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[86.31.179.135]) by smtp.gmail.com with ESMTPSA id s10sm4583941wrv.56.2019.03.18.12.40.57 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 18 Mar 2019 12:40:57 -0700 (PDT) From: Peter Griffin To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, airlied@linux.ie, daniel@ffwll.ch, robh+dt@kernel.org, mark.rutland@arm.com, p.zabel@pengutronix.de, xuwei5@hisilicon.com, mturquette@baylibre.com, sboyd@kernel.org Subject: [PATCH v1 4/6] reset: hi6220: Add support for AO reset controller Date: Mon, 18 Mar 2019 19:38:49 +0000 Message-Id: <1552937931-23050-5-git-send-email-peter.griffin@linaro.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1552937931-23050-1-git-send-email-peter.griffin@linaro.org> References: <1552937931-23050-1-git-send-email-peter.griffin@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190318_124100_530935_9764FAFB X-CRM114-Status: GOOD ( 14.30 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, john.stultz@linaro.org, linux-clk@vger.kernel.org, dri-devel@lists.freedesktop.org, yuq825@gmail.com MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This is required to bring Mali450 gpu out of reset. Signed-off-by: Peter Griffin --- drivers/reset/hisilicon/hi6220_reset.c | 51 +++++++++++++++++++++++++++++++++- 1 file changed, 50 insertions(+), 1 deletion(-) diff --git a/drivers/reset/hisilicon/hi6220_reset.c b/drivers/reset/hisilicon/hi6220_reset.c index d5e5229..0cd5f92 100644 --- a/drivers/reset/hisilicon/hi6220_reset.c +++ b/drivers/reset/hisilicon/hi6220_reset.c @@ -36,6 +36,7 @@ enum hi6220_reset_ctrl_type { PERIPHERAL, MEDIA, + AO, }; struct hi6220_reset_data { @@ -95,6 +96,47 @@ static const struct reset_control_ops hi6220_media_reset_ops = { .deassert = hi6220_media_deassert, }; +#define AO_SCTRL_SC_PW_CLKEN0 0x800 +#define AO_SCTRL_SC_PW_CLKDIS0 0x804 + +#define AO_SCTRL_SC_PW_RSTEN0 0x810 +#define AO_SCTRL_SC_PW_RSTDIS0 0x814 + +#define AO_SCTRL_SC_PW_ISOEN0 0x820 +#define AO_SCTRL_SC_PW_ISODIS0 0x824 +#define AO_MAX_INDEX 12 + +static int hi6220_ao_assert(struct reset_controller_dev *rc_dev, + unsigned long idx) +{ + struct hi6220_reset_data *data = to_reset_data(rc_dev); + struct regmap *regmap = data->regmap; + int ret; + + ret = regmap_write(regmap, AO_SCTRL_SC_PW_RSTEN0, BIT(idx)); + ret |= regmap_write(regmap, AO_SCTRL_SC_PW_ISOEN0, BIT(idx)); + ret |= regmap_write(regmap, AO_SCTRL_SC_PW_CLKDIS0, BIT(idx)); + return ret; +} + +static int hi6220_ao_deassert(struct reset_controller_dev *rc_dev, + unsigned long idx) +{ + struct hi6220_reset_data *data = to_reset_data(rc_dev); + struct regmap *regmap = data->regmap; + int ret; + + ret = regmap_write(regmap, AO_SCTRL_SC_PW_RSTDIS0, BIT(idx)); + ret |= regmap_write(regmap, AO_SCTRL_SC_PW_ISODIS0, BIT(idx)); + ret |= regmap_write(regmap, AO_SCTRL_SC_PW_CLKEN0, BIT(idx)); + return ret; +} + +static const struct reset_control_ops hi6220_ao_reset_ops = { + .assert = hi6220_ao_assert, + .deassert = hi6220_ao_deassert, +}; + static int hi6220_reset_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -120,9 +162,12 @@ static int hi6220_reset_probe(struct platform_device *pdev) if (type == MEDIA) { data->rc_dev.ops = &hi6220_media_reset_ops; data->rc_dev.nr_resets = MEDIA_MAX_INDEX; - } else { + } else if (type == PERIPHERAL) { data->rc_dev.ops = &hi6220_peripheral_reset_ops; data->rc_dev.nr_resets = PERIPH_MAX_INDEX; + } else { + data->rc_dev.ops = &hi6220_ao_reset_ops; + data->rc_dev.nr_resets = AO_MAX_INDEX; } return reset_controller_register(&data->rc_dev); @@ -137,6 +182,10 @@ static const struct of_device_id hi6220_reset_match[] = { .compatible = "hisilicon,hi6220-mediactrl", .data = (void *)MEDIA, }, + { + .compatible = "hisilicon,hi6220-aoctrl", + .data = (void *)AO, + }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, hi6220_reset_match);