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[176.150.251.154]) by smtp.gmail.com with ESMTPSA id l9sm33341617wmh.36.2019.07.22.00.24.40 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 22 Jul 2019 00:24:40 -0700 (PDT) Subject: Re: [PATCH 2/2] clk: meson: axg-audio: add g12a reset support To: Jerome Brunet References: <20190703122614.3579-1-jbrunet@baylibre.com> <20190703122614.3579-3-jbrunet@baylibre.com> From: Neil Armstrong Openpgp: preference=signencrypt Autocrypt: addr=narmstrong@baylibre.com; prefer-encrypt=mutual; keydata= mQENBE1ZBs8BCAD78xVLsXPwV/2qQx2FaO/7mhWL0Qodw8UcQJnkrWmgTFRobtTWxuRx8WWP GTjuhvbleoQ5Cxjr+v+1ARGCH46MxFP5DwauzPekwJUD5QKZlaw/bURTLmS2id5wWi3lqVH4 BVF2WzvGyyeV1o4RTCYDnZ9VLLylJ9bneEaIs/7cjCEbipGGFlfIML3sfqnIvMAxIMZrvcl9 qPV2k+KQ7q+aXavU5W+yLNn7QtXUB530Zlk/d2ETgzQ5FLYYnUDAaRl+8JUTjc0CNOTpCeik 80TZcE6f8M76Xa6yU8VcNko94Ck7iB4vj70q76P/J7kt98hklrr85/3NU3oti3nrIHmHABEB AAG0KE5laWwgQXJtc3Ryb25nIDxuYXJtc3Ryb25nQGJheWxpYnJlLmNvbT6JATsEEwEKACUC GyMGCwkIBwMCBhUIAgkKCwQWAgMBAh4BAheABQJXDO2CAhkBAAoJEBaat7Gkz/iubGIH/iyk RqvgB62oKOFlgOTYCMkYpm2aAOZZLf6VKHKc7DoVwuUkjHfIRXdslbrxi4pk5VKU6ZP9AKsN NtMZntB8WrBTtkAZfZbTF7850uwd3eU5cN/7N1Q6g0JQihE7w4GlIkEpQ8vwSg5W7hkx3yQ6 2YzrUZh/b7QThXbNZ7xOeSEms014QXazx8+txR7jrGF3dYxBsCkotO/8DNtZ1R+aUvRfpKg5 ZgABTC0LmAQnuUUf2PHcKFAHZo5KrdO+tyfL+LgTUXIXkK+tenkLsAJ0cagz1EZ5gntuheLD YJuzS4zN+1Asmb9kVKxhjSQOcIh6g2tw7vaYJgL/OzJtZi6JlIW5AQ0ETVkGzwEIALyKDN/O GURaHBVzwjgYq+ZtifvekdrSNl8TIDH8g1xicBYpQTbPn6bbSZbdvfeQPNCcD4/EhXZuhQXM coJsQQQnO4vwVULmPGgtGf8PVc7dxKOeta+qUh6+SRh3vIcAUFHDT3f/Zdspz+e2E0hPV2hi SvICLk11qO6cyJE13zeNFoeY3ggrKY+IzbFomIZY4yG6xI99NIPEVE9lNBXBKIlewIyVlkOa YvJWSV+p5gdJXOvScNN1epm5YHmf9aE2ZjnqZGoMMtsyw18YoX9BqMFInxqYQQ3j/HpVgTSv mo5ea5qQDDUaCsaTf8UeDcwYOtgI8iL4oHcsGtUXoUk33HEAEQEAAYkBHwQYAQIACQUCTVkG zwIbDAAKCRAWmrexpM/4rrXiB/sGbkQ6itMrAIfnM7IbRuiSZS1unlySUVYu3SD6YBYnNi3G 5EpbwfBNuT3H8//rVvtOFK4OD8cRYkxXRQmTvqa33eDIHu/zr1HMKErm+2SD6PO9umRef8V8 2o2oaCLvf4WeIssFjwB0b6a12opuRP7yo3E3gTCSKmbUuLv1CtxKQF+fUV1cVaTPMyT25Od+ RC1K+iOR0F54oUJvJeq7fUzbn/KdlhA8XPGzwGRy4zcsPWvwnXgfe5tk680fEKZVwOZKIEuJ C3v+/yZpQzDvGYJvbyix0lHnrCzq43WefRHI5XTTQbM0WUIBIcGmq38+OgUsMYu4NzLu7uZF Acmp6h8guQINBFYnf6QBEADQ+wBYa+X2n/xIQz/RUoGHf84Jm+yTqRT43t7sO48/cBW9vAn9 GNwnJ3HRJWKATW0ZXrCr40ES/JqM1fUTfiFDB3VMdWpEfwOAT1zXS+0rX8yljgsWR1UvqyEP 3xN0M/40Zk+rdmZKaZS8VQaXbveaiWMEmY7sBV3QvgOzB7UF2It1HwoCon5Y+PvyE3CguhBd 9iq5iEampkMIkbA3FFCpQFI5Ai3BywkLzbA3ZtnMXR8Qt9gFZtyXvFQrB+/6hDzEPnBGZOOx