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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?HJXS9PMj5sJjnNFv9C+6KG+PLwO4AmnOzJFNhqbNo6DQmIH4i/LxDAhwp6za?= =?us-ascii?Q?h6GGnhdMwoqJT90JBQ1VhMxI2M6+MQpe/9yOpwCboB+++6p6HvX4cnBUBY+8?= =?us-ascii?Q?hh3RaquvEZEsuFwndZ5jtogoETIrOOGrXZjf2FGnxYDX9+o9DLlzg3ta41Kp?= =?us-ascii?Q?qtGyLhmzDTVR2ibmPf689OtfPDXWK686yMGs/XFHsKIwqy7LaO3mM5sTQNhf?= =?us-ascii?Q?7Nh1ais28AqTL8P3uvmDK1WuWoPWoZXYhbW7ZCS2ZKjNKNZjkHnpMYJ3e+th?= =?us-ascii?Q?GUJivMXIUo3R43nncsE1+kpoJHJsmHed/sgLMmaK4hdI+KExSr+RLWWTzA7j?= =?us-ascii?Q?1hpyklb4VJSG9pQfEZgLnZ98Kl1fECS/KwiDtn5ixkChshjYvMBAdEI4Fl/7?= =?us-ascii?Q?s6p3bVB+Orb9osO341uMBDhWJpMCMTF/Ya8zoQ18Op5PEJEBpglsvBySt79Q?= =?us-ascii?Q?5meP9Go/Hxz0B5DMNMrrDG3nHCZ76wBnjLbGt3q6Ad+98XzUdTA8B5aYyje7?= =?us-ascii?Q?Z9eMF0yPo2K/PGIbrSb9NIWqJCzi26CrEQ66Slc+KLmqzSz7YJehnt1eK/tF?= =?us-ascii?Q?tv6fQyLXZBrSkKxfF9eV+cMyfLddBPS/GaVQooIi6NpO/U8ju9xU3FY1VsSD?= =?us-ascii?Q?1DC+Ibh4SFaOugmmnZVnVYUgD/CFRqwVumkkaD9yUxBIWJPUcIqvUsAmnmIB?= =?us-ascii?Q?7/NnIXXthFuZcdfPgpG2ps87pTIG/DLQEYyrfLfZy4jn4b5qfySqIgrb2oF2?= =?us-ascii?Q?lpeTgqPK55b8SEW64OWcv0ogQLGN3po8m0sshyaCbPYXYfCQrv0o7g9VFDZG?= =?us-ascii?Q?kWdCLEfPzFXQFNvJIn6alN4LYE2R7ptjeh7wdxtaxVxUxhOXjmEcDFWBy3Pb?= =?us-ascii?Q?ltULdXwZROgyh5Qm9SEObJw2KhqXX3JecLw7Oy0Yws5b4So53bjGxB00YI9o?= =?us-ascii?Q?x+oFBcrdP4C55WdE3U8aLm3kgJ+C4yoa+t6RKRw7J6J0vjNXDYmzglZ29JYM?= =?us-ascii?Q?KIw1BooUR3lGZwncNFyO9N7wvj79M4+SKVknxxd8292loIogl6aajsyp1bfG?= =?us-ascii?Q?ns4jxzMq+nD/RpQT7hwsioXNlAForsLDj5GQxlEP7KAEocLT2WRLnEwwIWdZ?= =?us-ascii?Q?n/8DGp+r9eqPo4xt1NaStqRfa2wae8QxjtkrUhjh3ucAYKzmVk46vTJmFyJz?= =?us-ascii?Q?1ijGB5z2LLpH0OoSphDB87rMURuI2Hh0Og8w4kHt7W7xY7nl+63DpCQGC0l+?= =?us-ascii?Q?ZZxXNgwctT3mIqrF5wcvVuyMxKDDUR5+E9wCgymsPhlewfr9GW0inzVbHs6Q?= =?us-ascii?Q?QJpzg681FpOApOKDvnFRToh14OcY+upg5sj7b916kRIh0MiGEJ837/pOB7tr?= =?us-ascii?Q?TGu4paHEv9hPlr2/S6Q9ikgGVQKd04H1B7hQcZGBuPUqYHEOh1QG7xe1brL2?= =?us-ascii?Q?PB//+pUcB83KiuNmo1ZN4JTHRKuYfEp8qHGHVuKcJgDiXw/taf3oVypCI07J?= =?us-ascii?Q?scWzRamdMX6BCtlLlr0lBg5t0sHpY3i36CdvImokSxWAgIpzEMxoDiXvxZKA?= =?us-ascii?Q?JZDj4ua3DZjl8eAmZf+t+ZlYFkvtLfCUQRGDNovS0cyZFideoxAeb0QakuHC?= =?us-ascii?Q?ru8pnPTdxxXy2PW4muMvoUE=3D?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: b0c7f900-9930-489e-3b4b-08d9fab513d0 X-MS-Exchange-CrossTenant-AuthSource: VI1PR04MB4688.