From: Lukasz Majewski <lukma@denx.de>
To: u-boot@lists.denx.de
Subject: [PATCH v2 15/21] serial_lpuart: add clock enable if CONFIG_CLK is defined
Date: Tue, 28 Jan 2020 09:36:14 +0100 [thread overview]
Message-ID: <20200128093614.53fa81de@jawa> (raw)
In-Reply-To: <20200110144711.81938-16-giulio.benetti@benettiengineering.com>
Hi Giulio,
> This driver assumes that lpuart clock is already enabled before
> probing but using DM only lpuart won't be automatically enabled so add
> clk_enable() when probing if CONFIG_CLK is defined. If clock is not
> found, because DM is not used, let's emit a warning and proceed,
> because serial clock could also be already enabled by non DM code. If
> clock is found but cna't be enabled then return with error.
^^^^ - can't
>
> Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
> ---
> V1->V2:
> * moved error as warning if clk not found
> ---
> drivers/serial/serial_lpuart.c | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/drivers/serial/serial_lpuart.c
> b/drivers/serial/serial_lpuart.c index 4b0a964d1b..b2ec56172e 100644
> --- a/drivers/serial/serial_lpuart.c
> +++ b/drivers/serial/serial_lpuart.c
> @@ -483,6 +483,22 @@ static int lpuart_serial_pending(struct udevice
> *dev, bool input)
> static int lpuart_serial_probe(struct udevice *dev)
> {
> +#if CONFIG_IS_ENABLED(CLK)
> + struct clk per_clk;
> + int ret;
> +
> + ret = clk_get_by_name(dev, "per", &per_clk);
> + if (!ret) {
> + ret = clk_enable(&per_clk);
> + if (ret) {
> + dev_err(dev, "Failed to get per clk: %d\n",
> ret);
> + return ret;
> + }
> + } else {
> + dev_warn(dev, "Failed to get per clk: %d\n", ret);
^^^^^^ - please change to debug() as some devices may
enable CONFIG_CLK, but did not yet support (have
implemented) this clock in CCF.
> + }
> +#endif
> +
> if (is_lpuart32(dev))
> return _lpuart32_serial_init(dev);
> else
Best regards,
Lukasz Majewski
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma at denx.de
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next prev parent reply other threads:[~2020-01-28 8:36 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-10 14:46 [PATCH v2 00/21] Add i.MXRT family support Giulio Benetti
2020-01-10 14:46 ` [PATCH v2 01/21] spl: fix entry_point equal to load_addr Giulio Benetti
2020-01-15 12:46 ` sbabic at denx.de
2020-01-28 8:09 ` Lukasz Majewski
2020-01-28 16:37 ` Giulio Benetti
2020-01-29 8:33 ` Lukasz Majewski
2020-01-10 14:46 ` [PATCH v2 02/21] armv7m: cache: add mmu_set_region_dcache_behaviour() stub for compatibility Giulio Benetti
2020-01-15 12:46 ` sbabic at denx.de
2020-01-28 8:10 ` Lukasz Majewski
2020-01-28 16:50 ` Giulio Benetti
2020-01-29 8:36 ` Lukasz Majewski
2020-01-10 14:46 ` [PATCH v2 03/21] clk: imx: pllv3: register PLLV3 GENERIC and USB as 2 different clocks Giulio Benetti
2020-01-15 12:47 ` sbabic at denx.de
2020-01-10 14:46 ` [PATCH v2 04/21] clk: imx: pllv3: set div_mask differently if PLLV3 is GENERIC or USB Giulio Benetti
2020-01-15 12:47 ` sbabic at denx.de
2020-01-10 14:46 ` [PATCH v2 05/21] clk: imx: pllv3: add enable() support Giulio Benetti
2020-01-15 12:46 ` sbabic at denx.de
2020-01-28 8:14 ` Lukasz Majewski
2020-01-28 18:46 ` Giulio Benetti
2020-01-10 14:46 ` [PATCH v2 06/21] clk: imx: pllv3: add disable() support Giulio Benetti
2020-01-15 12:47 ` sbabic at denx.de
2020-01-10 14:46 ` [PATCH v2 07/21] clk: imx: pllv3: add set_rate() support Giulio Benetti
2020-01-15 12:46 ` sbabic at denx.de
2020-01-10 14:46 ` [PATCH v2 08/21] clk: imx: pllv3: add PLLV3_SYS support Giulio Benetti
2020-01-15 12:47 ` sbabic at denx.de
2020-01-10 14:46 ` [PATCH v2 09/21] clk: imx: pllv3: add support for PLLV3_AV type Giulio Benetti
2020-01-15 12:46 ` sbabic at denx.de
2020-01-28 8:20 ` Lukasz Majewski
2020-01-31 13:50 ` Giulio Benetti
2020-01-10 14:47 ` [PATCH v2 10/21] clk: imx: pfd: add set_rate() Giulio Benetti
2020-01-15 12:46 ` sbabic at denx.de
2020-01-10 14:47 ` [PATCH v2 11/21] clk: imx: add i.IMXRT1050 clk driver Giulio Benetti
2020-01-15 12:46 ` sbabic at denx.de
2020-01-28 8:23 ` Lukasz Majewski
2020-01-10 14:47 ` [PATCH v2 12/21] pinctrl: add i.MXRT driver Giulio Benetti
2020-01-15 12:47 ` sbabic at denx.de
2020-01-28 8:27 ` Lukasz Majewski
2020-01-10 14:47 ` [PATCH v2 13/21] gpio: mxc_gpio: add support for i.MXRT1050 Giulio Benetti
2020-01-15 12:46 ` sbabic at denx.de
2020-01-28 8:27 ` Lukasz Majewski
2020-01-10 14:47 ` [PATCH v2 14/21] ARM: dts: imxrt1050: add dtsi file Giulio Benetti
2020-01-15 12:47 ` sbabic at denx.de
2020-01-28 8:31 ` Lukasz Majewski
2020-01-28 18:48 ` Giulio Benetti
2020-01-10 14:47 ` [PATCH v2 15/21] serial_lpuart: add clock enable if CONFIG_CLK is defined Giulio Benetti
2020-01-15 12:47 ` sbabic at denx.de
2020-01-28 8:36 ` Lukasz Majewski [this message]
2020-01-28 18:49 ` Giulio Benetti
2020-01-31 13:39 ` [PATCH] serial_lpuart: make clock failure less verbose Giulio Benetti
2020-01-31 18:14 ` Simon Glass
2020-01-31 20:24 ` Giulio Benetti
2020-02-01 12:48 ` Lukasz Majewski
2020-02-10 22:17 ` Giulio Benetti
2020-03-10 15:31 ` sbabic at denx.de
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