zkd/iIX59SxBuS38LMlhPPycbFNmtauOC0DNpXCv9ACgC9tFw3exER/xQgSpDVc4vrL2Cacr wmQp1k9E0W+9pk/l8S1jcHx03hgCxPtQLOIyEu9iIJb27TjcXNjiInd7Uea195NldIrndD+x 58/yU3X70qVY+eWbqzpdlwF1KRm6uV0ZOQhEhbi0FfKKgsYFgBIBchGqSOBsCbL35f9hK/JC 6LnGDtSHeJs+jd9/qJj4WqF3x8i0sncQ/gszSajdhnWrxraG3b7/9ldMLpKo/OoihfLaCxtv xYmtw8TGhlMaiOxjDrohmY1z7f3rf6njskoIXUO0nabun1nPAiV1dpjleg60s3OmVQeEpr3a K7gR1ljkemJzM9NUoRROPaT7nMlNYQL+IwuthJd6XQqwzp1jRTGG26J97wARAQABiQM+BBgB AgAJBQJWJ3+kAhsCAikJEBaat7Gkz/iuwV0gBBkBAgAGBQJWJ3+kAAoJEHfc29rIyEnRk6MQ AJDo0nxsadLpYB26FALZsWlN74rnFXth5dQVQ7SkipmyFWZhFL8fQ9OiIoxWhM6rSg9+C1w+ n45eByMg2b8H3mmQmyWztdI95OxSREKwbaXVapCcZnv52JRjlc3DoiiHqTZML5x1Z7lQ1T3F 8o9sKrbFO1WQw1+Nc91+MU0MGN0jtfZ0Tvn/ouEZrSXCE4K3oDGtj3AdC764yZVq6CPigCgs 6Ex80k6QlzCdVP3RKsnPO2xQXXPgyJPJlpD8bHHHW7OLfoR9DaBNympfcbQJeekQrTvyoASw EOTPKE6CVWrcQIztUp0WFTdRGgMK0cZB3Xfe6sOp24PQTHAKGtjTHNP/THomkH24Fum9K3iM /4Wh4V2eqGEgpdeSp5K+LdaNyNgaqzMOtt4HYk86LYLSHfFXywdlbGrY9+TqiJ+ZVW4trmui NIJCOku8SYansq34QzYM0x3UFRwff+45zNBEVzctSnremg1mVgrzOfXU8rt+4N1b2MxorPF8 619aCwVP7U16qNSBaqiAJr4e5SNEnoAq18+1Gp8QsFG0ARY8xp+qaKBByWES7lRi3QbqAKZf yOHS6gmYo9gBmuAhc65/VtHMJtxwjpUeN4Bcs9HUpDMDVHdfeRa73wM+wY5potfQ5zkSp0Jp bxnv/cRBH6+c43stTffprd//4Hgz+nJcCgZKtCYIAPkUxABC85ID2CidzbraErVACmRoizhT KR2OiqSLW2x4xdmSiFNcIWkWJB6Qdri0Fzs2dHe8etD1HYaht1ZhZ810s7QOL7JwypO8dscN KTEkyoTGn6cWj0CX+PeP4xp8AR8ot4d0BhtUY34UPzjE1/xyrQFAdnLd0PP4wXxdIUuRs0+n WLY9Aou/vC1LAdlaGsoTVzJ2gX4fkKQIWhX0WVk41BSFeDKQ3RQ2pnuzwedLO94Bf6X0G48O VsbXrP9BZ6snXyHfebPnno/te5XRqZTL9aJOytB/1iUna+1MAwBxGFPvqeEUUyT+gx1l3Acl ZaTUOEkgIor5losDrePdPgE= Organization: Baylibre Message-ID: <87b55e1e-7738-5fb7-405b-f1418d258dbd@baylibre.com> Date: Mon, 22 Jul 2019 09:24:39 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.7.2 MIME-Version: 1.0 In-Reply-To: <20190703122614.3579-3-jbrunet@baylibre.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190722_002442_571679_F87B589F X-CRM114-Status: GOOD ( 20.72 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Hilman , linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-amlogic@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org On 03/07/2019 14:26, Jerome Brunet wrote: > On the g12a, the register space dedicated to the audio clock also > provides some resets. Let the clock controller register a reset > provider as well for this SoC family. > > the axg SoC family does not appear to provide this feature. > > Signed-off-by: Jerome Brunet > --- > drivers/clk/meson/axg-audio.c | 107 +++++++++++++++++++++++++++++++++- > drivers/clk/meson/axg-audio.h | 1 + > 2 files changed, 106 insertions(+), 2 deletions(-) > > diff --git a/drivers/clk/meson/axg-audio.c b/drivers/clk/meson/axg-audio.c > index 8028ff6f6610..ce163bd03aad 100644 > --- a/drivers/clk/meson/axg-audio.c > +++ b/drivers/clk/meson/axg-audio.c > @@ -12,6 +12,7 @@ > #include > #include > #include > +#include > #include > > #include "axg-audio.h" > @@ -916,6 +917,84 @@ static int axg_register_clk_hw_inputs(struct device *dev, > return 0; > } > > +struct axg_audio_reset_data { > + struct reset_controller_dev rstc; > + struct regmap *map; > + unsigned int offset; > +}; > + > +static void axg_audio_reset_reg_and_bit(struct axg_audio_reset_data *rst, > + unsigned long id, > + unsigned int *reg, > + unsigned int *bit) > +{ > + unsigned int stride = regmap_get_reg_stride(rst->map); > + > + *reg = (id / (stride * BITS_PER_BYTE)) * stride; > + *reg += rst->offset; > + *bit = id % (stride * BITS_PER_BYTE); > +} > + > +static int axg_audio_reset_update(struct reset_controller_dev *rcdev, > + unsigned long id, bool assert) > +{ > + struct axg_audio_reset_data *rst = > + container_of(rcdev, struct axg_audio_reset_data, rstc); > + unsigned int offset, bit; > + > + axg_audio_reset_reg_and_bit(rst, id, &offset, &bit); > + > + regmap_update_bits(rst->map, offset, BIT(bit), > + assert ? BIT(bit) : 0); > + > + return 0; > +} > + > +static int axg_audio_reset_status(struct reset_controller_dev *rcdev, > + unsigned long id) > +{ > + struct axg_audio_reset_data *rst = > + container_of(rcdev, struct axg_audio_reset_data, rstc); > + unsigned int val, offset, bit; > + > + axg_audio_reset_reg_and_bit(rst, id, &offset, &bit); > + > + regmap_read(rst->map, offset, &val); > + > + return !!(val & BIT(bit)); > +} > + > +static int axg_audio_reset_assert(struct reset_controller_dev *rcdev, > + unsigned long id) > +{ > + return axg_audio_reset_update(rcdev, id, true); > +} > + > +static int axg_audio_reset_deassert(struct reset_controller_dev *rcdev, > + unsigned long id) > +{ > + return axg_audio_reset_update(rcdev, id, false); > +} > + > +static int axg_audio_reset_toggle(struct reset_controller_dev *rcdev, > + unsigned long id) > +{ > + int ret; > + > + ret = axg_audio_reset_assert(rcdev, id); > + if (ret) > + return ret; > + > + return axg_audio_reset_deassert(rcdev, id); > +} > + > +static const struct reset_control_ops