From: Jianqun Xu <jay.xu@rock-chips.com> To: heiko@sntech.de Cc: linus.walleij@linaro.org, linux-rockchip@lists.infradead.org, linux-gpio@vger.kernel.org, Jianqun Xu <jay.xu@rock-chips.com> Subject: [PATCH 1/2] gpio: rockchip: make gpio work without cru module Date: Thu, 3 Mar 2022 14:22:10 +0800 [thread overview] Message-ID: <20220303062211.1378883-2-jay.xu@rock-chips.com> (raw) In-Reply-To: <20220303062211.1378883-1-jay.xu@rock-chips.com> In some case the system may has no builtin cru module, the gpio driver will fail to get periph clock and debounce clock. On rockchip SoCs, the pclk and dbg clk are default to be enabled and ungated, the gpio possible to work without cru module. This patch makes gpio work fine without cru module. Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com> --- drivers/gpio/gpio-rockchip.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c index a4c4e4584f5b..1da0324445cc 100644 --- a/drivers/gpio/gpio-rockchip.c +++ b/drivers/gpio/gpio-rockchip.c @@ -195,6 +195,9 @@ static int rockchip_gpio_set_debounce(struct gpio_chip *gc, unsigned int cur_div_reg; u64 div; + if (!bank->db_clk) + return -ENOENT; + if (bank->gpio_type == GPIO_TYPE_V2 && !IS_ERR(bank->db_clk)) { div_debounce_support = true; freq = clk_get_rate(bank->db_clk); @@ -654,8 +657,10 @@ static int rockchip_get_bank_data(struct rockchip_pin_bank *bank) return -EINVAL; bank->clk = of_clk_get(bank->of_node, 0); - if (IS_ERR(bank->clk)) - return PTR_ERR(bank->clk); + if (IS_ERR(bank->clk)) { + bank->clk = NULL; + dev_warn(bank->dev, "works without clk pm\n"); + } clk_prepare_enable(bank->clk); id = readl(bank->reg_base + gpio_regs_v2.version_id); @@ -666,9 +671,8 @@ static int rockchip_get_bank_data(struct rockchip_pin_bank *bank) bank->gpio_type = GPIO_TYPE_V2; bank->db_clk = of_clk_get(bank->of_node, 1); if (IS_ERR(bank->db_clk)) { - dev_err(bank->dev, "cannot find debounce clk\n"); - clk_disable_unprepare(bank->clk); - return -EINVAL; + bank->db_clk = NULL; + dev_warn(bank->dev, "works without debounce clk pm\n"); } } else { bank->gpio_regs = &gpio_regs_v1; -- 2.25.1 _______________________________________________ Linux-rockchip mailing list Linux-rockchip@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-rockchip
WARNING: multiple messages have this Message-ID (diff)
From: Jianqun Xu <jay.xu@rock-chips.com> To: heiko@sntech.de Cc: linus.walleij@linaro.org, linux-rockchip@lists.infradead.org, linux-gpio@vger.kernel.org, Jianqun Xu <jay.xu@rock-chips.com> Subject: [PATCH 1/2] gpio: rockchip: make gpio work without cru module Date: Thu, 3 Mar 2022 14:22:10 +0800 [thread overview] Message-ID: <20220303062211.1378883-2-jay.xu@rock-chips.com> (raw) In-Reply-To: <20220303062211.1378883-1-jay.xu@rock-chips.com> In some case the system may has no builtin cru module, the gpio driver will fail to get periph clock and debounce clock. On rockchip SoCs, the pclk and dbg clk are default to be enabled and ungated, the gpio possible to work without cru module. This patch makes gpio work fine without cru module. Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com> --- drivers/gpio/gpio-rockchip.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/gpio/gpio-rockchip.c b/drivers/gpio/gpio-rockchip.c index a4c4e4584f5b..1da0324445cc 100644 --- a/drivers/gpio/gpio-rockchip.c +++ b/drivers/gpio/gpio-rockchip.c @@ -195,6 +195,9 @@ static int rockchip_gpio_set_debounce(struct gpio_chip *gc, unsigned int cur_div_reg; u64 div; + if (!bank->db_clk) + return -ENOENT; + if (bank->gpio_type == GPIO_TYPE_V2 && !IS_ERR(bank->db_clk)) { div_debounce_support = true; freq = clk_get_rate(bank->db_clk); @@ -654,8 +657,10 @@ static int rockchip_get_bank_data(struct rockchip_pin_bank *bank) return -EINVAL; bank->clk = of_clk_get(bank->of_node, 0); - if (IS_ERR(bank->clk)) - return PTR_ERR(bank->clk); + if (IS_ERR(bank->clk)) { + bank->clk = NULL; + dev_warn(bank->dev, "works without clk pm\n"); + } clk_prepare_enable(bank->clk); id = readl(bank->reg_base + gpio_regs_v2.version_id); @@ -666,9 +671,8 @@ static int rockchip_get_bank_data(struct rockchip_pin_bank *bank) bank->gpio_type = GPIO_TYPE_V2; bank->db_clk = of_clk_get(bank->of_node, 1); if (IS_ERR(bank->db_clk)) { - dev_err(bank->dev, "cannot find debounce clk\n"); - clk_disable_unprepare(bank->clk); - return -EINVAL; + bank->db_clk = NULL; + dev_warn(bank->dev, "works without debounce clk pm\n"); } } else { bank->gpio_regs = &gpio_regs_v1; -- 2.25.1
next prev parent reply other threads:[~2022-03-03 6:22 UTC|newest] Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-03-03 6:22 [PATCH 0/2] gpio-rochchip Jianqun Xu 2022-03-03 6:22 ` Jianqun Xu 2022-03-03 6:22 ` Jianqun Xu [this message] 2022-03-03 6:22 ` [PATCH 1/2] gpio: rockchip: make gpio work without cru module Jianqun Xu 2022-03-03 11:28 ` Heiko Stübner 2022-03-03 11:28 ` Heiko Stübner 2022-03-04 3:00 ` jay.xu 2022-03-03 6:22 ` [PATCH 2/2] gpio: rockchip: get pinctrl node from 'gpio-ranges' property Jianqun Xu 2022-03-03 6:22 ` Jianqun Xu 2022-03-03 11:40 ` Heiko Stübner 2022-03-03 11:40 ` Heiko Stübner 2022-03-04 3:02 ` jay.xu 2022-03-07 8:08 ` jay.xu 2022-03-15 1:15 ` Linus Walleij 2022-03-15 1:15 ` Linus Walleij
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20220303062211.1378883-2-jay.xu@rock-chips.com \ --to=jay.xu@rock-chips.com \ --cc=heiko@sntech.de \ --cc=linus.walleij@linaro.org \ --cc=linux-gpio@vger.kernel.org \ --cc=linux-rockchip@lists.infradead.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.