Oh yeah will do, thanks. -----邮件原件----- 发件人: Billy Laws <blaws05@xxxxxxxxx> 发送时间: Tuesday, January 29, 2019 3:36 PM 收件人: Mark Zhang <markz@xxxxxxxxxx> 抄送: Lee Jones <lee.jones@xxxxxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx; linux-tegra@xxxxxxxxxxxxxxx; Laxman Dewangan <ldewangan@xxxxxxxxxx>; Venkat Reddy Talla <vreddytalla@xxxxxxxxxx> 主题: Re: [2/2] mfd: max77620: Add low battery monitor support Sure, that's fine with me, will send then this gets accepted. Two other things: you should probably set the reg to 0 if the property isn't specified as regmap_add_irqchip sets it to 0xff (basically all enabled on highest limit), and you haven't updated the dt-bindings. On Tue, Jan 29, 2019 at 6:52 AM Mark Zhang <markz@xxxxxxxxxx> wrote: > > On 1/27/2019 10:54 PM, Billy Laws wrote: > > >This patch adds PMIC configurations for low-battery >monitoring > > by handling max77620 register CNFGGLBL1. > > > > > It might be an idea to add lbhyst configuration here and support > > using custom lbdac values to specify a different cutoff point. > > Yeah this patch doesn't have support to program LBHYST & LBDAC because > according to our experiences, we don't have requirement to modify them > when low battery monitor support added. > > I think we can create a new patch to support these 2 fields in the > future when we really need them. Or you can create a patch if you have > requirement for them, is this OK to you Billy? > > Mark > > > > > See: https://datasheetspdf.com/pdf-file/924230/Maxim/MAX8698C/1 pg > > 46 > > >Signed-off-by: Laxman Dewangan <ldewangan@xxxxxxxxxx> > > >Signed-off-by: Venkat Reddy Talla <vreddytalla@xxxxxxxxxx> > > >Signed-off-by: Mark Zhang <markz@xxxxxxxxxx> > > >--- > > > drivers/mfd/max77620.c | 57 > > +++++++++++++++++++++++++++++++++++++++++- > > > 1 file changed, 56 insertions(+), 1 deletion(-) > >diff --git > > a/drivers/mfd/max77620.c b/drivers/mfd/max77620.c >index > > f58143103185..9e50d145afd8 100644 > > >--- a/drivers/mfd/max77620.c > > >+++ b/drivers/mfd/max77620.c > > >@@ -474,6 +474,57 @@ static int > > max77620_init_backup_battery_charging(struct max77620_chip *chip) > > > return ret; > } > >+static int > > max77620_init_low_battery_monitor(struct max77620_chip *chip) >+{ > > >+ struct device *dev = chip->dev; >+ struct device_node *np; >+ > > bool pval; >+ u8 mask = 0; >+ u8 val = 0; >+ int ret; >+ >+ np > > = of_get_child_by_name(dev->of_node, "low-battery-monitor"); >+ if > > (!np) { >+ dev_info(dev, "Low battery monitoring support > > disabled\n"); >+ return 0; >+ } >+ >+ pval = > > of_property_read_bool(np, "maxim,low-battery-dac-enable"); >+ if > > (pval) { >+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN; >+ val |= > > MAX77620_CNFGGLBL1_LBDAC_EN; >+ } >+ >+ pval = > > of_property_read_bool(np, "maxim,low-battery-dac-disable"); >+ if > > (pval) >+ mask |= MAX77620_CNFGGLBL1_LBDAC_EN; >+ >+ pval = > > of_property_read_bool(np, "maxim,low-battery-shutdown-enable"); > > >+ if (pval) { > > >+ mask |= MAX77620_CNFGGLBL1_MPPLD; >+ val |= > > MAX77620_CNFGGLBL1_MPPLD; >+ } >+ >+ pval = > > of_property_read_bool(np, "maxim,low-battery-shutdown-disable"); > > >+ if (pval) > > >+ mask |= MAX77620_CNFGGLBL1_MPPLD; >+ >+ pval = > > of_property_read_bool(np, "maxim,low-battery-reset-enable"); > > >+ if (pval) { > > >+ mask |= MAX77620_CNFGGLBL1_LBRSTEN; >+ val |= > > MAX77620_CNFGGLBL1_LBRSTEN; >+ } >+ >+ pval = > > of_property_read_bool(np, "maxim,low-battery-reset-disable"); > > >+ if (pval) > > >+ mask |= MAX77620_CNFGGLBL1_LBRSTEN; >+ >+ ret = > > regmap_update_bits(chip->rmap, MAX77620_REG_CNFGGLBL1, mask, val); > > >+ if (ret < 0) >+ dev_err(dev, "Reg CNFGGLBL1 update failed: > > %d\n", ret); >+ return ret; >+} >+ > static int > > max77620_read_es_version(struct max77620_chip *chip) > { > > > unsigned int val; >@@ -563,7 +614,11 @@ static int > > max77620_probe(struct i2c_client *client, > if (ret < 0) > > > return ret; > > > >- ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, >+ > > ret = max77620_init_low_battery_monitor(chip); > > >+ if (ret < 0) > > >+ return ret; > > >+ > > >+ ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, > > > mfd_cells, n_mfd_cells, NULL, 0, > > > regmap_irq_get_domain(chip->top_irq_data)); > > > if (ret < 0) { > >