axg_audio_rstc_ops = { > + .assert = axg_audio_reset_assert, > + .deassert = axg_audio_reset_deassert, > + .reset = axg_audio_reset_toggle, > + .status = axg_audio_reset_status, > +}; > + > static const struct regmap_config axg_audio_regmap_cfg = { > .reg_bits = 32, > .val_bits = 32, > @@ -925,12 +1004,15 @@ static const struct regmap_config axg_audio_regmap_cfg = { > > struct audioclk_data { > struct clk_hw_onecell_data *hw_onecell_data; > + unsigned int reset_offset; > + unsigned int reset_num; > }; > > static int axg_audio_clkc_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > const struct audioclk_data *data; > + struct axg_audio_reset_data *rst; > struct regmap *map; > struct resource *res; > void __iomem *regs; > @@ -1005,8 +1087,27 @@ static int axg_audio_clkc_probe(struct platform_device *pdev) > } > } > > - return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, > - data->hw_onecell_data); > + ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, > + data->hw_onecell_data); > + if (ret) > + return ret; > + > + /* Stop here if there is no reset */ > + if (!data->reset_num) > + return 0; > + > + rst = devm_kzalloc(dev, sizeof(*rst), GFP_KERNEL); > + if (!rst) > + return -ENOMEM; > + > + rst->map = map; > + rst->offset = data->reset_offset; > + rst->rstc.nr_resets = data->reset_num; > + rst->rstc.ops = &axg_audio_rstc_ops; > + rst->rstc.of_node = dev->of_node; > + rst->rstc.owner = THIS_MODULE; > + > + return ret = devm_reset_controller_register(dev, &rst->rstc); > } > > static const struct audioclk_data axg_audioclk_data = { > @@ -1015,6 +1116,8 @@ static const struct audioclk_data axg_audioclk_data = { > > static const struct audioclk_data g12a_audioclk_data = { > .hw_onecell_data = &g12a_audio_hw_onecell_data, > + .reset_offset = AUDIO_SW_RESET, > + .reset_num = 26, > }; > > static const struct of_device_id clkc_match_table[] = { > diff --git a/drivers/clk/meson/axg-audio.h b/drivers/clk/meson/axg-audio.h > index 5d972d55d6c7..c00e28b2e1a9 100644 > --- a/drivers/clk/meson/axg-audio.h > +++ b/drivers/clk/meson/axg-audio.h > @@ -22,6 +22,7 @@ > #define AUDIO_MCLK_F_CTRL 0x018 > #define AUDIO_MST_PAD_CTRL0 0x01c > #define AUDIO_MST_PAD_CTRL1 0x020 > +#define AUDIO_SW_RESET 0x024 > #define AUDIO_MST_A_SCLK_CTRL0 0x040 > #define AUDIO_MST_A_SCLK_CTRL1 0x044 > #define AUDIO_MST_B_SCLK_CTRL0 0x048 > Reviewed-by: Neil Armstrong _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic