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497 lines
14 KiB
497 lines
14 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Copyright (C) 2016 Socionext Inc. |
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* Author: Masahiro Yamada <[email protected]> |
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*/ |
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#include <linux/mfd/syscon.h> |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/of_device.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.h> |
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#include <linux/reset-controller.h> |
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struct uniphier_reset_data { |
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unsigned int id; |
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unsigned int reg; |
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unsigned int bit; |
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unsigned int flags; |
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#define UNIPHIER_RESET_ACTIVE_LOW BIT(0) |
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}; |
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#define UNIPHIER_RESET_ID_END (unsigned int)(-1) |
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#define UNIPHIER_RESET_END \ |
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{ .id = UNIPHIER_RESET_ID_END } |
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#define UNIPHIER_RESET(_id, _reg, _bit) \ |
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{ \ |
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.id = (_id), \ |
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.reg = (_reg), \ |
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.bit = (_bit), \ |
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} |
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#define UNIPHIER_RESETX(_id, _reg, _bit) \ |
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{ \ |
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.id = (_id), \ |
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.reg = (_reg), \ |
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.bit = (_bit), \ |
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.flags = UNIPHIER_RESET_ACTIVE_LOW, \ |
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} |
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/* System reset data */ |
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static const struct uniphier_reset_data uniphier_ld4_sys_reset_data[] = { |
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UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */ |
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UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC (Ether, HSC, MIO) */ |
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UNIPHIER_RESET_END, |
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}; |
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static const struct uniphier_reset_data uniphier_pro4_sys_reset_data[] = { |
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UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */ |
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UNIPHIER_RESETX(6, 0x2000, 12), /* Ether */ |
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UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC (HSC, MIO, RLE) */ |
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UNIPHIER_RESETX(12, 0x2000, 6), /* GIO (Ether, SATA, USB3) */ |
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UNIPHIER_RESETX(14, 0x2000, 17), /* USB30 */ |
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UNIPHIER_RESETX(15, 0x2004, 17), /* USB31 */ |
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UNIPHIER_RESETX(28, 0x2000, 18), /* SATA0 */ |
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UNIPHIER_RESETX(29, 0x2004, 18), /* SATA1 */ |
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UNIPHIER_RESETX(30, 0x2000, 19), /* SATA-PHY */ |
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UNIPHIER_RESETX(40, 0x2000, 13), /* AIO */ |
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UNIPHIER_RESET_END, |
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}; |
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static const struct uniphier_reset_data uniphier_pro5_sys_reset_data[] = { |
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UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */ |
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UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC (HSC) */ |
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UNIPHIER_RESETX(12, 0x2000, 6), /* GIO (PCIe, USB3) */ |
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UNIPHIER_RESETX(14, 0x2000, 17), /* USB30 */ |
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UNIPHIER_RESETX(15, 0x2004, 17), /* USB31 */ |
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UNIPHIER_RESETX(24, 0x2008, 2), /* PCIe */ |
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UNIPHIER_RESETX(40, 0x2000, 13), /* AIO */ |
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UNIPHIER_RESET_END, |
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}; |
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static const struct uniphier_reset_data uniphier_pxs2_sys_reset_data[] = { |
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UNIPHIER_RESETX(2, 0x2000, 2), /* NAND */ |
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UNIPHIER_RESETX(6, 0x2000, 12), /* Ether */ |
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UNIPHIER_RESETX(8, 0x2000, 10), /* STDMAC (HSC, RLE) */ |
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UNIPHIER_RESETX(14, 0x2000, 17), /* USB30 */ |
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UNIPHIER_RESETX(15, 0x2004, 17), /* USB31 */ |
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UNIPHIER_RESETX(16, 0x2014, 4), /* USB30-PHY0 */ |
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UNIPHIER_RESETX(17, 0x2014, 0), /* USB30-PHY1 */ |
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UNIPHIER_RESETX(18, 0x2014, 2), /* USB30-PHY2 */ |
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UNIPHIER_RESETX(20, 0x2014, 5), /* USB31-PHY0 */ |
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UNIPHIER_RESETX(21, 0x2014, 1), /* USB31-PHY1 */ |
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UNIPHIER_RESETX(28, 0x2014, 12), /* SATA */ |