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Feb 2022 12:23:08.0886 (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: G7X77D0c9DwmWqTmhXw5btnjTn1DrVqnLKY+JN6LKAyrUD63WeVC6cqjyIhcZfPNPsu8Xurnb1EQdCD/pVNyoQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB7152 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 22-02-28 02:39:45, Peng Fan wrote: > Hi Abel, > > > Subject: Re: [PATCH 3/3] clk: imx8mp: remove SYS PLL 1/2 clock gates > > > > On 22-02-25 16:17:33, Peng Fan (OSS) wrote: > > > From: Peng Fan > > > > > > Remove the PLL 1/2 gates as it make AMP clock management harder > > > without obvious benifit. > > > > > > Signed-off-by: Peng Fan > > > --- > > > drivers/clk/imx/clk-imx8mp.c | 48 > > > ++++++++++++------------------------ > > > 1 file changed, 16 insertions(+), 32 deletions(-) > > > > > > diff --git a/drivers/clk/imx/clk-imx8mp.c > > > b/drivers/clk/imx/clk-imx8mp.c index f23b92906d3b..18f5b7c3ca9d > > 100644 > > > --- a/drivers/clk/imx/clk-imx8mp.c > > > +++ b/drivers/clk/imx/clk-imx8mp.c > > > @@ -480,44 +480,28 @@ static int imx8mp_clocks_probe(struct > > platform_device *pdev) > > > hws[IMX8MP_ARM_PLL_OUT] = imx_clk_hw_gate("arm_pll_out", > > "arm_pll_bypass", anatop_base + 0x84, 11); > > > hws[IMX8MP_SYS_PLL3_OUT] = imx_clk_hw_gate("sys_pll3_out", > > > "sys_pll3_bypass", anatop_base + 0x114, 11); > > > > > > - hws[IMX8MP_SYS_PLL1_40M_CG] = > > imx_clk_hw_gate("sys_pll1_40m_cg", "sys_pll1_bypass", anatop_base + 0x94, > > 27); > > > > Hmm, isn't there a chance that u-boot might gate these? Then, in kernel you > > won't have a way to ungate them, leaving the consumers hanging. > > Both NXP and Upstream U-Boot not touch these bits. With the CG managed > by Linux, it is hard to support AMP. This is same to Lucas's patch to > clk-imx8mq.c to drop the gate. > > The other method to support AMP well, is to add the CGs clk in device tree node > for Mcore. But we still need a method to support M core booted in U-Boot, and > linux may gate off the clock. > OK, thanks for clarifying that. Makes sense now. > Thanks, > Peng. > > > > > > - hws[IMX8MP_SYS_PLL1_80M_CG] = > > imx_clk_hw_gate("sys_pll1_80m_cg", "sys_pll1_bypass", anatop_base + 0x94, > > 25); > > > - hws[IMX8MP_SYS_PLL1_100M_CG] = > > imx_clk_hw_gate("sys_pll1_100m_cg", "sys_pll1_bypass", anatop_base + > > 0x94, 23); > > > - hws[IMX8MP_SYS_PLL1_133M_CG] = > > imx_clk_hw_gate("sys_pll1_133m_cg", "sys_pll1_bypass", anatop_base + > > 0x94, 21); > > > - hws[IMX8MP_SYS_PLL1_160M_CG] = > > imx_clk_hw_gate("sys_pll1_160m_cg", "sys_pll1_bypass", anatop_base + > > 0x94, 19); > > > - hws[IMX8MP_SYS_PLL1_200M_CG] = > > imx_clk_hw_gate("sys_pll1_200m_cg", "sys_pll1_bypass", anatop_base + > > 0x94, 17); > > > - hws[IMX8MP_SYS_PLL1_266M_CG] = > > imx_clk_hw_gate("sys_pll1_266m_cg", "sys_pll1_bypass", anatop_base + > > 0x94, 