| Message ID | 20220311164628.378849-5-gengcixi@gmail.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | iio: adc: sc27xx: adjust structure and add PMIC's support | expand |
On Sat, 12 Mar 2022 00:46:25 +0800 Cixi Geng <gengcixi@gmail.com> wrote: > From: Cixi Geng <cixi.geng1@unisoc.com> > > sc2720 and sc2721 is the product of sc27xx series. > > Signed-off-by: Yuming Zhu <yuming.zhu1@unisoc.com> > Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com> For IIO change log should be under the --- as I don't want to see it in the final git log. > > v2 changes: > > 1. modify code by the baolin's comment > > Reviewed-by: Baolin Wang <baolin.wang7@gmail.com> Did Boalin give an RB? I'm not seeing it from a quick look at the v1 patch. You should not add Reviewed-by or Acked-by unless explicitly given by the person in question > > 2.fix smatch warnings in sc27xx_adc_read() > Again, blank lines in tag block. If you want to acknowledge the reports which is great, then you need to do something like. Reported-by: kernel test robot <lpk@intel.com> #smatch warnings Reported-by: Dan Carpenter <dan.carpenter@oracle.com> #as above. So we stick to one line tags with no gaps, but with a comment after them to provide context. It is also common to acknowledge these sort of changes in the change description below the --- only and not in the tag block. Either is acceptable in IIO but other maintainers may disagree in their areas of the kernel. Comments inline, Thanks, Jonathan > Reported-by: kernel test robot <lkp@intel.com> > Reported-by: Dan Carpenter <dan.carpenter@oracle.com> > --- > drivers/iio/adc/sc27xx_adc.c | 201 ++++++++++++++++++++++++++++++++++- > 1 file changed, 200 insertions(+), 1 deletion(-) > > diff --git a/drivers/iio/adc/sc27xx_adc.c b/drivers/iio/adc/sc27xx_adc.c > index 68629fbcfec5..2603ce313b07 100644 > --- a/drivers/iio/adc/sc27xx_adc.c > +++ b/drivers/iio/adc/sc27xx_adc.c > @@ -9,11 +9,13 @@ > #include <linux/of_device.h> > #include <linux/platform_device.h> > #include <linux/regmap.h> > +#include <linux/regulator/consumer.h> > #include <linux/slab.h> > > /* PMIC global registers definition */ > #define SC2731_MODULE_EN 0xc08 > #define SC27XX_MODULE_ADC_EN BIT(5) > +#define SC2721_ARM_CLK_EN 0xc0c > #define SC2731_ARM_CLK_EN 0xc10 > #define SC27XX_CLK_ADC_EN BIT(5) > #define SC27XX_CLK_ADC_CLK_EN BIT(6) > @@ -37,7 +39,9 @@ > /* Bits and mask definition for SC27XX_ADC_CH_CFG register */ > #define SC27XX_ADC_CHN_ID_MASK GENMASK(4, 0) > #define SC27XX_ADC_SCALE_MASK GENMASK(10, 9) > +#define SC2721_ADC_SCALE_MASK BIT(5) > #define SC27XX_ADC_SCALE_SHIFT 9 > +#define SC2721_ADC_SCALE_SHIFT 5 > > /* Bits definitions for SC27XX_ADC_INT_EN registers */ > #define SC27XX_ADC_IRQ_EN BIT(0) > @@ -67,8 +71,20 @@ > #define SC27XX_RATIO_NUMERATOR_OFFSET 16 > #define SC27XX_RATIO_DENOMINATOR_MASK GENMASK(15, 0) > > +/* ADC specific channel reference voltage 3.5V */ > +#define SC27XX_ADC_REFVOL_VDD35 3500000 > + > +/* ADC default channel reference voltage is 2.8V */ > +#define SC27XX_ADC_REFVOL_VDD28 2800000 > + > +enum sc27xx_pmic_type { > + SC27XX_ADC, > + SC2721_ADC, > +}; > + > struct sc27xx_adc_data { > struct device *dev; > + struct regulator *volref; > struct regmap *regmap; > /* > * One hardware