Hi Paul,

On Thursday 01 September 2011 05:30 AM, Paul Walmsley wrote:
Hi,

a comment:

On Wed, 31 Aug 2011, Keerthy wrote:

div_ts_ck feeds only the temperature sensor functional clock
and also has a clksel associated (for divider selection). Mapping this
as the functional clock for the temperature sensor in clkdev table,
so a clk_set_rate() in the driver would have the effect of changing the
temperature sensor clock rate indirectly.

Signed-off-by: Keerthy<j-keer...@ti.com>
Reviewed-by: Rajendra Nayak<rna...@ti.com>
Cc: t...@atomide.com
Cc: rna...@ti.com
---
  arch/arm/mach-omap2/clock44xx_data.c |    2 +-
  1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mach-omap2/clock44xx_data.c 
b/arch/arm/mach-omap2/clock44xx_data.c
index 2af0e3f..4a788f4 100644
--- a/arch/arm/mach-omap2/clock44xx_data.c
+++ b/arch/arm/mach-omap2/clock44xx_data.c
@@ -3187,7 +3187,7 @@ static struct omap_clk omap44xx_clks[] = {
        CLK(NULL,       "bandgap_fclk",                       &bandgap_fclk,    
  CK_443X),
        CLK(NULL,       "bandgap_ts_fclk",            &bandgap_ts_fclk,   
CK_446X),
        CLK(NULL,       "des3des_fck",                        &des3des_fck,     
  CK_443X),
-       CLK(NULL,       "div_ts_ck",                  &div_ts_ck, CK_446X),
+       CLK("omap_temp_sensor.0",     "fck",                        &div_ts_ck, 
CK_446X),

It shouldn't be necessary to add the device name/ID here.  We're trying
to get rid of these.  The omap_device code should take care of adding the
appropriate alias.

The problem seems to be that we have 2 clock nodes modeled,
bandgap_ts_fclk with enable/disable ops, (which also happens
to be the main_clk for the bandgap hwmod) and div_ts_ck (as
parent of bandgap_ts_fclk) with clksel for divider selection.
Like you said, the clkdev entries are added by omap_device code
for bandgap_ts_fclk, however doing a clk_set_rate on it from
the driver has no effect as the clksel information is missing
and is modeled in the parent (div_ts_ck) node.
From looking at it, it makes sense to merge these 2 nodes and fix
the autogen scripts which currently generate 2 separate nodes.
what do you think?

regards,
Rajendra




        CLK(NULL,       "dmic_sync_mux_ck",           &dmic_sync_mux_ck,  
CK_443X),
        CLK(NULL,       "dmic_fck",                   &dmic_fck,  CK_443X),
        CLK(NULL,       "dsp_fck",                    &dsp_fck,   CK_443X),
--
1.7.0.4

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- Paul

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