linux-kernel - Re: [PATCH v2 2/9] clk: imx: vf610: Disable automatic clock gating for lpuart in LPSTOP mode

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Message-ID: <146800320338.73491.1283261070387404973@resonance>
Date:	Fri, 08 Jul 2016 11:40:03 -0700
From:	Michael Turquette <mturquette@...libre.com>
To:	Bhuvanchandra DV <bhuvanchandra.dv@...adex.com>,
	gregkh@...uxfoundation.org
Cc:	stefan@...er.ch, shawnguo@...nel.org, kernel@...gutronix.de,
	sboyd@...eaurora.org, jslaby@...e.com,
	linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
	"Bhuvanchandra DV" <bhuvanchandra.dv@...adex.com>
Subject: Re: [PATCH v2 2/9] clk: imx: vf610: Disable automatic clock gating for
 lpuart in LPSTOP mode

Quoting Bhuvanchandra DV (2016-06-27 22:32:28)
> From: Stefan Agner <stefan@...er.ch>
> 
> In order to allow wake support in STOP sleep mode, clocks are needed. Use
> imx_clk_gate2_cgr to disable automatic clock gating in low power mode STOP.
> This allows to enable wake by UART using:
> echo enabled > /sys/class/tty/ttyLP0/power/wakeup
> 
> However, if wake is not enabled, the driver should disable the clocks explicitly
> to save power.
> 
> Signed-off-by: Stefan Agner <stefan@...er.ch>
> Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@...adex.com>

Applied.

Regards,
Mike

> ---
>  drivers/clk/imx/clk-vf610.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/clk/imx/clk-vf610.c b/drivers/clk/imx/clk-vf610.c
> index 3a1f244..0476353 100644
> --- a/drivers/clk/imx/clk-vf610.c
> +++ b/drivers/clk/imx/clk-vf610.c
> @@ -315,12 +315,12 @@ static void __init vf610_clocks_init(struct device_node *ccm_node)
>  
>         clk[VF610_CLK_PIT] = imx_clk_gate2("pit", "ipg_bus", CCM_CCGR1, CCM_CCGRx_CGn(7));
>  
> -       clk[VF610_CLK_UART0] = imx_clk_gate2("uart0", "ipg_bus", CCM_CCGR0, CCM_CCGRx_CGn(7));
> -       clk[VF610_CLK_UART1] = imx_clk_gate2("uart1", "ipg_bus", CCM_CCGR0, CCM_CCGRx_CGn(8));
> -       clk[VF610_CLK_UART2] = imx_clk_gate2("uart2", "ipg_bus", CCM_CCGR0, CCM_CCGRx_CGn(9));
> -       clk[VF610_CLK_UART3] = imx_clk_gate2("uart3", "ipg_bus", CCM_CCGR0, CCM_CCGRx_CGn(10));
> -       clk[VF610_CLK_UART4] = imx_clk_gate2("uart4", "ipg_bus", CCM_CCGR6, CCM_CCGRx_CGn(9));
> -       clk[VF610_CLK_UART5] = imx_clk_gate2("uart5", "ipg_bus", CCM_CCGR6, CCM_CCGRx_CGn(10));
> +       clk[VF610_CLK_UART0] = imx_clk_gate2_cgr("uart0", "ipg_bus", CCM_CCGR0, CCM_CCGRx_CGn(7), 0x2);
> +       clk[VF610_CLK_UART1] = imx_clk_gate2_cgr("uart1", "ipg_bus", CCM_CCGR0, CCM_CCGRx_CGn(8), 0x2);
> +       clk[VF610_CLK_UART2] = imx_clk_gate2_cgr("uart2", "ipg_bus", CCM_CCGR0, CCM_CCGRx_CGn(9), 0x2);
> +       clk[VF610_CLK_UART3] = imx_clk_gate2_cgr("uart3", "ipg_bus", CCM_CCGR0, CCM_CCGRx_CGn(10), 0x2);
> +       clk[VF610_CLK_UART4] = imx_clk_gate2_cgr("uart4", "ipg_bus", CCM_CCGR6, CCM_CCGRx_CGn(9), 0x2);
> +       clk[VF610_CLK_UART5] = imx_clk_gate2_cgr("uart5", "ipg_bus", CCM_CCGR6, CCM_CCGRx_CGn(10), 0x2);
>  
>         clk[VF610_CLK_I2C0] = imx_clk_gate2("i2c0", "ipg_bus", CCM_CCGR4, CCM_CCGRx_CGn(6));
>         clk[VF610_CLK_I2C1] = imx_clk_gate2("i2c1", "ipg_bus", CCM_CCGR4, CCM_CCGRx_CGn(7));
> -- 
> 2.9.0
>