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09bdcd6e17
PTR_ERR should access the value just tested by IS_ERR, otherwise
the wrong error code will be returned.
Fixes: 783ab76ae5 ("clk: sunxi-ng: Add A80 Display Engine CCU")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
284 lines
8.5 KiB
C
284 lines
8.5 KiB
C
/*
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* Copyright (c) 2016 Chen-Yu Tsai. All rights reserved.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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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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#include <linux/clk.h>
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#include <linux/clk-provider.h>
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#include <linux/of_address.h>
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#include <linux/platform_device.h>
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#include <linux/reset.h>
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#include "ccu_common.h"
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#include "ccu_div.h"
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#include "ccu_gate.h"
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#include "ccu_reset.h"
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#include "ccu-sun9i-a80-de.h"
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static SUNXI_CCU_GATE(fe0_clk, "fe0", "fe0-div",
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0x00, BIT(0), 0);
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static SUNXI_CCU_GATE(fe1_clk, "fe1", "fe1-div",
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0x00, BIT(1), 0);
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static SUNXI_CCU_GATE(fe2_clk, "fe2", "fe2-div",
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0x00, BIT(2), 0);
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static SUNXI_CCU_GATE(iep_deu0_clk, "iep-deu0", "de",
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0x00, BIT(4), 0);
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static SUNXI_CCU_GATE(iep_deu1_clk, "iep-deu1", "de",
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0x00, BIT(5), 0);
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static SUNXI_CCU_GATE(be0_clk, "be0", "be0-div",
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0x00, BIT(8), 0);
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static SUNXI_CCU_GATE(be1_clk, "be1", "be1-div",
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0x00, BIT(9), 0);
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static SUNXI_CCU_GATE(be2_clk, "be2", "be2-div",
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0x00, BIT(10), 0);
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static SUNXI_CCU_GATE(iep_drc0_clk, "iep-drc0", "de",
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0x00, BIT(12), 0);
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static SUNXI_CCU_GATE(iep_drc1_clk, "iep-drc1", "de",
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0x00, BIT(13), 0);
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static SUNXI_CCU_GATE(merge_clk, "merge", "de",
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0x00, BIT(20), 0);
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static SUNXI_CCU_GATE(dram_fe0_clk, "dram-fe0", "sdram",
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0x04, BIT(0), 0);
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static SUNXI_CCU_GATE(dram_fe1_clk, "dram-fe1", "sdram",
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0x04, BIT(1), 0);
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static SUNXI_CCU_GATE(dram_fe2_clk, "dram-fe2", "sdram",
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0x04, BIT(2), 0);
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static SUNXI_CCU_GATE(dram_deu0_clk, "dram-deu0", "sdram",
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0x04, BIT(4), 0);
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static SUNXI_CCU_GATE(dram_deu1_clk, "dram-deu1", "sdram",
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0x04, BIT(5), 0);
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static SUNXI_CCU_GATE(dram_be0_clk, "dram-be0", "sdram",
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0x04, BIT(8), 0);
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static SUNXI_CCU_GATE(dram_be1_clk, "dram-be1", "sdram",
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0x04, BIT(9), 0);
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static SUNXI_CCU_GATE(dram_be2_clk, "dram-be2", "sdram",
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0x04, BIT(10), 0);
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static SUNXI_CCU_GATE(dram_drc0_clk, "dram-drc0", "sdram",
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0x04, BIT(12), 0);
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static SUNXI_CCU_GATE(dram_drc1_clk, "dram-drc1", "sdram",
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0x04, BIT(13), 0);
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static SUNXI_CCU_GATE(bus_fe0_clk, "bus-fe0", "bus-de",
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0x08, BIT(0), 0);
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static SUNXI_CCU_GATE(bus_fe1_clk, "bus-fe1", "bus-de",
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0x08, BIT(1), 0);
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static SUNXI_CCU_GATE(bus_fe2_clk, "bus-fe2", "bus-de",
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0x08, BIT(2), 0);
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static SUNXI_CCU_GATE(bus_deu0_clk, "bus-deu0", "bus-de",
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0x08, BIT(4), 0);
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static SUNXI_CCU_GATE(bus_deu1_clk, "bus-deu1", "bus-de",
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0x08, BIT(5), 0);
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static SUNXI_CCU_GATE(bus_be0_clk, "bus-be0", "bus-de",
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0x08, BIT(8), 0);
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static SUNXI_CCU_GATE(bus_be1_clk, "bus-be1", "bus-de",
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0x08, BIT(9), 0);
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static SUNXI_CCU_GATE(bus_be2_clk, "bus-be2", "bus-de",
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0x08, BIT(10), 0);
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static SUNXI_CCU_GATE(bus_drc0_clk, "bus-drc0", "bus-de",
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0x08, BIT(12), 0);
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static SUNXI_CCU_GATE(bus_drc1_clk, "bus-drc1", "bus-de",
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0x08, BIT(13), 0);
