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drivers: pinctrl: ITE: Add a property configure pin current strength

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Add the property of drive-strength to drive a high or low current
selection. If this property is not configured, it is the default
setting. According to the SPEC, the default drive current selection
varies from different pins.
Define the high level 0b: 8mA
           low  level 1b: 4mA or 2mA

Signed-off-by: Tim Lin <tim2.lin@ite.corp-partner.google.com>
This commit is contained in:
Tim Lin 2024-05-29 20:44:15 +08:00 • committed by Carles Cufí
commit 76ced4a82d
5 changed files with 98 additions and 27 deletions
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18
soc/ite/ec/common/pinctrl_soc.h
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@ -42,6 +42,8 @@ typedef struct pinctrl_soc_pin pinctrl_soc_pin_t;
* Pin voltage selection [ 8 ]
* Pin input enable config [ 12 ]
* Pin push-pull/open-drain [ 16 ]
* Pin drive current high/low[ 20 ]
* Pin drive current default [ 21 ]
*/
#define IT8XXX2_HIGH_IMPEDANCE 0x1U
#define IT8XXX2_PULL_PIN_DEFAULT 0x0U
@ -52,6 +54,8 @@ typedef struct pinctrl_soc_pin pinctrl_soc_pin_t;
#define IT8XXX2_INPUT_ENABLE 0x1U
#define IT8XXX2_PUSH_PULL 0x0U
#define IT8XXX2_OPEN_DRAIN 0x1U
#define IT8XXX2_DRIVE_STRENGTH 0x1U
#define IT8XXX2_DRIVE_DEFAULT 0x2U
/* Pin tri-state mode. */
#define IT8XXX2_IMPEDANCE_SHIFT 0U
@ -69,6 +73,9 @@ typedef struct pinctrl_soc_pin pinctrl_soc_pin_t;
/* Pin push-pull/open-drain mode */
#define IT8XXX2_PP_OD_SHIFT 16U
#define IT8XXX2_PP_OD_MASK BIT_MASK(1)
/* Pin driving select control */
#define IT8XXX2_PDSCX_SHIFT 20U
#define IT8XXX2_PDSCX_MASK BIT_MASK(2)
/**
* @brief Utility macro to obtain configuration of tri-state.
@ -106,6 +113,12 @@ typedef struct pinctrl_soc_pin pinctrl_soc_pin_t;
#define IT8XXX2_DT_PINCFG_PP_OD(__mode) \
(((__mode) >> IT8XXX2_PP_OD_SHIFT) & IT8XXX2_PP_OD_MASK)
/**
* @brief Utility macro to obtain configuration of driving current selection.
*/
#define IT8XXX2_DT_PINCFG_DRIVE_CURRENT(__mode) \
(((__mode) >> IT8XXX2_PDSCX_SHIFT) & IT8XXX2_PDSCX_MASK)
/**
* @brief Utility macro to initialize pincfg field in #pinctrl_pin_t.
*
@ -125,7 +138,10 @@ typedef struct pinctrl_soc_pin pinctrl_soc_pin_t;
((IT8XXX2_INPUT_ENABLE * DT_PROP(node_id, input_enable)) \
<< IT8XXX2_INPUT_SHIFT) | \
((IT8XXX2_OPEN_DRAIN * DT_PROP(node_id, drive_open_drain)) \
<< IT8XXX2_PP_OD_SHIFT))
<< IT8XXX2_PP_OD_SHIFT) | \
((IT8XXX2_DRIVE_STRENGTH * \
DT_ENUM_IDX_OR(node_id, drive_strength, IT8XXX2_DRIVE_DEFAULT)) \
<< IT8XXX2_PDSCX_SHIFT))
/**
* @brief Utility macro to initialize pinctrls of pinmuxs field in #pinctrl_pin_t.