Driver changes for ti-sysc for v5.4
Few changes to prepare for using a reset driver for PRM rstctrl mostly to deal with the clocks for reset. Then few minor clean-up patches and SPDX license identifier changes, and add a MAINTAINERs file entry. -----BEGIN PGP SIGNATURE----- iQJFBAABCAAvFiEEkgNvrZJU/QSQYIcQG9Q+yVyrpXMFAl1gZLgRHHRvbnlAYXRv bWlkZS5jb20ACgkQG9Q+yVyrpXNj5A/9F56FliHXmFRCsVw1vja5bgWagmOVnptx Xa0K29GanTx/cuTaUi5Cp+EPJSDYV2REp2J8jK9jfycEEm9ww3MovFCXJIYeUha3 URMsyd9PctoQyfYdgqfTFs/4HE6NUjCFRjegZWN4K+A0vCx6x5xli7565QTrk0iL /Eok6oCA3tZkG3cBHn7ZNYahf0NNTlKhYe2Mq2TsJTgROymQ5I9SaCHPSIgdWuH3 v0ysCyQnCNc9QLRLLdy2qnk1k5T/Mf04CMlUs8OIClm1d9cl0Wox83sQemaC5oLZ lpLBQYyuojob4rK2T2u4c6xNPrrDKltJufB0SyDuYBj30rCCPE/I3GwWZ9tjxcC0 OHq8r+PTdGASyD0H5RfXkXRQARUDuQqt8DQR6lwSnhcCz8pUooDrhGY4+44ynbwg /tBfKrEr1PcFMnN28Htz+djSqzTB7GNa4XINV87SNmnKuEFQ/nE/CPW7/McVK7Dx WsRPC/ial+LhUio8dNNML9Ul2+xw46tTxiO0wvMI6nI6NgmDbQ1zOmBMFzN6ze8y naAJSCA1kP9zeYZ8y/YWio8TTRbdHZznX8nqNXQ6t/UGBMrxaWeHiOulKmz1YlwR cBHduWwgF6t/qB7qrxwqNddUKcRRIfJA//h0QwieQLdC5EZeq0cUbn4yHMchnCIx DuOc9DS0NKk= =RAgR -----END PGP SIGNATURE----- Merge tag 'omap-for-v5.4/ti-sysc-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into arm/late Driver changes for ti-sysc for v5.4 Few changes to prepare for using a reset driver for PRM rstctrl mostly to deal with the clocks for reset. Then few minor clean-up patches and SPDX license identifier changes, and add a MAINTAINERs file entry. * tag 'omap-for-v5.4/ti-sysc-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: bus: ti-sysc: remove set but not used variable 'quirks' bus: ti-sysc: allow reset sharing across devices bus: ti-sysc: rework the reset handling bus: ti-sysc: re-order the clkdm control around reset handling bus: ti-sysc: Add missing kerneldoc comments bus: ti-sysc: Switch to SPDX license identifier dt-bindings: ti-sysc: Add SPDX license identifier MAINTAINERS: Add ti-sysc files under the OMAP2+ entry Link: https://lore.kernel.org/r/pull-1566599057-142651@atomide.com Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann
commit
bf3176b350
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@ -11786,6 +11786,7 @@ S: Maintained
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F: arch/arm/mach-omap2/
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F: arch/arm/plat-omap/
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F: arch/arm/configs/omap2plus_defconfig
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F: drivers/bus/ti-sysc.c
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F: drivers/i2c/busses/i2c-omap.c
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F: drivers/irqchip/irq-omap-intc.c
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F: drivers/mfd/*omap*.c
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@ -11806,6 +11807,7 @@ F: drivers/regulator/tps65910-regulator.c
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F: drivers/regulator/twl-regulator.c
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F: drivers/regulator/twl6030-regulator.c
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F: include/linux/platform_data/i2c-omap.h
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F: include/linux/platform_data/ti-sysc.h
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ONION OMEGA2+ BOARD
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M: Harvey Hunt <harveyhuntnexus@gmail.com>
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@ -1,14 +1,6 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* ti-sysc.c - Texas Instruments sysc interconnect target driver
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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 version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any
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* kind, whether express or implied; without even the implied warranty
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* of 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/io.h>
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@ -62,15 +54,22 @@ static const char * const clock_names[SYSC_MAX_CLOCKS] = {
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* @module_size: size of the interconnect target module
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* @module_va: virtual address of the interconnect target module
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* @offsets: register offsets from module base
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* @mdata: ti-sysc to hwmod translation data for a module
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* @clocks: clocks used by the interconnect target module
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* @clock_roles: clock role names for the found clocks
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* @nr_clocks: number of clocks used by the interconnect target module
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* @rsts: resets used by the interconnect target module
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* @legacy_mode: configured for legacy mode if set
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* @cap: interconnect target module capabilities
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* @cfg: interconnect target module configuration
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* @cookie: data used by legacy platform callbacks
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* @name: name if available
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* @revision: interconnect target module revision
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* @enabled: sysc runtime enabled status
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* @needs_resume: runtime resume needed on resume from suspend
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* @child_needs_resume: runtime resume needed for child on resume from suspend
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* @disable_on_idle: status flag used for disabling modules with resets
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* @idle_work: work structure used to perform delayed idle on a module
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* @clk_enable_quirk: module specific clock enable quirk
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* @clk_disable_quirk: module specific clock disable quirk
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* @reset_done_quirk: module specific reset done quirk
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@ -95,7 +94,6 @@ struct sysc {
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unsigned int enabled:1;
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unsigned int needs_resume:1;
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unsigned int child_needs_resume:1;
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unsigned int disable_on_idle:1;
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struct delayed_work idle_work;
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void (*clk_enable_quirk)(struct sysc *sysc);
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void (*clk_disable_quirk)(struct sysc *sysc);
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@ -503,7 +501,7 @@ static void sysc_clkdm_allow_idle(struct sysc *ddata)
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static int sysc_init_resets(struct sysc *ddata)
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{
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ddata->rsts =
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devm_reset_control_get_optional(ddata->dev, "rstctrl");
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devm_reset_control_get_optional_shared(ddata->dev, "rstctrl");
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if (IS_ERR(ddata->rsts))
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return PTR_ERR(ddata->rsts);
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@ -1031,7 +1029,6 @@ static int __maybe_unused sysc_runtime_suspend_legacy(struct device *dev,
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dev_err(dev, "%s: could not idle: %i\n",
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__func__, error);
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if (ddata->disable_on_idle)
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reset_control_assert(ddata->rsts);
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return 0;