15); > > > - hws[IMX8MP_SYS_PLL1_400M_CG] = > > imx_clk_hw_gate("sys_pll1_400m_cg", "sys_pll1_bypass", anatop_base + > > 0x94, 13); > > > hws[IMX8MP_SYS_PLL1_OUT] = imx_clk_hw_gate("sys_pll1_out", > > > "sys_pll1_bypass", anatop_base + 0x94, 11); > > > > > > - hws[IMX8MP_SYS_PLL1_40M] = > > imx_clk_hw_fixed_factor("sys_pll1_40m", "sys_pll1_40m_cg", 1, 20); > > > - hws[IMX8MP_SYS_PLL1_80M] = > > imx_clk_hw_fixed_factor("sys_pll1_80m", "sys_pll1_80m_cg", 1, 10); > > > - hws[IMX8MP_SYS_PLL1_100M] = > > imx_clk_hw_fixed_factor("sys_pll1_100m", "sys_pll1_100m_cg", 1, 8); > > > - hws[IMX8MP_SYS_PLL1_133M] = > > imx_clk_hw_fixed_factor("sys_pll1_133m", "sys_pll1_133m_cg", 1, 6); > > > - hws[IMX8MP_SYS_PLL1_160M] = > > imx_clk_hw_fixed_factor("sys_pll1_160m", "sys_pll1_160m_cg", 1, 5); > > > - hws[IMX8MP_SYS_PLL1_200M] = > > imx_clk_hw_fixed_factor("sys_pll1_200m", "sys_pll1_200m_cg", 1, 4); > > > - hws[IMX8MP_SYS_PLL1_266M] = > > imx_clk_hw_fixed_factor("sys_pll1_266m", "sys_pll1_266m_cg", 1, 3); > > > - hws[IMX8MP_SYS_PLL1_400M] = > > imx_clk_hw_fixed_factor("sys_pll1_400m", "sys_pll1_400m_cg", 1, 2); > > > + hws[IMX8MP_SYS_PLL1_40M] = > > imx_clk_hw_fixed_factor("sys_pll1_40m", "sys_pll1_out", 1, 20); > > > + hws[IMX8MP_SYS_PLL1_80M] = > > imx_clk_hw_fixed_factor("sys_pll1_80m", "sys_pll1_out", 1, 10); > > > + hws[IMX8MP_SYS_PLL1_100M] = > > imx_clk_hw_fixed_factor("sys_pll1_100m", "sys_pll1_out", 1, 8); > > > + hws[IMX8MP_SYS_PLL1_133M] = > > imx_clk_hw_fixed_factor("sys_pll1_133m", "sys_pll1_out", 1, 6); > > > + hws[IMX8MP_SYS_PLL1_160M] = > > imx_clk_hw_fixed_factor("sys_pll1_160m", "sys_pll1_out", 1, 5); > > > + hws[IMX8MP_SYS_PLL1_200M] = > > imx_clk_hw_fixed_factor("sys_pll1_200m", "sys_pll1_out", 1, 4); > > > + hws[IMX8MP_SYS_PLL1_266M] = > > imx_clk_hw_fixed_factor("sys_pll1_266m", "sys_pll1_out", 1, 3); > > > + hws[IMX8MP_SYS_PLL1_400M] = > > imx_clk_hw_fixed_factor("sys_pll1_400m", > > > +"sys_pll1_out", 1, 2); > > > hws[IMX8MP_SYS_PLL1_800M] = > > imx_clk_hw_fixed_factor("sys_pll1_800m", > > > "sys_pll1_out", 1, 1); > > > > > > - hws[IMX8MP_SYS_PLL2_50M_CG] = > > imx_clk_hw_gate("sys_pll2_50m_cg", "sys_pll2_bypass", anatop_base + > > 0x104, 27); > > > - hws[IMX8MP_SYS_PLL2_100M_CG] = > > imx_clk_hw_gate("sys_pll2_100m_cg", "sys_pll2_bypass", anatop_base + > > 0x104, 25); > > > - hws[IMX8MP_SYS_PLL2_125M_CG] = > > imx_clk_hw_gate("sys_pll2_125m_cg", "sys_pll2_bypass", anatop_base + > > 0x104, 23); > > > - hws[IMX8MP_SYS_PLL2_166M_CG] = > > imx_clk_hw_gate("sys_pll2_166m_cg", "sys_pll2_bypass", anatop_base + > > 0x104, 