove_group;
> }
>
> maps[idx].type = PIN_MAP_TYPE_MUX_GROUP;
> - maps[idx].data.mux.group = np->name;
> - maps[idx].data.mux.function = np->name;
> + maps[idx].data.mux.group = name;
> + maps[idx].data.mux.function = name;
> idx++;
>
> dev_dbg(pctrl->dev, "Parsed %pOF with %d pins\n", np,
> num_pinmux);
> @@ -377,7 +389,7 @@ static int rzv2m_dt_node_to_map(struct pinctrl_dev
> *pctldev,
> index = 0;
>
> for_each_child_of_node(np, child) {
> - ret = rzv2m_dt_subnode_to_map(pctldev, child, map,
> + ret = rzv2m_dt_subnode_to_map(pctldev, child, np, map,
> num_maps, &index);
> if (ret < 0) {
> of_node_put(child);
> @@ -386,7 +398,7 @@ static int rzv2m_dt_node_to_map(struct pinctrl_dev
> *pctldev,
> }
>
> if (*num_maps == 0) {
> - ret = rzv2m_dt_subnode_to_map(pctldev, np, map,
> + ret = rzv2m_dt_subnode_to_map(pctldev, np, NULL, map,
> num_maps, &index);
> if (ret < 0)
> goto done;
> --
> 2.34.1
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