spinlock to synchronize between the multiple > @@ -87,6 +103,7 @@ struct sc27xx_adc_data { > * in the device data structure. > */ > struct sc27xx_adc_variant_data { > + enum sc27xx_pmic_type pmic_type; > u32 module_en; > u32 clk_en; > u32 scale_shift; > @@ -188,6 +205,94 @@ static int sc27xx_adc_scale_calibration(struct sc27xx_adc_data *data, > return 0; > } > > +static int sc2720_adc_get_ratio(int channel, int scale) > +{ > + switch (channel) { > + case 14: > + switch (scale) { > + case 0: > + return SC27XX_VOLT_RATIO(68, 900); > + case 1: > + return SC27XX_VOLT_RATIO(68, 1760); > + case 2: > + return SC27XX_VOLT_RATIO(68, 2327); > + case 3: > + return SC27XX_VOLT_RATIO(68, 3654); > + default: > + return SC27XX_VOLT_RATIO(1, 1); > + } > + case 16: > + switch (scale) { > + case 0: > + return SC27XX_VOLT_RATIO(48, 100); > + case 1: > + return SC27XX_VOLT_RATIO(480, 1955); > + case 2: > + return SC27XX_VOLT_RATIO(480, 2586); > + case 3: > + return SC27XX_VOLT_RATIO(48, 406); > + default: > + return SC27XX_VOLT_RATIO(1, 1); > + } > + case 21: > + case 22: > + case 23: > + switch (scale) { > + case 0: > + return SC27XX_VOLT_RATIO(3, 8); > + case 1: > + return SC27XX_VOLT_RATIO(375, 1955); > + case 2: > + return SC27XX_VOLT_RATIO(375, 2586); > + case 3: > + return SC27XX_VOLT_RATIO(300, 3248); > + default: > + return SC27XX_VOLT_RATIO(1, 1); > + } > + default: > + switch (scale) { > + case 0: > + return SC27XX_VOLT_RATIO(1, 1); > + case 1: > + return SC27XX_VOLT_RATIO(1000, 1955); > + case 2: > + return SC27XX_VOLT_RATIO(1000, 2586); > + case 3: > + return SC27XX_VOLT_RATIO(100, 406); > + default: > + return SC27XX_VOLT_RATIO(1, 1); > + } > + } > + return SC27XX_VOLT_RATIO(1, 1); > +} > + > +static int sc2721_adc_get_ratio(int channel, int scale) > +{ > + switch (channel) { > + case 1: > + case 2: > + case 3: > + case 4: > + return scale ? SC27XX_VOLT_RATIO(400, 1025) : > + SC27XX_VOLT_RATIO(1, 1); > + case 5: > + return SC27XX_VOLT_RATIO(7, 29); > + case 7: > + case 9: > + return scale ? SC27XX_VOLT_RATIO(100, 125) : > + SC27XX_VOLT_RATIO(1, 1); > + case 14: > + return SC27XX_VOLT_RATIO(68, 900); > + case 16: > + return SC27XX_VOLT_RATIO(48, 100); > + case 19: > + return SC27XX_VOLT_RATIO(1, 3); > + default: > + return SC27XX_VOLT_RATIO(1, 1); > + } > + return SC27XX_VOLT_RATIO(1, 1); > +} > + > static int sc2731_adc_get_ratio(int channel, int scale) > { > switch (channel) { > @@ -216,6 +321,34 @@ static int sc2731_adc_get_ratio(int channel, int scale) > /* > * According to the datasheet set specific value on some channel. > */ > +static void sc2720_adc_scale_init(struct sc27xx_adc_data *data) > +{ > + int i; > + > + for (i = 0; i < SC27XX_ADC_CHANNEL_MAX; i++) { > + switch (i) { > + case 5: > + data->channel_scale[i] = 3; > + break; > + case 7: > + case 9: > + data->channel_scale[i] = 2; > + break; > + case 13: > + data->channel_scale[i] = 1; > + break; > + case 19: > + case 30: > + case 31: > + data->channel_scale[i] = 3; > + break; > + default: > + data->channel_scale[i] = 0; > + break; > + } > + } > +} > + > static void sc2731_adc_scale_init(struct sc27xx_adc_data *data) > { > int i; > @@ -231,7 +364,7 @@ static void sc2731_adc_scale_init(struct sc27xx_adc_data *data) > static int sc27xx_adc_read(struct