mt6589: Pinctrl v2 driver

[akku1139]

No description provided.

[akku1139]

9f74dcf 676a820
wrong subsystem

[akku1139]

there are no users in downstream, and mainline.

https://github.com/bq/aquaris-5/blob/bc1d0d0e35c969670e2d869001be944ad0c9c5e5/mediatek/platform/mt6589/kernel/drivers/mmc-host/sd.c#L1192-L1230

static const struct mtk_pin_field_calc mt6589_pin_tdsel_range[] = {
	/* CON0 */
	PIN_FIELD_CALC(_s_pin, _e_pin, 0, 0x0700, 0x0, _s_bit, 3, 32, 0),
	/* CON1 */
	PIN_FIELD_CALC(_s_pin, _e_pin, 0, 0x0710, 0x0, _s_bit, 3, 32, 0),
	/* CON2 */
	PIN_FIELD_CALC(_s_pin, _e_pin, 0, 0x0720, 0x0, _s_bit, 3, 32, 0),
	/* CON3 */
	PIN_FIELD_CALC(_s_pin, _e_pin, 0, 0x0730, 0x0, _s_bit, 3, 32, 0),
	/* CON4 */
	PIN_FIELD_CALC(_s_pin, _e_pin, 0, 0x0740, 0x0, _s_bit, 3, 32, 0),
	/* CON5 */
	PIN_FIELD_CALC(_s_pin, _e_pin, 0, 0x0750, 0x0, _s_bit, 3, 32, 0),
	/* CON6 */
	PIN_FIELD_CALC(_s_pin, _e_pin, 1, 0x0760, 0x0, _s_bit, 3, 32, 0),
	/* CON7 */
	PIN_FIELD_CALC(_s_pin, _e_pin, 1, 0x0770, 0x0, _s_bit, 3, 32, 0),
	/* CON8 */
	PIN_FIELD_CALC(_s_pin, _e_pin, 0, 0x0780, 0x0, _s_bit, 3, 32, 0),
	/* CON9 */
	PIN_FIELD_CALC(_s_pin, _e_pin, 0, 0x0790, 0x0, _s_bit, 3, 32, 0),
};

static const struct mtk_pin_field_calc mt6589_pin_rdsel_range[] = {
};

[PINCTRL_PIN_REG_TDSEL] = MTK_RANGE(mt6589_pin_tdsel_range),
[PINCTRL_PIN_REG_RDSEL] = MTK_RANGE(mt6589_pin_rdsel_range),

[akku1139]

/*
 * mt6589_drv_grp: DRV_GRP
 * grp 0: DRV_GRP4
 * grp 1: DRV_GRP1
 * grp 2: DRV_GRP3
 * grp 3: DRV_GRP5
 */

linux/drivers/pinctrl/mediatek/pinctrl-mt6589.c

Lines 19 to 34 in 7b7bf7a

	/*
	* E2, E4, E8, E16: Drive
	* SR: ???
	* DM: Dummy
	* MSB <-> LSB
	*/
	static const struct mtk_drv_group_desc mt6589_drv_grp[] = {
	/* grp 0: SR E8 E4 E2: 2/4/6/8/10/12/14/16mA */
	MTK_DRV_GRP(2, 16, 0, 2, 2),
	/* grp 1: SR E8 E4 DM: 4/8/12/16mA */
	MTK_DRV_GRP(4, 16, 1, 2, 4),
	/* grp 2: SR E4 E2 DM: 2/4/6/8mA */
	MTK_DRV_GRP(2, 8, 1, 2, 2),
	/* grp 3: SR E16 E8 E4 4/8/12/16/20/24/28/32mA */
	MTK_DRV_GRP(4, 32, 0, 2, 4),
	};

linux/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c

Lines 22 to 47 in b0edaf6

	/**
	* struct mtk_drive_desc - the structure that holds the information
	* of the driving current
	* @min: the minimum current of this group
	* @max: the maximum current of this group
	* @step: the step current of this group
	* @scal: the weight factor
	*
	* formula: output = ((input) / step - 1) * scal
	*/
	struct mtk_drive_desc {
	u8 min;
	u8 max;
	u8 step;
	u8 scal;
	};
	/* The groups of drive strength */
	static const struct mtk_drive_desc mtk_drive[] = {
	[DRV_GRP0] = { 4, 16, 4, 1 },
	[DRV_GRP1] = { 4, 16, 4, 2 },
	[DRV_GRP2] = { 2, 8, 2, 1 },
	[DRV_GRP3] = { 2, 8, 2, 2 },
	[DRV_GRP4] = { 2, 16, 2, 1 },
	[DRV_GRP5] = { 4, 32, 4, 1 },
	};

[akku1139]

note: MT6589's pullen means R1