Patchwork [4/9] mtd: gpmi: do not get the clock frequency in gpmi_begin()

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Submitter Huang Shijie
Date Sept. 11, 2012, 6:17 a.m.
Message ID <1347344231-10295-5-git-send-email-b32955@freescale.com>
Download mbox | patch
Permalink /patch/183014/
State New
Headers show

Comments

Huang Shijie - Sept. 11, 2012, 6:17 a.m.
The current code will gets the clock frequency which is used by
gpmi_nfc_compute_hardware_timing(). It makes the code a little mess.

So move the `get clock frequency` code to the
gpmi_nfc_compute_hardware_timing() itself. This makes the code tidy
and clean.
Signed-off-by: Huang Shijie <b32955@freescale.com>
---
 drivers/mtd/nand/gpmi-nand/gpmi-lib.c |    8 +++-----
 1 files changed, 3 insertions(+), 5 deletions(-)

Patch

diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
index fb9b3c1..eee0159 100644
--- a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
+++ b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
@@ -293,6 +293,7 @@  static int gpmi_nfc_compute_hardware_timing(struct gpmi_nand_data *this,
 					struct gpmi_nfc_hardware_timing *hw)
 {
 	struct timing_threshod *nfc = &timing_default_threshold;
+	struct resources *r = &this->resources;
 	struct nand_chip *nand = &this->nand;
 	struct nand_timing target = this->timing;
 	bool improved_timing_is_available;
@@ -332,6 +333,7 @@  static int gpmi_nfc_compute_hardware_timing(struct gpmi_nand_data *this,
 		(target.tRHOH_in_ns >= 0) ;
 
 	/* Inspect the clock. */
+	nfc->clock_frequency_in_hz = clk_get_rate(r->clock[0]);
 	clock_frequency_in_hz = nfc->clock_frequency_in_hz;
 	clock_period_in_ns    = 1000000000 / clock_frequency_in_hz;
 
@@ -738,7 +740,6 @@  return_results:
 void gpmi_begin(struct gpmi_nand_data *this)
 {
 	struct resources *r = &this->resources;
-	struct timing_threshod *nfc = &timing_default_threshold;
 	void __iomem *gpmi_regs = r->gpmi_regs;
 	unsigned int   clock_period_in_ns;
 	uint32_t       reg;
@@ -753,10 +754,6 @@  void gpmi_begin(struct gpmi_nand_data *this)
 		goto err_out;
 	}
 
-	/* Get the timing information we need. */
-	nfc->clock_frequency_in_hz = clk_get_rate(r->clock[0]);
-	clock_period_in_ns = 1000000000 / nfc->clock_frequency_in_hz;
-
 	gpmi_nfc_compute_hardware_timing(this, &hw);
 
 	/* [1] Set HW_GPMI_TIMING0 */
@@ -801,6 +798,7 @@  void gpmi_begin(struct gpmi_nand_data *this)
 	 *
 	 * Calculate the amount of time we need to wait, in microseconds.
 	 */
+	clock_period_in_ns = 1000000000 / clk_get_rate(r->clock[0]);
 	dll_wait_time_in_us = (clock_period_in_ns * 64) / 1000;
 
 	if (!dll_wait_time_in_us)