sc27xx_adc_data *data, int channel, > int scale, int *val) > { > - int ret; > + int ret, ret_volref; > u32 tmp, value, status; > > ret = hwspin_lock_timeout_raw(data->hwlock, SC27XX_ADC_HWLOCK_TIMEOUT); > @@ -240,6 +373,22 @@ static int sc27xx_adc_read(struct sc27xx_adc_data *data, int channel, > return ret; > } > > + /* > + * According to the sc2721 chip data sheet, the reference voltage of > + * specific channel 30 and channel 31 in ADC module needs to be set from > + * the default 2.8v to 3.5v. > + */ > + if ((data->var_data->pmic_type == SC2721_ADC) && (channel == 30 || channel == 31)) { > + ret = regulator_set_voltage(data->volref, > + SC27XX_ADC_REFVOL_VDD35, > + SC27XX_ADC_REFVOL_VDD35); > + if (ret) { > + dev_err(data->dev, "failed to set the volref 3.5V\n"); > + hwspin_unlock_raw(data->hwlock); > + return ret; > + } > + } > + > ret = regmap_update_bits(data->regmap, data->base + SC27XX_ADC_CTL, > SC27XX_ADC_EN, SC27XX_ADC_EN); > if (ret) > @@ -294,6 +443,18 @@ static int sc27xx_adc_read(struct sc27xx_adc_data *data, int channel, > regmap_update_bits(data->regmap, data->base + SC27XX_ADC_CTL, > SC27XX_ADC_EN, 0); > unlock_adc: > + if (data->var_data->pmic_type == SC2721_ADC) { > + if ((channel == 30) || (channel == 31)) { > + ret_volref = regulator_set_voltage(data->volref, > + SC27XX_ADC_REFVOL_VDD28, > + SC27XX_ADC_REFVOL_VDD28); > + if (ret_volref) { > + dev_err(data->dev, "failed to set the volref 2.8V, ret_volref = 0x%x\n,ret_volref"); > + ret = ret || ret_volref; > + } > + } > + } > + > hwspin_unlock_raw(data->hwlock); > > if (!ret) > @@ -523,6 +684,7 @@ static void sc27xx_adc_disable(void *_data) > } > > static const struct sc27xx_adc_variant_data sc2731_data = { > + .pmic_type = SC27XX_ADC, > .module_en = SC2731_MODULE_EN, > .clk_en = SC2731_ARM_CLK_EN, > .scale_shift = SC27XX_ADC_SCALE_SHIFT, > @@ -533,6 +695,30 @@ static const struct sc27xx_adc_variant_data sc2731_data = { > .get_ratio = sc2731_adc_get_ratio, > }; > > +static const struct sc27xx_adc_variant_data sc2721_data = { > + .pmic_type = SC2721_ADC, > + .module_en = SC2731_MODULE_EN, > + .clk_en = SC2721_ARM_CLK_EN, > + .scale_shift = SC2721_ADC_SCALE_SHIFT, > + .scale_mask = SC2721_ADC_SCALE_MASK, > + .bscale_cal = &sc2731_big_scale_graph_calib, > + .sscale_cal = &sc2731_small_scale_graph_calib, > + .init_scale = sc2731_adc_scale_init, > + .get_ratio = sc2721_adc_get_ratio, > +}; > + > +static const struct sc27xx_adc_variant_data sc2720_data = { > + .pmic_type = SC27XX_ADC, > + .module_en = SC2731_MODULE_EN, > + .clk_en = SC2721_ARM_CLK_EN, > + .scale_shift = SC27XX_ADC_SCALE_SHIFT, > + .scale_mask = SC27XX_ADC_SCALE_MASK, > + .bscale_cal = &big_scale_graph_calib, > + .sscale_cal = &small_scale_graph_calib, > + .init_scale = sc2720_adc_scale_init, > + .get_ratio = sc2720_adc_get_ratio, > +}; > + > static int sc27xx_adc_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > @@ -583,6 +769,17 @@ static int sc27xx_adc_probe(struct platform_device *pdev) > } > > sc27xx_data->dev = dev; > + if (pdata->pmic_type == SC2721_ADC) { > + sc27xx_data->volref = devm_regulator_get_optional(dev, "vref"); What you are doing here is using get_optional to avoid a stub regulator, rather than because the regulator is in any sense optional. Perhaps a better approach would be do a normal get() and then check the supplied regulator is capable of setting the voltage to the two levels required? > + if (IS_ERR(sc27xx_data->volref)) { > + ret = PTR_ERR(sc27xx_data->volref); > + if (ret == -ENODEV) > + dev_err(dev, "failed to supply the regulator\n"); > + dev_err(dev, "failed to get ADC volref, the err volref: %d\n", ret); > + return ret; > + } > + } > + > sc27xx_data->var_data = pdata; > sc27xx_data->var_data->init_scale(sc27xx_data); > > @@ -612,6 +809,8 @@ static int sc27xx_adc_probe(struct platform_device *pdev) > > static const struct of_device_id sc27xx_adc_of_match[] = { > { .compatible = "sprd,sc2731-adc", .data = &sc2731_data}, > + { .compatible = "sprd,sc2721-adc", .data = &sc2721_data}, > + { .compatible = "sprd,sc2720-adc", .data = &sc2720_data}, > { } > }; > MODULE_DEVICE_TABLE(of, sc27xx_adc_of_match);
On Sat, Mar 12, 2022 at 12:47 AM Cixi Geng <gengcixi@gmail.com> wrote: > > From: Cixi Geng <cixi.geng1@unisoc.com> > > sc2720 and sc2721 is the product of sc27xx series. > > Signed-off-by: Yuming Zhu <yuming.zhu1@unisoc.com> > Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com> > > v2 changes: > > 1. modify code by the baolin's comment > > Reviewed-by: Baolin Wang <baolin.wang7@gmail.com> I think I did not add a reviewed-by tag for this patch before, please drop it. > > 2.fix smatch warnings in sc27xx_adc_read() > > Reported-by: kernel test robot <lkp@intel.com> > Reported-by: Dan Carpenter <dan.carpenter@oracle.com> > --- > drivers/iio/adc/sc27xx_adc.c | 201 ++++++++++++++++++++++++++++++++++- > 1 file changed, 200 insertions(+), 1 deletion(-) > > diff --git a/drivers/iio/adc/sc27xx_adc.c b/drivers/iio/adc/sc27xx_adc.c > index 68629fbcfec5..2603ce313b07 100644 > --- a/drivers/iio/adc/sc27xx_adc.c > +++ b/drivers/iio/adc/sc27xx_adc.c > @@ -9,11 +9,13 @@ > #include <linux/of_device.h> > #include <linux/platform_device.h> > #include <linux/regmap.h> > +#include <linux/regulator/consumer.h> > #include <linux/slab.h> > > /* PMIC global registers definition */ > #define SC2731_MODULE_EN 0xc08 > #define SC27XX_MODULE_ADC_EN BIT(5) > +#define SC2721_ARM_CLK_EN 0xc0c > #define SC2731_ARM_CLK_EN 0xc10 > #define SC27XX_CLK_ADC_EN BIT(5) > #define SC27XX_CLK_ADC_CLK_EN BIT(6) > @@ -37,7 +39,9 @@ > /* Bits and mask definition for SC27XX_ADC_CH_CFG register */ > #define SC27XX_ADC_CHN_ID_MASK GENMASK(4, 0) > #define SC27XX_ADC_SCALE_MASK GENMASK(10, 9) > +#define SC2721_ADC_SCALE_MASK BIT(5) > #define SC27XX_ADC_SCALE_SHIFT 9 > +#define SC2721_ADC_SCALE_SHIFT 5 > > /* Bits definitions for SC27XX_ADC_INT_EN registers */ > #define SC27XX_ADC_IRQ_EN BIT(0) > @@ -67,8 +71,20 @@ > #define SC27XX_RATIO_NUMERATOR_OFFSET 16 > #define SC27XX_RATIO_DENOMINATOR_MASK GENMASK(15, 0) > > +/* ADC specific channel reference voltage 3.5V */ > +#define SC27XX_ADC_REFVOL_VDD35 3500000 > + > +/* ADC default channel reference voltage is 2.8V */ > +#define SC27XX_ADC_REFVOL_VDD28 2800000 > + > +enum sc27xx_pmic_type { > + SC27XX_ADC, > + SC2721_ADC, > +}; > + > struct sc27xx_adc_data { > struct device *dev; > + struct regulator *volref; > struct regmap *regmap; > /* > * One hardware spinlock to synchronize between the multiple > @@ -87,6 +103,7 @@ struct sc27xx_adc_data { > * in the device data structure. > */ > struct sc27xx_adc_variant_data { > + enum sc27xx_pmic_type pmic_type; > u32 module_en; > u32 clk_en; > u32 scale_shift; > @@ -188,6 +205,94 @@ static int sc27xx_adc_scale_calibration(struct sc27xx_adc_data *data, > return 0; > } > > +static int sc2720_adc_get_ratio(int channel, int scale) > +{ > + switch (channel) { > + case 14: > + switch (scale) { > + case 0: > + return SC27XX_VOLT_RATIO(68, 900); > + case 1: > + return SC27XX_VOLT_RATIO(68, 1760); > + case 2: > + return SC27XX_VOLT_RATIO(68, 2327); > + case 3: > + return SC27XX_VOLT_RATIO(68, 3654); > + default: > + return SC27XX_VOLT_RATIO(1, 1); > + } > + case 16: > + switch (scale) { > + case 0: > + return SC27XX_VOLT_RATIO(48, 100); > + case 1: > + return SC27XX_VOLT_RATIO(480, 1955); > + case 2: > + return SC27XX_VOLT_RATIO(480, 2586); > + case 3: > + return SC27XX_VOLT_RATIO(48, 406); > + default: > + return SC27XX_VOLT_RATIO(1, 1); > + } > + case 21: > + case 22: > + case 23: > + switch (scale) { > + case 0: > + return SC27XX_VOLT_RATIO(3, 8); > + case 1: > + return SC27XX_VOLT_RATIO(375, 1955); > + case 2: > + return SC27XX_VOLT_RATIO(375, 2586); > + case 3: > + return SC27XX_VOLT_RATIO(300, 3248); > + default: > + return SC27XX_VOLT_RATIO(1, 1); > + } > + default: > + switch (scale) { > + case 0: > + return SC27XX_VOLT_RATIO(1, 1); > + case 1: > + return SC27XX_VOLT_RATIO(1000, 1955); > + case 2: > + return SC27XX_VOLT_RATIO(1000, 2586); > + case 3: > + return SC27XX_VOLT_RATIO(100, 406); > + default: > + return SC27XX_VOLT_RATIO(1, 1); > + } > + } > + return SC27XX_VOLT_RATIO(1, 1); > +} > + > +static int sc2721_adc_get_ratio(int channel, int scale) > +{ > + switch (channel) { > + case 1: > + case 2: > + case 3: > + case 4: > + return scale ? SC27XX_VOLT_RATIO(400, 1025) : > + SC27XX_VOLT_RATIO(1, 1); > + case 5: > + return SC27XX_VOLT_RATIO(7, 29); > + case 7: > + case 9: > + return scale ? SC27XX_VOLT_RATIO(100, 125) : > + SC27XX_VOLT_RATIO(1, 1); > + case 14: > + return SC27XX_VOLT_RATIO(68, 900); > + case 16: > + return SC27XX_VOLT_RATIO(48, 100); > + case 19: > + return SC27XX_VOLT_RATIO(1, 3); > + default: > + return SC27XX_VOLT_RATIO(1, 1); > + } > + return SC27XX_VOLT_RATIO(1, 1); > +} > + > static int sc2731_adc_get_ratio(int channel, int scale) > { > switch (channel) { > @@ -216,6 +321,34 @@ static int sc2731_adc_get_ratio(int channel, int scale) > /* > * According to the datasheet set specific value on some channel. > */ > +static void sc2720_adc_scale_init(struct sc27xx_adc_data *data) > +{ > + int i; > + > + for (i = 0; i < SC27XX_ADC_CHANNEL_MAX; i++) { > + switch (i) { > + case 5: > + data->channel_scale[i] = 3; > + break; > + case 7: > + case 9: > + data->channel_scale[i] = 2; > + break; > + case 13: > + data->channel_scale[i] = 1; > + break; > + case 19: > + case 30: > + case 31: > + data->channel_scale[i] = 3; > + break; > + default: > + data->channel_scale[i] = 0; > + break; > + } > + } > +} > + > static void sc2731_adc_scale_init(struct sc27xx_adc_data *data) > { > int i; > @@ -231,7 +364,7 @@ static void sc2731_adc_scale_init(struct sc27xx_adc_data *data) > static int sc27xx_adc_read(struct sc27xx_adc_data *data, int channel, > int scale, int *val) > { > - int ret; > + int ret, ret_volref; > u32 tmp, value, status; > > ret = hwspin_lock_timeout_raw(data->hwlock, SC27XX_ADC_HWLOCK_TIMEOUT); > @@ -240,6 +373,22 @@ static int sc27xx_adc_read(struct sc27xx_adc_data *data, int channel, > return ret; > } > > + /* > + * According to the sc2721 chip data sheet, the reference voltage of > + * specific channel 30 and channel 31 in ADC module needs to be set from > + * the default 2.8v to 3.5v. > + */ > + if ((data->var_data->pmic_type == SC2721_ADC) && (channel == 30 || channel == 31)) { > + ret = regulator_set_voltage(data->volref, > + SC27XX_ADC_REFVOL_VDD35, > + SC27XX_ADC_REFVOL_VDD35); > + if (ret) { > + dev_err(data->dev, "failed to set the volref 3.5V\n"); > + hwspin_unlock_raw(data->hwlock); Please remove duplicate code, just "goto unlock_adc". Then add a new label like "regultor_restore" to restore the regulator in the error path. > + return ret; > + } > + } > + > ret = regmap_update_bits(data->regmap, data->base + SC27XX_ADC_CTL, > SC27XX_ADC_EN, SC27XX_ADC_EN); > if (ret) > @@ -294,6 +443,18 @@ static int sc27xx_adc_read(struct sc27xx_adc_data *data, int channel, > regmap_update_bits(data->regmap, data->base + SC27XX_ADC_CTL, > SC27XX_ADC_EN, 0); > unlock_adc: > + if (data->var_data->pmic_type == SC2721_ADC) { > + if ((channel == 30) || (channel == 31)) { > + ret_volref = regulator_set_voltage(data->volref, > + SC27XX_ADC_REFVOL_VDD28, > + SC27XX_ADC_REFVOL_VDD28); > + if (ret_volref) { > + dev_err(data->dev, "failed to set the volref 2.8V, ret_volref = 0x%x\n,ret_volref"); > + ret = ret || ret_volref; > + } > + } > + } > + > hwspin_unlock_raw(data->hwlock); > > if (!ret) > @@ -523,6 +684,7 @@ static void sc27xx_adc_disable(void *_data) > } >
diff --git a/drivers/iio/adc/sc27xx_adc.c b/drivers/iio/adc/sc27xx_adc.c index 68629fbcfec5..2603ce313b07 100644 --- a/drivers/iio/adc/sc27xx_adc.c +++ b/drivers/iio/adc/sc27xx_adc.c @@ -9,11 +9,13 @@ #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/regmap.h> +#include <linux/regulator/consumer.h> #include <linux/slab.h> /* PMIC global registers definition */ #define SC2731_MODULE_EN 0xc08 #define SC27XX_MODULE_ADC_EN BIT(5) +#define SC2721_ARM_CLK_EN 0xc0c #define SC2731_ARM_CLK_EN 0xc10 #define SC27XX_CLK_ADC_EN BIT(5) #define SC27XX_CLK_ADC_CLK_EN BIT(6) @@ -37,7 +39,9 @@ /* Bits and mask definition for SC27XX_ADC_CH_CFG register */ #define SC27XX_ADC_CHN_ID_MASK GENMASK(4, 0) #define SC27XX_ADC_SCALE_MASK GENMASK(10, 9) +#define SC2721_ADC_SCALE_MASK BIT(5) #define SC27XX_ADC_SCALE_SHIFT 9 +#define SC2721_ADC_SCALE_SHIFT 5 /* Bits definitions for SC27XX_ADC_INT_EN registers */ #define SC27XX_ADC_IRQ_EN BIT(0) @@ -67,8 +71,20 @@ #define SC27XX_RATIO_NUMERATOR_OFFSET 16 #define SC27XX_RATIO_DENOMINATOR_MASK GENMASK(15, 0) +/* ADC specific channel reference voltage 3.5V */ +#define SC27XX_ADC_REFVOL_VDD35 3500000 + +/* ADC default channel reference voltage is 2.8V */ +#define SC27XX_ADC_REFVOL_VDD28 2800000 + +enum sc27xx_pmic_type { + SC27XX_ADC, + SC2721_ADC, +}; + struct sc27xx_adc_data { struct device *dev; + struct regulator *volref; struct regmap *regmap; /* * One hardware spinlock to synchronize between the multiple @@ -87,6 +103,7 @@ struct sc27xx_adc_data { * in the device