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UNIPHIER_RESET(30, 0x2014, 8), /* SATA-PHY (active high) */ |
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UNIPHIER_RESETX(40, 0x2000, 13), /* AIO */ |
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UNIPHIER_RESET_END, |
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}; |
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static const struct uniphier_reset_data uniphier_ld11_sys_reset_data[] = { |
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UNIPHIER_RESETX(2, 0x200c, 0), /* NAND */ |
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UNIPHIER_RESETX(4, 0x200c, 2), /* eMMC */ |
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UNIPHIER_RESETX(6, 0x200c, 6), /* Ether */ |
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UNIPHIER_RESETX(8, 0x200c, 8), /* STDMAC (HSC, MIO) */ |
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UNIPHIER_RESETX(9, 0x200c, 9), /* HSC */ |
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UNIPHIER_RESETX(40, 0x2008, 0), /* AIO */ |
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UNIPHIER_RESETX(41, 0x2008, 1), /* EVEA */ |
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UNIPHIER_RESETX(42, 0x2010, 2), /* EXIV */ |
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UNIPHIER_RESET_END, |
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}; |
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static const struct uniphier_reset_data uniphier_ld20_sys_reset_data[] = { |
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UNIPHIER_RESETX(2, 0x200c, 0), /* NAND */ |
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UNIPHIER_RESETX(4, 0x200c, 2), /* eMMC */ |
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UNIPHIER_RESETX(6, 0x200c, 6), /* Ether */ |
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UNIPHIER_RESETX(8, 0x200c, 8), /* STDMAC (HSC) */ |
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UNIPHIER_RESETX(9, 0x200c, 9), /* HSC */ |
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UNIPHIER_RESETX(14, 0x200c, 5), /* USB30 */ |
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UNIPHIER_RESETX(16, 0x200c, 12), /* USB30-PHY0 */ |
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UNIPHIER_RESETX(17, 0x200c, 13), /* USB30-PHY1 */ |
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UNIPHIER_RESETX(18, 0x200c, 14), /* USB30-PHY2 */ |
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UNIPHIER_RESETX(19, 0x200c, 15), /* USB30-PHY3 */ |
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UNIPHIER_RESETX(24, 0x200c, 4), /* PCIe */ |
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UNIPHIER_RESETX(40, 0x2008, 0), /* AIO */ |
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UNIPHIER_RESETX(41, 0x2008, 1), /* EVEA */ |
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UNIPHIER_RESETX(42, 0x2010, 2), /* EXIV */ |
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UNIPHIER_RESET_END, |
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}; |
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static const struct uniphier_reset_data uniphier_pxs3_sys_reset_data[] = { |
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UNIPHIER_RESETX(2, 0x200c, 0), /* NAND */ |
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UNIPHIER_RESETX(4, 0x200c, 2), /* eMMC */ |
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UNIPHIER_RESETX(6, 0x200c, 9), /* Ether0 */ |
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UNIPHIER_RESETX(7, 0x200c, 10), /* Ether1 */ |
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UNIPHIER_RESETX(8, 0x200c, 12), /* STDMAC */ |
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UNIPHIER_RESETX(12, 0x200c, 4), /* USB30 link */ |
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UNIPHIER_RESETX(13, 0x200c, 5), /* USB31 link */ |
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UNIPHIER_RESETX(16, 0x200c, 16), /* USB30-PHY0 */ |
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UNIPHIER_RESETX(17, 0x200c, 18), /* USB30-PHY1 */ |
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UNIPHIER_RESETX(18, 0x200c, 20), /* USB30-PHY2 */ |
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UNIPHIER_RESETX(20, 0x200c, 17), /* USB31-PHY0 */ |
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UNIPHIER_RESETX(21, 0x200c, 19), /* USB31-PHY1 */ |
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UNIPHIER_RESETX(24, 0x200c, 3), /* PCIe */ |
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UNIPHIER_RESETX(28, 0x200c, 7), /* SATA0 */ |
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UNIPHIER_RESETX(29, 0x200c, 8), /* SATA1 */ |
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UNIPHIER_RESETX(30, 0x200c, 21), /* SATA-PHY */ |
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UNIPHIER_RESET_END, |
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}; |
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/* Media I/O reset data */ |
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#define UNIPHIER_MIO_RESET_SD(id, ch) \ |
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UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 0) |
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#define UNIPHIER_MIO_RESET_SD_BRIDGE(id, ch) \ |
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UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 26) |
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#define UNIPHIER_MIO_RESET_EMMC_HW_RESET(id, ch) \ |
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UNIPHIER_RESETX((id), 0x80 + 0x200 * (ch), 0) |
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#define UNIPHIER_MIO_RESET_USB2(id, ch) \ |
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UNIPHIER_RESETX((id), 0x114 + 0x200 * (ch), 0) |
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#define UNIPHIER_MIO_RESET_USB2_BRIDGE(id, ch) \ |
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UNIPHIER_RESETX((id), 0x110 + 0x200 * (ch), 24) |
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#define UNIPHIER_MIO_RESET_DMAC(id) \ |
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UNIPHIER_RESETX((id), 0x110, 17) |
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static const struct uniphier_reset_data uniphier_ld4_mio_reset_data[] = { |
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UNIPHIER_MIO_RESET_SD(0, 0), |
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UNIPHIER_MIO_RESET_SD(1, 1), |
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UNIPHIER_MIO_RESET_SD(2, 2), |
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UNIPHIER_MIO_RESET_SD_BRIDGE(3, 0), |
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UNIPHIER_MIO_RESET_SD_BRIDGE(4, 1), |
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UNIPHIER_MIO_RESET_SD_BRIDGE(5, 2), |
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UNIPHIER_MIO_RESET_EMMC_HW_RESET(6, 1), |
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UNIPHIER_MIO_RESET_DMAC(7), |
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UNIPHIER_MIO_RESET_USB2(8, 0), |
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UNIPHIER_MIO_RESET_USB2(9, 1), |
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UNIPHIER_MIO_RESET_USB2(10, 2), |
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UNIPHIER_MIO_RESET_USB2_BRIDGE(12, 0), |
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UNIPHIER_MIO_RESET_USB2_BRIDGE(13, 1), |
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UNIPHIER_MIO_RESET_USB2_BRIDGE(14, 2), |
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UNIPHIER_RESET_END, |
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}; |
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static const struct uniphier_reset_data uniphier_pro5_sd_reset_data[] = { |
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UNIPHIER_MIO_RESET_SD(0, 0), |
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UNIPHIER_MIO_RESET_SD(1, 1), |
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UNIPHIER_MIO_RESET_EMMC_HW_RESET(6, 1), |
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UNIPHIER_RESET_END, |
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}; |
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/* Peripheral reset data */ |
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#define UNIPHIER_PERI_RESET_UART(id, ch) \ |
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UNIPHIER_RESETX((id), 0x114, 19 + (ch)) |
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#define UNIPHIER_PERI_RESET_I2C(id, ch) \ |
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UNIPHIER_RESETX((id), 0x114, 5 + (ch)) |
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#define UNIPHIER_PERI_RESET_FI2C(id, ch) \ |
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UNIPHIER_RESETX((id), 0x114, 24 + (ch)) |
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#define UNIPHIER_PERI_RESET_SCSSI(id, ch) \ |
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UNIPHIER_RESETX((id), 0x110, 17 + (ch)) |
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#define UNIPHIER_PERI_RESET_MCSSI(id) \ |
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UNIPHIER_RESETX((id), 0x114, 14) |
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static const struct uniphier_reset_data uniphier_ld4_peri_reset_data[] = { |
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UNIPHIER_PERI_RESET_UART(0, 0), |
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UNIPHIER_PERI_RESET_UART(1, 1), |
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UNIPHIER_PERI_RESET_UART(2, 2), |
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UNIPHIER_PERI_RESET_UART(3, 3), |
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UNIPHIER_PERI_RESET_I2C(4, 0), |
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UNIPHIER_PERI_RESET_I2C(5, 1), |
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UNIPHIER_PERI_RESET_I2C(6, 2), |
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UNIPHIER_PERI_RESET_I2C(7, 3), |
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UNIPHIER_PERI_RESET_I2C(8, 4), |
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UNIPHIER_PERI_RESET_SCSSI(11, 0), |
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UNIPHIER_RESET_END, |
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}; |
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static const struct uniphier_reset_data uniphier_pro4_peri_reset_data[] = { |
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UNIPHIER_PERI_RESET_UART(0, 0), |
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UNIPHIER_PERI_RESET_UART(1, 1), |
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UNIPHIER_PERI_RESET_UART(2, 2), |
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UNIPHIER_PERI_RESET_UART(3, 3), |
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UNIPHIER_PERI_RESET_FI2C(4, 0), |
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UNIPHIER_PERI_RESET_FI2C(5, 1), |
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UNIPHIER_PERI_RESET_FI2C(6, 2), |
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UNIPHIER_PERI_RESET_FI2C(7, 3), |
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UNIPHIER_PERI_RESET_FI2C(8, 4), |
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UNIPHIER_PERI_RESET_FI2C(9, 5), |
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UNIPHIER_PERI_RESET_FI2C(10, 6), |
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UNIPHIER_PERI_RESET_SCSSI(11, 0), |
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UNIPHIER_PERI_RESET_SCSSI(12, 1), |
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UNIPHIER_PERI_RESET_SCSSI(13, 2), |
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UNIPHIER_PERI_RESET_SCSSI(14, 3), |
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UNIPHIER_PERI_RESET_MCSSI(15), |
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UNIPHIER_RESET_END, |
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}; |
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/* Analog signal amplifiers reset data */ |
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static const struct uniphier_reset_data uniphier_ld11_adamv_reset_data[] = { |
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UNIPHIER_RESETX(0, 0x10, 6), /* EVEA */ |
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UNIPHIER_RESET_END, |
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}; |
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/* core implementaton */ |
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struct uniphier_reset_priv { |
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struct reset_controller_dev rcdev; |
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struct device *dev; |
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struct regmap *regmap; |
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const struct uniphier_reset_data *data; |
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}; |