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@ -1043,7 +1040,6 @@ static int __maybe_unused sysc_runtime_resume_legacy(struct device *dev,
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struct ti_sysc_platform_data *pdata;
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int error;
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if (ddata->disable_on_idle)
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reset_control_deassert(ddata->rsts);
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pdata = dev_get_platdata(ddata->dev);
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@ -1091,11 +1087,10 @@ static int __maybe_unused sysc_runtime_suspend(struct device *dev)
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ddata->enabled = false;
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err_allow_idle:
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sysc_clkdm_allow_idle(ddata);
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if (ddata->disable_on_idle)
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reset_control_assert(ddata->rsts);
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sysc_clkdm_allow_idle(ddata);
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return error;
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}
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@ -1109,11 +1104,11 @@ static int __maybe_unused sysc_runtime_resume(struct device *dev)
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if (ddata->enabled)
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return 0;
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if (ddata->disable_on_idle)
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reset_control_deassert(ddata->rsts);
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sysc_clkdm_deny_idle(ddata);
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reset_control_deassert(ddata->rsts);
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if (sysc_opt_clks_needed(ddata)) {
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error = sysc_enable_opt_clocks(ddata);
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if (error)
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@ -1532,7 +1527,7 @@ static int sysc_legacy_init(struct sysc *ddata)
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*/
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static int sysc_rstctrl_reset_deassert(struct sysc *ddata, bool reset)
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{
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int error, val;
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int error;
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if (!ddata->rsts)
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return 0;
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@ -1543,14 +1538,9 @@ static int sysc_rstctrl_reset_deassert(struct sysc *ddata, bool reset)
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return error;
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}
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error = reset_control_deassert(ddata->rsts);
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if (error == -EEXIST)
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reset_control_deassert(ddata->rsts);
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return 0;
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error = readx_poll_timeout(reset_control_status, ddata->rsts, val,
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val == 0, 100, MAX_MODULE_SOFTRESET_WAIT);
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return error;
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}
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/*
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@ -1559,12 +1549,11 @@ static int sysc_rstctrl_reset_deassert(struct sysc *ddata, bool reset)
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*/
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static int sysc_reset(struct sysc *ddata)
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{
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int sysc_offset, syss_offset, sysc_val, rstval, quirks, error = 0;
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int sysc_offset, syss_offset, sysc_val, rstval, error = 0;
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u32 sysc_mask, syss_done;
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sysc_offset = ddata->offsets[SYSC_SYSCONFIG];
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syss_offset = ddata->offsets[SYSC_SYSSTATUS];
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quirks = ddata->cfg.quirks;
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if (ddata->legacy_mode || sysc_offset < 0 ||
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ddata->cap->regbits->srst_shift < 0 ||
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@ -2427,6 +2416,10 @@ static int sysc_probe(struct platform_device *pdev)
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goto unprepare;
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}
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/* Balance reset counts */
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if (ddata->rsts)
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reset_control_assert(ddata->rsts);
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sysc_show_registers(ddata);
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ddata->dev->type = &sysc_device_type;
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@ -2446,9 +2439,6 @@ static int sysc_probe(struct platform_device *pdev)
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pm_runtime_put(&pdev->dev);
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}
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if (!of_get_available_child_count(ddata->dev->of_node))
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ddata->disable_on_idle = true;
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return 0;
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err:
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@ -1,3 +1,4 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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/* TI sysc interconnect target module defines */
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/* Generic sysc found on omap2 and later, also known as type1 */
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@ -1,3 +1,5 @@
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __TI_SYSC_DATA_H__
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#define __TI_SYSC_DATA_H__
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@ -70,7 +72,7 @@ struct sysc_regbits {
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/**
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* struct sysc_capabilities - capabilities for an interconnect target module
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*
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* @type: sysc type identifier for the module
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* @sysc_mask: bitmask of supported SYSCONFIG register bits
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* @regbits: bitmask of SYSCONFIG register bits
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* @mod_quirks: bitmask of module specific quirks
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@ -85,8 +87,9 @@ struct sysc_capabilities {
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/**
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* struct sysc_config - configuration for an interconnect target module
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* @sysc_val: configured value for sysc register
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* @syss_mask: configured mask value for SYSSTATUS register
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* @midlemodes: bitmask of supported master idle modes
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* @sidlemodes: bitmask of supported master idle modes
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* @sidlemodes: bitmask of supported slave idle modes
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* @srst_udelay: optional delay needed after OCP soft reset
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* @quirks: bitmask of enabled quirks
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*/
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