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Fri, 16 Oct 2026 13:05:16 +0000 Message-ID: Date: Fri, 16 Oct 2026 15:05:13 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] power: regulator: rk8xx: add RK818 LDO9 support To: Shigeaki Asai , u-boot@lists.u-boot-project.org Cc: u-boot-amlogic@groups.io, neil.armstrong@linaro.org, jh80.chung@samsung.com, peng.fan@nxp.com, kever.yang@rock-chips.com, sjg@chromium.org, trini@konsulko.com, ilias.apalodimas@linaro.org References: <20261010013237.2269021-1-y-asai.0816@docomonet.jp> <20261010013237.2269021-2-y-asai.0816@docomonet.jp> Content-Language: en-US From: Quentin Schulz In-Reply-To: <20261010013237.2269021-2-y-asai.0816@docomonet.jp> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: VIZP296CA0025.AUTP296.PROD.OUTLOOK.COM (2603:10a6:800:2a8::15) To PA3PR04MB11153.eurprd04.prod.outlook.com (2603:10a6:102:4ab::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PA3PR04MB11153:EE_|VI2PR04MB10956:EE_ X-MS-Office365-Filtering-Correlation-Id: 5623f523-1239-4de8-3896-08df2b861f26 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Its voltage reads back as > garbage and it cannot be enabled or set. > > Unlike LDO1-8, LDO9 is switched from the DCDC enable and sleep > registers (bit 5), and its voltage selector lives in > BOOST_LDO9_ON_VSEL/SLP_VSEL with the usual 1.8-3.4V, 100mV range. > > Add the table entry and handle LDO9 in the enable and suspend enable > helpers. > > This patch was written with the help of Claude (claude-opus-5-5). > > Signed-off-by: Shigeaki Asai > --- > drivers/power/regulator/rk8xx.c | 46 ++++++++++++++++++++++++++------- > 1 file changed, 36 insertions(+), 10 deletions(-) > > diff --git a/drivers/power/regulator/rk8xx.c b/drivers/power/regulator/rk8xx.c > index 88453bb7bdb..cb402c96ec8 100644 > --- a/drivers/power/regulator/rk8xx.c > +++ b/drivers/power/regulator/rk8xx.c > @@ -60,6 +60,8 @@ > #define RK818_BUCK4_VSEL_MASK 0x1f > #define RK818_LDO_VSEL_MASK 0x1f > #define RK818_LDO3_ON_VSEL_MASK 0xf > +/* LDO9 is switched from REG_DCDC_EN and REG_SLEEP_SET_OFF1 */ > +#define RK818_LDO9_EN_MASK BIT(5) > #define RK818_BOOST_ON_VSEL_MASK 0xe0 > #define RK818_USB_ILIM_SEL_MASK 0x0f > #define RK818_USB_CHG_SD_VSEL_MASK 0x70 > @@ -297,6 +299,8 @@ static const struct rk8xx_reg_info rk818_ldo[] = { > { 800000, 100000, REG_LDO6_ON_VSEL, REG_LDO6_SLP_VSEL, NA, RK818_LDO_VSEL_MASK, }, > { 800000, 100000, REG_LDO7_ON_VSEL, REG_LDO7_SLP_VSEL, NA, RK818_LDO_VSEL_MASK, }, > { 1800000, 100000, REG_LDO8_ON_VSEL, REG_LDO8_SLP_VSEL, NA, RK818_LDO_VSEL_MASK, }, > + { 1800000, 100000, REG_BOOST_LDO9_ON_VSEL, REG_BOOST_LDO9_SLP_VSEL, NA, > + RK818_LDO_VSEL_MASK, }, Please stay consistent with the rest of the file where we have everything on the same line. > }; > #endif > > @@ -695,8 +699,13 @@ static int _ldo_get_enable(struct udevice *pmic, int ldo) > break; > case RK808_ID: > case RK818_ID: > - mask = 1 << ldo; > - ret = pmic_reg_read(pmic, REG_LDO_EN); > + if (priv->variant == RK818_ID && ldo == 8) { > + mask = RK818_LDO9_EN_MASK; > + ret = pmic_reg_read(pmic, REG_DCDC_EN); > + } else { > + mask = 1 << ldo; > + ret = pmic_reg_read(pmic, REG_LDO_EN); > + } This is not great, I would prefer to have some additional configuration in rk8xx_reg_info instead, but since we do it for many other cases already, nothing for you to do on this issue in this patch. Reviewed-by: Quentin Schulz Thanks! Quentin