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#define to_uniphier_reset_priv(_rcdev) \ |
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container_of(_rcdev, struct uniphier_reset_priv, rcdev) |
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static int uniphier_reset_update(struct reset_controller_dev *rcdev, |
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unsigned long id, int assert) |
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{ |
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struct uniphier_reset_priv *priv = to_uniphier_reset_priv(rcdev); |
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const struct uniphier_reset_data *p; |
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for (p = priv->data; p->id != UNIPHIER_RESET_ID_END; p++) { |
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unsigned int mask, val; |
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if (p->id != id) |
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continue; |
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mask = BIT(p->bit); |
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if (assert) |
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val = mask; |
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else |
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val = ~mask; |
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if (p->flags & UNIPHIER_RESET_ACTIVE_LOW) |
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val = ~val; |
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return regmap_write_bits(priv->regmap, p->reg, mask, val); |
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} |
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dev_err(priv->dev, "reset_id=%lu was not handled\n", id); |
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return -EINVAL; |
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} |
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static int uniphier_reset_assert(struct reset_controller_dev *rcdev, |
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unsigned long id) |
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{ |
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return uniphier_reset_update(rcdev, id, 1); |
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} |
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static int uniphier_reset_deassert(struct reset_controller_dev *rcdev, |
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unsigned long id) |
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{ |
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return uniphier_reset_update(rcdev, id, 0); |
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} |
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static int uniphier_reset_status(struct reset_controller_dev *rcdev, |
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unsigned long id) |
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{ |
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struct uniphier_reset_priv *priv = to_uniphier_reset_priv(rcdev); |
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const struct uniphier_reset_data *p; |
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for (p = priv->data; p->id != UNIPHIER_RESET_ID_END; p++) { |
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unsigned int val; |
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int ret, asserted; |
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if (p->id != id) |
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continue; |
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ret = regmap_read(priv->regmap, p->reg, &val); |
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if (ret) |
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return ret; |
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asserted = !!(val & BIT(p->bit)); |
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if (p->flags & UNIPHIER_RESET_ACTIVE_LOW) |
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asserted = !asserted; |
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return asserted; |
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} |
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dev_err(priv->dev, "reset_id=%lu was not found\n", id); |
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return -EINVAL; |
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} |
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static const struct reset_control_ops uniphier_reset_ops = { |
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.assert = uniphier_reset_assert, |
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.deassert = uniphier_reset_deassert, |
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.status = uniphier_reset_status, |
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}; |
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static int uniphier_reset_probe(struct platform_device *pdev) |
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{ |
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struct device *dev = &pdev->dev; |
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struct uniphier_reset_priv *priv; |
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const struct uniphier_reset_data *p, *data; |
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struct regmap *regmap; |
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struct device_node *parent; |
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unsigned int nr_resets = 0; |
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data = of_device_get_match_data(dev); |
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if (WARN_ON(!data)) |
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return -EINVAL; |
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parent = of_get_parent(dev->of_node); /* parent should be syscon node */ |
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regmap = syscon_node_to_regmap(parent); |
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of_node_put(parent); |
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if (IS_ERR(regmap)) { |
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dev_err(dev, "failed to get regmap (error %ld)\n", |
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PTR_ERR(regmap)); |
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return PTR_ERR(regmap); |
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} |
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); |
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if (!priv) |
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return -ENOMEM; |
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for (p = data; p->id != UNIPHIER_RESET_ID_END; p++) |
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nr_resets = max(nr_resets, p->id + 1); |
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priv->rcdev.ops = &uniphier_reset_ops; |
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priv->rcdev.owner = dev->driver->owner; |
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priv->rcdev.of_node = dev->of_node; |
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priv->rcdev.nr_resets = nr_resets; |
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priv->dev = dev; |
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priv->regmap = regmap; |
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priv->data = data; |
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return devm_reset_controller_register(&pdev->dev, &priv->rcdev); |
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} |
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static const struct of_device_id uniphier_reset_match[] = { |
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/* System reset */ |
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{ |
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.compatible = "socionext,uniphier-ld4-reset", |
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.data = uniphier_ld4_sys_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-pro4-reset", |
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.data = uniphier_pro4_sys_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-sld8-reset", |
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.data = uniphier_ld4_sys_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-pro5-reset", |
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.data = uniphier_pro5_sys_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-pxs2-reset", |
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.data = uniphier_pxs2_sys_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-ld11-reset", |
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.data = uniphier_ld11_sys_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-ld20-reset", |
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.data = uniphier_ld20_sys_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-pxs3-reset", |
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.data = uniphier_pxs3_sys_reset_data, |
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}, |
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/* Media I/O reset, SD reset */ |
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{ |
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.compatible = "socionext,uniphier-ld4-mio-reset", |
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.data = uniphier_ld4_mio_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-pro4-mio-reset", |
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.data = uniphier_ld4_mio_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-sld8-mio-reset", |
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.data = uniphier_ld4_mio_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-pro5-sd-reset", |
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.data = uniphier_pro5_sd_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-pxs2-sd-reset", |
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.data = uniphier_pro5_sd_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-ld11-mio-reset", |
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.data = uniphier_ld4_mio_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-ld11-sd-reset", |
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.data = uniphier_pro5_sd_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-ld20-sd-reset", |
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.data = uniphier_pro5_sd_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-pxs3-sd-reset", |
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.data = uniphier_pro5_sd_reset_data, |
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}, |
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/* Peripheral reset */ |
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{ |
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.compatible = "socionext,uniphier-ld4-peri-reset", |
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.data = uniphier_ld4_peri_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-pro4-peri-reset", |
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.data = uniphier_pro4_peri_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-sld8-peri-reset", |
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.data = uniphier_ld4_peri_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-pro5-peri-reset", |
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.data = uniphier_pro4_peri_reset_data, |
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}, |
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{ |
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.compatible = "socionext,uniphier-pxs2-peri-reset", |
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.data = uniphier_pro4_peri_reset_data, |
|
}, |
|
{ |
|
.compatible = "socionext,uniphier-ld11-peri-reset", |
|
.data = uniphier_pro4_peri_reset_data, |
|
}, |
|
{ |
|
.compatible = "socionext,uniphier-ld20-peri-reset", |
|
.data = uniphier_pro4_peri_reset_data, |
|
}, |
|
{ |
|
.compatible = "socionext,uniphier-pxs3-peri-reset", |
|
.data = uniphier_pro4_peri_reset_data, |
|
}, |
|
/* Analog signal amplifiers reset */ |
|
{ |
|
.compatible = "socionext,uniphier-ld11-adamv-reset", |
|
.data = uniphier_ld11_adamv_reset_data, |
|
}, |
|
{ |
|
.compatible = "socionext,uniphier-ld20-adamv-reset", |
|
.data = uniphier_ld11_adamv_reset_data, |
|
}, |
|
{ /* sentinel */ } |
|
}; |
|
MODULE_DEVICE_TABLE(of, uniphier_reset_match); |
|
|
|
static struct platform_driver uniphier_reset_driver = { |
|
.probe = uniphier_reset_probe, |
|
.driver = { |
|
.name = "uniphier-reset", |
|
.of_match_table = uniphier_reset_match, |
|
}, |
|
}; |
|
module_platform_driver(uniphier_reset_driver); |
|
|
|
MODULE_AUTHOR("Masahiro Yamada <[email protected]>"); |
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MODULE_DESCRIPTION("UniPhier Reset Controller Driver"); |
|
MODULE_LICENSE("GPL");
|
|
|