Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Peng Fan <peng.fan@nxp.com>
To:     Shawn Guo <shawnguo@kernel.org>,
        Leonard Crestez <leonard.crestez@nxp.com>
CC:     Lucas Stach <l.stach@pengutronix.de>,
        "sboyd@kernel.org" <sboyd@kernel.org>,
        "s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
        "festevam@gmail.com" <festevam@gmail.com>,
        Abel Vesa <abel.vesa@nxp.com>,
        "kernel@pengutronix.de" <kernel@pengutronix.de>,
        dl-linux-imx <linux-imx@nxp.com>,
        Aisheng Dong <aisheng.dong@nxp.com>,
        "linux-clk@vger.kernel.org" <linux-clk@vger.kernel.org>,
        "linux-arm-kernel@lists.infradead.org" 
        <linux-arm-kernel@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Anson Huang <anson.huang@nxp.com>, Jacky Bai <ping.bai@nxp.com>
Subject: RE: [PATCH V2 2/4] clk: imx: imx8mq: use imx8m_clk_hw_composite_core
Thread-Topic: [PATCH V2 2/4] clk: imx: imx8mq: use imx8m_clk_hw_composite_core
Thread-Index: AQHVx4YUjgdbWY8cjkmCWC9mUDXV2qfrmjKAgAD0nRA=
Date:   Thu, 16 Jan 2020 01:48:14 +0000
Message-ID: <AM0PR04MB44816FCE748476F818719E9088360@AM0PR04MB4481.eurprd04.prod.outlook.com>
References: <1578640411-16991-1-git-send-email-peng.fan@nxp.com>
 <1578640411-16991-3-git-send-email-peng.fan@nxp.com>
 <VI1PR04MB7023981770D458F6D1FB546FEE340@VI1PR04MB7023.eurprd04.prod.outlook.com>
 <20200115111205.GB29329@T480>
In-Reply-To: <20200115111205.GB29329@T480>
Accept-Language: en-US
Content-Language: en-US
received-spf: None (protection.outlook.com: nxp.com does not designate
 permitted sender hosts)
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-Network-Message-Id: c73792e1-9785-4f14-ae8a-08d79a2626b0
X-MS-Exchange-CrossTenant-originalarrivaltime: 16 Jan 2020 01:48:14.3623
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: V2VcrSsLGthDt7lnZcMopJbncF65nw9W1TU9ufda0TtoAr7jHC2eMX9MAvDK7hyYYp1wdbp09IeLyV6ovTGPpA==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR04MB4770
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

