Merge "misc: qfpfuse: Add dt support to read blow timeout" (bb70b8ca) · Commits · e / devices / android_kernel_sony_msm8994

Documentation/devicetree/bindings/misc/qfp-fuse.txt

+9 −0

Original line number	Diff line number	Diff line
		@@ -15,6 +15,15 @@ Optional Properties:
		- qti,blow-status-offset: offset of the blow status registers.
		The default offset is 0x204C. Include this only if the blow status register
		is at the different offset.
		- qti,blow-timer: blow timer value.
		The value specifies the blow time in number of blow timer clock cycles.
		The default setting is 0xF0. It meets the requirement for 28nm HPm fuse
		technology with blow timer clock at 19.2Mhz (12us blow time).
		Specify this only if the fuse blow time is different. The following are the
		recommended settings:
		- 0x280 (10us) for 45nm LP technology with 64Mhz blow timer clock
		- 0x100 (4us) for 28nm LP technology with 64Mhz blow timer clock
		- 0x1E (12us) for 28nm LP technology with 2.5Mhz blow timer clock

		Example:
		qti,qfpfuse@fc4b8000 {

drivers/misc/qfp_fuse.c

+9 −2

Original line number	Diff line number	Diff line
		@@ -34,7 +34,7 @@
		/*
		* Denotes number of cycles required to blow the fuse.
		*/
		#define QFPROM_BLOW_TIMER_VALUE (QFPROM_BLOW_TIMEOUT_US * 83)
		#define QFPROM_BLOW_TIMER_VALUE 0xF0

		#define QFPROM_BLOW_STATUS_OFFSET 0x204C
		#define QFPROM_BLOW_STATUS_BUSY 0x01
		@@ -51,6 +51,7 @@ struct qfp_priv_t {
		uint32_t base;
		uint32_t end;
		uint32_t blow_status_offset;
		uint32_t blow_timer;
		struct mutex lock;
		struct regulator *fuse_vdd;
		u8 state;
		@@ -60,6 +61,7 @@ struct qfp_resource {
		resource_size_t start;
		resource_size_t size;
		uint32_t blow_status_offset;
		uint32_t blow_timer;
		const char *regulator_name;
		};

		@@ -143,7 +145,7 @@ static int qfp_fuse_write_word(u32 *addr, u32 data)
		int err;

		/* Set QFPROM blow timer register */
		writel_relaxed(QFPROM_BLOW_TIMER_VALUE,
		writel_relaxed(qfp_priv->blow_timer,
		qfp_priv->base + QFPROM_BLOW_TIMER_OFFSET);
		mb();

		@@ -344,6 +346,7 @@ static int qfp_get_resource(struct platform_device *pdev,
		struct resource *res;
		const char *regulator_name = NULL;
		uint32_t blow_status_offset = QFPROM_BLOW_STATUS_OFFSET;
		uint32_t blow_timer = QFPROM_BLOW_TIMER_VALUE;

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		if (!res)
		@@ -369,6 +372,8 @@ static int qfp_get_resource(struct platform_device *pdev,
		return -EINVAL;
		}

		of_property_read_u32(np, "qti,blow-timer", &blow_timer);

		} else {
		regulator_name = pdev->dev.platform_data;
		}
		@@ -379,6 +384,7 @@ static int qfp_get_resource(struct platform_device *pdev,
		qfp_res->start = res->start;
		qfp_res->size = resource_size(res);
		qfp_res->blow_status_offset = blow_status_offset;
		qfp_res->blow_timer = blow_timer;
		qfp_res->regulator_name = regulator_name;

		return 0;
		@@ -408,6 +414,7 @@ static int qfp_fuse_probe(struct platform_device *pdev)
		}
		qfp_priv->end = qfp_priv->base + res.size;
		qfp_priv->blow_status_offset = res.blow_status_offset;
		qfp_priv->blow_timer = res.blow_timer;

		/* Get regulator for QFPROM writes */
		qfp_priv->fuse_vdd = regulator_get(&pdev->dev, res.regulator_name);