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@@ -0,0 +1,440 @@
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+/*
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+ * Copyright (C) 2016 Socionext Inc.
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+ * Author: Masahiro Yamada <yamada.masahiro@socionext.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU General Public License for more details.
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+ */
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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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+
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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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+
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+#define UNIPHIER_RESET_ID_END (unsigned int)(-1)
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+
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+#define UNIPHIER_RESET_END \
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+ { .id = UNIPHIER_RESET_ID_END }
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+
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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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+
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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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+
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+/* System reset data */
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+#define UNIPHIER_SLD3_SYS_RESET_STDMAC(id) \
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+ UNIPHIER_RESETX((id), 0x2000, 10)
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+
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+#define UNIPHIER_LD11_SYS_RESET_STDMAC(id) \
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+ UNIPHIER_RESETX((id), 0x200c, 8)
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+
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+#define UNIPHIER_PRO4_SYS_RESET_GIO(id) \
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+ UNIPHIER_RESETX((id), 0x2000, 6)
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+
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+#define UNIPHIER_LD20_SYS_RESET_GIO(id) \
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+ UNIPHIER_RESETX((id), 0x200c, 5)
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+
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+#define UNIPHIER_PRO4_SYS_RESET_USB3(id, ch) \
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+ UNIPHIER_RESETX((id), 0x2000 + 0x4 * (ch), 17)
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+
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+const struct uniphier_reset_data uniphier_sld3_sys_reset_data[] = {
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+ UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* Ether, HSC, MIO */
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+ UNIPHIER_RESET_END,
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+};
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+
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+const struct uniphier_reset_data uniphier_pro4_sys_reset_data[] = {
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+ UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* HSC, MIO, RLE */
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+ UNIPHIER_PRO4_SYS_RESET_GIO(12), /* Ether, SATA, USB3 */
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+ UNIPHIER_PRO4_SYS_RESET_USB3(14, 0),
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+ UNIPHIER_PRO4_SYS_RESET_USB3(15, 1),
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+ UNIPHIER_RESET_END,
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+};
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+
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+const struct uniphier_reset_data uniphier_pro5_sys_reset_data[] = {
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+ UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* HSC */
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+ UNIPHIER_PRO4_SYS_RESET_GIO(12), /* PCIe, USB3 */
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+ UNIPHIER_PRO4_SYS_RESET_USB3(14, 0),
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+ UNIPHIER_PRO4_SYS_RESET_USB3(15, 1),
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+ UNIPHIER_RESET_END,
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+};
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+
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+const struct uniphier_reset_data uniphier_pxs2_sys_reset_data[] = {
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+ UNIPHIER_SLD3_SYS_RESET_STDMAC(8), /* HSC, RLE */
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+ UNIPHIER_PRO4_SYS_RESET_USB3(14, 0),
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+ UNIPHIER_PRO4_SYS_RESET_USB3(15, 1),
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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(29, 0x2014, 8), /* SATA-PHY (active high) */
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+ UNIPHIER_RESET_END,
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+};
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+
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+const struct uniphier_reset_data uniphier_ld11_sys_reset_data[] = {
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+ UNIPHIER_LD11_SYS_RESET_STDMAC(8), /* HSC, MIO */
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+ UNIPHIER_RESET_END,
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+};
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+
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+const struct uniphier_reset_data uniphier_ld20_sys_reset_data[] = {
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+ UNIPHIER_LD11_SYS_RESET_STDMAC(8), /* HSC */
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+ UNIPHIER_LD20_SYS_RESET_GIO(12), /* PCIe, USB3 */
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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_RESET_END,
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+};
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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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+
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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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+
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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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+
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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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+
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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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+
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+#define UNIPHIER_MIO_RESET_DMAC(id) \
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+ UNIPHIER_RESETX((id), 0x110, 17)
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+
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+const struct uniphier_reset_data uniphier_sld3_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(11, 3),
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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_MIO_RESET_USB2_BRIDGE(15, 3),
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+ UNIPHIER_RESET_END,
