[PATCH 4/8] Spi: sprd-adi: Supported multi parameter configurations

[Jiansheng Wu <jiansheng.wu@xxxxxxxxxx>]

It is supporting multi hardware and multi config on adi driver.
That we can define different parameter on boards' dts, and configure
cannels on adi-device.

Signed-off-by: Jiansheng Wu <jiansheng.wu@xxxxxxxxxx>
---
 drivers/spi/spi-sprd-adi.c | 35 ++++++++++++++++++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-sprd-adi.c b/drivers/spi/spi-sprd-adi.c
index 569a66943e8d..eea64d20279e 100644
--- a/drivers/spi/spi-sprd-adi.c
+++ b/drivers/spi/spi-sprd-adi.c
@@ -140,6 +140,8 @@
 #define WDG_UNLOCK_KEY			0xe551
 
 #define PANIC_REASON_LEN_MAX		20
+/*Adi single soft multi hard*/
+#define SPRD_ADI_MAGIC_LEN_MAX          5
 
 struct sprd_adi_data {
 	u32 slave_offset;
@@ -471,12 +473,40 @@ static int sprd_adi_restart_handler(struct notifier_block *this, unsigned long m
 	return NOTIFY_DONE;
 }
 
+static void sprd_adi_power_ssmh(char *adi_supply)
+{
+	struct device_node *cmdline_node;
+	const char *cmd_line, *adi_type;
+	char adi_value[SPRD_ADI_MAGIC_LEN_MAX] = "";
+	int ret;
+
+	cmdline_node = of_find_node_by_path("/chosen");
+	ret = of_property_read_string(cmdline_node, "bootargs", &cmd_line);
+	if (ret) {
+		pr_err("can't parse bootargs property\n");
+		return;
+	}
+
+	adi_type = strstr(cmd_line, "power.from.extern=");
+	if (!adi_type) {
+		pr_err("can't find power.from.extern\n");
+		return;
+	}
+
+	sscanf(adi_type, "power.from.extern=%s\n", adi_value);
+	if (!adi_value[0])
+		return;
+
+	strcat(adi_supply, adi_value);
+}
+
 static void sprd_adi_hw_init(struct sprd_adi *sadi)
 {
 	struct device_node *np = sadi->dev->of_node;
 	int i, size, chn_cnt;
 	const __be32 *list;
 	u32 tmp;
+	char adi_supply[25] = "sprd,hw-channels";
 
 	/* Set all channels as default priority */
 	writel_relaxed(0, sadi->base + REG_ADI_CHN_PRIL);
@@ -488,7 +518,10 @@ static void sprd_adi_hw_init(struct sprd_adi *sadi)
 	writel_relaxed(tmp, sadi->base + REG_ADI_GSSI_CFG0);
 
 	/* Set hardware channels setting */
-	list = of_get_property(np, "sprd,hw-channels", &size);
+	sprd_adi_power_ssmh(adi_supply);
+	dev_info(sadi->dev, "adi supply is %s\n", adi_supply);
+
+	list = of_get_property(np, adi_supply, &size);
 	if (!list || !size) {
 		dev_info(sadi->dev, "no hw channels setting in node\n");
 		return;
-- 
2.17.1