diff options
| author |   Heiko Stuebner <heiko@sntech.de> | 2021-09-14 00:49:26 +0200 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2021-09-18 01:36:35 +0200 |
| commit | 59dd178e1d7cb6cac03b32aba7ed9bbce6761b6f (patch) | |
| tree | d3a3851f52ca21ebfe6cad96067eaad83ecba505 /drivers/gpio | |
| parent | pinctrl/rockchip: add a queue for deferred pin output settings on probe (diff) | |
| download | linux-dev-59dd178e1d7cb6cac03b32aba7ed9bbce6761b6f.tar.xz linux-dev-59dd178e1d7cb6cac03b32aba7ed9bbce6761b6f.zip | |
gpio/rockchip: fetch deferred output settings on probe
Fetch the output settings the pinctrl driver may have created
for pinctrl hogs and set the relevant pins as requested.
Fixes: 9ce9a02039de ("pinctrl/rockchip: drop the gpio related codes")
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20210913224926.1260726-5-heiko@sntech.de
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-rockchip.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c index 036b2d959503..d67c64a39e47 100644 --- a/drivers/gpio/gpio-rockchip.c +++ b/drivers/gpio/gpio-rockchip.c @@ -689,6 +689,7 @@ static int rockchip_gpio_probe(struct platform_device *pdev) struct device_node *pctlnp = of_get_parent(np); struct pinctrl_dev *pctldev = NULL; struct rockchip_pin_bank *bank = NULL; + struct rockchip_pin_output_deferred *cfg; static int gpio; int id, ret; @@ -716,12 +717,33 @@ static int rockchip_gpio_probe(struct platform_device *pdev) if (ret) return ret; + /* + * Prevent clashes with a deferred output setting + * being added right at this moment. + */ + mutex_lock(&bank->deferred_lock); + ret = rockchip_gpiolib_register(bank); if (ret) { clk_disable_unprepare(bank->clk); + mutex_unlock(&bank->deferred_lock); return ret; } + while (!list_empty(&bank->deferred_output)) { + cfg = list_first_entry(&bank->deferred_output, + struct rockchip_pin_output_deferred, head); + list_del(&cfg->head); + + ret = rockchip_gpio_direction_output(&bank->gpio_chip, cfg->pin, cfg->arg); + if (ret) + dev_warn(dev, "setting output pin %u to %u failed\n", cfg->pin, cfg->arg); + + kfree(cfg); + } + + mutex_unlock(&bank->deferred_lock); + platform_set_drvdata(pdev, bank); dev_info(dev, "probed %pOF\n", np); |