^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) // Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/clk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/pm_runtime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define TI_UFS_SS_CTRL 0x4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define TI_UFS_SS_RST_N_PCS BIT(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define TI_UFS_SS_CLK_26MHZ BIT(4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static int ti_j721e_ufs_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct device *dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) unsigned long clk_rate;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) void __iomem *regbase;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct clk *clk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) u32 reg = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) regbase = devm_platform_ioremap_resource(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) if (IS_ERR(regbase))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) return PTR_ERR(regbase);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) pm_runtime_enable(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) ret = pm_runtime_get_sync(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) pm_runtime_put_noidle(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) goto disable_pm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /* Select MPHY refclk frequency */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) clk = devm_clk_get(dev, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) if (IS_ERR(clk)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) ret = PTR_ERR(clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) dev_err(dev, "Cannot claim MPHY clock.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) goto clk_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) clk_rate = clk_get_rate(clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (clk_rate == 26000000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) reg |= TI_UFS_SS_CLK_26MHZ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) devm_clk_put(dev, clk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) /* Take UFS slave device out of reset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) reg |= TI_UFS_SS_RST_N_PCS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) writel(reg, regbase + TI_UFS_SS_CTRL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) ret = of_platform_populate(pdev->dev.of_node, NULL, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) dev_err(dev, "failed to populate child nodes %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) goto clk_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) clk_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) pm_runtime_put_sync(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) disable_pm:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) pm_runtime_disable(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static int ti_j721e_ufs_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) of_platform_depopulate(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) pm_runtime_put_sync(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) pm_runtime_disable(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static const struct of_device_id ti_j721e_ufs_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) .compatible = "ti,j721e-ufs",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static struct platform_driver ti_j721e_ufs_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) .probe = ti_j721e_ufs_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .remove = ti_j721e_ufs_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) .name = "ti-j721e-ufs",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .of_match_table = ti_j721e_ufs_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) module_platform_driver(ti_j721e_ufs_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) MODULE_AUTHOR("Vignesh Raghavendra <vigneshr@ti.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) MODULE_DESCRIPTION("TI UFS host controller glue driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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