From 8f7a905ffb45fddc1ee2148104764c47be4ae56a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Daniel=20Gonz=C3=A1lez=20Cabanelas?= Date: Tue, 19 May 2020 15:56:29 +0200 Subject: [PATCH] bcm63xx: pinctrl: fix BCM6348 groups MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 (Cherry-picked from commit 50cb3a750f) --- target/linux/bcm63xx/dts/bcm6348.dtsi | 9 ++++-- ...d-BCM6348-pincontroller-binding-docu.patch | 6 ++-- ...-add-a-pincontrol-driver-for-BCM6348.patch | 29 +++---------------- 3 files changed, 14 insertions(+), 30 deletions(-) diff --git a/target/linux/bcm63xx/dts/bcm6348.dtsi b/target/linux/bcm63xx/dts/bcm6348.dtsi index 1e04486909c..38bb71e53cc 100644 --- a/target/linux/bcm63xx/dts/bcm6348.dtsi +++ b/target/linux/bcm63xx/dts/bcm6348.dtsi @@ -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"; }; }; diff --git a/target/linux/bcm63xx/patches-5.4/133-Documentation-add-BCM6348-pincontroller-binding-docu.patch b/target/linux/bcm63xx/patches-5.4/133-Documentation-add-BCM6348-pincontroller-binding-docu.patch index 6bac90373c6..800f0540cc9 100644 --- a/target/linux/bcm63xx/patches-5.4/133-Documentation-add-BCM6348-pincontroller-binding-docu.patch +++ b/target/linux/bcm63xx/patches-5.4/133-Documentation-add-BCM6348-pincontroller-binding-docu.patch @@ -41,9 +41,9 @@ Signed-off-by: Jonas Gorski + +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 diff --git a/target/linux/bcm63xx/patches-5.4/134-pinctrl-add-a-pincontrol-driver-for-BCM6348.patch b/target/linux/bcm63xx/patches-5.4/134-pinctrl-add-a-pincontrol-driver-for-BCM6348.patch index b48723c1b3a..3b613fdca53 100644 --- a/target/linux/bcm63xx/patches-5.4/134-pinctrl-add-a-pincontrol-driver-for-BCM6348.patch +++ b/target/linux/bcm63xx/patches-5.4/134-pinctrl-add-a-pincontrol-driver-for-BCM6348.patch @@ -37,7 +37,7 @@ Signed-off-by: Jonas Gorski +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 +}; + +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 + 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 + .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)