21); > > > - hws[IMX8MP_SYS_PLL2_200M_CG] = > > imx_clk_hw_gate("sys_pll2_200m_cg", "sys_pll2_bypass", anatop_base + > > 0x104, 19); > > > - hws[IMX8MP_SYS_PLL2_250M_CG] = > > imx_clk_hw_gate("sys_pll2_250m_cg", "sys_pll2_bypass", anatop_base + > > 0x104, 17); > > > - hws[IMX8MP_SYS_PLL2_333M_CG] = > > imx_clk_hw_gate("sys_pll2_333m_cg", "sys_pll2_bypass", anatop_base + > > 0x104, 15); > > > - hws[IMX8MP_SYS_PLL2_500M_CG] = > > imx_clk_hw_gate("sys_pll2_500m_cg", "sys_pll2_bypass", anatop_base + > > 0x104, 13); > > > hws[IMX8MP_SYS_PLL2_OUT] = imx_clk_hw_gate("sys_pll2_out", > > > "sys_pll2_bypass", anatop_base + 0x104, 11); > > > > > > - hws[IMX8MP_SYS_PLL2_50M] = > > imx_clk_hw_fixed_factor("sys_pll2_50m", "sys_pll2_50m_cg", 1, 20); > > > - hws[IMX8MP_SYS_PLL2_100M] = > > imx_clk_hw_fixed_factor("sys_pll2_100m", "sys_pll2_100m_cg", 1, 10); > > > - hws[IMX8MP_SYS_PLL2_125M] = > > imx_clk_hw_fixed_factor("sys_pll2_125m", "sys_pll2_125m_cg", 1, 8); > > > - hws[IMX8MP_SYS_PLL2_166M] = > > imx_clk_hw_fixed_factor("sys_pll2_166m", "sys_pll2_166m_cg", 1, 6); > > > - hws[IMX8MP_SYS_PLL2_200M] = > > imx_clk_hw_fixed_factor("sys_pll2_200m", "sys_pll2_200m_cg", 1, 5); > > > - hws[IMX8MP_SYS_PLL2_250M] = > > imx_clk_hw_fixed_factor("sys_pll2_250m", "sys_pll2_250m_cg", 1, 4); > > > - hws[IMX8MP_SYS_PLL2_333M] = > > imx_clk_hw_fixed_factor("sys_pll2_333m", "sys_pll2_333m_cg", 1, 3); > > > - hws[IMX8MP_SYS_PLL2_500M] = > > imx_clk_hw_fixed_factor("sys_pll2_500m", "sys_pll2_500m_cg", 1, 2); > > > + hws[IMX8MP_SYS_PLL2_50M] = > > imx_clk_hw_fixed_factor("sys_pll2_50m", "sys_pll2_out", 1, 20); > > > + hws[IMX8MP_SYS_PLL2_100M] = > > imx_clk_hw_fixed_factor("sys_pll2_100m", "sys_pll2_out", 1, 10); > > > + hws[IMX8MP_SYS_PLL2_125M] = > > imx_clk_hw_fixed_factor("sys_pll2_125m", "sys_pll2_out", 1, 8); > > > + hws[IMX8MP_SYS_PLL2_166M] = > > imx_clk_hw_fixed_factor("sys_pll2_166m", "sys_pll2_out", 1, 6); > > > + hws[IMX8MP_SYS_PLL2_200M] = > > imx_clk_hw_fixed_factor("sys_pll2_200m", "sys_pll2_out", 1, 5); > > > + hws[IMX8MP_SYS_PLL2_250M] = > > imx_clk_hw_fixed_factor("sys_pll2_250m", "sys_pll2_out", 1, 4); > > > + hws[IMX8MP_SYS_PLL2_333M] = > > imx_clk_hw_fixed_factor("sys_pll2_333m", "sys_pll2_out", 1, 3); > > > + hws[IMX8MP_SYS_PLL2_500M] = > > imx_clk_hw_fixed_factor("sys_pll2_500m", > > > +"sys_pll2_out", 1, 2); > > > hws[IMX8MP_SYS_PLL2_1000M] = > > > imx_clk_hw_fixed_factor("sys_pll2_1000m", "sys_pll2_out", 1, 1); > > > > > > hws[IMX8MP_CLK_A53_DIV] = > > imx8m_clk_hw_composite_core("arm_a53_div", > > > imx8mp_a53_sels, ccm_base + 0x8000); > > > -- > > > 2.25.1 > > >