> Subject: Re: [PATCH V2 2/4] clk: imx: imx8mq: use
> imx8m_clk_hw_composite_core
>=20
> On Tue, Jan 14, 2020 at 04:49:20PM +0000, Leonard Crestez wrote:
> > On 10.01.2020 09:17, Peng Fan wrote:
> > > From: Peng Fan <peng.fan@nxp.com>
> > >
> > > Use imx8m_clk_hw_composite_core to simplify code.
> > >
> > > Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
> > > Signed-off-by: Peng Fan <peng.fan@nxp.com>
> > > ---
> > >   drivers/clk/imx/clk-imx8mq.c | 19 +++++--------------
> > >   1 file changed, 5 insertions(+), 14 deletions(-)
> > >
> > > diff --git a/drivers/clk/imx/clk-imx8mq.c
> > > b/drivers/clk/imx/clk-imx8mq.c index 4c0edca1a6d0..b031183ff427
> > > 100644
> > > --- a/drivers/clk/imx/clk-imx8mq.c
> > > +++ b/drivers/clk/imx/clk-imx8mq.c
> > > @@ -403,22 +403,13 @@ static int imx8mq_clocks_probe(struct
> > > platform_device *pdev)
> > >
> > >   	/* CORE */
> > >   	hws[IMX8MQ_CLK_A53_SRC] =3D imx_clk_hw_mux2("arm_a53_src",
> base + 0x8000, 24, 3, imx8mq_a53_sels, ARRAY_SIZE(imx8mq_a53_sels));
> > > -	hws[IMX8MQ_CLK_M4_SRC] =3D imx_clk_hw_mux2("arm_m4_src", base
> + 0x8080, 24, 3, imx8mq_arm_m4_sels, ARRAY_SIZE(imx8mq_arm_m4_sels));
> > > -	hws[IMX8MQ_CLK_VPU_SRC] =3D imx_clk_hw_mux2("vpu_src", base +
> 0x8100, 24, 3, imx8mq_vpu_sels, ARRAY_SIZE(imx8mq_vpu_sels));
> > > -	hws[IMX8MQ_CLK_GPU_CORE_SRC] =3D
> imx_clk_hw_mux2("gpu_core_src", base + 0x8180, 24, 3,
> imx8mq_gpu_core_sels, ARRAY_SIZE(imx8mq_gpu_core_sels));
> > > -	hws[IMX8MQ_CLK_GPU_SHADER_SRC] =3D
> imx_clk_hw_mux2("gpu_shader_src", base + 0x8200, 24, 3,
> imx8mq_gpu_shader_sels,  ARRAY_SIZE(imx8mq_gpu_shader_sels));
> > > -
> > >   	hws[IMX8MQ_CLK_A53_CG] =3D
> imx_clk_hw_gate3_flags("arm_a53_cg", "arm_a53_src", base + 0x8000, 28,
> CLK_IS_CRITICAL);
> > > -	hws[IMX8MQ_CLK_M4_CG] =3D imx_clk_hw_gate3("arm_m4_cg",
> "arm_m4_src", base + 0x8080, 28);
> > > -	hws[IMX8MQ_CLK_VPU_CG] =3D imx_clk_hw_gate3("vpu_cg", "vpu_src",
> base + 0x8100, 28);
> > > -	hws[IMX8MQ_CLK_GPU_CORE_CG] =3D imx_clk_hw_gate3("gpu_core_cg",
> "gpu_core_src", base + 0x8180, 28);
> > > -	hws[IMX8MQ_CLK_GPU_SHADER_CG] =3D
> imx_clk_hw_gate3("gpu_shader_cg", "gpu_shader_src", base + 0x8200, 28);
> > > -
> > >   	hws[IMX8MQ_CLK_A53_DIV] =3D
> imx_clk_hw_divider2("arm_a53_div", "arm_a53_cg", base + 0x8000, 0, 3);
> > > -	hws[IMX8MQ_CLK_M4_DIV] =3D imx_clk_hw_divider2("arm_m4_div",
> "arm_m4_cg", base + 0x8080, 0, 3);
> > > -	hws[IMX8MQ_CLK_VPU_DIV] =3D imx_clk_hw_divider2("vpu_div",
> "vpu_cg", base + 0x8100, 0, 3);
> > > -	hws[IMX8MQ_CLK_GPU_CORE_DIV] =3D
> imx_clk_hw_divider2("gpu_core_div", "gpu_core_cg", base + 0x8180, 0, 3);
> > > -	hws[IMX8MQ_CLK_GPU_SHADER_DIV] =3D
> imx_clk_hw_divider2("gpu_shader_div", "gpu_shader_cg", base + 0x8200, 0,
> 3);
> > > +
> > > +	hws[IMX8MQ_CLK_M4_DIV] =3D
> imx8m_clk_hw_composite_core("arm_m4_div", imx8mq_arm_m4_sels, base
> + 0x8080);
> > > +	hws[IMX8MQ_CLK_VPU_DIV] =3D
> imx8m_clk_hw_composite_core("vpu_div", imx8mq_vpu_sels, base +
> 0x8100);
> > > +	hws[IMX8MQ_CLK_GPU_CORE_DIV] =3D
> imx8m_clk_hw_composite_core("gpu_core_div", imx8mq_gpu_core_sels,
> base + 0x8180);
> > > +	hws[IMX8MQ_CLK_GPU_SHADER_DIV] =3D
> > > +imx8m_clk_hw_composite("gpu_shader_div", imx8mq_gpu_shader_sels,
> > > +base + 0x8200);
> > >
> > >   	/* BUS */
> > >   	hws[IMX8MQ_CLK_MAIN_AXI] =3D
> > > imx8m_clk_hw_composite_critical("main_axi", imx8mq_main_axi_sels,
> > > base + 0x8800);
> >
> > Collapsing _SRC _CG into _DIV is an useful simplification but it
> > technically breaks DT compatibility rules.
> >
> > Inside imx8mq.dtsi there are clock assignments for
> > IMX8MQ_CLK_GPU_CORE_SRC and IMX8MQ_CLK_GPU_SHADER_SRC
> which no longer
> > exist so those assignments don't take effect.
>=20
> We do not want to break existing DTBs for this case.  Patches dropped.

I'll send a v3 to address the issues. Sorry.

Thanks,
Peng.

>=20
> Shawn