Thread (14 messages) 14 messages, 3 authors, 2015-02-04

[PATCH v3 4/6] mmc: pwrseq_simple: Add optional reference clock support

From: Javier Martinez Canillas <hidden>
Date: 2015-01-30 13:03:40
Also in: linux-devicetree, linux-mmc, linux-samsung-soc, lkml

Hello Ulf,

On 01/30/2015 12:17 PM, Ulf Hansson wrote:
quoted
 };
@@ -39,6 +42,11 @@ static void mmc_pwrseq_simple_pre_power_on(struct mmc_host *host)
        struct mmc_pwrseq_simple *pwrseq = container_of(host->pwrseq,
                                        struct mmc_pwrseq_simple, pwrseq);

+       if (!IS_ERR(pwrseq->ext_clk)) {
This should be:

if (!IS_ERR(pwrseq->ext_clk) && !pwrseq->clk_enabled) {
Oh, I thought that it was not possible to enter mmc_pwrseq_pre_power_on()
twice without a prior call to mmc_pwrseq_power_off() but I guess I didn't
read the MMC core code carefully...
 
quoted
+               clk_prepare_enable(pwrseq->ext_clk);
+               pwrseq->clk_enabled = true;
+       }
+
        mmc_pwrseq_simple_set_gpios_value(pwrseq, 1);
 }
@@ -50,6 +58,19 @@ static void mmc_pwrseq_simple_post_power_on(struct mmc_host *host)
        mmc_pwrseq_simple_set_gpios_value(pwrseq, 0);
 }

+static void mmc_pwrseq_simple_power_off(struct mmc_host *host)
+{
+       struct mmc_pwrseq_simple *pwrseq = container_of(host->pwrseq,
+                                       struct mmc_pwrseq_simple, pwrseq);
+
+       mmc_pwrseq_simple_set_gpios_value(pwrseq, 1);
+
+       if (pwrseq->clk_enabled) {
I changed this as well, but that was just to make code clearer.

if (!IS_ERR(pwrseq->ext_clk) && pwrseq->clk_enabled) {
Yeah, if IS_ERR(pwrseq->ext_clk) then clk_enabled will always be false but I
agree that the change makes the code to be more consistent.
quoted
As I stated in the response to he coverletter for the patchset, this
patch is applied for next with above changes.

Thanks!
Thanks a lot for your help and for fixing these things!
Kind regards
Uffe
Best regards,
Javier
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