Re: [PATCH v2 1/1] ARM: i.MX8M: add PCA9450 PMIC on rev-b EVK

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

Hi,

How do you generate your patches? Easiest is:

  git config sendemail.to barebox@lists.infradead.org
  git send-email -3 --annotate

This will take care to number the patches correctly.

On 11.01.23 11:01, Johannes Schneider wrote:
> Configure and setup the PMIC found on rev-b EVKs.
> The code is algiend with how imx8mn-evk handles both

aligned*

> PMIC variants: pca9450 vs bd71837

Please note which Boards you tested this on.

> 
> Signed-off-by: Johannes Schneider <johannes.schneider@leica-geosystems.com>
> ---
>  arch/arm/boards/nxp-imx8mm-evk/lowlevel.c | 51 +++++++++++++++--------
>  1 file changed, 34 insertions(+), 17 deletions(-)
> 
> diff --git a/arch/arm/boards/nxp-imx8mm-evk/lowlevel.c b/arch/arm/boards/nxp-imx8mm-evk/lowlevel.c
> index 6132df53ec..409554c2d5 100644
> --- a/arch/arm/boards/nxp-imx8mm-evk/lowlevel.c
> +++ b/arch/arm/boards/nxp-imx8mm-evk/lowlevel.c
> @@ -16,6 +16,7 @@
>  #include <mach/iomux-mx8mm.h>
>  #include <mach/imx8m-ccm-regs.h>
>  #include <mfd/bd71837.h>
> +#include <mfd/pca9450.h>
>  #include <mach/xload.h>
>  #include <soc/imx8m/ddr.h>
>  #include <image-metadata.h>
> @@ -38,6 +39,25 @@ static void setup_uart(void)
>  	putc_ll('>');
>  }
>  
> +static struct pmic_config pca9450_cfg[] = {
> +	/* BUCKxOUT_DVS0/1 control BUCK123 output */
> +	{ PCA9450_BUCK123_DVS, 0x29 },
> +	/*
> +	 * increase VDD_SOC to typical value 0.95V before first
> +	 * DRAM access, set DVS1 to 0.85v for suspend.
> +	 * Enable DVS control through PMIC_STBY_REQ and
> +	 * set B1_ENMODE=1 (ON by PMIC_ON_REQ=H)
> +	 */
> +	{ PCA9450_BUCK1OUT_DVS0, 0x1C },
> +	/* Set DVS1 to 0.85v for suspend */
> +	/* Enable DVS control through PMIC_STBY_REQ and set B1_ENMODE=1 (ON by PMIC_ON_REQ=H) */
> +	{ PCA9450_BUCK1OUT_DVS1, 0x14 },
> +	{ PCA9450_BUCK1CTRL, 0x59 },
> +
> +	/* set WDOG_B_CFG to cold reset */
> +	{ PCA9450_RESET_CTRL, 0xA1 },
> +};
> +
>  static struct pmic_config bd71837_cfg[] = {
>  	/* decrease RESET key long push time from the default 10s to 10ms */
>  	{ BD718XX_PWRONCONFIG1, 0x0 },
> @@ -51,21 +71,6 @@ static struct pmic_config bd71837_cfg[] = {
>  	{ BD718XX_REGLOCK, 0x11 },
>  };
>  
> -static void power_init_board(void)
> -{

Can you leave this function as-is? This will make the diff more
readable.

> -	struct pbl_i2c *i2c;
> -
> -	imx8mm_setup_pad(IMX8MM_PAD_I2C1_SCL_I2C1_SCL);
> -	imx8mm_setup_pad(IMX8MM_PAD_I2C1_SDA_I2C1_SDA);
> -
> -	imx8mm_early_clock_init();
> -	imx8m_ccgr_clock_enable(IMX8M_CCM_CCGR_I2C1);
> -
> -	i2c = imx8m_i2c_early_init(IOMEM(MX8MQ_I2C1_BASE_ADDR));
> -
> -	pmic_configure(i2c, 0x4b, bd71837_cfg, ARRAY_SIZE(bd71837_cfg));
> -}
> -
>  extern struct dram_timing_info imx8mm_evk_dram_timing;
>  
>  static void start_atf(void)
> @@ -78,8 +83,20 @@ static void start_atf(void)
>  	if (current_el() != 3)
>  		return;
>  
> -	power_init_board();
> -	imx8mm_ddr_init(&imx8mm_evk_dram_timing, DRAM_TYPE_LPDDR4);
> +	imx8mm_setup_pad(IMX8MM_PAD_I2C1_SCL_I2C1_SCL);
> +	imx8mm_setup_pad(IMX8MM_PAD_I2C1_SDA_I2C1_SDA);
> +
> +	imx8mm_early_clock_init();
> +	imx8m_ccgr_clock_enable(IMX8M_CCM_CCGR_I2C1);
> +
> +	i2c = imx8m_i2c_early_init(IOMEM(MX8MM_I2C1_BASE_ADDR));
> +
> +	imx8mm_ddr_init(&imx8mm_evk_lpddr4_timing, DRAM_TYPE_LPDDR4);
> +	if (i2c_dev_probe(i2c, 0x25, true) == 0) {
> +		pmic_configure(i2c, 0x25, pca9450_cfg, ARRAY_SIZE(pca9450_cfg));
> +	} else {
> +		pmic_configure(i2c, 0x4b, bd71837_cfg, ARRAY_SIZE(bd71837_cfg));
> +	}

Nitpick: You can drop the braces (Kernel coding style).

>  
>  	imx8mm_load_and_start_image_via_tfa();
>  }

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