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bcm63xx: pinctrl: fix BCM6348 groups

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The current driver has some troubles:
 - Some groupings are wrong.
 - The pinctrl group0 owns pins never used (at least in Openwrt) for any
   pinmux. The driver hijacks all the pins on the group avoiding any other
   use, spite they're free. I.e. for buttons, causing this kernel error:
   [  4.735928] gpio-keys-polled keys: unable to claim gpio 479, err=-22
   [  4.742642] gpio-keys-polled: probe of keys failed with error -22
 - Minor errors about groupings on the documentation
 - Missing "diag" grouping in dtsi
 - Wrong groupings in dtsi

Fix it by setting the correct groups.
And relax the pin capturing, letting the gpios belonging to any group to
be used for other purposes like buttons. This was the behavior with stock
firmwares and old OpenWrt versions which never caused any trouble.

Signed-off-by: Daniel González Cabanelas <dgcbueu@gmail.com>
(Cherry-picked from commit 50cb3a750f)
This commit is contained in:
Daniel González Cabanelas 2020-05-19 15:56:29 +02:00 committed by Álvaro Fernández Rojas
parent e3e6ec3cda
commit 8f7a905ffb
3 changed files with 14 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
target/linux/bcm63xx/dts/bcm6348.dtsi
View File

@ -94,7 +94,7 @@
};
pinctrl_mii_snoop: mii_snoop {
function = "ext_ephy";
function = "mii_snoop";
groups = "group1", "group4";
};
@ -125,7 +125,12 @@
pinctrl_utopia: utopia {
function = "utopia";
groups = "group0", "group1", "group3";
groups = "group1", "group3", "group4";
};
pinctrl_diag: diag {
function = "diag";
groups = "group0", "group1", "group2", "group3", "group4";
};
};

6
target/linux/bcm63xx/patches-5.4/133-Documentation-add-BCM6348-pincontroller-binding-docu.patch
View File

@ -41,9 +41,9 @@ Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+
+name pins functions
+-----------------------------------------------------------
+group0 32-36 ext_mii, utopia, diag
+group0 32-36 ext_mii, diag
+group1 22-31 ext_ephy, mii_snoop, mii_pccard,
+ spi_master_uart, utopia, diag
+group2 16-21 pci, diag
+group3 8-15 ext_mii, utopia
+group4 0-7 ext_ephy, mii_snoop, legacy_led, diag
+group3 8-15 ext_mii, utopia, diag
+group4 0-7 ext_ephy, mii_snoop, legacy_led, utopia, diag

29
target/linux/bcm63xx/patches-5.4/134-pinctrl-add-a-pincontrol-driver-for-BCM6348.patch
View File

@ -37,7 +37,7 @@ Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+obj-$(CONFIG_PINCTRL_BCM6348) += pinctrl-bcm6348.o
--- /dev/null
+++ b/drivers/pinctrl/bcm63xx/pinctrl-bcm6348.c
@@ -0,0 +1,391 @@
@@ -0,0 +1,370 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
@ -225,15 +225,16 @@ Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+};
+
+static const char * const utopia_groups[] = {
+ "group0",
+ "group1",
+ "group3",
+ "group4",
+};
+
+static const char * const diag_groups[] = {
+ "group0",
+ "group1",
+ "group2",
+ "group3",
+ "group4",
+};
+
@ -335,27 +336,6 @@ Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+ return 0;
+}
+
+static int bcm6348_gpio_request_enable(struct pinctrl_dev *pctldev,
+ struct pinctrl_gpio_range *range,
+ unsigned offset)
+{
+ struct bcm6348_pinctrl *pctl = pinctrl_dev_get_drvdata(pctldev);
+ struct pin_desc *desc;
+ u32 mask;
+
+ /* don't reconfigure if already muxed */
+ desc = pin_desc_get(pctldev, offset);
+ if (desc->mux_usecount)
+ return 0;
+
+ mask = GROUP_MASK(offset);
+
+ /* disable all functions using this pin */
+ bcm6348_rmw_mux(pctl, mask, 0);
+
+ return 0;
+}
+
+static struct pinctrl_ops bcm6348_pctl_ops = {
+ .get_groups_count = bcm6348_pinctrl_get_group_count,
+ .get_group_name = bcm6348_pinctrl_get_group_name,
@ -371,8 +351,7 @@ Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+ .get_function_name = bcm6348_pinctrl_get_func_name,
+ .get_function_groups = bcm6348_pinctrl_get_groups,
+ .set_mux = bcm6348_pinctrl_set_mux,
+ .gpio_request_enable = bcm6348_gpio_request_enable,
+ .strict = true,
+ .strict = false,
+};
+
+static int bcm6348_pinctrl_probe(struct platform_device *pdev)