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7006ba24c2
Function imx_anatop_get_digprog() that reads register ANADIG_DIGPROG is called to identify silicon version. Users might query silicon version earlier than regmap subsystem is ready. For example, imx6q clock driver query revision in mx6q_clocks_init(), where regmap is not initialized yet. Change imx_anatop_get_digprog() to map anatop block and read ANADIG_DIGPROG in the native way, so that the function can work at very early stage. While at it, let's move imx_print_silicon_rev() back to imx6q_timer_init() to have the message show up a little earlier. Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/*
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* Copyright (C) 2013 Freescale Semiconductor, Inc.
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*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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#include <linux/err.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/mfd/syscon.h>
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#include <linux/regmap.h>
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#include "common.h"
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#define REG_SET 0x4
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#define REG_CLR 0x8
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#define ANADIG_REG_2P5 0x130
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#define ANADIG_REG_CORE 0x140
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#define ANADIG_ANA_MISC0 0x150
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#define ANADIG_USB1_CHRG_DETECT 0x1b0
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#define ANADIG_USB2_CHRG_DETECT 0x210
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#define ANADIG_DIGPROG 0x260
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#define BM_ANADIG_REG_2P5_ENABLE_WEAK_LINREG 0x40000
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#define BM_ANADIG_REG_CORE_FET_ODRIVE 0x20000000
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#define BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG 0x1000
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#define BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B 0x80000
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#define BM_ANADIG_USB_CHRG_DETECT_EN_B 0x100000
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static struct regmap *anatop;
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static void imx_anatop_enable_weak2p5(bool enable)
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{
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u32 reg, val;
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regmap_read(anatop, ANADIG_ANA_MISC0, &val);
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/* can only be enabled when stop_mode_config is clear. */
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reg = ANADIG_REG_2P5;
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reg += (enable && (val & BM_ANADIG_ANA_MISC0_STOP_MODE_CONFIG) == 0) ?
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REG_SET : REG_CLR;
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regmap_write(anatop, reg, BM_ANADIG_REG_2P5_ENABLE_WEAK_LINREG);
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}
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static void imx_anatop_enable_fet_odrive(bool enable)
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{
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regmap_write(anatop, ANADIG_REG_CORE + (enable ? REG_SET : REG_CLR),
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BM_ANADIG_REG_CORE_FET_ODRIVE);
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}
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void imx_anatop_pre_suspend(void)
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{
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imx_anatop_enable_weak2p5(true);
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imx_anatop_enable_fet_odrive(true);
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}
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void imx_anatop_post_resume(void)
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{
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imx_anatop_enable_fet_odrive(false);
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imx_anatop_enable_weak2p5(false);
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}
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void imx_anatop_usb_chrg_detect_disable(void)
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{
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regmap_write(anatop, ANADIG_USB1_CHRG_DETECT,
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BM_ANADIG_USB_CHRG_DETECT_EN_B
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| BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B);
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regmap_write(anatop, ANADIG_USB2_CHRG_DETECT,
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BM_ANADIG_USB_CHRG_DETECT_EN_B |
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BM_ANADIG_USB_CHRG_DETECT_CHK_CHRG_B);
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}
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u32 imx_anatop_get_digprog(void)
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{
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struct device_node *np;
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void __iomem *anatop_base;
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static u32 digprog;
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if (digprog)
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return digprog;
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np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-anatop");
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anatop_base = of_iomap(np, 0);
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WARN_ON(!anatop_base);
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digprog = readl_relaxed(anatop_base + ANADIG_DIGPROG);
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return digprog;
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}
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void __init imx_anatop_init(void)
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{
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anatop = syscon_regmap_lookup_by_compatible("fsl,imx6q-anatop");
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if (IS_ERR(anatop)) {
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pr_err("%s: failed to find imx6q-anatop regmap!\n", __func__);
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return;
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}
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}
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