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+};
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+
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+const struct uniphier_reset_data uniphier_pro5_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_EMMC_HW_RESET(6, 1),
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+ UNIPHIER_RESET_END,
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+};
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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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+
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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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+
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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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+
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+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_RESET_END,
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+};
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+
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+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_RESET_END,
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+};
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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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+
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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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+
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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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+
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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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+
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+ if (p->id != id)
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+ continue;
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+
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+ mask = BIT(p->bit);
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+
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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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+
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+ if (p->flags & UNIPHIER_RESET_ACTIVE_LOW)
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+ val = ~val;
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+
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+ return regmap_write_bits(priv->regmap, p->reg, mask, val);
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+ }
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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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+
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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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+
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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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+
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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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+
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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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+
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+ if (p->id != id)
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+ continue;
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+
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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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+
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+ asserted = !!(val & BIT(p->bit));
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+
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+ if (p->flags & UNIPHIER_RESET_ACTIVE_LOW)
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+ asserted = !asserted;
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+
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+ return asserted;
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+ }
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ return devm_reset_controller_register(&pdev->dev, &priv->rcdev);
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+}
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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-sld3-reset",
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+ .data = uniphier_sld3_sys_reset_data,
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+ },
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+ {
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+ .compatible = "socionext,uniphier-ld4-reset",
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+ .data = uniphier_sld3_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_sld3_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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+ },
|
|
|
+ {
|
|
|
+ .compatible = "socionext,uniphier-ld20-reset",
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|
|
+ .data = uniphier_ld20_sys_reset_data,
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|
|
+ },
|
|
|
+ /* Media I/O reset */
|
|
|
+ {
|
|
|
+ .compatible = "socionext,uniphier-sld3-mio-reset",
|
|
|
+ .data = uniphier_sld3_mio_reset_data,
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|
|
+ },
|
|
|
+ {
|
|
|
+ .compatible = "socionext,uniphier-ld4-mio-reset",
|
|
|
+ .data = uniphier_sld3_mio_reset_data,
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .compatible = "socionext,uniphier-pro4-mio-reset",
|
|
|
+ .data = uniphier_sld3_mio_reset_data,
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .compatible = "socionext,uniphier-sld8-mio-reset",
|
|
|
+ .data = uniphier_sld3_mio_reset_data,
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .compatible = "socionext,uniphier-pro5-mio-reset",
|
|
|
+ .data = uniphier_pro5_mio_reset_data,
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .compatible = "socionext,uniphier-pxs2-mio-reset",
|
|
|
+ .data = uniphier_pro5_mio_reset_data,
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .compatible = "socionext,uniphier-ld11-mio-reset",
|
|
|
+ .data = uniphier_sld3_mio_reset_data,
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .compatible = "socionext,uniphier-ld20-mio-reset",
|
|
|
+ .data = uniphier_pro5_mio_reset_data,
|
|
|
+ },
|
|
|
+ /* Peripheral reset */
|
|
|
+ {
|
|
|
+ .compatible = "socionext,uniphier-ld4-peri-reset",
|
|
|
+ .data = uniphier_ld4_peri_reset_data,
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .compatible = "socionext,uniphier-pro4-peri-reset",
|
|
|
+ .data = uniphier_pro4_peri_reset_data,
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .compatible = "socionext,uniphier-sld8-peri-reset",
|
|
|
+ .data = uniphier_ld4_peri_reset_data,
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .compatible = "socionext,uniphier-pro5-peri-reset",
|
|
|
+ .data = uniphier_pro4_peri_reset_data,
|
|
|
+ },
|
|
|
+ {
|
|
|
+ .compatible = "socionext,uniphier-pxs2-peri-reset",
|
|
|
+ .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,
|
|
|
+ },
|
|
|
+ { /* 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 <yamada.masahiro@socionext.com>");
|
|
|
+MODULE_DESCRIPTION("UniPhier Reset Controller Driver");
|
|
|
+MODULE_LICENSE("GPL");
|
Arnd Bergmann