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static SUNXI_CCU_M(fe0_div_clk, "fe0-div", "de", 0x20, 0, 4, 0);
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static SUNXI_CCU_M(fe1_div_clk, "fe1-div", "de", 0x20, 4, 4, 0);
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static SUNXI_CCU_M(fe2_div_clk, "fe2-div", "de", 0x20, 8, 4, 0);
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static SUNXI_CCU_M(be0_div_clk, "be0-div", "de", 0x20, 16, 4, 0);
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static SUNXI_CCU_M(be1_div_clk, "be1-div", "de", 0x20, 20, 4, 0);
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static SUNXI_CCU_M(be2_div_clk, "be2-div", "de", 0x20, 24, 4, 0);
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static struct ccu_common *sun9i_a80_de_clks[] = {
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&fe0_clk.common,
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&fe1_clk.common,
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&fe2_clk.common,
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&iep_deu0_clk.common,
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&iep_deu1_clk.common,
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&be0_clk.common,
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&be1_clk.common,
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&be2_clk.common,
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&iep_drc0_clk.common,
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&iep_drc1_clk.common,
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&merge_clk.common,
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&dram_fe0_clk.common,
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&dram_fe1_clk.common,
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&dram_fe2_clk.common,
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&dram_deu0_clk.common,
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&dram_deu1_clk.common,
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&dram_be0_clk.common,
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&dram_be1_clk.common,
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&dram_be2_clk.common,
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&dram_drc0_clk.common,
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&dram_drc1_clk.common,
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&bus_fe0_clk.common,
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&bus_fe1_clk.common,
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&bus_fe2_clk.common,
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&bus_deu0_clk.common,
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&bus_deu1_clk.common,
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&bus_be0_clk.common,
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&bus_be1_clk.common,
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&bus_be2_clk.common,
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&bus_drc0_clk.common,
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&bus_drc1_clk.common,
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&fe0_div_clk.common,
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&fe1_div_clk.common,
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&fe2_div_clk.common,
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&be0_div_clk.common,
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&be1_div_clk.common,
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&be2_div_clk.common,
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};
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static struct clk_hw_onecell_data sun9i_a80_de_hw_clks = {
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.hws = {
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[CLK_FE0] = &fe0_clk.common.hw,
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[CLK_FE1] = &fe1_clk.common.hw,
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[CLK_FE2] = &fe2_clk.common.hw,
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[CLK_IEP_DEU0] = &iep_deu0_clk.common.hw,
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[CLK_IEP_DEU1] = &iep_deu1_clk.common.hw,
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[CLK_BE0] = &be0_clk.common.hw,
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[CLK_BE1] = &be1_clk.common.hw,
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[CLK_BE2] = &be2_clk.common.hw,
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[CLK_IEP_DRC0] = &iep_drc0_clk.common.hw,
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[CLK_IEP_DRC1] = &iep_drc1_clk.common.hw,
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[CLK_MERGE] = &merge_clk.common.hw,
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[CLK_DRAM_FE0] = &dram_fe0_clk.common.hw,
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[CLK_DRAM_FE1] = &dram_fe1_clk.common.hw,
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[CLK_DRAM_FE2] = &dram_fe2_clk.common.hw,
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[CLK_DRAM_DEU0] = &dram_deu0_clk.common.hw,
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[CLK_DRAM_DEU1] = &dram_deu1_clk.common.hw,
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[CLK_DRAM_BE0] = &dram_be0_clk.common.hw,
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[CLK_DRAM_BE1] = &dram_be1_clk.common.hw,
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[CLK_DRAM_BE2] = &dram_be2_clk.common.hw,
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[CLK_DRAM_DRC0] = &dram_drc0_clk.common.hw,
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[CLK_DRAM_DRC1] = &dram_drc1_clk.common.hw,
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[CLK_BUS_FE0] = &bus_fe0_clk.common.hw,
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[CLK_BUS_FE1] = &bus_fe1_clk.common.hw,
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[CLK_BUS_FE2] = &bus_fe2_clk.common.hw,
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[CLK_BUS_DEU0] = &bus_deu0_clk.common.hw,
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[CLK_BUS_DEU1] = &bus_deu1_clk.common.hw,
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[CLK_BUS_BE0] = &bus_be0_clk.common.hw,
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[CLK_BUS_BE1] = &bus_be1_clk.common.hw,
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[CLK_BUS_BE2] = &bus_be2_clk.common.hw,
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[CLK_BUS_DRC0] = &bus_drc0_clk.common.hw,
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[CLK_BUS_DRC1] = &bus_drc1_clk.common.hw,
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[CLK_FE0_DIV] = &fe0_div_clk.common.hw,
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[CLK_FE1_DIV] = &fe1_div_clk.common.hw,
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[CLK_FE2_DIV] = &fe2_div_clk.common.hw,
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[CLK_BE0_DIV] = &be0_div_clk.common.hw,
