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Wysocki" , Len Brown , Mark Brown , Liam Girdwood CC: , , , , Stefan Binding Subject: [PATCH v1 2/2] ASoC: cs35l41: Read System Name from ACPI _SUB to identify firmware Date: Wed, 22 Jun 2022 14:07:30 +0100 Message-ID: <20220622130730.1573747-3-sbinding@opensource.cirrus.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220622130730.1573747-1-sbinding@opensource.cirrus.com> References: <20220622130730.1573747-1-sbinding@opensource.cirrus.com> MIME-Version: 1.0 X-Proofpoint-GUID: d4Xer4K1ffLl8TVON-jfV70-VNLBo7W_ X-Proofpoint-ORIG-GUID: d4Xer4K1ffLl8TVON-jfV70-VNLBo7W_ X-Proofpoint-Spam-Reason: safe Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org When loading firmware, wm_adsp uses a number of parameters to determine the path of the firmware and tuning files to load. One of these parameters is system_name. Add support in cs35l41 to read this system name from the ACPI _SUB ID in order to uniquely identify the firmware and tuning mapped to a particular system. Signed-off-by: Stefan Binding Reported-by: kernel test robot --- sound/soc/codecs/cs35l41.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/sound/soc/codecs/cs35l41.c b/sound/soc/codecs/cs35l41.c index 8766e19d85f1..5df04a2ab5a3 100644 --- a/sound/soc/codecs/cs35l41.c +++ b/sound/soc/codecs/cs35l41.c @@ -6,6 +6,7 @@ // // Author: David Rhodes +#include #include #include #include @@ -1142,6 +1143,28 @@ static int cs35l41_dsp_init(struct cs35l41_private *cs35l41) return ret; } +static int cs35l41_probe_acpi(struct cs35l41_private *cs35l41) +{ + struct acpi_device *adev; + int ret; + char sub[ACPI_MAX_SUB_BUF_SIZE]; + + adev = ACPI_COMPANION(cs35l41->dev); + /* If there is no ACPI_COMPANION, there is no ACPI for this system, return 0 */ + if (!adev) + return 0; + + ret = acpi_get_sub(adev->handle, sub, sizeof(sub)); + if (ret < 0) + return ret; + + cs35l41->dsp.system_name = devm_kstrdup(cs35l41->dev, sub, GFP_KERNEL); + if (!cs35l41->dsp.system_name) + return -ENOMEM; + + return 0; +} + int cs35l41_probe(struct cs35l41_private *cs35l41, const struct cs35l41_hw_cfg *hw_cfg) { u32 regid, reg_revid, i, mtl_revid, int_status, chipid_match; @@ -1270,6 +1293,10 @@ int cs35l41_probe(struct cs35l41_private *cs35l41, const struct cs35l41_hw_cfg * goto err; } + ret = cs35l41_probe_acpi(cs35l41); + if (ret < 0) + goto err; + ret = cs35l41_dsp_init(cs35l41); if (ret < 0) goto err;