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Ip=[149.199.60.100]; Helo=[xsj-pvapsmtpgw02] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR02MB2682 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190611_025719_549695_3DC217E8 X-CRM114-Status: GOOD ( 14.41 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add API for setting SDIO Tap Delays on ZynqMP platforms. Signed-off-by: Manish Narani --- drivers/firmware/xilinx/zynqmp.c | 32 ++++++++++++++++++++++++++++++++ include/linux/firmware/xlnx-zynqmp.h | 17 ++++++++++++++++- 2 files changed, 48 insertions(+), 1 deletion(-) diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c index fd3d837..c6f9e72 100644 --- a/drivers/firmware/xilinx/zynqmp.c +++ b/drivers/firmware/xilinx/zynqmp.c @@ -664,6 +664,37 @@ static int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities, qos, ack, NULL); } +/** + * zynqmp_pm_sdio_setphase() - PM call to set clock delays for SD clock + * @device_id: Device ID of the SD controller + * @degrees: Tap Delay value in degrees for Input/Output clocks + * + * This API function is to be used for setting the clock delays for SD + * clock. + * + * Return: Returns status, either success or error+reason + */ +static int zynqmp_pm_sdio_setphase(u32 device_id, int degrees) +{ + u32 node_id = (!device_id) ? NODE_SD_0 : NODE_SD_1; + enum tap_delay_type tap_type; + int ret; + + if (degrees < INPUT_TAP_BOUNDARY) { + tap_type = PM_TAPDELAY_INPUT; + } else { + tap_type = PM_TAPDELAY_OUTPUT; + degrees -= INPUT_TAP_BOUNDARY; + } + + ret = zynqmp_pm_ioctl(node_id, IOCTL_SET_SD_TAPDELAY, tap_type, + degrees, NULL); + if (ret) + pr_err("Error setting Tap Delay\n"); + + return ret; +} + static const struct zynqmp_eemi_ops eemi_ops = { .get_api_version = zynqmp_pm_get_api_version, .get_chipid = zynqmp_pm_get_chipid, @@ -687,6 +718,7 @@ static const struct zynqmp_eemi_ops eemi_ops = { .set_requirement = zynqmp_pm_set_requirement, .fpga_load = zynqmp_pm_fpga_load, .fpga_get_status = zynqmp_pm_fpga_get_status, + .sdio_setphase = zynqmp_pm_sdio_setphase, }; /** diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/xlnx-zynqmp.h index 1262ea6..0fc4bf7 100644 --- a/include/linux/firmware/xlnx-zynqmp.h +++ b/include/linux/firmware/xlnx-zynqmp.h @@ -56,6 +56,9 @@ #define XILINX_ZYNQMP_PM_FPGA_FULL 0x0U #define XILINX_ZYNQMP_PM_FPGA_PARTIAL BIT(0) +/* Input Tap Delay Boundary Value */ +#define INPUT_TAP_BOUNDARY 0x100 + enum pm_api_id { PM_GET_API_VERSION = 1, PM_REQUEST_NODE = 13, @@ -92,7 +95,8 @@ enum pm_ret_status { }; enum pm_ioctl_id { - IOCTL_SET_PLL_FRAC_MODE = 8, + IOCTL_SET_SD_TAPDELAY = 7, + IOCTL_SET_PLL_FRAC_MODE, IOCTL_GET_PLL_FRAC_MODE, IOCTL_SET_PLL_FRAC_DATA, IOCTL_GET_PLL_FRAC_DATA, @@ -251,6 +255,16 @@ enum zynqmp_pm_request_ack { ZYNQMP_PM_REQUEST_ACK_NON_BLOCKING, }; +enum pm_node_id { + NODE_SD_0 = 39, + NODE_SD_1, +}; + +enum tap_delay_type { + PM_TAPDELAY_INPUT = 0, + PM_TAPDELAY_OUTPUT, +}; + /** * struct zynqmp_pm_query_data - PM query data * @qid: query ID @@ -295,6 +309,7 @@ struct zynqmp_eemi_ops { const u32 capabilities, const u32 qos, const enum zynqmp_pm_request_ack ack); + int (*sdio_setphase)(u32 device_id, int degrees); }; int zynqmp_pm_invoke_fn(u32 pm_api_id, u32 arg0, u32 arg1, -- 2.1.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel