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author | Mateusz Kulikowski <mateusz.kulikowski@gmail.com> | 2016-03-31 23:12:30 +0200 |
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committer | Tom Rini <trini@konsulko.com> | 2016-04-01 17:18:13 -0400 |
commit | c2f74c8f53bd2333d85d5063e9d043382df2a987 (patch) | |
tree | be7b271f616bb6e5eb18aa2dec5b8075b15d9285 /drivers/power/pmic/pm8916.c | |
parent | 5b47271c18e107408b40198420ea484b44b927a9 (diff) | |
download | u-boot-imx-c2f74c8f53bd2333d85d5063e9d043382df2a987.zip u-boot-imx-c2f74c8f53bd2333d85d5063e9d043382df2a987.tar.gz u-boot-imx-c2f74c8f53bd2333d85d5063e9d043382df2a987.tar.bz2 |
pmic: Add support for Qualcomm PM8916 PMIC
This PMIC is connected on SPMI bus so needs SPMI support enabled.
Signed-off-by: Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/power/pmic/pm8916.c')
-rw-r--r-- | drivers/power/pmic/pm8916.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/drivers/power/pmic/pm8916.c b/drivers/power/pmic/pm8916.c new file mode 100644 index 0000000..9acf5f5 --- /dev/null +++ b/drivers/power/pmic/pm8916.c @@ -0,0 +1,96 @@ +/* + * Qualcomm pm8916 pmic driver + * + * (C) Copyright 2015 Mateusz Kulikowski <mateusz.kulikowski@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#include <common.h> +#include <dm.h> +#include <dm/root.h> +#include <power/pmic.h> +#include <spmi/spmi.h> + +DECLARE_GLOBAL_DATA_PTR; + +#define PID_SHIFT 8 +#define PID_MASK (0xFF << PID_SHIFT) +#define REG_MASK 0xFF + +struct pm8916_priv { + uint16_t usid; /* Slave ID on SPMI bus */ +}; + +static int pm8916_reg_count(struct udevice *dev) +{ + return 0xFFFF; +} + +static int pm8916_write(struct udevice *dev, uint reg, const uint8_t *buff, + int len) +{ + struct pm8916_priv *priv = dev_get_priv(dev); + + if (len != 1) + return -EINVAL; + + return spmi_reg_write(dev->parent, priv->usid, + (reg & PID_MASK) >> PID_SHIFT, reg & REG_MASK, + *buff); +} + +static int pm8916_read(struct udevice *dev, uint reg, uint8_t *buff, int len) +{ + struct pm8916_priv *priv = dev_get_priv(dev); + int val; + + if (len != 1) + return -EINVAL; + + val = spmi_reg_read(dev->parent, priv->usid, + (reg & PID_MASK) >> PID_SHIFT, reg & REG_MASK); + + if (val < 0) + return val; + *buff = val; + return 0; +} + +static struct dm_pmic_ops pm8916_ops = { + .reg_count = pm8916_reg_count, + .read = pm8916_read, + .write = pm8916_write, +}; + +static const struct udevice_id pm8916_ids[] = { + { .compatible = "qcom,spmi-pmic" }, + { } +}; + +static int pm8916_probe(struct udevice *dev) +{ + struct pm8916_priv *priv = dev_get_priv(dev); + + priv->usid = dev_get_addr(dev); + + if (priv->usid == FDT_ADDR_T_NONE) + return -EINVAL; + + return 0; +} + + +static int pm8916_bind(struct udevice *dev) +{ + return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false); +} + +U_BOOT_DRIVER(pmic_pm8916) = { + .name = "pmic_pm8916", + .id = UCLASS_PMIC, + .of_match = pm8916_ids, + .bind = pm8916_bind, + .probe = pm8916_probe, + .ops = &pm8916_ops, + .priv_auto_alloc_size = sizeof(struct pm8916_priv), +}; |