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[CLK_BE1_DIV] = &be1_div_clk.common.hw,
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[CLK_BE2_DIV] = &be2_div_clk.common.hw,
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},
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.num = CLK_NUMBER,
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};
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static struct ccu_reset_map sun9i_a80_de_resets[] = {
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[RST_FE0] = { 0x0c, BIT(0) },
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[RST_FE1] = { 0x0c, BIT(1) },
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[RST_FE2] = { 0x0c, BIT(2) },
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[RST_DEU0] = { 0x0c, BIT(4) },
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[RST_DEU1] = { 0x0c, BIT(5) },
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[RST_BE0] = { 0x0c, BIT(8) },
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[RST_BE1] = { 0x0c, BIT(9) },
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[RST_BE2] = { 0x0c, BIT(10) },
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[RST_DRC0] = { 0x0c, BIT(12) },
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[RST_DRC1] = { 0x0c, BIT(13) },
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[RST_MERGE] = { 0x0c, BIT(20) },
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};
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static const struct sunxi_ccu_desc sun9i_a80_de_clk_desc = {
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.ccu_clks = sun9i_a80_de_clks,
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.num_ccu_clks = ARRAY_SIZE(sun9i_a80_de_clks),
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.hw_clks = &sun9i_a80_de_hw_clks,
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.resets = sun9i_a80_de_resets,
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.num_resets = ARRAY_SIZE(sun9i_a80_de_resets),
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};
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static int sun9i_a80_de_clk_probe(struct platform_device *pdev)
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{
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struct resource *res;
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struct clk *bus_clk;
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struct reset_control *rstc;
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void __iomem *reg;
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int ret;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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reg = devm_ioremap_resource(&pdev->dev, res);
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if (IS_ERR(reg))
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return PTR_ERR(reg);
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bus_clk = devm_clk_get(&pdev->dev, "bus");
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if (IS_ERR(bus_clk)) {
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ret = PTR_ERR(bus_clk);
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if (ret != -EPROBE_DEFER)
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dev_err(&pdev->dev, "Couldn't get bus clk: %d\n", ret);
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return ret;
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}
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rstc = devm_reset_control_get_exclusive(&pdev->dev, NULL);
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if (IS_ERR(rstc)) {
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ret = PTR_ERR(rstc);
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if (ret != -EPROBE_DEFER)
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dev_err(&pdev->dev,
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"Couldn't get reset control: %d\n", ret);
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return ret;
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}
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/* The bus clock needs to be enabled for us to access the registers */
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ret = clk_prepare_enable(bus_clk);
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if (ret) {
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dev_err(&pdev->dev, "Couldn't enable bus clk: %d\n", ret);
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return ret;
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}
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/* The reset control needs to be asserted for the controls to work */
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ret = reset_control_deassert(rstc);
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if (ret) {
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dev_err(&pdev->dev,
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"Couldn't deassert reset control: %d\n", ret);
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goto err_disable_clk;
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}
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ret = sunxi_ccu_probe(pdev->dev.of_node, reg,
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&sun9i_a80_de_clk_desc);
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if (ret)
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goto err_assert_reset;
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return 0;
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err_assert_reset:
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reset_control_assert(rstc);
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err_disable_clk:
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clk_disable_unprepare(bus_clk);
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return ret;
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}
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static const struct of_device_id sun9i_a80_de_clk_ids[] = {
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{ .compatible = "allwinner,sun9i-a80-de-clks" },
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{ }
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};
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static struct platform_driver sun9i_a80_de_clk_driver = {
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.probe = sun9i_a80_de_clk_probe,
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.driver = {
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.name = "sun9i-a80-de-clks",
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.of_match_table = sun9i_a80_de_clk_ids,
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},
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};
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builtin_platform_driver(sun9i_a80_de_clk_driver);
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