From patchwork Fri Nov 1 06:27:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kiran Gunda X-Patchwork-Id: 11222399 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 57725139A for ; Fri, 1 Nov 2019 06:28:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 21A3920862 for ; Fri, 1 Nov 2019 06:28:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="Y2hcxqs8"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="HmLf5JaG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730034AbfKAG2R (ORCPT ); Fri, 1 Nov 2019 02:28:17 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:46356 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727383AbfKAG2R (ORCPT ); Fri, 1 Nov 2019 02:28:17 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id A25BF60EB7; Fri, 1 Nov 2019 06:28:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1572589695; bh=VJaggXKkAdhdvmaFJtZWH3RtC9vQplMy8u1lGYxGYTg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Y2hcxqs8MyKWxub3aHRhn7jeNU4pymCBuuE/Zp0+kf0bsvZ/9dMvwfSrudwXZOgi+ AJuSjqHwZtvj9gF03zXOsJwSKCn9AVaFwVhAzmn7Wo6mCzL7UKR3/ZfJH5SqO4dJSb 9L46Awqqik9zaMEzjNGptGQLMv8iBfRHrqAqkvFI= X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.7 required=2.0 tests=ALL_TRUSTED,BAYES_00, DKIM_INVALID,DKIM_SIGNED,SPF_NONE autolearn=no autolearn_force=no version=3.4.0 Received: from kgunda-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: kgunda@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 1400360EB7; Fri, 1 Nov 2019 06:28:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1572589691; bh=VJaggXKkAdhdvmaFJtZWH3RtC9vQplMy8u1lGYxGYTg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HmLf5JaGY6YIvpYlkJBtpMfvi6jnTYUra3AgS9InadVmwFMZrTWNjiJp5ZHxlVTpa cquKypffS85HG0OEmQiOA2HIOOElQsZ0ip9qyCcy+Y0lluug6gjYEjyjEJgKBm7UKb gFfWAanxPKgEcTp8ivWNHae7SuIwacDj8GSBkbEM= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 1400360EB7 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=kgunda@codeaurora.org From: Kiran Gunda To: bjorn.andersson@linaro.org, jingoohan1@gmail.com, lee.jones@linaro.org, b.zolnierkie@samsung.com, dri-devel@lists.freedesktop.org, daniel.thompson@linaro.org, jacek.anaszewski@gmail.com, pavel@ucw.cz, robh+dt@kernel.org, mark.rutland@arm.com, linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Andy Gross , linux-arm-msm@vger.kernel.org, linux-fbdev@vger.kernel.org Cc: Kiran Gunda Subject: [PATCH V10 6/8] backlight: qcom-wled: Add support for WLED4 peripheral. Date: Fri, 1 Nov 2019 11:57:02 +0530 Message-Id: <1572589624-6095-7-git-send-email-kgunda@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1572589624-6095-1-git-send-email-kgunda@codeaurora.org> References: <1572589624-6095-1-git-send-email-kgunda@codeaurora.org> Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org WLED4 peripheral is present on some PMICs like pmi8998 and pm660l. It has a different register map and configurations are also different. Add support for it. Signed-off-by: Kiran Gunda Reviewed-by: Bjorn Andersson Reviewed-by: Daniel Thompson --- drivers/video/backlight/qcom-wled.c | 255 +++++++++++++++++++++++++++++++++++- 1 file changed, 253 insertions(+), 2 deletions(-) diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c index 45eeda4..5386ca9 100644 --- a/drivers/video/backlight/qcom-wled.c +++ b/drivers/video/backlight/qcom-wled.c @@ -17,7 +17,7 @@ #define WLED3_SINK_REG_BRIGHT_MAX 0xFFF -/* WLED3 control registers */ +/* WLED3/WLED4 control registers */ #define WLED3_CTRL_REG_MOD_EN 0x46 #define WLED3_CTRL_REG_MOD_EN_MASK BIT(7) #define WLED3_CTRL_REG_MOD_EN_SHIFT 7 @@ -31,7 +31,7 @@ #define WLED3_CTRL_REG_ILIMIT 0x4e #define WLED3_CTRL_REG_ILIMIT_MASK GENMASK(2, 0) -/* WLED3 sink registers */ +/* WLED3/WLED4 sink registers */ #define WLED3_SINK_REG_SYNC 0x47 #define WLED3_SINK_REG_SYNC_CLEAR 0x00 @@ -56,6 +56,28 @@ #define WLED3_SINK_REG_STR_CABC(n) (0x66 + (n * 0x10)) #define WLED3_SINK_REG_STR_CABC_MASK BIT(7) +/* WLED4 specific sink registers */ +#define WLED4_SINK_REG_CURR_SINK 0x46 +#define WLED4_SINK_REG_CURR_SINK_MASK GENMASK(7, 4) +#define WLED4_SINK_REG_CURR_SINK_SHFT 4 + +/* WLED4 specific per-'string' registers below */ +#define WLED4_SINK_REG_STR_MOD_EN(n) (0x50 + (n * 0x10)) +#define WLED4_SINK_REG_STR_MOD_MASK BIT(7) + +#define WLED4_SINK_REG_STR_FULL_SCALE_CURR(n) (0x52 + (n * 0x10)) +#define WLED4_SINK_REG_STR_FULL_SCALE_CURR_MASK GENMASK(3, 0) + +#define WLED4_SINK_REG_STR_MOD_SRC(n) (0x53 + (n * 0x10)) +#define WLED4_SINK_REG_STR_MOD_SRC_MASK BIT(0) +#define WLED4_SINK_REG_STR_MOD_SRC_INT 0x00 +#define WLED4_SINK_REG_STR_MOD_SRC_EXT 0x01 + +#define WLED4_SINK_REG_STR_CABC(n) (0x56 + (n * 0x10)) +#define WLED4_SINK_REG_STR_CABC_MASK BIT(7) + +#define WLED4_SINK_REG_BRIGHT(n) (0x57 + (n * 0x10)) + struct wled_var_cfg { const u32 *values; u32 (*fn)(u32); @@ -90,6 +112,7 @@ struct wled { struct device *dev; struct regmap *regmap; u16 ctrl_addr; + u16 sink_addr; u16 max_string_count; u32 brightness; u32 max_brightness; @@ -116,6 +139,29 @@ static int wled3_set_brightness(struct wled *wled, u16 brightness) return 0; } +static int wled4_set_brightness(struct wled *wled, u16 brightness) +{ + int rc, i; + u16 low_limit = wled->max_brightness * 4 / 1000; + u8 v[2]; + + /* WLED4's lower limit of operation is 0.4% */ + if (brightness > 0 && brightness < low_limit) + brightness = low_limit; + + v[0] = brightness & 0xff; + v[1] = (brightness >> 8) & 0xf; + + for (i = 0; i < wled->cfg.num_strings; ++i) { + rc = regmap_bulk_write(wled->regmap, wled->sink_addr + + WLED4_SINK_REG_BRIGHT(i), v, 2); + if (rc < 0) + return rc; + } + + return 0; +} + static int wled_module_enable(struct wled *wled, int val) { int rc; @@ -267,6 +313,120 @@ static int wled3_setup(struct wled *wled) .enabled_strings = {0, 1, 2, 3}, }; +static int wled4_setup(struct wled *wled) +{ + int rc, temp, i, j; + u16 addr; + u8 sink_en = 0; + u32 sink_cfg = 0; + + rc = regmap_update_bits(wled->regmap, + wled->ctrl_addr + WLED3_CTRL_REG_OVP, + WLED3_CTRL_REG_OVP_MASK, wled->cfg.ovp); + if (rc < 0) + return rc; + + rc = regmap_update_bits(wled->regmap, + wled->ctrl_addr + WLED3_CTRL_REG_ILIMIT, + WLED3_CTRL_REG_ILIMIT_MASK, + wled->cfg.boost_i_limit); + if (rc < 0) + return rc; + + rc = regmap_update_bits(wled->regmap, + wled->ctrl_addr + WLED3_CTRL_REG_FREQ, + WLED3_CTRL_REG_FREQ_MASK, + wled->cfg.switch_freq); + if (rc < 0) + return rc; + + rc = regmap_read(wled->regmap, wled->sink_addr + + WLED4_SINK_REG_CURR_SINK, &sink_cfg); + if (rc < 0) + return rc; + + for (i = 0; i < wled->cfg.num_strings; i++) { + j = wled->cfg.enabled_strings[i]; + temp = j + WLED4_SINK_REG_CURR_SINK_SHFT; + sink_en |= 1 << temp; + } + + if (sink_cfg == sink_en) + return 0; + + rc = regmap_update_bits(wled->regmap, + wled->sink_addr + WLED4_SINK_REG_CURR_SINK, + WLED4_SINK_REG_CURR_SINK_MASK, 0); + if (rc < 0) + return rc; + + rc = regmap_update_bits(wled->regmap, wled->ctrl_addr + + WLED3_CTRL_REG_MOD_EN, + WLED3_CTRL_REG_MOD_EN_MASK, 0); + if (rc < 0) + return rc; + + /* Per sink/string configuration */ + for (i = 0; i < wled->cfg.num_strings; i++) { + j = wled->cfg.enabled_strings[i]; + + addr = wled->sink_addr + + WLED4_SINK_REG_STR_MOD_EN(j); + rc = regmap_update_bits(wled->regmap, addr, + WLED4_SINK_REG_STR_MOD_MASK, + WLED4_SINK_REG_STR_MOD_MASK); + if (rc < 0) + return rc; + + addr = wled->sink_addr + + WLED4_SINK_REG_STR_FULL_SCALE_CURR(j); + rc = regmap_update_bits(wled->regmap, addr, + WLED4_SINK_REG_STR_FULL_SCALE_CURR_MASK, + wled->cfg.string_i_limit); + if (rc < 0) + return rc; + + addr = wled->sink_addr + + WLED4_SINK_REG_STR_CABC(j); + rc = regmap_update_bits(wled->regmap, addr, + WLED4_SINK_REG_STR_CABC_MASK, + wled->cfg.cabc ? + WLED4_SINK_REG_STR_CABC_MASK : 0); + if (rc < 0) + return rc; + } + + rc = regmap_update_bits(wled->regmap, wled->ctrl_addr + + WLED3_CTRL_REG_MOD_EN, + WLED3_CTRL_REG_MOD_EN_MASK, + WLED3_CTRL_REG_MOD_EN_MASK); + if (rc < 0) + return rc; + + rc = regmap_update_bits(wled->regmap, + wled->sink_addr + WLED4_SINK_REG_CURR_SINK, + WLED4_SINK_REG_CURR_SINK_MASK, sink_en); + if (rc < 0) + return rc; + + rc = wled_sync_toggle(wled); + if (rc < 0) { + dev_err(wled->dev, "Failed to toggle sync reg rc:%d\n", rc); + return rc; + } + + return 0; +} + +static const struct wled_config wled4_config_defaults = { + .boost_i_limit = 4, + .string_i_limit = 10, + .ovp = 1, + .num_strings = 4, + .switch_freq = 11, + .cabc = false, +}; + static const u32 wled3_boost_i_limit_values[] = { 105, 385, 525, 805, 980, 1260, 1400, 1680, }; @@ -276,6 +436,15 @@ static int wled3_setup(struct wled *wled) .size = ARRAY_SIZE(wled3_boost_i_limit_values), }; +static const u32 wled4_boost_i_limit_values[] = { + 105, 280, 450, 620, 970, 1150, 1300, 1500, +}; + +static const struct wled_var_cfg wled4_boost_i_limit_cfg = { + .values = wled4_boost_i_limit_values, + .size = ARRAY_SIZE(wled4_boost_i_limit_values), +}; + static const u32 wled3_ovp_values[] = { 35, 32, 29, 27, }; @@ -285,6 +454,15 @@ static int wled3_setup(struct wled *wled) .size = ARRAY_SIZE(wled3_ovp_values), }; +static const u32 wled4_ovp_values[] = { + 31100, 29600, 19600, 18100, +}; + +static const struct wled_var_cfg wled4_ovp_cfg = { + .values = wled4_ovp_values, + .size = ARRAY_SIZE(wled4_ovp_values), +}; + static u32 wled3_num_strings_values_fn(u32 idx) { return idx + 1; @@ -295,6 +473,11 @@ static u32 wled3_num_strings_values_fn(u32 idx) .size = 3, }; +static const struct wled_var_cfg wled4_num_strings_cfg = { + .fn = wled3_num_strings_values_fn, + .size = 4, +}; + static u32 wled3_switch_freq_values_fn(u32 idx) { return 19200 / (2 * (1 + idx)); @@ -309,10 +492,24 @@ static u32 wled3_switch_freq_values_fn(u32 idx) .size = 26, }; +static const u32 wled4_string_i_limit_values[] = { + 0, 2500, 5000, 7500, 10000, 12500, 15000, 17500, 20000, + 22500, 25000, 27500, 30000, +}; + +static const struct wled_var_cfg wled4_string_i_limit_cfg = { + .values = wled4_string_i_limit_values, + .size = ARRAY_SIZE(wled4_string_i_limit_values), +}; + static const struct wled_var_cfg wled3_string_cfg = { .size = 8, }; +static const struct wled_var_cfg wled4_string_cfg = { + .size = 16, +}; + static u32 wled_values(const struct wled_var_cfg *cfg, u32 idx) { if (idx >= cfg->size) @@ -361,6 +558,34 @@ static int wled_configure(struct wled *wled, int version) }, }; + const struct wled_u32_opts wled4_opts[] = { + { + .name = "qcom,current-boost-limit", + .val_ptr = &cfg->boost_i_limit, + .cfg = &wled4_boost_i_limit_cfg, + }, + { + .name = "qcom,current-limit-microamp", + .val_ptr = &cfg->string_i_limit, + .cfg = &wled4_string_i_limit_cfg, + }, + { + .name = "qcom,ovp-millivolt", + .val_ptr = &cfg->ovp, + .cfg = &wled4_ovp_cfg, + }, + { + .name = "qcom,switching-freq", + .val_ptr = &cfg->switch_freq, + .cfg = &wled3_switch_freq_cfg, + }, + { + .name = "qcom,num-strings", + .val_ptr = &cfg->num_strings, + .cfg = &wled4_num_strings_cfg, + }, + }; + const struct wled_bool_opts bool_opts[] = { { "qcom,cs-out", &cfg->cs_out_en, }, { "qcom,ext-gen", &cfg->ext_gen, }, @@ -385,6 +610,22 @@ static int wled_configure(struct wled *wled, int version) *cfg = wled3_config_defaults; wled->wled_set_brightness = wled3_set_brightness; wled->max_string_count = 3; + wled->sink_addr = wled->ctrl_addr; + break; + + case 4: + u32_opts = wled4_opts; + size = ARRAY_SIZE(wled4_opts); + *cfg = wled4_config_defaults; + wled->wled_set_brightness = wled4_set_brightness; + wled->max_string_count = 4; + + prop_addr = of_get_address(dev->of_node, 1, NULL, NULL); + if (!prop_addr) { + dev_err(wled->dev, "invalid IO resources\n"); + return -EINVAL; + } + wled->sink_addr = be32_to_cpu(*prop_addr); break; default: @@ -483,6 +724,14 @@ static int wled_probe(struct platform_device *pdev) } break; + case 4: + rc = wled4_setup(wled); + if (rc) { + dev_err(&pdev->dev, "wled4_setup failed\n"); + return rc; + } + break; + default: dev_err(wled->dev, "Invalid WLED version\n"); break; @@ -503,6 +752,8 @@ static int wled_probe(struct platform_device *pdev) static const struct of_device_id wled_match_table[] = { { .compatible = "qcom,pm8941-wled", .data = (void *)3 }, + { .compatible = "qcom,pmi8998-wled", .data = (void *)4 }, + { .compatible = "qcom,pm660l-wled", .data = (void *)4 }, {} }; MODULE_DEVICE_TABLE(of, wled_match_table);