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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?+lo8OepxDy880hiQcWpiKPZdH1njYBxlYU9IhLHolcTcWSCfrzEjLO1I+W+y?= =?us-ascii?Q?VEPayZot23hSVRS6TEMdwy6tHBWioSAkyFUrXSLlv3mpA2/3NaJYhL5e1ojp?= =?us-ascii?Q?pPtTHB71fmHN74PVjv28RPJqrm1nh2nlo8EOXVAlE90Sqfy1C5pH79syK1RQ?= =?us-ascii?Q?zN6fO68OihSKe0rvSsL3ei3t33aQ2K0onKeRI2vxA3I9pqnE33Gm1CLGqcq/?= =?us-ascii?Q?It1i2smmJujaehqTVpnLma86mEwEV18wqRFjAK5L4+zyFK5VbxaKuFZiX8pK?= =?us-ascii?Q?hFHL+gUArqsO6zlFlrtdfVkX0MD5qMPjl2terdDKxYkZk6J0ZXf9Dx+oRhz/?= =?us-ascii?Q?1OHNjnNrCszs8hvafOy/NlE6UZPtHmG0+nqBy7bGac9FKV4h/aDhO8B33UlJ?= =?us-ascii?Q?WBs/nsrsFQO4jHLM+EcNwvGCGiTAVPXzTs1XyYmb/1KzsTssN+a4ysBirJOP?= =?us-ascii?Q?Clron9LdD61rVFGPFh4NGdkwfgCIO4SDi0gVLPFk8ArXWR3RK+iOD5eE5AjW?= =?us-ascii?Q?k1HBqPbA/zQEEPSK300P2jt0owuZuBqf4OMyBw9Gxj7rr3ntAB2MDgU0nfOg?= =?us-ascii?Q?PAukMScNkipogGEkMKzege1V+TVlwRR5Af6goXbqRxWQTpEWyqYOeBwMaj1q?= =?us-ascii?Q?aCYb7tiCZThR1GG5Z0VF+Rr2xgKoMe5NdVNK+mrCL4VufvkL36allPem1MQ4?= =?us-ascii?Q?LkO3aqH87XqqKp9uRyfTEiVAVF7wEzL2hrqgzO3jnPAd7dWLrCN6Y+PCWIVF?= =?us-ascii?Q?R0n/nP7+RPoKMVW3Ne6Q+pWn2EVZZ4heDJto3/zPlnihNDhy5dwyZgT6jOw1?= =?us-ascii?Q?GytPr/o+lICOLNPy+w5+/gMVpldBGU8SFpU4SwiTnEV4jXlok1wVkB6a1x7m?= =?us-ascii?Q?r9nVeCGDeHN4mRD/TkvgGTuIoiDvYxulEvYxdljJ2QrcinnBZUP1UQzbVz21?= =?us-ascii?Q?8217MpsbRwBXRtZJfebEJTDvudACXSmaVwmU9s1IizStbJZqKdJDygxUGZl6?= =?us-ascii?Q?jv9GyCv4VL84qv3u9MJhYvbjnwjbdh+NwDueC5ftjf6IhYhE/Y4xTmdsxOQb?= =?us-ascii?Q?f/OdyvqXg7eIdlScUo9SphyGHw60pZEkB6wBTmwukaDkKqe1Z5C9O4/cbVLr?= =?us-ascii?Q?f7peDpJmbuxROB1GysCdrpqLV7gEMB5a+zUFm3UAWohkjpOVgKvutyMZEoU8?= =?us-ascii?Q?+sbQWuGpIOACdDXVHupb2G7TC29/GtdXHSxmz8m7L9Pk7RNnEZCyKCwvpi8U?= =?us-ascii?Q?Gmv8XADUGXoMNkjm2ko2SrUIk5M6P48lSR5PXMlwwfFIrr0hnlmD4BhUdJY/?= =?us-ascii?Q?V/NZh1M+kkE2gxBBQdbPsMYvP+HNaGv1U7fpRGPfbUypsNRpTZBzvwIUP1zi?= =?us-ascii?Q?E29C+sbfq3JSGtlMOpeOnnGsfz0+lW5gLwYTnld+17Y/W1tuUL0JHSQVL/zM?= =?us-ascii?Q?4t7ltQWJG9xQsExZ0OnDDLuBoLI4l0TR6B5Lh0QkRbTWVPezmo0FHEaQ5/sj?= =?us-ascii?Q?d3D0Wf6Qyp3MQdmgFMQ4KIEYxeVA08qxmNj92fcrALK+bP4e4XubyuLUZmVx?= =?us-ascii?Q?u7fY299iRB6ks9e9/Rmj8zGtZGFfQr1BVLlGivGx?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2afe6c23-cb21-4055-9f88-08dd7905afed X-MS-Exchange-CrossTenant-AuthSource: DB9PR04MB9626.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Apr 2025 14:32:29.1834 (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: SDQO4QOn93nt+En7+fPx62E1MihZpyxW7wBqXbBDrAK4T6w4aoUZYS3xFiAXWlC+Fg9n+BzV4FFkYZlEPbdrsQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM9PR04MB8324 On Fri, Apr 11, 2025 at 08:51:18AM +0200, Primoz Fiser wrote: > Hi Frank, > > On 10. 04. 25 17:01, Frank Li wrote: > > On Thu, Apr 10, 2025 at 11:02:43AM +0200, Primoz Fiser wrote: > >> Add property 'no-1-8-v' by default to usdhc1 (eMMC) node. Bootloader > >> will take care of deleting the property in case SOM supports HS400 mode > >> (1.8V IO voltage feature flag has to be set in the EEPROM). > > > > what means of EEPROM here? > > > > Generally eMMC worked fixed voltage, why need 'no-1-8-v' here, even no > > HS400 support. > > The phyCORE-i.MX93 SoM comes in two variants, one with 3.3V VDD_IO and > the other one with 1.8V VDD_IO voltage set. > > The 3.3V variant can only support DDR52 mode, while 1.8V variant will > support HS400ES eMMC mode. > > The information about VDD_IO option is encoded in the SoM's EEPROM. We > read EEPROM in the bootloader and clear "no-1-8-v" flag in case of 1.8V > SOM variant is detected. > > In case of EEPROM error (erased or read error) the fall-back option has > to support both SoM variants, hence the "no-1-8-v" flag has to be set by > default. Thanks, can add such detail information at commit message. Frank > > BR, > Primoz > > > > > > > Frank > >> > >> Signed-off-by: Primoz Fiser > >> --- > >> arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi | 1 + > >> 1 file changed, 1 insertion(+) > >> > >> diff --git a/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi b/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi > >> index 3d84eed33074..d6589d26c875 100644 > >> --- a/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi > >> +++ b/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi > >> @@ -172,6 +172,7 @@ &usdhc1 { > >> pinctrl-2 = <&pinctrl_usdhc1_200mhz>; > >> bus-width = <8>; > >> non-removable; > >> + no-1-8-v; > >> status = "okay"; > >> }; > >> > >> -- > >> 2.34.1 > >> > > -- > Primoz Fiser > phone: +386-41-390-545 > email: primoz.fiser@norik.com > -- > Norik systems d.o.o. > Your embedded software partner > Slovenia, EU > phone: +386-41-540-545 > email: info@norik.com