data structure. */ struct sc27xx_adc_variant_data { + enum sc27xx_pmic_type pmic_type; u32 module_en; u32 clk_en; u32 scale_shift; @@ -188,6 +205,94 @@ static int sc27xx_adc_scale_calibration(struct sc27xx_adc_data *data, return 0; } +static int sc2720_adc_get_ratio(int channel, int scale) +{ + switch (channel) { + case 14: + switch (scale) { + case 0: + return SC27XX_VOLT_RATIO(68, 900); + case 1: + return SC27XX_VOLT_RATIO(68, 1760); + case 2: + return SC27XX_VOLT_RATIO(68, 2327); + case 3: + return SC27XX_VOLT_RATIO(68, 3654); + default: + return SC27XX_VOLT_RATIO(1, 1); + } + case 16: + switch (scale) { + case 0: + return SC27XX_VOLT_RATIO(48, 100); + case 1: + return SC27XX_VOLT_RATIO(480, 1955); + case 2: + return SC27XX_VOLT_RATIO(480, 2586); + case 3: + return SC27XX_VOLT_RATIO(48, 406); + default: + return SC27XX_VOLT_RATIO(1, 1); + } + case 21: + case 22: + case 23: + switch (scale) { + case 0: + return SC27XX_VOLT_RATIO(3, 8); + case 1: + return SC27XX_VOLT_RATIO(375, 1955); + case 2: + return SC27XX_VOLT_RATIO(375, 2586); + case 3: + return SC27XX_VOLT_RATIO(300, 3248); + default: + return SC27XX_VOLT_RATIO(1, 1); + } + default: + switch (scale) { + case 0: + return SC27XX_VOLT_RATIO(1, 1); + case 1: + return SC27XX_VOLT_RATIO(1000, 1955); + case 2: + return SC27XX_VOLT_RATIO(1000, 2586); + case 3: + return SC27XX_VOLT_RATIO(100, 406); + default: + return SC27XX_VOLT_RATIO(1, 1); + } + } + return SC27XX_VOLT_RATIO(1, 1); +} + +static int sc2721_adc_get_ratio(int channel, int scale) +{ + switch (channel) { + case 1: + case 2: + case 3: + case 4: + return scale ? SC27XX_VOLT_RATIO(400, 1025) : + SC27XX_VOLT_RATIO(1, 1); + case 5: + return SC27XX_VOLT_RATIO(7, 29); + case 7: + case 9: + return scale ? SC27XX_VOLT_RATIO(100, 125) : + SC27XX_VOLT_RATIO(1, 1); + case 14: + return SC27XX_VOLT_RATIO(68, 900); + case 16: + return SC27XX_VOLT_RATIO(48, 100); + case 19: + return SC27XX_VOLT_RATIO(1, 3); + default: + return SC27XX_VOLT_RATIO(1, 1); + } + return SC27XX_VOLT_RATIO(1, 1); +} + static int sc2731_adc_get_ratio(int channel, int scale) { switch (channel) { @@ -216,6 +321,34 @@ static int sc2731_adc_get_ratio(int channel, int scale) /* * According to the datasheet set specific value on some channel. */ +static void sc2720_adc_scale_init(struct sc27xx_adc_data *data) +{ + int i; + + for (i = 0; i < SC27XX_ADC_CHANNEL_MAX; i++) { + switch (i) { + case 5: + data->channel_scale[i] = 3; + break; + case 7: + case 9: + data->channel_scale[i] = 2; + break; + case 13: + data->channel_scale[i] = 1; + break; + case 19: + case 30: + case 31: + data->channel_scale[i] = 3; + break; + default: + data->channel_scale[i] = 0; + break; + } + } +} + static void sc2731_adc_scale_init(struct sc27xx_adc_data *data) { int i; @@ -231,7 +364,7 @@ static void sc2731_adc_scale_init(struct sc27xx_adc_data *data) static int sc27xx_adc_read(struct sc27xx_adc_data *data, int channel, int scale, int *val) { - int ret; + int ret, ret_volref; u32 tmp, value, status; ret = hwspin_lock_timeout_raw(data->hwlock, SC27XX_ADC_HWLOCK_TIMEOUT); @@ -240,6 +373,22 @@ static int sc27xx_adc_read(struct sc27xx_adc_data *data, int channel, return ret; } + /* + * According to the sc2721 chip data sheet, the reference voltage of + * specific channel 30 and channel 31 in ADC module needs to be set from + * the default 2.8v to 3.5v. + */ + if ((data->var_data->pmic_type == SC2721_ADC) && (channel == 30 || channel == 31)) { + ret = regulator_set_voltage(data->volref, + SC27XX_ADC_REFVOL_VDD35, + SC27XX_ADC_REFVOL_VDD35); + if (ret) { + dev_err(data->dev, "failed to set the volref 3.5V\n"); + hwspin_unlock_raw(data->hwlock); + return ret; + } + } + ret = regmap_update_bits(data->regmap, data->base + SC27XX_ADC_CTL, SC27XX_ADC_EN, SC27XX_ADC_EN); if (ret) @@ -294,6 +443,18 @@ static int sc27xx_adc_read(struct sc27xx_adc_data *data, int channel, regmap_update_bits(data->regmap, data->base + SC27XX_ADC_CTL, SC27XX_ADC_EN, 0); unlock_adc: + if (data->var_data->pmic_type == SC2721_ADC) { + if ((channel == 30) || (channel == 31)) { + ret_volref = regulator_set_voltage(data->volref, + SC27XX_ADC_REFVOL_VDD28, + SC27XX_ADC_REFVOL_VDD28); + if (ret_volref) { + dev_err(data->dev, "failed to set the volref 2.8V, ret_volref = 0x%x\n,ret_volref"); + ret = ret || ret_volref; + } + } + } + hwspin_unlock_raw(data->hwlock); if (!ret) @@ -523,6 +684,7 @@ static void sc27xx_adc_disable(void *_data) } static const struct sc27xx_adc_variant_data sc2731_data = { + .pmic_type = SC27XX_ADC, .module_en = SC2731_MODULE_EN, .clk_en = SC2731_ARM_CLK_EN, .scale_shift = SC27XX_ADC_SCALE_SHIFT, @@ -533,6 +695,30 @@ static const struct sc27xx_adc_variant_data sc2731_data = { .get_ratio = sc2731_adc_get_ratio, }; +static const struct sc27xx_adc_variant_data sc2721_data = { + .pmic_type = SC2721_ADC, + .module_en = SC2731_MODULE_EN, + .clk_en = SC2721_ARM_CLK_EN, + .scale_shift = SC2721_ADC_SCALE_SHIFT, + .scale_mask = SC2721_ADC_SCALE_MASK, + .bscale_cal = &sc2731_big_scale_graph_calib, + .sscale_cal = &sc2731_small_scale_graph_calib, + .init_scale = sc2731_adc_scale_init, + .get_ratio = sc2721_adc_get_ratio, +}; + +static const struct sc27xx_adc_variant_data sc2720_data = { + .pmic_type = SC27XX_ADC, + .module_en = SC2731_MODULE_EN, + .clk_en = SC2721_ARM_CLK_EN, + .scale_shift = SC27XX_ADC_SCALE_SHIFT, + .scale_mask = SC27XX_ADC_SCALE_MASK, + .bscale_cal = &big_scale_graph_calib, + .sscale_cal = &small_scale_graph_calib, + .init_scale = sc2720_adc_scale_init, + .get_ratio = sc2720_adc_get_ratio, +}; + static int sc27xx_adc_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -583,6 +769,17 @@ static int sc27xx_adc_probe(struct platform_device *pdev) } sc27xx_data->dev = dev; + if (pdata->pmic_type == SC2721_ADC) { + sc27xx_data->volref = devm_regulator_get_optional(dev, "vref"); + if (IS_ERR(sc27xx_data->volref)) { + ret = PTR_ERR(sc27xx_data->volref); + if (ret == -ENODEV) + dev_err(dev, "failed to supply the regulator\n"); + dev_err(dev, "failed to get ADC volref, the err volref: %d\n", ret); + return ret; + } + } + sc27xx_data->var_data = pdata; sc27xx_data->var_data->init_scale(sc27xx_data); @@ -612,6 +809,8 @@ static int sc27xx_adc_probe(struct platform_device *pdev) static const struct of_device_id sc27xx_adc_of_match[] = { { .compatible = "sprd,sc2731-adc", .data = &sc2731_data}, + { .compatible = "sprd,sc2721-adc", .data = &sc2721_data}, + { .compatible = "sprd,sc2720-adc", .data = &sc2720_data}, { } }; MODULE_DEVICE_TABLE(of, sc27xx_adc_of_match);