1 // SPDX-License-Identifier: GPL-2.0
3  * Apple SoC SPMI device driver
10  *		hisi-spmi-controller.c
11  *		spmi-pmic-arb.c Copyright (c) 2021, The Linux Foundation.
19 #include <linux/spmi.h>
21 /* SPMI Controller Registers */
35 #define poll_reg(spmi, reg, val, cond) \  argument
36 	readl_poll_timeout((spmi)->regs + (reg), (val), (cond), \
41 	return opc | sid << 8 | saddr << 16 | (len - 1) | (1 << 15);  in apple_spmi_pack_cmd()
47 	struct apple_spmi *spmi = spmi_controller_get_drvdata(ctrl);  in apple_spmi_wait_rx_not_empty()  local
51 	ret = poll_reg(spmi, SPMI_STATUS_REG, status, !(status & SPMI_RX_FIFO_EMPTY));  in apple_spmi_wait_rx_not_empty()
53 		dev_err(&ctrl->dev,  in apple_spmi_wait_rx_not_empty()
64 	struct apple_spmi *spmi = spmi_controller_get_drvdata(ctrl);  in spmi_read_cmd()  local
71 	writel(spmi_cmd, spmi->regs + SPMI_CMD_REG);  in spmi_read_cmd()
77 	/* Discard SPMI reply status */  in spmi_read_cmd()
78 	readl(spmi->regs + SPMI_RSP_REG);  in spmi_read_cmd()
80 	/* Read SPMI data reply */  in spmi_read_cmd()
82 		rsp = readl(spmi->regs + SPMI_RSP_REG);  in spmi_read_cmd()
96 	struct apple_spmi *spmi = spmi_controller_get_drvdata(ctrl);  in spmi_write_cmd()  local
101 	writel(spmi_cmd, spmi->regs + SPMI_CMD_REG);  in spmi_write_cmd()
109 		writel(spmi_cmd, spmi->regs + SPMI_CMD_REG);  in spmi_write_cmd()
117 	readl(spmi->regs + SPMI_RSP_REG);  in spmi_write_cmd()
124 	struct apple_spmi *spmi;  in apple_spmi_probe()  local
128 	ctrl = devm_spmi_controller_alloc(&pdev->dev, sizeof(*spmi));  in apple_spmi_probe()
130 		return -ENOMEM;  in apple_spmi_probe()
132 	spmi = spmi_controller_get_drvdata(ctrl);  in apple_spmi_probe()
134 	spmi->regs = devm_platform_ioremap_resource(pdev, 0);  in apple_spmi_probe()
135 	if (IS_ERR(spmi->regs))  in apple_spmi_probe()
136 		return PTR_ERR(spmi->regs);  in apple_spmi_probe()
138 	ctrl->dev.of_node = pdev->dev.of_node;  in apple_spmi_probe()
140 	ctrl->read_cmd = spmi_read_cmd;  in apple_spmi_probe()
141 	ctrl->write_cmd = spmi_write_cmd;  in apple_spmi_probe()
143 	ret = devm_spmi_controller_add(&pdev->dev, ctrl);  in apple_spmi_probe()
145 		return dev_err_probe(&pdev->dev, ret,  in apple_spmi_probe()
152 	{ .compatible = "apple,spmi", },
160 		.name	= "apple-spmi",
166 MODULE_AUTHOR("Jean-Francois Bortolotti <jeff@borto.fr>");
167 MODULE_DESCRIPTION("Apple SoC SPMI driver");